*~
*.log
-*.exe
-*.gz
-*.lo
-*.o
*.orig
*.output
*.pop
*.rej
-*.rpm
-*.tar
-*/*.l[oa]
-*/*/*.l[oa]
-*/*/.deps
-*/*/.dirstamp
-*/*/.libs
-*/.deps
-*/.dirstamp
-*/.libs
-*/Makefile
-*/Makefile.in
*TAGS
*patch
-.deps
.cproject
.idea/
.project
.settings/
-src/bin/memaslap
-src/bin/memcapable
-src/bin/memcat
-src/bin/memcp
-src/bin/memdump
-src/bin/memerror
-src/bin/memexist
-src/bin/memflush
-src/bin/memparse
-src/bin/memping
-src/bin/memrm
-src/bin/memslap
-src/bin/memstat
-src/bin/memtouch
cmake-build-*/
ccmake-*/
-example/memcached_light
-example/t/memcached_light
tags
venv/
/infer-out/
--- /dev/null
+/* LibMemcached
+ * Copyright (C) 2006-2009 Brian Aker
+ * All rights reserved.
+ *
+ * Use and distribution licensed under the BSD license. See
+ * the COPYING file in the parent directory for full text.
+ *
+ * Summary:
+ *
+ */
+
+#ifndef CLIENTS_MS_ATOMIC_H
+#define CLIENTS_MS_ATOMIC_H
+
+#if HAVE_C_STDATOMIC
+# define ATOMIC _Atomic
+#else
+# define ATOMIC volatile
+#endif
+
+#if defined(__SUNPRO_C)
+# define _KERNEL
+# include <atomic.h>
+# if SIZEOF_SIZE_T == 8
+# define atomic_add_size(X, Y) atomic_add_64((X), (Y))
+# define atomic_add_size_nv(X, Y) atomic_add_64((X), (Y))
+# define atomic_dec_size(X, Y) atomic_add_64((X), (Y))
+# define atomic_dec_size_nv(X, Y) atomic_add_64((X), (Y))
+# else
+# define atomic_add_size(X, Y) atomic_add_32((X), (Y))
+# define atomic_add_size_nv(X, Y) atomic_add_32((X), (Y))
+# define atomic_dec_size(X, Y) atomic_add_32((X), (Y))
+# define atomic_dec_size_nv(X, Y) atomic_add_32((X), (Y))
+# endif
+# undef _KERNEL
+#elif HAVE_GCC_ATOMIC_BUILTINS
+# define atomic_add_8(X, Y) __sync_fetch_and_add((X), (Y))
+# define atomic_add_16(X, Y) __sync_fetch_and_add((X), (Y))
+# define atomic_add_32(X, Y) __sync_fetch_and_add((X), (Y))
+# define atomic_add_size(X, Y) __sync_fetch_and_add((X), (Y))
+# define atomic_dec_8(X) __sync_fetch_and_sub((X), 1)
+# define atomic_dec_16(X) __sync_fetch_and_sub((X), 1)
+# define atomic_dec_32(X) __sync_fetch_and_sub((X), 1)
+# define atomic_dec_size(X) __sync_fetch_and_sub((X), 1)
+/* The same as above, but these return the new value instead of void */
+# define atomic_add_8_nv(X, Y) __sync_fetch_and_add((X), (Y))
+# define atomic_add_16_nv(X, Y) __sync_fetch_and_add((X), (Y))
+# define atomic_add_32_nv(X, Y) __sync_fetch_and_add((X), (Y))
+# define atomic_add_size_nv(X, Y) __sync_fetch_and_add((X), (Y))
+# define atomic_dec_8_nv(X) __sync_fetch_and_sub((X), 1)
+# define atomic_dec_16_nv(X) __sync_fetch_and_sub((X), 1)
+# define atomic_dec_32_nv(X) __sync_fetch_and_sub((X), 1)
+# define atomic_dec_size_nv(X) __sync_fetch_and_sub((X), 1)
+#elif HAVE_C_STDATOMIC
+# include <stdatomic.h>
+# define atomic_add_8(X, Y) atomic_fetch_add(X, Y)
+# define atomic_add_16(X, Y) atomic_fetch_add(X, Y)
+# define atomic_add_32(X, Y) atomic_fetch_add(X, Y)
+# define atomic_add_size(X, Y) atomic_fetch_add(X, Y)
+# define atomic_dec_8(X) atomic_fetch_sub(X, 1)
+# define atomic_dec_16(X) atomic_fetch_sub(X, 1)
+# define atomic_dec_32(X) atomic_fetch_sub(X, 1)
+# define atomic_dec_size(X) atomic_fetch_sub(X, 1)
+/* The same as above, but these return the new value instead of void */
+# define ATOMIC_ADD_FETCH_DECL(T) \
+static inline T atomic_add_fetch_##T(ATOMIC T *ptr, T add) { \
+ T des, cur = atomic_load(ptr); \
+ do { \
+ des = cur + add; \
+ } while(!atomic_compare_exchange_weak(ptr, &cur, des)); \
+ return des; \
+}
+# define ATOMIC_SUB_FETCH_DECL(T) \
+T atomic_sub_fetch_##T(ATOMIC T *ptr) { \
+ T des, cur = atomic_load(ptr); \
+ do { \
+ des = cur - 1; \
+ } while(!atomic_compare_exchange_weak(ptr, &cur, des)); \
+ return des; \
+}
+ATOMIC_ADD_FETCH_DECL(uint8_t)
+# define atomic_add_8_nv(X, Y) atomic_add_fetch_uint8_t(X, Y)
+ATOMIC_ADD_FETCH_DECL(uint16_t)
+# define atomic_add_16_nv(X, Y) atomic_add_fetch_uint16_t(X, Y)
+ATOMIC_ADD_FETCH_DECL(uint32_t)
+# define atomic_add_32_nv(X, Y) atomic_add_fetch_uint32_t(X, Y)
+ATOMIC_ADD_FETCH_DECL(size_t)
+# define atomic_add_size_nv(X, Y) atomic_add_fetch_size_t(X, Y)
+# define atomic_dec_8_nv(X) atomic_sub_fetch<uint8_t>(X, Y)
+# define atomic_dec_16_nv(X) atomic_sub_fetch<uint16_t>(X, Y)
+# define atomic_dec_32_nv(X) atomic_sub_fetch<uint32_t>(X, Y)
+# define atomic_dec_size_nv(X) atomic_sub_fetch<size_t>(X, Y)
+#else
+#warning "Atomic operators not found so memslap will not work correctly"
+# define atomic_add_8(X, Y) 0
+# define atomic_add_16(X, Y) 0
+# define atomic_add_32(X, Y) 0
+# define atomic_add_size(X, Y) 0
+# define atomic_dec_8(X) 0
+# define atomic_dec_16(X) 0
+# define atomic_dec_32(X) 0
+# define atomic_dec_size(X) 0
+/* The same as above, but these return the new value instead of void */
+# define atomic_add_8_nv(X, Y) 0
+# define atomic_add_16_nv(X, Y) 0
+# define atomic_add_32_nv(X, Y) 0
+# define atomic_add_size_nv(X, Y) 0
+# define atomic_dec_8_nv(X) 0
+# define atomic_dec_16_nv(X) 0
+# define atomic_dec_32_nv(X) 0
+# define atomic_dec_size_nv(X) 0
+#endif /* defined(__SUNPRO_C) */
+
+#endif /* CLIENTS_MS_ATOMIC_H */
--- /dev/null
+/*
+ * File: ms_conn.c
+ * Author: Mingqiang Zhuang
+ *
+ * Created on February 10, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ */
+
+#include "mem_config.h"
+
+#include <stdio.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <sys/uio.h>
+#include <event.h>
+#include <fcntl.h>
+#include <netinet/tcp.h>
+#include <netinet/in.h>
+
+#if defined(HAVE_ARPA_INET_H)
+# include <arpa/inet.h>
+#endif
+
+#if defined(HAVE_SYS_TIME_H)
+# include <sys/time.h>
+#endif
+
+#if defined(HAVE_TIME_H)
+# include <time.h>
+#endif
+
+#include "ms_setting.h"
+#include "ms_thread.h"
+#include "ms_atomic.h"
+
+#ifdef linux
+/* /usr/include/netinet/in.h defines macros from ntohs() to _bswap_nn to
+ * optimize the conversion functions, but the prototypes generate warnings
+ * from gcc. The conversion methods isn't the bottleneck for my app, so
+ * just remove the warnings by undef'ing the optimization ..
+ */
+#undef ntohs
+#undef ntohl
+#undef htons
+#undef htonl
+#endif
+
+/* for network write */
+#define TRANSMIT_COMPLETE 0
+#define TRANSMIT_INCOMPLETE 1
+#define TRANSMIT_SOFT_ERROR 2
+#define TRANSMIT_HARD_ERROR 3
+
+/* for generating key */
+#define KEY_PREFIX_BASE 0x1010101010101010 /* not include ' ' '\r' '\n' '\0' */
+#define KEY_PREFIX_MASK 0x1010101010101010
+
+/* For parse the value length return by server */
+#define KEY_TOKEN 1
+#define VALUELEN_TOKEN 3
+
+/* global increasing counter, to ensure the key prefix unique */
+static uint64_t key_prefix_seq= KEY_PREFIX_BASE;
+
+/* global increasing counter, generating request id for UDP */
+static ATOMIC uint32_t udp_request_id= 0;
+
+extern pthread_key_t ms_thread_key;
+
+/* generate upd request id */
+static uint32_t ms_get_udp_request_id(void);
+
+
+/* connect initialize */
+static void ms_task_init(ms_conn_t *c);
+static int ms_conn_udp_init(ms_conn_t *c, const bool is_udp);
+static int ms_conn_sock_init(ms_conn_t *c);
+static int ms_conn_event_init(ms_conn_t *c);
+static int ms_conn_init(ms_conn_t *c,
+ const int init_state,
+ const int read_buffer_size,
+ const bool is_udp);
+static void ms_warmup_num_init(ms_conn_t *c);
+static int ms_item_win_init(ms_conn_t *c);
+
+
+/* connection close */
+void ms_conn_free(ms_conn_t *c);
+static void ms_conn_close(ms_conn_t *c);
+
+
+/* create network connection */
+static int ms_new_socket(struct addrinfo *ai);
+static void ms_maximize_sndbuf(const int sfd);
+static int ms_network_connect(ms_conn_t *c,
+ char *srv_host_name,
+ const int srv_port,
+ const bool is_udp,
+ int *ret_sfd);
+static int ms_reconn(ms_conn_t *c);
+
+
+/* read and parse */
+static int ms_tokenize_command(char *command,
+ token_t *tokens,
+ const int max_tokens);
+static int ms_ascii_process_line(ms_conn_t *c, char *command);
+static int ms_try_read_line(ms_conn_t *c);
+static int ms_sort_udp_packet(ms_conn_t *c, char *buf, int rbytes);
+static int ms_udp_read(ms_conn_t *c, char *buf, int len);
+static int ms_try_read_network(ms_conn_t *c);
+static void ms_verify_value(ms_conn_t *c,
+ ms_mlget_task_item_t *mlget_item,
+ char *value,
+ int vlen);
+static void ms_ascii_complete_nread(ms_conn_t *c);
+static void ms_bin_complete_nread(ms_conn_t *c);
+static void ms_complete_nread(ms_conn_t *c);
+
+
+/* send functions */
+static int ms_add_msghdr(ms_conn_t *c);
+static int ms_ensure_iov_space(ms_conn_t *c);
+static int ms_add_iov(ms_conn_t *c, const void *buf, int len);
+static int ms_build_udp_headers(ms_conn_t *c);
+static int ms_transmit(ms_conn_t *c);
+
+
+/* status adjustment */
+static void ms_conn_shrink(ms_conn_t *c);
+static void ms_conn_set_state(ms_conn_t *c, int state);
+static bool ms_update_event(ms_conn_t *c, const int new_flags);
+static uint32_t ms_get_rep_sock_index(ms_conn_t *c, int cmd);
+static uint32_t ms_get_next_sock_index(ms_conn_t *c);
+static int ms_update_conn_sock_event(ms_conn_t *c);
+static bool ms_need_yield(ms_conn_t *c);
+static void ms_update_start_time(ms_conn_t *c);
+
+
+/* main loop */
+static void ms_drive_machine(ms_conn_t *c);
+void ms_event_handler(const int fd, const short which, void *arg);
+
+
+/* ascii protocol */
+static int ms_build_ascii_write_buf_set(ms_conn_t *c, ms_task_item_t *item);
+static int ms_build_ascii_write_buf_get(ms_conn_t *c, ms_task_item_t *item);
+static int ms_build_ascii_write_buf_mlget(ms_conn_t *c);
+
+
+/* binary protocol */
+static int ms_bin_process_response(ms_conn_t *c);
+static void ms_add_bin_header(ms_conn_t *c,
+ uint8_t opcode,
+ uint8_t hdr_len,
+ uint16_t key_len,
+ uint32_t body_len);
+static void ms_add_key_to_iov(ms_conn_t *c, ms_task_item_t *item);
+static int ms_build_bin_write_buf_set(ms_conn_t *c, ms_task_item_t *item);
+static int ms_build_bin_write_buf_get(ms_conn_t *c, ms_task_item_t *item);
+static int ms_build_bin_write_buf_mlget(ms_conn_t *c);
+
+
+/**
+ * each key has two parts, prefix and suffix. The suffix is a
+ * string random get form the character table. The prefix is a
+ * uint64_t variable. And the prefix must be unique. we use the
+ * prefix to identify a key. And the prefix can't include
+ * character ' ' '\r' '\n' '\0'.
+ *
+ * @return uint64_t
+ */
+uint64_t ms_get_key_prefix(void)
+{
+ uint64_t key_prefix;
+
+ pthread_mutex_lock(&ms_global.seq_mutex);
+ key_prefix_seq|= KEY_PREFIX_MASK;
+ key_prefix= key_prefix_seq;
+ key_prefix_seq++;
+ pthread_mutex_unlock(&ms_global.seq_mutex);
+
+ return key_prefix;
+} /* ms_get_key_prefix */
+
+
+/**
+ * get an unique udp request id
+ *
+ * @return an unique UDP request id
+ */
+static uint32_t ms_get_udp_request_id(void)
+{
+ return atomic_add_32_nv(&udp_request_id, 1);
+}
+
+
+/**
+ * initialize current task structure
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_task_init(ms_conn_t *c)
+{
+ c->curr_task.cmd= CMD_NULL;
+ c->curr_task.item= 0;
+ c->curr_task.verify= false;
+ c->curr_task.finish_verify= true;
+ c->curr_task.get_miss= true;
+
+ c->curr_task.get_opt= 0;
+ c->curr_task.set_opt= 0;
+ c->curr_task.cycle_undo_get= 0;
+ c->curr_task.cycle_undo_set= 0;
+ c->curr_task.verified_get= 0;
+ c->curr_task.overwrite_set= 0;
+} /* ms_task_init */
+
+
+/**
+ * initialize udp for the connection structure
+ *
+ * @param c, pointer of the concurrency
+ * @param is_udp, whether it's udp
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_conn_udp_init(ms_conn_t *c, const bool is_udp)
+{
+ c->hdrbuf= 0;
+ c->rudpbuf= 0;
+ c->udppkt= 0;
+
+ c->rudpsize= UDP_DATA_BUFFER_SIZE;
+ c->hdrsize= 0;
+
+ c->rudpbytes= 0;
+ c->packets= 0;
+ c->recvpkt= 0;
+ c->pktcurr= 0;
+ c->ordcurr= 0;
+
+ c->udp= is_udp;
+
+ if (c->udp || (! c->udp && ms_setting.facebook_test))
+ {
+ c->rudpbuf= (char *)malloc((size_t)c->rudpsize);
+ c->udppkt= (ms_udppkt_t *)malloc(MAX_UDP_PACKET * sizeof(ms_udppkt_t));
+
+ if ((c->rudpbuf == NULL) || (c->udppkt == NULL))
+ {
+ if (c->rudpbuf != NULL)
+ free(c->rudpbuf);
+ if (c->udppkt != NULL)
+ free(c->udppkt);
+ fprintf(stderr, "malloc()\n");
+ return -1;
+ }
+ memset(c->udppkt, 0, MAX_UDP_PACKET * sizeof(ms_udppkt_t));
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_conn_udp_init */
+
+
+/**
+ * initialize the connection structure
+ *
+ * @param c, pointer of the concurrency
+ * @param init_state, (conn_read, conn_write, conn_closing)
+ * @param read_buffer_size
+ * @param is_udp, whether it's udp
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_conn_init(ms_conn_t *c,
+ const int init_state,
+ const int read_buffer_size,
+ const bool is_udp)
+{
+ assert(c != NULL);
+
+ c->rbuf= c->wbuf= 0;
+ c->iov= 0;
+ c->msglist= 0;
+
+ c->rsize= read_buffer_size;
+ c->wsize= WRITE_BUFFER_SIZE;
+ c->iovsize= IOV_LIST_INITIAL;
+ c->msgsize= MSG_LIST_INITIAL;
+
+ /* for replication, each connection need connect all the server */
+ if (ms_setting.rep_write_srv > 0)
+ {
+ c->total_sfds= ms_setting.srv_cnt * ms_setting.sock_per_conn;
+ }
+ else
+ {
+ c->total_sfds= ms_setting.sock_per_conn;
+ }
+ c->alive_sfds= 0;
+
+ c->rbuf= (char *)malloc((size_t)c->rsize);
+ c->wbuf= (char *)malloc((size_t)c->wsize);
+ c->iov= (struct iovec *)malloc(sizeof(struct iovec) * (size_t)c->iovsize);
+ c->msglist= (struct msghdr *)malloc(
+ sizeof(struct msghdr) * (size_t)c->msgsize);
+ if (ms_setting.mult_key_num > 1)
+ {
+ c->mlget_task.mlget_item= (ms_mlget_task_item_t *)
+ malloc(
+ sizeof(ms_mlget_task_item_t) * (size_t)ms_setting.mult_key_num);
+ }
+ c->tcpsfd= (int *)malloc((size_t)c->total_sfds * sizeof(int));
+
+ if ((c->rbuf == NULL) || (c->wbuf == NULL) || (c->iov == NULL)
+ || (c->msglist == NULL) || (c->tcpsfd == NULL)
+ || ((ms_setting.mult_key_num > 1)
+ && (c->mlget_task.mlget_item == NULL)))
+ {
+ if (c->rbuf != NULL)
+ free(c->rbuf);
+ if (c->wbuf != NULL)
+ free(c->wbuf);
+ if (c->iov != NULL)
+ free(c->iov);
+ if (c->msglist != NULL)
+ free(c->msglist);
+ if (c->mlget_task.mlget_item != NULL)
+ free(c->mlget_task.mlget_item);
+ if (c->tcpsfd != NULL)
+ free(c->tcpsfd);
+ fprintf(stderr, "malloc()\n");
+ return -1;
+ }
+
+ c->state= init_state;
+ c->rvbytes= 0;
+ c->rbytes= 0;
+ c->rcurr= c->rbuf;
+ c->wcurr= c->wbuf;
+ c->iovused= 0;
+ c->msgcurr= 0;
+ c->msgused= 0;
+ c->cur_idx= c->total_sfds; /* default index is a invalid value */
+
+ c->ctnwrite= false;
+ c->readval= false;
+ c->change_sfd= false;
+
+ c->precmd.cmd= c->currcmd.cmd= CMD_NULL;
+ c->precmd.isfinish= true; /* default the previous command finished */
+ c->currcmd.isfinish= false;
+ c->precmd.retstat= c->currcmd.retstat= MCD_FAILURE;
+ c->precmd.key_prefix= c->currcmd.key_prefix= 0;
+
+ c->mlget_task.mlget_num= 0;
+ c->mlget_task.value_index= -1; /* default invalid value */
+
+ if (ms_setting.binary_prot_)
+ {
+ c->protocol= binary_prot;
+ }
+ else
+ {
+ c->protocol= ascii_prot;
+ }
+
+ /* initialize udp */
+ if (ms_conn_udp_init(c, is_udp) != 0)
+ {
+ return -1;
+ }
+
+ /* initialize task */
+ ms_task_init(c);
+
+ if (! (ms_setting.facebook_test && is_udp))
+ {
+ atomic_add_32(&ms_stats.active_conns, 1);
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_conn_init */
+
+
+/**
+ * when doing 100% get operation, it could preset some objects
+ * to warmup the server. this function is used to initialize the
+ * number of the objects to preset.
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_warmup_num_init(ms_conn_t *c)
+{
+ /* no set operation, preset all the items in the window */
+ if (ms_setting.cmd_distr[CMD_SET].cmd_prop < PROP_ERROR)
+ {
+ c->warmup_num= c->win_size;
+ c->remain_warmup_num= c->warmup_num;
+ }
+ else
+ {
+ c->warmup_num= 0;
+ c->remain_warmup_num= c->warmup_num;
+ }
+} /* ms_warmup_num_init */
+
+
+/**
+ * each connection has an item window, this function initialize
+ * the window. The window is used to generate task.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_item_win_init(ms_conn_t *c)
+{
+ ms_thread_t *ms_thread= pthread_getspecific(ms_thread_key);
+ int exp_cnt= 0;
+
+ c->win_size= (int)ms_setting.win_size;
+ c->set_cursor= 0;
+ c->exec_num= ms_thread->thread_ctx->exec_num_perconn;
+ c->remain_exec_num= c->exec_num;
+
+ c->item_win= (ms_task_item_t *)malloc(
+ sizeof(ms_task_item_t) * (size_t)c->win_size);
+ if (c->item_win == NULL)
+ {
+ fprintf(stderr, "Can't allocate task item array for conn.\n");
+ return -1;
+ }
+ memset(c->item_win, 0, sizeof(ms_task_item_t) * (size_t)c->win_size);
+
+ for (int i= 0; i < c->win_size; i++)
+ {
+ c->item_win[i].key_size= (int)ms_setting.distr[i].key_size;
+ c->item_win[i].key_prefix= ms_get_key_prefix();
+ c->item_win[i].key_suffix_offset= ms_setting.distr[i].key_offset;
+ c->item_win[i].value_size= (int)ms_setting.distr[i].value_size;
+ c->item_win[i].value_offset= INVALID_OFFSET; /* default in invalid offset */
+ c->item_win[i].client_time= 0;
+
+ /* set expire time base on the proportion */
+ if (exp_cnt < ms_setting.exp_ver_per * i)
+ {
+ c->item_win[i].exp_time= FIXED_EXPIRE_TIME;
+ exp_cnt++;
+ }
+ else
+ {
+ c->item_win[i].exp_time= 0;
+ }
+ }
+
+ ms_warmup_num_init(c);
+
+ return EXIT_SUCCESS;
+} /* ms_item_win_init */
+
+
+/**
+ * each connection structure can include one or more sock
+ * handlers. this function create these socks and connect the
+ * server(s).
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_conn_sock_init(ms_conn_t *c)
+{
+ ms_thread_t *ms_thread= pthread_getspecific(ms_thread_key);
+ uint32_t i;
+ int ret_sfd;
+ uint32_t srv_idx= 0;
+
+ assert(c != NULL);
+ assert(c->tcpsfd != NULL);
+
+ for (i= 0; i < c->total_sfds; i++)
+ {
+ ret_sfd= 0;
+ if (ms_setting.rep_write_srv > 0)
+ {
+ /* for replication, each connection need connect all the server */
+ srv_idx= i % ms_setting.srv_cnt;
+ }
+ else
+ {
+ /* all the connections in a thread connects the same server */
+ srv_idx= ms_thread->thread_ctx->srv_idx;
+ }
+
+ if (ms_network_connect(c, ms_setting.servers[srv_idx].srv_host_name,
+ ms_setting.servers[srv_idx].srv_port,
+ ms_setting.udp, &ret_sfd) != 0)
+ {
+ break;
+ }
+
+ if (i == 0)
+ {
+ c->sfd= ret_sfd;
+ }
+
+ if (! ms_setting.udp)
+ {
+ c->tcpsfd[i]= ret_sfd;
+ }
+
+ c->alive_sfds++;
+ }
+
+ /* initialize udp sock handler if necessary */
+ if (ms_setting.facebook_test)
+ {
+ ret_sfd= 0;
+ if (ms_network_connect(c, ms_setting.servers[srv_idx].srv_host_name,
+ ms_setting.servers[srv_idx].srv_port,
+ true, &ret_sfd) != 0)
+ {
+ c->udpsfd= 0;
+ }
+ else
+ {
+ c->udpsfd= ret_sfd;
+ }
+ }
+
+ if ((i != c->total_sfds) || (ms_setting.facebook_test && (c->udpsfd == 0)))
+ {
+ if (ms_setting.udp)
+ {
+ close(c->sfd);
+ }
+ else
+ {
+ for (uint32_t j= 0; j < i; j++)
+ {
+ close(c->tcpsfd[j]);
+ }
+ }
+
+ if (c->udpsfd != 0)
+ {
+ close(c->udpsfd);
+ }
+
+ return -1;
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_conn_sock_init */
+
+
+/**
+ * each connection is managed by libevent, this function
+ * initialize the event of the connection structure.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_conn_event_init(ms_conn_t *c)
+{
+ ms_thread_t *ms_thread= pthread_getspecific(ms_thread_key);
+ short event_flags= EV_WRITE | EV_PERSIST;
+
+ event_set(&c->event, c->sfd, event_flags, ms_event_handler, (void *)c);
+ event_base_set(ms_thread->base, &c->event);
+ c->ev_flags= event_flags;
+
+ if (event_add(&c->event, NULL) == -1)
+ {
+ return -1;
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_conn_event_init */
+
+
+/**
+ * setup a connection, each connection structure of each
+ * thread must call this function to initialize.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+int ms_setup_conn(ms_conn_t *c)
+{
+ if (ms_item_win_init(c) != 0)
+ {
+ return -1;
+ }
+
+ if (ms_conn_init(c, conn_write, DATA_BUFFER_SIZE, ms_setting.udp) != 0)
+ {
+ return -1;
+ }
+
+ if (ms_conn_sock_init(c) != 0)
+ {
+ return -1;
+ }
+
+ if (ms_conn_event_init(c) != 0)
+ {
+ return -1;
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_setup_conn */
+
+
+/**
+ * Frees a connection.
+ *
+ * @param c, pointer of the concurrency
+ */
+void ms_conn_free(ms_conn_t *c)
+{
+ ms_thread_t *ms_thread= pthread_getspecific(ms_thread_key);
+ if (c != NULL)
+ {
+ if (c->hdrbuf != NULL)
+ free(c->hdrbuf);
+ if (c->msglist != NULL)
+ free(c->msglist);
+ if (c->rbuf != NULL)
+ free(c->rbuf);
+ if (c->wbuf != NULL)
+ free(c->wbuf);
+ if (c->iov != NULL)
+ free(c->iov);
+ if (c->mlget_task.mlget_item != NULL)
+ free(c->mlget_task.mlget_item);
+ if (c->rudpbuf != NULL)
+ free(c->rudpbuf);
+ if (c->udppkt != NULL)
+ free(c->udppkt);
+ if (c->item_win != NULL)
+ free(c->item_win);
+ if (c->tcpsfd != NULL)
+ free(c->tcpsfd);
+
+ if (--ms_thread->nactive_conn == 0)
+ {
+ free(ms_thread->conn);
+ }
+ }
+} /* ms_conn_free */
+
+
+/**
+ * close a connection
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_conn_close(ms_conn_t *c)
+{
+ ms_thread_t *ms_thread= pthread_getspecific(ms_thread_key);
+ assert(c != NULL);
+
+ /* delete the event, the socket and the connection */
+ event_del(&c->event);
+
+ for (uint32_t i= 0; i < c->total_sfds; i++)
+ {
+ if (c->tcpsfd[i] > 0)
+ {
+ close(c->tcpsfd[i]);
+ }
+ }
+ c->sfd= 0;
+
+ if (ms_setting.facebook_test)
+ {
+ close(c->udpsfd);
+ }
+
+ atomic_dec_32(&ms_stats.active_conns);
+
+ ms_conn_free(c);
+
+ if (ms_setting.run_time == 0)
+ {
+ pthread_mutex_lock(&ms_global.run_lock.lock);
+ ms_global.run_lock.count++;
+ pthread_cond_signal(&ms_global.run_lock.cond);
+ pthread_mutex_unlock(&ms_global.run_lock.lock);
+ }
+
+ if (ms_thread->nactive_conn == 0)
+ {
+ pthread_exit(NULL);
+ }
+} /* ms_conn_close */
+
+
+/**
+ * create a new sock
+ *
+ * @param ai, server address information
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_new_socket(struct addrinfo *ai)
+{
+ int sfd;
+
+ if ((sfd= socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol)) == -1)
+ {
+ fprintf(stderr, "socket() error: %s.\n", strerror(errno));
+ return -1;
+ }
+
+ return sfd;
+} /* ms_new_socket */
+
+
+/**
+ * Sets a socket's send buffer size to the maximum allowed by the system.
+ *
+ * @param sfd, file descriptor of socket
+ */
+static void ms_maximize_sndbuf(const int sfd)
+{
+ socklen_t intsize= sizeof(int);
+ unsigned int last_good= 0;
+ unsigned int min, max, avg;
+ unsigned int old_size;
+
+ /* Start with the default size. */
+ if (getsockopt(sfd, SOL_SOCKET, SO_SNDBUF, &old_size, &intsize) != 0)
+ {
+ fprintf(stderr, "getsockopt(SO_SNDBUF)\n");
+ return;
+ }
+
+ /* Binary-search for the real maximum. */
+ min= old_size;
+ max= MAX_SENDBUF_SIZE;
+
+ while (min <= max)
+ {
+ avg= ((unsigned int)(min + max)) / 2;
+ if (setsockopt(sfd, SOL_SOCKET, SO_SNDBUF, (void *)&avg, intsize) == 0)
+ {
+ last_good= avg;
+ min= avg + 1;
+ }
+ else
+ {
+ max= avg - 1;
+ }
+ }
+ (void)last_good;
+} /* ms_maximize_sndbuf */
+
+
+/**
+ * socket connects the server
+ *
+ * @param c, pointer of the concurrency
+ * @param srv_host_name, the host name of the server
+ * @param srv_port, port of server
+ * @param is_udp, whether it's udp
+ * @param ret_sfd, the connected socket file descriptor
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_network_connect(ms_conn_t *c,
+ char *srv_host_name,
+ const int srv_port,
+ const bool is_udp,
+ int *ret_sfd)
+{
+ int sfd;
+ struct linger ling=
+ {
+ 0, 0
+ };
+ struct addrinfo *ai;
+ struct addrinfo *next;
+ struct addrinfo hints;
+ char port_buf[NI_MAXSERV];
+ int error;
+ int success= 0;
+
+ int flags= 1;
+
+ /*
+ * the memset call clears nonstandard fields in some impementations
+ * that otherwise mess things up.
+ */
+ memset(&hints, 0, sizeof(hints));
+#ifdef AI_ADDRCONFIG
+ hints.ai_flags= AI_PASSIVE | AI_ADDRCONFIG;
+#else
+ hints.ai_flags= AI_PASSIVE;
+#endif /* AI_ADDRCONFIG */
+ if (is_udp)
+ {
+ hints.ai_protocol= IPPROTO_UDP;
+ hints.ai_socktype= SOCK_DGRAM;
+ hints.ai_family= AF_INET; /* This left here because of issues with OSX 10.5 */
+ }
+ else
+ {
+ hints.ai_family= AF_UNSPEC;
+ hints.ai_protocol= IPPROTO_TCP;
+ hints.ai_socktype= SOCK_STREAM;
+ }
+
+ snprintf(port_buf, NI_MAXSERV, "%d", srv_port);
+ error= getaddrinfo(srv_host_name, port_buf, &hints, &ai);
+ if (error != 0)
+ {
+ if (error != EAI_SYSTEM)
+ fprintf(stderr, "getaddrinfo(): %s.\n", gai_strerror(error));
+ else
+ perror("getaddrinfo()\n");
+
+ return -1;
+ }
+
+ for (next= ai; next; next= next->ai_next)
+ {
+ if ((sfd= ms_new_socket(next)) == -1)
+ {
+ freeaddrinfo(ai);
+ return -1;
+ }
+
+ setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, (void *)&flags, sizeof(flags));
+ if (is_udp)
+ {
+ ms_maximize_sndbuf(sfd);
+ }
+ else
+ {
+ setsockopt(sfd, SOL_SOCKET, SO_KEEPALIVE, (void *)&flags,
+ sizeof(flags));
+ setsockopt(sfd, SOL_SOCKET, SO_LINGER, (void *)&ling, sizeof(ling));
+ setsockopt(sfd, IPPROTO_TCP, TCP_NODELAY, (void *)&flags,
+ sizeof(flags));
+ }
+
+ if (is_udp)
+ {
+ c->srv_recv_addr_size= sizeof(struct sockaddr);
+ memcpy(&c->srv_recv_addr, next->ai_addr, c->srv_recv_addr_size);
+ }
+ else
+ {
+ if (connect(sfd, next->ai_addr, next->ai_addrlen) == -1)
+ {
+ close(sfd);
+ freeaddrinfo(ai);
+ return -1;
+ }
+ }
+
+ if (((flags= fcntl(sfd, F_GETFL, 0)) < 0)
+ || (fcntl(sfd, F_SETFL, flags | O_NONBLOCK) < 0))
+ {
+ fprintf(stderr, "setting O_NONBLOCK\n");
+ close(sfd);
+ freeaddrinfo(ai);
+ return -1;
+ }
+
+ if (ret_sfd != NULL)
+ {
+ *ret_sfd= sfd;
+ }
+
+ success++;
+ }
+
+ freeaddrinfo(ai);
+
+ /* Return zero if we detected no errors in starting up connections */
+ return success == 0;
+} /* ms_network_connect */
+
+
+/**
+ * reconnect a disconnected sock
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_reconn(ms_conn_t *c)
+{
+ ms_thread_t *ms_thread= pthread_getspecific(ms_thread_key);
+ uint32_t srv_idx= 0;
+ uint32_t srv_conn_cnt= 0;
+
+ if (ms_setting.rep_write_srv > 0)
+ {
+ srv_idx= c->cur_idx % ms_setting.srv_cnt;
+ srv_conn_cnt= ms_setting.sock_per_conn * ms_setting.nconns;
+ }
+ else
+ {
+ srv_idx= ms_thread->thread_ctx->srv_idx;
+ srv_conn_cnt= ms_setting.nconns / ms_setting.srv_cnt;
+ }
+
+ /* close the old socket handler */
+ close(c->sfd);
+ c->tcpsfd[c->cur_idx]= 0;
+
+ if (atomic_add_32_nv(&ms_setting.servers[srv_idx].disconn_cnt, 1)
+ % srv_conn_cnt == 0)
+ {
+ gettimeofday(&ms_setting.servers[srv_idx].disconn_time, NULL);
+ fprintf(stderr, "Server %s:%d disconnect\n",
+ ms_setting.servers[srv_idx].srv_host_name,
+ ms_setting.servers[srv_idx].srv_port);
+ }
+
+ if (ms_setting.rep_write_srv > 0)
+ {
+ uint32_t i= 0;
+
+ for (i= 0; i < c->total_sfds; i++)
+ {
+ if (c->tcpsfd[i] != 0)
+ {
+ break;
+ }
+ }
+
+ /* all socks disconnect */
+ if (i == c->total_sfds)
+ {
+ return -1;
+ }
+ }
+ else
+ {
+ do
+ {
+ /* reconnect success, break the loop */
+ if (ms_network_connect(c, ms_setting.servers[srv_idx].srv_host_name,
+ ms_setting.servers[srv_idx].srv_port,
+ ms_setting.udp, &c->sfd) == 0)
+ {
+ c->tcpsfd[c->cur_idx]= c->sfd;
+ if (atomic_add_32_nv(&ms_setting.servers[srv_idx].reconn_cnt, 1)
+ % (uint32_t)srv_conn_cnt == 0)
+ {
+ gettimeofday(&ms_setting.servers[srv_idx].reconn_time, NULL);
+ int reconn_time=
+ (int)(ms_setting.servers[srv_idx].reconn_time.tv_sec
+ - ms_setting.servers[srv_idx].disconn_time
+ .tv_sec);
+ fprintf(stderr, "Server %s:%d reconnect after %ds\n",
+ ms_setting.servers[srv_idx].srv_host_name,
+ ms_setting.servers[srv_idx].srv_port, reconn_time);
+ }
+ break;
+ }
+
+ if (ms_setting.rep_write_srv == 0 && c->total_sfds > 0)
+ {
+ /* wait a second and reconnect */
+ sleep(1);
+ }
+ }
+ while (ms_setting.rep_write_srv == 0 && c->total_sfds > 0);
+ }
+
+ if ((c->total_sfds > 1) && (c->tcpsfd[c->cur_idx] == 0))
+ {
+ c->sfd= 0;
+ c->alive_sfds--;
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_reconn */
+
+
+/**
+ * reconnect several disconnected socks in the connection
+ * structure, the ever-1-second timer of the thread will check
+ * whether some socks in the connections disconnect. if
+ * disconnect, reconnect the sock.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+int ms_reconn_socks(ms_conn_t *c)
+{
+ ms_thread_t *ms_thread= pthread_getspecific(ms_thread_key);
+ uint32_t srv_idx= 0;
+ int ret_sfd= 0;
+ uint32_t srv_conn_cnt= 0;
+ struct timeval cur_time;
+
+ assert(c != NULL);
+
+ if ((c->total_sfds == 1) || (c->total_sfds == c->alive_sfds))
+ {
+ return EXIT_SUCCESS;
+ }
+
+ for (uint32_t i= 0; i < c->total_sfds; i++)
+ {
+ if (c->tcpsfd[i] == 0)
+ {
+ gettimeofday(&cur_time, NULL);
+
+ /**
+ * For failover test of replication, reconnect the socks after
+ * it disconnects more than 5 seconds, Otherwise memslap will
+ * block at connect() function and the work threads can't work
+ * in this interval.
+ */
+ if (cur_time.tv_sec
+ - ms_setting.servers[srv_idx].disconn_time.tv_sec < 5)
+ {
+ break;
+ }
+
+ if (ms_setting.rep_write_srv > 0)
+ {
+ srv_idx= i % ms_setting.srv_cnt;
+ srv_conn_cnt= ms_setting.sock_per_conn * ms_setting.nconns;
+ }
+ else
+ {
+ srv_idx= ms_thread->thread_ctx->srv_idx;
+ srv_conn_cnt= ms_setting.nconns / ms_setting.srv_cnt;
+ }
+
+ if (ms_network_connect(c, ms_setting.servers[srv_idx].srv_host_name,
+ ms_setting.servers[srv_idx].srv_port,
+ ms_setting.udp, &ret_sfd) == 0)
+ {
+ c->tcpsfd[i]= ret_sfd;
+ c->alive_sfds++;
+
+ if (atomic_add_32_nv(&ms_setting.servers[srv_idx].reconn_cnt, 1)
+ % (uint32_t)srv_conn_cnt == 0)
+ {
+ gettimeofday(&ms_setting.servers[srv_idx].reconn_time, NULL);
+ int reconn_time=
+ (int)(ms_setting.servers[srv_idx].reconn_time.tv_sec
+ - ms_setting.servers[srv_idx].disconn_time
+ .tv_sec);
+ fprintf(stderr, "Server %s:%d reconnect after %ds\n",
+ ms_setting.servers[srv_idx].srv_host_name,
+ ms_setting.servers[srv_idx].srv_port, reconn_time);
+ }
+ }
+ }
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_reconn_socks */
+
+
+/**
+ * Tokenize the command string by replacing whitespace with '\0' and update
+ * the token array tokens with pointer to start of each token and length.
+ * Returns total number of tokens. The last valid token is the terminal
+ * token (value points to the first unprocessed character of the string and
+ * length zero).
+ *
+ * Usage example:
+ *
+ * while(ms_tokenize_command(command, ncommand, tokens, max_tokens) > 0) {
+ * for(int ix = 0; tokens[ix].length != 0; ix++) {
+ * ...
+ * }
+ * ncommand = tokens[ix].value - command;
+ * command = tokens[ix].value;
+ * }
+ *
+ * @param command, the command string to token
+ * @param tokens, array to store tokens
+ * @param max_tokens, maximum tokens number
+ *
+ * @return int, the number of tokens
+ */
+static int ms_tokenize_command(char *command,
+ token_t *tokens,
+ const int max_tokens)
+{
+ char *s, *e;
+ int ntokens= 0;
+
+ assert(command != NULL && tokens != NULL && max_tokens > 1);
+
+ for (s= e= command; ntokens < max_tokens - 1; ++e)
+ {
+ if (*e == ' ')
+ {
+ if (s != e)
+ {
+ tokens[ntokens].value= s;
+ tokens[ntokens].length= (size_t)(e - s);
+ ntokens++;
+ *e= '\0';
+ }
+ s= e + 1;
+ }
+ else if (*e == '\0')
+ {
+ if (s != e)
+ {
+ tokens[ntokens].value= s;
+ tokens[ntokens].length= (size_t)(e - s);
+ ntokens++;
+ }
+
+ break; /* string end */
+ }
+ }
+
+ return ntokens;
+} /* ms_tokenize_command */
+
+
+/**
+ * parse the response of server.
+ *
+ * @param c, pointer of the concurrency
+ * @param command, the string responded by server
+ *
+ * @return int, if the command completed return EXIT_SUCCESS, else return
+ * -1
+ */
+static int ms_ascii_process_line(ms_conn_t *c, char *command)
+{
+ int ret= 0;
+ int64_t value_len;
+ char *buffer= command;
+
+ assert(c != NULL);
+
+ /**
+ * for command get, we store the returned value into local buffer
+ * then continue in ms_complete_nread().
+ */
+
+ switch (buffer[0])
+ {
+ case 'V': /* VALUE || VERSION */
+ if (buffer[1] == 'A') /* VALUE */
+ {
+ token_t tokens[MAX_TOKENS];
+ ms_tokenize_command(command, tokens, MAX_TOKENS);
+ errno= 0;
+ value_len= strtol(tokens[VALUELEN_TOKEN].value, NULL, 10);
+ if (errno != 0)
+ {
+ printf("<%d ERROR %s\n", c->sfd, strerror(errno));
+ }
+ c->currcmd.key_prefix= *(uint64_t *)tokens[KEY_TOKEN].value;
+
+ /*
+ * We read the \r\n into the string since not doing so is more
+ * cycles then the waster of memory to do so.
+ *
+ * We are null terminating through, which will most likely make
+ * some people lazy about using the return length.
+ */
+ c->rvbytes= (int)(value_len + 2);
+ c->readval= true;
+ ret= -1;
+ }
+
+ break;
+
+ case 'O': /* OK */
+ c->currcmd.retstat= MCD_SUCCESS;
+ break;
+
+ case 'S': /* STORED STATS SERVER_ERROR */
+ if (buffer[2] == 'A') /* STORED STATS */
+ { /* STATS*/
+ c->currcmd.retstat= MCD_STAT;
+ }
+ else if (buffer[1] == 'E')
+ {
+ /* SERVER_ERROR */
+ printf("<%d %s\n", c->sfd, buffer);
+
+ c->currcmd.retstat= MCD_SERVER_ERROR;
+ }
+ else if (buffer[1] == 'T')
+ {
+ /* STORED */
+ c->currcmd.retstat= MCD_STORED;
+ }
+ else
+ {
+ c->currcmd.retstat= MCD_UNKNOWN_READ_FAILURE;
+ }
+ break;
+
+ case 'D': /* DELETED DATA */
+ if (buffer[1] == 'E')
+ {
+ c->currcmd.retstat= MCD_DELETED;
+ }
+ else
+ {
+ c->currcmd.retstat= MCD_UNKNOWN_READ_FAILURE;
+ }
+
+ break;
+
+ case 'N': /* NOT_FOUND NOT_STORED*/
+ if (buffer[4] == 'F')
+ {
+ c->currcmd.retstat= MCD_NOTFOUND;
+ }
+ else if (buffer[4] == 'S')
+ {
+ printf("<%d %s\n", c->sfd, buffer);
+ c->currcmd.retstat= MCD_NOTSTORED;
+ }
+ else
+ {
+ c->currcmd.retstat= MCD_UNKNOWN_READ_FAILURE;
+ }
+ break;
+
+ case 'E': /* PROTOCOL ERROR or END */
+ if (buffer[1] == 'N')
+ {
+ /* END */
+ c->currcmd.retstat= MCD_END;
+ }
+ else if (buffer[1] == 'R')
+ {
+ printf("<%d ERROR\n", c->sfd);
+ c->currcmd.retstat= MCD_PROTOCOL_ERROR;
+ }
+ else if (buffer[1] == 'X')
+ {
+ c->currcmd.retstat= MCD_DATA_EXISTS;
+ printf("<%d %s\n", c->sfd, buffer);
+ }
+ else
+ {
+ c->currcmd.retstat= MCD_UNKNOWN_READ_FAILURE;
+ }
+ break;
+
+ case 'C': /* CLIENT ERROR */
+ printf("<%d %s\n", c->sfd, buffer);
+ c->currcmd.retstat= MCD_CLIENT_ERROR;
+ break;
+
+ default:
+ c->currcmd.retstat= MCD_UNKNOWN_READ_FAILURE;
+ break;
+ } /* switch */
+
+ return ret;
+} /* ms_ascii_process_line */
+
+
+/**
+ * after one operation completes, reset the concurrency
+ *
+ * @param c, pointer of the concurrency
+ * @param timeout, whether it's timeout
+ */
+void ms_reset_conn(ms_conn_t *c, bool timeout)
+{
+ assert(c != NULL);
+
+ if (c->udp)
+ {
+ if ((c->packets > 0) && (c->packets < MAX_UDP_PACKET))
+ {
+ memset(c->udppkt, 0, sizeof(ms_udppkt_t) * (size_t)c->packets);
+ }
+
+ c->packets= 0;
+ c->recvpkt= 0;
+ c->pktcurr= 0;
+ c->ordcurr= 0;
+ c->rudpbytes= 0;
+ }
+ c->currcmd.isfinish= true;
+ c->ctnwrite= false;
+ c->rbytes= 0;
+ c->rcurr= c->rbuf;
+ c->msgcurr = 0;
+ c->msgused = 0;
+ c->iovused = 0;
+ ms_conn_set_state(c, conn_write);
+ memcpy(&c->precmd, &c->currcmd, sizeof(ms_cmdstat_t)); /* replicate command state */
+
+ if (timeout)
+ {
+ ms_drive_machine(c);
+ }
+} /* ms_reset_conn */
+
+
+/**
+ * if we have a complete line in the buffer, process it.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_try_read_line(ms_conn_t *c)
+{
+ if (c->protocol == binary_prot)
+ {
+ /* Do we have the complete packet header? */
+ if ((uint64_t)c->rbytes < sizeof(c->binary_header))
+ {
+ /* need more data! */
+ return EXIT_SUCCESS;
+ }
+ else
+ {
+#ifdef NEED_ALIGN
+ if (((long)(c->rcurr)) % 8 != 0)
+ {
+ /* must realign input buffer */
+ memmove(c->rbuf, c->rcurr, c->rbytes);
+ c->rcurr= c->rbuf;
+ if (settings.verbose)
+ {
+ fprintf(stderr, "%d: Realign input buffer.\n", c->sfd);
+ }
+ }
+#endif
+ protocol_binary_response_header *rsp;
+ rsp= (protocol_binary_response_header *)c->rcurr;
+
+ c->binary_header= *rsp;
+ c->binary_header.response.extlen= rsp->response.extlen;
+ c->binary_header.response.keylen= ntohs(rsp->response.keylen);
+ c->binary_header.response.bodylen= ntohl(rsp->response.bodylen);
+ c->binary_header.response.status= ntohs(rsp->response.status);
+
+ if (c->binary_header.response.magic != PROTOCOL_BINARY_RES)
+ {
+ fprintf(stderr, "Invalid magic: %x\n",
+ c->binary_header.response.magic);
+ ms_conn_set_state(c, conn_closing);
+ return EXIT_SUCCESS;
+ }
+
+ /* process this complete response */
+ if (ms_bin_process_response(c) == 0)
+ {
+ /* current operation completed */
+ ms_reset_conn(c, false);
+ return -1;
+ }
+ else
+ {
+ c->rbytes-= (int32_t)sizeof(c->binary_header);
+ c->rcurr+= sizeof(c->binary_header);
+ }
+ }
+ }
+ else
+ {
+ char *el, *cont;
+
+ assert(c != NULL);
+ assert(c->rcurr <= (c->rbuf + c->rsize));
+
+ if (c->rbytes == 0)
+ return EXIT_SUCCESS;
+
+ el= memchr(c->rcurr, '\n', (size_t)c->rbytes);
+ if (! el)
+ return EXIT_SUCCESS;
+
+ cont= el + 1;
+ if (((el - c->rcurr) > 1) && (*(el - 1) == '\r'))
+ {
+ el--;
+ }
+ *el= '\0';
+
+ assert(cont <= (c->rcurr + c->rbytes));
+
+ /* process this complete line */
+ if (ms_ascii_process_line(c, c->rcurr) == 0)
+ {
+ /* current operation completed */
+ ms_reset_conn(c, false);
+ return -1;
+ }
+ else
+ {
+ /* current operation didn't complete */
+ c->rbytes-= (int32_t)(cont - c->rcurr);
+ c->rcurr= cont;
+ }
+
+ assert(c->rcurr <= (c->rbuf + c->rsize));
+ }
+
+ return -1;
+} /* ms_try_read_line */
+
+
+/**
+ * because the packet of UDP can't ensure the order, the
+ * function is used to sort the received udp packet.
+ *
+ * @param c, pointer of the concurrency
+ * @param buf, the buffer to store the ordered packages data
+ * @param rbytes, the maximum capacity of the buffer
+ *
+ * @return int, if success, return the copy bytes, else return
+ * -1
+ */
+static int ms_sort_udp_packet(ms_conn_t *c, char *buf, int rbytes)
+{
+ int len= 0;
+ int wbytes= 0;
+ uint16_t req_id= 0;
+ uint16_t seq_num= 0;
+ uint16_t packets= 0;
+ unsigned char *header= NULL;
+
+ /* no enough data */
+ assert(c != NULL);
+ assert(buf != NULL);
+ assert(c->rudpbytes >= UDP_HEADER_SIZE);
+
+ /* calculate received packets count */
+ if (c->rudpbytes % UDP_MAX_PAYLOAD_SIZE >= UDP_HEADER_SIZE)
+ {
+ /* the last packet has some data */
+ c->recvpkt= c->rudpbytes / UDP_MAX_PAYLOAD_SIZE + 1;
+ }
+ else
+ {
+ c->recvpkt= c->rudpbytes / UDP_MAX_PAYLOAD_SIZE;
+ }
+
+ /* get the total packets count if necessary */
+ if (c->packets == 0)
+ {
+ c->packets= HEADER_TO_PACKETS((unsigned char *)c->rudpbuf);
+ }
+
+ /* build the ordered packet array */
+ for (int i= c->pktcurr; i < c->recvpkt; i++)
+ {
+ header= (unsigned char *)c->rudpbuf + i * UDP_MAX_PAYLOAD_SIZE;
+ req_id= (uint16_t)HEADER_TO_REQID(header);
+ assert(req_id == c->request_id % (1 << 16));
+
+ packets= (uint16_t)HEADER_TO_PACKETS(header);
+ assert(c->packets == HEADER_TO_PACKETS(header));
+
+ seq_num= (uint16_t)HEADER_TO_SEQNUM(header);
+ c->udppkt[seq_num].header= header;
+ c->udppkt[seq_num].data= (char *)header + UDP_HEADER_SIZE;
+
+ if (i == c->recvpkt - 1)
+ {
+ /* last received packet */
+ if (c->rudpbytes % UDP_MAX_PAYLOAD_SIZE == 0)
+ {
+ c->udppkt[seq_num].rbytes= UDP_MAX_PAYLOAD_SIZE - UDP_HEADER_SIZE;
+ c->pktcurr++;
+ }
+ else
+ {
+ c->udppkt[seq_num].rbytes= c->rudpbytes % UDP_MAX_PAYLOAD_SIZE
+ - UDP_HEADER_SIZE;
+ }
+ }
+ else
+ {
+ c->udppkt[seq_num].rbytes= UDP_MAX_PAYLOAD_SIZE - UDP_HEADER_SIZE;
+ c->pktcurr++;
+ }
+ }
+
+ for (int i= c->ordcurr; i < c->recvpkt; i++)
+ {
+ /* there is some data to copy */
+ if ((c->udppkt[i].data != NULL)
+ && (c->udppkt[i].copybytes < c->udppkt[i].rbytes))
+ {
+ header= c->udppkt[i].header;
+ len= c->udppkt[i].rbytes - c->udppkt[i].copybytes;
+ if (len > rbytes - wbytes)
+ {
+ len= rbytes - wbytes;
+ }
+
+ assert(len <= rbytes - wbytes);
+ assert(i == HEADER_TO_SEQNUM(header));
+
+ memcpy(buf + wbytes, c->udppkt[i].data + c->udppkt[i].copybytes,
+ (size_t)len);
+ wbytes+= len;
+ c->udppkt[i].copybytes+= len;
+
+ if ((c->udppkt[i].copybytes == c->udppkt[i].rbytes)
+ && (c->udppkt[i].rbytes == UDP_MAX_PAYLOAD_SIZE - UDP_HEADER_SIZE))
+ {
+ /* finish copying all the data of this packet, next */
+ c->ordcurr++;
+ }
+
+ /* last received packet, and finish copying all the data */
+ if ((c->recvpkt == c->packets) && (i == c->recvpkt - 1)
+ && (c->udppkt[i].copybytes == c->udppkt[i].rbytes))
+ {
+ break;
+ }
+
+ /* no space to copy data */
+ if (wbytes >= rbytes)
+ {
+ break;
+ }
+
+ /* it doesn't finish reading all the data of the packet from network */
+ if ((i != c->recvpkt - 1)
+ && (c->udppkt[i].rbytes < UDP_MAX_PAYLOAD_SIZE - UDP_HEADER_SIZE))
+ {
+ break;
+ }
+ }
+ else
+ {
+ /* no data to copy */
+ break;
+ }
+ }
+ (void)packets;
+
+ return wbytes == 0 ? -1 : wbytes;
+} /* ms_sort_udp_packet */
+
+
+/**
+ * encapsulate upd read like tcp read
+ *
+ * @param c, pointer of the concurrency
+ * @param buf, read buffer
+ * @param len, length to read
+ *
+ * @return int, if success, return the read bytes, else return
+ * -1
+ */
+static int ms_udp_read(ms_conn_t *c, char *buf, int len)
+{
+ int res= 0;
+ int avail= 0;
+ int rbytes= 0;
+ int copybytes= 0;
+
+ assert(c->udp);
+
+ while (1)
+ {
+ if (c->rudpbytes + UDP_MAX_PAYLOAD_SIZE > c->rudpsize)
+ {
+ char *new_rbuf= realloc(c->rudpbuf, (size_t)c->rudpsize * 2);
+ if (! new_rbuf)
+ {
+ fprintf(stderr, "Couldn't realloc input buffer.\n");
+ c->rudpbytes= 0; /* ignore what we read */
+ return -1;
+ }
+ c->rudpbuf= new_rbuf;
+ c->rudpsize*= 2;
+ }
+
+ avail= c->rudpsize - c->rudpbytes;
+ /* UDP each time read a packet, 1400 bytes */
+ res= (int)read(c->sfd, c->rudpbuf + c->rudpbytes, (size_t)avail);
+
+ if (res > 0)
+ {
+ atomic_add_size(&ms_stats.bytes_read, res);
+ c->rudpbytes+= res;
+ rbytes+= res;
+ if (res == avail)
+ {
+ continue;
+ }
+ else
+ {
+ break;
+ }
+ }
+
+ if (res == 0)
+ {
+ /* "connection" closed */
+ return res;
+ }
+
+ if (res == -1)
+ {
+ /* no data to read */
+ return res;
+ }
+ }
+
+ /* copy data to read buffer */
+ if (rbytes > 0)
+ {
+ copybytes= ms_sort_udp_packet(c, buf, len);
+ }
+
+ if (copybytes == -1)
+ {
+ atomic_add_size(&ms_stats.pkt_disorder, 1);
+ }
+
+ return copybytes;
+} /* ms_udp_read */
+
+
+/*
+ * read from network as much as we can, handle buffer overflow and connection
+ * close.
+ * before reading, move the remaining incomplete fragment of a command
+ * (if any) to the beginning of the buffer.
+ * return EXIT_SUCCESS if there's nothing to read on the first read.
+ */
+
+/**
+ * read from network as much as we can, handle buffer overflow and connection
+ * close. before reading, move the remaining incomplete fragment of a command
+ * (if any) to the beginning of the buffer.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int,
+ * return EXIT_SUCCESS if there's nothing to read on the first read.
+ * return EXIT_FAILURE if get data
+ * return -1 if error happens
+ */
+static int ms_try_read_network(ms_conn_t *c)
+{
+ int gotdata= 0;
+ int res;
+ int64_t avail;
+
+ assert(c != NULL);
+
+ if ((c->rcurr != c->rbuf)
+ && (! c->readval || (c->rvbytes > c->rsize - (c->rcurr - c->rbuf))
+ || (c->readval && (c->rcurr - c->rbuf > c->rbytes))))
+ {
+ if (c->rbytes != 0) /* otherwise there's nothing to copy */
+ memmove(c->rbuf, c->rcurr, (size_t)c->rbytes);
+ c->rcurr= c->rbuf;
+ }
+
+ while (1)
+ {
+ if (c->rbytes >= c->rsize)
+ {
+ char *new_rbuf= realloc(c->rbuf, (size_t)c->rsize * 2);
+ if (! new_rbuf)
+ {
+ fprintf(stderr, "Couldn't realloc input buffer.\n");
+ c->rbytes= 0; /* ignore what we read */
+ return -1;
+ }
+ c->rcurr= c->rbuf= new_rbuf;
+ c->rsize*= 2;
+ }
+
+ avail= c->rsize - c->rbytes - (c->rcurr - c->rbuf);
+ if (avail == 0)
+ {
+ break;
+ }
+
+ if (c->udp)
+ {
+ res= (int32_t)ms_udp_read(c, c->rcurr + c->rbytes, (int32_t)avail);
+ }
+ else
+ {
+ res= (int)read(c->sfd, c->rcurr + c->rbytes, (size_t)avail);
+ }
+
+ if (res > 0)
+ {
+ if (! c->udp)
+ {
+ atomic_add_size(&ms_stats.bytes_read, res);
+ }
+ gotdata= 1;
+ c->rbytes+= res;
+ if (res == avail)
+ {
+ continue;
+ }
+ else
+ {
+ break;
+ }
+ }
+ if (res == 0)
+ {
+ /* connection closed */
+ ms_conn_set_state(c, conn_closing);
+ return -1;
+ }
+ if (res == -1)
+ {
+ if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
+ break;
+ /* Should close on unhandled errors. */
+ ms_conn_set_state(c, conn_closing);
+ return -1;
+ }
+ }
+
+ return gotdata;
+} /* ms_try_read_network */
+
+
+/**
+ * after get the object from server, verify the value if
+ * necessary.
+ *
+ * @param c, pointer of the concurrency
+ * @param mlget_item, pointer of mulit-get task item structure
+ * @param value, received value string
+ * @param vlen, received value string length
+ */
+static void ms_verify_value(ms_conn_t *c,
+ ms_mlget_task_item_t *mlget_item,
+ char *value,
+ int vlen)
+{
+ if (c->curr_task.verify)
+ {
+ assert(c->curr_task.item->value_offset != INVALID_OFFSET);
+ char *orignval= &ms_setting.char_block[c->curr_task.item->value_offset];
+ char *orignkey=
+ &ms_setting.char_block[c->curr_task.item->key_suffix_offset];
+
+ /* verify expire time if necessary */
+ if (c->curr_task.item->exp_time > 0)
+ {
+ struct timeval curr_time;
+ gettimeofday(&curr_time, NULL);
+
+ /* object expired but get it now */
+ if (curr_time.tv_sec - c->curr_task.item->client_time
+ > c->curr_task.item->exp_time + EXPIRE_TIME_ERROR)
+ {
+ atomic_add_size(&ms_stats.exp_get, 1);
+
+ if (ms_setting.verbose)
+ {
+ char set_time[64];
+ char cur_time[64];
+ strftime(set_time, 64, "%Y-%m-%d %H:%M:%S",
+ localtime(&c->curr_task.item->client_time));
+ strftime(cur_time, 64, "%Y-%m-%d %H:%M:%S",
+ localtime(&curr_time.tv_sec));
+ fprintf(stderr,
+ "\n<%d expire time verification failed, "
+ "object expired but get it now\n"
+ "\tkey len: %d\n"
+ "\tkey: %" PRIx64 " %.*s\n"
+ "\tset time: %s current time: %s "
+ "diff time: %d expire time: %d\n"
+ "\texpected data: \n"
+ "\treceived data len: %d\n"
+ "\treceived data: %.*s\n",
+ c->sfd,
+ c->curr_task.item->key_size,
+ c->curr_task.item->key_prefix,
+ c->curr_task.item->key_size - (int)KEY_PREFIX_SIZE,
+ orignkey,
+ set_time,
+ cur_time,
+ (int)(curr_time.tv_sec - c->curr_task.item->client_time),
+ c->curr_task.item->exp_time,
+ vlen,
+ vlen,
+ value);
+ fflush(stderr);
+ }
+ }
+ }
+ else
+ {
+ if ((c->curr_task.item->value_size != vlen)
+ || (memcmp(orignval, value, (size_t)vlen) != 0))
+ {
+ atomic_add_size(&ms_stats.vef_failed, 1);
+
+ if (ms_setting.verbose)
+ {
+ fprintf(stderr,
+ "\n<%d data verification failed\n"
+ "\tkey len: %d\n"
+ "\tkey: %" PRIx64" %.*s\n"
+ "\texpected data len: %d\n"
+ "\texpected data: %.*s\n"
+ "\treceived data len: %d\n"
+ "\treceived data: %.*s\n",
+ c->sfd,
+ c->curr_task.item->key_size,
+ c->curr_task.item->key_prefix,
+ c->curr_task.item->key_size - (int)KEY_PREFIX_SIZE,
+ orignkey,
+ c->curr_task.item->value_size,
+ c->curr_task.item->value_size,
+ orignval,
+ vlen,
+ vlen,
+ value);
+ fflush(stderr);
+ }
+ }
+ }
+
+ c->curr_task.finish_verify= true;
+
+ if (mlget_item != NULL)
+ {
+ mlget_item->finish_verify= true;
+ }
+ }
+} /* ms_verify_value */
+
+
+/**
+ * For ASCII protocol, after store the data into the local
+ * buffer, run this function to handle the data.
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_ascii_complete_nread(ms_conn_t *c)
+{
+ assert(c != NULL);
+ assert(c->rbytes >= c->rvbytes);
+ assert(c->protocol == ascii_prot);
+ if (c->rvbytes > 2)
+ {
+ assert(
+ c->rcurr[c->rvbytes - 1] == '\n' && c->rcurr[c->rvbytes - 2] == '\r');
+ }
+
+ /* multi-get */
+ ms_mlget_task_item_t *mlget_item= NULL;
+ if (((ms_setting.mult_key_num > 1)
+ && (c->mlget_task.mlget_num >= ms_setting.mult_key_num))
+ || ((c->remain_exec_num == 0) && (c->mlget_task.mlget_num > 0)))
+ {
+ c->mlget_task.value_index++;
+ mlget_item= &c->mlget_task.mlget_item[c->mlget_task.value_index];
+
+ if (mlget_item->item->key_prefix == c->currcmd.key_prefix)
+ {
+ c->curr_task.item= mlget_item->item;
+ c->curr_task.verify= mlget_item->verify;
+ c->curr_task.finish_verify= mlget_item->finish_verify;
+ mlget_item->get_miss= false;
+ }
+ else
+ {
+ /* Try to find the task item in multi-get task array */
+ for (int i= 0; i < c->mlget_task.mlget_num; i++)
+ {
+ mlget_item= &c->mlget_task.mlget_item[i];
+ if (mlget_item->item->key_prefix == c->currcmd.key_prefix)
+ {
+ c->curr_task.item= mlget_item->item;
+ c->curr_task.verify= mlget_item->verify;
+ c->curr_task.finish_verify= mlget_item->finish_verify;
+ mlget_item->get_miss= false;
+
+ break;
+ }
+ }
+ }
+ }
+
+ ms_verify_value(c, mlget_item, c->rcurr, c->rvbytes - 2);
+
+ c->curr_task.get_miss= false;
+ c->rbytes-= c->rvbytes;
+ c->rcurr= c->rcurr + c->rvbytes;
+ assert(c->rcurr <= (c->rbuf + c->rsize));
+ c->readval= false;
+ c->rvbytes= 0;
+} /* ms_ascii_complete_nread */
+
+
+/**
+ * For binary protocol, after store the data into the local
+ * buffer, run this function to handle the data.
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_bin_complete_nread(ms_conn_t *c)
+{
+ assert(c != NULL);
+ assert(c->rbytes >= c->rvbytes);
+ assert(c->protocol == binary_prot);
+
+ int extlen= c->binary_header.response.extlen;
+ int keylen= c->binary_header.response.keylen;
+ uint8_t opcode= c->binary_header.response.opcode;
+
+ /* not get command or not include value, just return */
+ if (((opcode != PROTOCOL_BINARY_CMD_GET)
+ && (opcode != PROTOCOL_BINARY_CMD_GETQ))
+ || (c->rvbytes <= extlen + keylen))
+ {
+ /* get miss */
+ if (c->binary_header.response.opcode == PROTOCOL_BINARY_CMD_GET)
+ {
+ c->currcmd.retstat= MCD_END;
+ c->curr_task.get_miss= true;
+ }
+
+ c->readval= false;
+ c->rvbytes= 0;
+ ms_reset_conn(c, false);
+ return;
+ }
+
+ /* multi-get */
+ ms_mlget_task_item_t *mlget_item= NULL;
+ if (((ms_setting.mult_key_num > 1)
+ && (c->mlget_task.mlget_num >= ms_setting.mult_key_num))
+ || ((c->remain_exec_num == 0) && (c->mlget_task.mlget_num > 0)))
+ {
+ c->mlget_task.value_index++;
+ mlget_item= &c->mlget_task.mlget_item[c->mlget_task.value_index];
+
+ c->curr_task.item= mlget_item->item;
+ c->curr_task.verify= mlget_item->verify;
+ c->curr_task.finish_verify= mlget_item->finish_verify;
+ mlget_item->get_miss= false;
+ }
+
+ ms_verify_value(c,
+ mlget_item,
+ c->rcurr + extlen + keylen,
+ c->rvbytes - extlen - keylen);
+
+ c->currcmd.retstat= MCD_END;
+ c->curr_task.get_miss= false;
+ c->rbytes-= c->rvbytes;
+ c->rcurr= c->rcurr + c->rvbytes;
+ assert(c->rcurr <= (c->rbuf + c->rsize));
+ c->readval= false;
+ c->rvbytes= 0;
+
+ if (ms_setting.mult_key_num > 1)
+ {
+ /* multi-get have check all the item */
+ if (c->mlget_task.value_index == c->mlget_task.mlget_num - 1)
+ {
+ ms_reset_conn(c, false);
+ }
+ }
+ else
+ {
+ /* single get */
+ ms_reset_conn(c, false);
+ }
+} /* ms_bin_complete_nread */
+
+
+/**
+ * we get here after reading the value of get commands.
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_complete_nread(ms_conn_t *c)
+{
+ assert(c != NULL);
+ assert(c->rbytes >= c->rvbytes);
+ assert(c->protocol == ascii_prot
+ || c->protocol == binary_prot);
+
+ if (c->protocol == binary_prot)
+ {
+ ms_bin_complete_nread(c);
+ }
+ else
+ {
+ ms_ascii_complete_nread(c);
+ }
+} /* ms_complete_nread */
+
+
+/**
+ * Adds a message header to a connection.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_add_msghdr(ms_conn_t *c)
+{
+ struct msghdr *msg;
+
+ assert(c != NULL);
+
+ if (c->msgsize == c->msgused)
+ {
+ msg=
+ realloc(c->msglist, (size_t)c->msgsize * 2 * sizeof(struct msghdr));
+ if (! msg)
+ return -1;
+
+ c->msglist= msg;
+ c->msgsize*= 2;
+ }
+
+ msg= c->msglist + c->msgused;
+
+ /**
+ * this wipes msg_iovlen, msg_control, msg_controllen, and
+ * msg_flags, the last 3 of which aren't defined on solaris:
+ */
+ memset(msg, 0, sizeof(struct msghdr));
+
+ msg->msg_iov= &c->iov[c->iovused];
+
+ if (c->udp && (c->srv_recv_addr_size > 0))
+ {
+ msg->msg_name= &c->srv_recv_addr;
+ msg->msg_namelen= c->srv_recv_addr_size;
+ }
+
+ c->msgbytes= 0;
+ c->msgused++;
+
+ if (c->udp)
+ {
+ /* Leave room for the UDP header, which we'll fill in later. */
+ return ms_add_iov(c, NULL, UDP_HEADER_SIZE);
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_add_msghdr */
+
+
+/**
+ * Ensures that there is room for another structure iovec in a connection's
+ * iov list.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_ensure_iov_space(ms_conn_t *c)
+{
+ assert(c != NULL);
+
+ if (c->iovused >= c->iovsize)
+ {
+ int i, iovnum;
+ struct iovec *new_iov= (struct iovec *)realloc(c->iov,
+ ((size_t)c->iovsize
+ * 2)
+ * sizeof(struct iovec));
+ if (! new_iov)
+ return -1;
+
+ c->iov= new_iov;
+ c->iovsize*= 2;
+
+ /* Point all the msghdr structures at the new list. */
+ for (i= 0, iovnum= 0; i < c->msgused; i++)
+ {
+ c->msglist[i].msg_iov= &c->iov[iovnum];
+ iovnum+= (int)c->msglist[i].msg_iovlen;
+ }
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_ensure_iov_space */
+
+
+/**
+ * Adds data to the list of pending data that will be written out to a
+ * connection.
+ *
+ * @param c, pointer of the concurrency
+ * @param buf, the buffer includes data to send
+ * @param len, the data length in the buffer
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_add_iov(ms_conn_t *c, const void *buf, int len)
+{
+ struct msghdr *m;
+ int leftover;
+ bool limit_to_mtu;
+
+ assert(c != NULL);
+
+ do
+ {
+ m= &c->msglist[c->msgused - 1];
+
+ /*
+ * Limit UDP packets, to UDP_MAX_PAYLOAD_SIZE bytes.
+ */
+ limit_to_mtu= c->udp;
+
+#ifdef IOV_MAX
+ /* We may need to start a new msghdr if this one is full. */
+ if ((m->msg_iovlen == IOV_MAX)
+ || (limit_to_mtu && (c->msgbytes >= UDP_MAX_SEND_PAYLOAD_SIZE)))
+ {
+ ms_add_msghdr(c);
+ m= &c->msglist[c->msgused - 1];
+ }
+#endif
+
+ if (ms_ensure_iov_space(c) != 0)
+ return -1;
+
+ /* If the fragment is too big to fit in the datagram, split it up */
+ if (limit_to_mtu && (len + c->msgbytes > UDP_MAX_SEND_PAYLOAD_SIZE))
+ {
+ leftover= len + c->msgbytes - UDP_MAX_SEND_PAYLOAD_SIZE;
+ len-= leftover;
+ }
+ else
+ {
+ leftover= 0;
+ }
+
+ m= &c->msglist[c->msgused - 1];
+ m->msg_iov[m->msg_iovlen].iov_base= (void *)buf;
+ m->msg_iov[m->msg_iovlen].iov_len= (size_t)len;
+
+ c->msgbytes+= len;
+ c->iovused++;
+ m->msg_iovlen++;
+
+ buf= ((char *)buf) + len;
+ len= leftover;
+ }
+ while (leftover > 0);
+
+ return EXIT_SUCCESS;
+} /* ms_add_iov */
+
+
+/**
+ * Constructs a set of UDP headers and attaches them to the outgoing messages.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_build_udp_headers(ms_conn_t *c)
+{
+ int i;
+ unsigned char *hdr;
+
+ assert(c != NULL);
+
+ c->request_id= ms_get_udp_request_id();
+
+ if (c->msgused > c->hdrsize)
+ {
+ void *new_hdrbuf;
+ if (c->hdrbuf)
+ new_hdrbuf= realloc(c->hdrbuf,
+ (size_t)c->msgused * 2 * UDP_HEADER_SIZE);
+ else
+ new_hdrbuf= malloc((size_t)c->msgused * 2 * UDP_HEADER_SIZE);
+ if (! new_hdrbuf)
+ return -1;
+
+ c->hdrbuf= (unsigned char *)new_hdrbuf;
+ c->hdrsize= c->msgused * 2;
+ }
+
+ /* If this is a multi-packet request, drop it. */
+ if (c->udp && (c->msgused > 1))
+ {
+ fprintf(stderr, "multi-packet request for UDP not supported.\n");
+ return -1;
+ }
+
+ hdr= c->hdrbuf;
+ for (i= 0; i < c->msgused; i++)
+ {
+ c->msglist[i].msg_iov[0].iov_base= (void *)hdr;
+ c->msglist[i].msg_iov[0].iov_len= UDP_HEADER_SIZE;
+ *hdr++= (unsigned char)(c->request_id / 256);
+ *hdr++= (unsigned char)(c->request_id % 256);
+ *hdr++= (unsigned char)(i / 256);
+ *hdr++= (unsigned char)(i % 256);
+ *hdr++= (unsigned char)(c->msgused / 256);
+ *hdr++= (unsigned char)(c->msgused % 256);
+ *hdr++= (unsigned char)1; /* support facebook memcached */
+ *hdr++= (unsigned char)0;
+ assert(hdr ==
+ ((unsigned char *)c->msglist[i].msg_iov[0].iov_base
+ + UDP_HEADER_SIZE));
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_build_udp_headers */
+
+
+/**
+ * Transmit the next chunk of data from our list of msgbuf structures.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return TRANSMIT_COMPLETE All done writing.
+ * TRANSMIT_INCOMPLETE More data remaining to write.
+ * TRANSMIT_SOFT_ERROR Can't write any more right now.
+ * TRANSMIT_HARD_ERROR Can't write (c->state is set to conn_closing)
+ */
+static int ms_transmit(ms_conn_t *c)
+{
+ assert(c != NULL);
+
+ if ((c->msgcurr < c->msgused)
+ && (c->msglist[c->msgcurr].msg_iovlen == 0))
+ {
+ /* Finished writing the current msg; advance to the next. */
+ c->msgcurr++;
+ }
+
+ if (c->msgcurr < c->msgused)
+ {
+ ssize_t res;
+ struct msghdr *m= &c->msglist[c->msgcurr];
+
+ res= sendmsg(c->sfd, m, 0);
+ if (res > 0)
+ {
+ atomic_add_size(&ms_stats.bytes_written, res);
+
+ /* We've written some of the data. Remove the completed
+ * iovec entries from the list of pending writes. */
+ while (m->msg_iovlen > 0 && res >= (ssize_t)m->msg_iov->iov_len)
+ {
+ res-= (ssize_t)m->msg_iov->iov_len;
+ m->msg_iovlen--;
+ m->msg_iov++;
+ }
+
+ /* Might have written just part of the last iovec entry;
+ * adjust it so the next write will do the rest. */
+ if (res > 0)
+ {
+ m->msg_iov->iov_base= (void *)((unsigned char *)m->msg_iov->iov_base + res);
+ m->msg_iov->iov_len-= (size_t)res;
+ }
+ return TRANSMIT_INCOMPLETE;
+ }
+ if ((res == -1) && ((errno == EAGAIN) || (errno == EWOULDBLOCK)))
+ {
+ if (! ms_update_event(c, EV_WRITE | EV_PERSIST))
+ {
+ fprintf(stderr, "Couldn't update event.\n");
+ ms_conn_set_state(c, conn_closing);
+ return TRANSMIT_HARD_ERROR;
+ }
+ return TRANSMIT_SOFT_ERROR;
+ }
+
+ /* if res==0 or res==-1 and error is not EAGAIN or EWOULDBLOCK,
+ * we have a real error, on which we close the connection */
+ fprintf(stderr, "Failed to write, and not due to blocking.\n");
+
+ ms_conn_set_state(c, conn_closing);
+ return TRANSMIT_HARD_ERROR;
+ }
+ else
+ {
+ return TRANSMIT_COMPLETE;
+ }
+} /* ms_transmit */
+
+
+/**
+ * Shrinks a connection's buffers if they're too big. This prevents
+ * periodic large "mget" response from server chewing lots of client
+ * memory.
+ *
+ * This should only be called in between requests since it can wipe output
+ * buffers!
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_conn_shrink(ms_conn_t *c)
+{
+ assert(c != NULL);
+
+ if (c->udp)
+ return;
+
+ if ((c->rsize > READ_BUFFER_HIGHWAT) && (c->rbytes < DATA_BUFFER_SIZE))
+ {
+ char *newbuf;
+
+ if (c->rcurr != c->rbuf)
+ memmove(c->rbuf, c->rcurr, (size_t)c->rbytes);
+
+ newbuf= (char *)realloc((void *)c->rbuf, DATA_BUFFER_SIZE);
+
+ if (newbuf)
+ {
+ c->rbuf= newbuf;
+ c->rsize= DATA_BUFFER_SIZE;
+ }
+ c->rcurr= c->rbuf;
+ }
+
+ if (c->udp && (c->rudpsize > UDP_DATA_BUFFER_HIGHWAT)
+ && (c->rudpbytes + UDP_MAX_PAYLOAD_SIZE < UDP_DATA_BUFFER_SIZE))
+ {
+ char *new_rbuf= (char *)realloc(c->rudpbuf, (size_t)c->rudpsize * 2);
+ if (new_rbuf)
+ {
+ c->rudpbuf= new_rbuf;
+ c->rudpsize= UDP_DATA_BUFFER_SIZE;
+ }
+ /* TODO check error condition? */
+ }
+
+ if (c->msgsize > MSG_LIST_HIGHWAT)
+ {
+ struct msghdr *newbuf= (struct msghdr *)realloc(
+ (void *)c->msglist,
+ MSG_LIST_INITIAL
+ * sizeof(c->msglist[0]));
+ if (newbuf)
+ {
+ c->msglist= newbuf;
+ c->msgsize= MSG_LIST_INITIAL;
+ }
+ /* TODO check error condition? */
+ }
+
+ if (c->iovsize > IOV_LIST_HIGHWAT)
+ {
+ struct iovec *newbuf= (struct iovec *)realloc((void *)c->iov,
+ IOV_LIST_INITIAL
+ * sizeof(c->iov[0]));
+ if (newbuf)
+ {
+ c->iov= newbuf;
+ c->iovsize= IOV_LIST_INITIAL;
+ }
+ /* TODO check return value */
+ }
+} /* ms_conn_shrink */
+
+
+/**
+ * Sets a connection's current state in the state machine. Any special
+ * processing that needs to happen on certain state transitions can
+ * happen here.
+ *
+ * @param c, pointer of the concurrency
+ * @param state, connection state
+ */
+static void ms_conn_set_state(ms_conn_t *c, int state)
+{
+ assert(c != NULL);
+
+ if (state != c->state)
+ {
+ if (state == conn_read)
+ {
+ ms_conn_shrink(c);
+ }
+ c->state= state;
+ }
+} /* ms_conn_set_state */
+
+
+/**
+ * update the event if socks change state. for example: when
+ * change the listen scoket read event to sock write event, or
+ * change socket handler, we could call this function.
+ *
+ * @param c, pointer of the concurrency
+ * @param new_flags, new event flags
+ *
+ * @return bool, if success, return true, else return false
+ */
+static bool ms_update_event(ms_conn_t *c, const int new_flags)
+{
+ assert(c != NULL);
+
+ struct event_base *base= c->event.ev_base;
+ if ((c->ev_flags == new_flags) && (ms_setting.rep_write_srv == 0)
+ && (! ms_setting.facebook_test || (c->total_sfds == 1)))
+ {
+ return true;
+ }
+
+ if (event_del(&c->event) == -1)
+ {
+ /* try to delete the event again */
+ if (event_del(&c->event) == -1)
+ {
+ return false;
+ }
+ }
+
+ event_set(&c->event,
+ c->sfd,
+ (short)new_flags,
+ ms_event_handler,
+ (void *)c);
+ event_base_set(base, &c->event);
+ c->ev_flags= (short)new_flags;
+
+ if (event_add(&c->event, NULL) == -1)
+ {
+ return false;
+ }
+
+ return true;
+} /* ms_update_event */
+
+
+/**
+ * If user want to get the expected throughput, we could limit
+ * the performance of memslap. we could give up some work and
+ * just wait a short time. The function is used to check this
+ * case.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return bool, if success, return true, else return false
+ */
+static bool ms_need_yield(ms_conn_t *c)
+{
+ ms_thread_t *ms_thread= pthread_getspecific(ms_thread_key);
+ int64_t tps= 0;
+ int64_t time_diff= 0;
+ struct timeval curr_time;
+ ms_task_t *task= &c->curr_task;
+
+ if (ms_setting.expected_tps > 0)
+ {
+ gettimeofday(&curr_time, NULL);
+ time_diff= ms_time_diff(&ms_thread->startup_time, &curr_time);
+ tps= (int64_t)(((task->get_opt + task->set_opt) / (uint64_t)time_diff) * 1000000);
+
+ /* current throughput is greater than expected throughput */
+ if (tps > ms_thread->thread_ctx->tps_perconn)
+ {
+ return true;
+ }
+ }
+
+ return false;
+} /* ms_need_yield */
+
+
+/**
+ * used to update the start time of each operation
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_update_start_time(ms_conn_t *c)
+{
+ ms_task_item_t *item= c->curr_task.item;
+
+ if ((ms_setting.stat_freq > 0) || c->udp
+ || ((c->currcmd.cmd == CMD_SET) && (item->exp_time > 0)))
+ {
+ gettimeofday(&c->start_time, NULL);
+ if ((c->currcmd.cmd == CMD_SET) && (item->exp_time > 0))
+ {
+ /* record the current time */
+ item->client_time= c->start_time.tv_sec;
+ }
+ }
+} /* ms_update_start_time */
+
+
+/**
+ * run the state machine
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_drive_machine(ms_conn_t *c)
+{
+ bool stop= false;
+
+ assert(c != NULL);
+
+ while (! stop)
+ {
+ switch (c->state)
+ {
+ case conn_read:
+ if (c->readval)
+ {
+ if (c->rbytes >= c->rvbytes)
+ {
+ ms_complete_nread(c);
+ break;
+ }
+ }
+ else
+ {
+ if (ms_try_read_line(c) != 0)
+ {
+ break;
+ }
+ }
+
+ if (ms_try_read_network(c) != 0)
+ {
+ break;
+ }
+
+ /* doesn't read all the response data, wait event wake up */
+ if (! c->currcmd.isfinish)
+ {
+ if (! ms_update_event(c, EV_READ | EV_PERSIST))
+ {
+ fprintf(stderr, "Couldn't update event.\n");
+ ms_conn_set_state(c, conn_closing);
+ break;
+ }
+ stop= true;
+ break;
+ }
+
+ /* we have no command line and no data to read from network, next write */
+ ms_conn_set_state(c, conn_write);
+ memcpy(&c->precmd, &c->currcmd, sizeof(ms_cmdstat_t)); /* replicate command state */
+
+ break;
+
+ case conn_write:
+ if (! c->ctnwrite && ms_need_yield(c))
+ {
+ usleep(10);
+
+ if (! ms_update_event(c, EV_WRITE | EV_PERSIST))
+ {
+ fprintf(stderr, "Couldn't update event.\n");
+ ms_conn_set_state(c, conn_closing);
+ break;
+ }
+ stop= true;
+ break;
+ }
+
+ if (! c->ctnwrite && (ms_exec_task(c) != 0))
+ {
+ ms_conn_set_state(c, conn_closing);
+ break;
+ }
+
+ /* record the start time before starting to send data if necessary */
+ if (! c->ctnwrite || (c->change_sfd && c->ctnwrite))
+ {
+ if (c->change_sfd)
+ {
+ c->change_sfd= false;
+ }
+ ms_update_start_time(c);
+ }
+
+ /* change sfd if necessary */
+ if (c->change_sfd)
+ {
+ c->ctnwrite= true;
+ stop= true;
+ break;
+ }
+
+ /* execute task until nothing need be written to network */
+ if (! c->ctnwrite && (c->msgcurr == c->msgused))
+ {
+ if (! ms_update_event(c, EV_WRITE | EV_PERSIST))
+ {
+ fprintf(stderr, "Couldn't update event.\n");
+ ms_conn_set_state(c, conn_closing);
+ break;
+ }
+ stop= true;
+ break;
+ }
+
+ switch (ms_transmit(c))
+ {
+ case TRANSMIT_COMPLETE:
+ /* we have no data to write to network, next wait repose */
+ if (! ms_update_event(c, EV_READ | EV_PERSIST))
+ {
+ fprintf(stderr, "Couldn't update event.\n");
+ ms_conn_set_state(c, conn_closing);
+ c->ctnwrite= false;
+ break;
+ }
+ ms_conn_set_state(c, conn_read);
+ c->ctnwrite= false;
+ stop= true;
+ break;
+
+ case TRANSMIT_INCOMPLETE:
+ c->ctnwrite= true;
+ break; /* Continue in state machine. */
+
+ case TRANSMIT_HARD_ERROR:
+ c->ctnwrite= false;
+ break;
+
+ case TRANSMIT_SOFT_ERROR:
+ c->ctnwrite= true;
+ stop= true;
+ break;
+
+ default:
+ break;
+ } /* switch */
+
+ break;
+
+ case conn_closing:
+ /* recovery mode, need reconnect if connection close */
+ if (ms_setting.reconnect && (! ms_global.time_out
+ || ((ms_setting.run_time == 0)
+ && (c->remain_exec_num > 0))))
+ {
+ if (ms_reconn(c) != 0)
+ {
+ ms_conn_close(c);
+ stop= true;
+ break;
+ }
+
+ ms_reset_conn(c, false);
+
+ if (c->total_sfds == 1)
+ {
+ if (! ms_update_event(c, EV_WRITE | EV_PERSIST))
+ {
+ fprintf(stderr, "Couldn't update event.\n");
+ ms_conn_set_state(c, conn_closing);
+ break;
+ }
+ }
+
+ break;
+ }
+ else
+ {
+ ms_conn_close(c);
+ stop= true;
+ break;
+ }
+
+ default:
+ assert(0);
+ } /* switch */
+ }
+} /* ms_drive_machine */
+
+
+/**
+ * the event handler of each thread
+ *
+ * @param fd, the file descriptor of socket
+ * @param which, event flag
+ * @param arg, argument
+ */
+void ms_event_handler(const int fd, const short which, void *arg)
+{
+ ms_conn_t *c= (ms_conn_t *)arg;
+
+ assert(c != NULL);
+
+ c->which= which;
+
+ /* sanity */
+ if (fd != c->sfd)
+ {
+ fprintf(stderr,
+ "Catastrophic: event fd: %d doesn't match conn fd: %d\n",
+ fd,
+ c->sfd);
+ ms_conn_close(c);
+ exit(1);
+ }
+ assert(fd == c->sfd);
+
+ ms_drive_machine(c);
+
+ /* wait for next event */
+} /* ms_event_handler */
+
+
+/**
+ * get the next socket descriptor index to run for replication
+ *
+ * @param c, pointer of the concurrency
+ * @param cmd, command(get or set )
+ *
+ * @return int, if success, return the index, else return EXIT_SUCCESS
+ */
+static uint32_t ms_get_rep_sock_index(ms_conn_t *c, int cmd)
+{
+ uint32_t sock_index= 0;
+ uint32_t i= 0;
+
+ if (c->total_sfds == 1)
+ {
+ return EXIT_SUCCESS;
+ }
+
+ if (ms_setting.rep_write_srv == 0)
+ {
+ return sock_index;
+ }
+
+ do
+ {
+ if (cmd == CMD_SET)
+ {
+ for (i= 0; i < ms_setting.rep_write_srv; i++)
+ {
+ if (c->tcpsfd[i] > 0)
+ {
+ break;
+ }
+ }
+
+ if (i == ms_setting.rep_write_srv)
+ {
+ /* random get one replication server to read */
+ sock_index= (uint32_t)random() % c->total_sfds;
+ }
+ else
+ {
+ /* random get one replication writing server to write */
+ sock_index= (uint32_t)random() % ms_setting.rep_write_srv;
+ }
+ }
+ else if (cmd == CMD_GET)
+ {
+ /* random get one replication server to read */
+ sock_index= (uint32_t)random() % c->total_sfds;
+ }
+ }
+ while (c->tcpsfd[sock_index] == 0);
+
+ return sock_index;
+} /* ms_get_rep_sock_index */
+
+
+/**
+ * get the next socket descriptor index to run
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, return the index
+ */
+static uint32_t ms_get_next_sock_index(ms_conn_t *c)
+{
+ uint32_t sock_index= 0;
+
+ do
+ {
+ sock_index= (++c->cur_idx == c->total_sfds) ? 0 : c->cur_idx;
+ }
+ while (c->tcpsfd[sock_index] == 0);
+
+ return sock_index;
+} /* ms_get_next_sock_index */
+
+
+/**
+ * update socket event of the connections
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_update_conn_sock_event(ms_conn_t *c)
+{
+ assert(c != NULL);
+
+ switch (c->currcmd.cmd)
+ {
+ case CMD_SET:
+ if (ms_setting.facebook_test && c->udp)
+ {
+ c->sfd= c->tcpsfd[0];
+ c->udp= false;
+ c->change_sfd= true;
+ }
+ break;
+
+ case CMD_GET:
+ if (ms_setting.facebook_test && ! c->udp)
+ {
+ c->sfd= c->udpsfd;
+ c->udp= true;
+ c->change_sfd= true;
+ }
+ break;
+
+ default:
+ break;
+ } /* switch */
+
+ if (! c->udp && (c->total_sfds > 1))
+ {
+ if (c->cur_idx != c->total_sfds)
+ {
+ if (ms_setting.rep_write_srv == 0)
+ {
+ c->cur_idx= ms_get_next_sock_index(c);
+ }
+ else
+ {
+ c->cur_idx= ms_get_rep_sock_index(c, c->currcmd.cmd);
+ }
+ }
+ else
+ {
+ /* must select the first sock of the connection at the beginning */
+ c->cur_idx= 0;
+ }
+
+ c->sfd= c->tcpsfd[c->cur_idx];
+ assert(c->sfd != 0);
+ c->change_sfd= true;
+ }
+
+ if (c->change_sfd)
+ {
+ if (! ms_update_event(c, EV_WRITE | EV_PERSIST))
+ {
+ fprintf(stderr, "Couldn't update event.\n");
+ ms_conn_set_state(c, conn_closing);
+ return -1;
+ }
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_update_conn_sock_event */
+
+
+/**
+ * for ASCII protocol, this function build the set command
+ * string and send the command.
+ *
+ * @param c, pointer of the concurrency
+ * @param item, pointer of task item which includes the object
+ * information
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_build_ascii_write_buf_set(ms_conn_t *c, ms_task_item_t *item)
+{
+ int value_offset;
+ int write_len;
+ char *buffer= c->wbuf;
+
+ write_len= snprintf(buffer,
+ c->wsize,
+ " %u %d %d\r\n",
+ 0,
+ item->exp_time,
+ item->value_size);
+
+ if (write_len > c->wsize || write_len < 0)
+ {
+ /* ought to be always enough. just fail for simplicity */
+ fprintf(stderr, "output command line too long.\n");
+ return -1;
+ }
+
+ if (item->value_offset == INVALID_OFFSET)
+ {
+ value_offset= item->key_suffix_offset;
+ }
+ else
+ {
+ value_offset= item->value_offset;
+ }
+
+ if ((ms_add_iov(c, "set ", 4) != 0)
+ || (ms_add_iov(c, (char *)&item->key_prefix,
+ (int)KEY_PREFIX_SIZE) != 0)
+ || (ms_add_iov(c, &ms_setting.char_block[item->key_suffix_offset],
+ item->key_size - (int)KEY_PREFIX_SIZE) != 0)
+ || (ms_add_iov(c, buffer, write_len) != 0)
+ || (ms_add_iov(c, &ms_setting.char_block[value_offset],
+ item->value_size) != 0)
+ || (ms_add_iov(c, "\r\n", 2) != 0)
+ || (c->udp && (ms_build_udp_headers(c) != 0)))
+ {
+ return -1;
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_build_ascii_write_buf_set */
+
+
+/**
+ * used to send set command to server
+ *
+ * @param c, pointer of the concurrency
+ * @param item, pointer of task item which includes the object
+ * information
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+int ms_mcd_set(ms_conn_t *c, ms_task_item_t *item)
+{
+ assert(c != NULL);
+
+ c->currcmd.cmd= CMD_SET;
+ c->currcmd.isfinish= false;
+ c->currcmd.retstat= MCD_FAILURE;
+
+ if (ms_update_conn_sock_event(c) != 0)
+ {
+ return -1;
+ }
+
+ c->msgcurr= 0;
+ c->msgused= 0;
+ c->iovused= 0;
+ if (ms_add_msghdr(c) != 0)
+ {
+ fprintf(stderr, "Out of memory preparing request.");
+ return -1;
+ }
+
+ /* binary protocol */
+ if (c->protocol == binary_prot)
+ {
+ if (ms_build_bin_write_buf_set(c, item) != 0)
+ {
+ return -1;
+ }
+ }
+ else
+ {
+ if (ms_build_ascii_write_buf_set(c, item) != 0)
+ {
+ return -1;
+ }
+ }
+
+ atomic_add_size(&ms_stats.obj_bytes,
+ item->key_size + item->value_size);
+ atomic_add_size(&ms_stats.cmd_set, 1);
+
+ return EXIT_SUCCESS;
+} /* ms_mcd_set */
+
+
+/**
+ * for ASCII protocol, this function build the get command
+ * string and send the command.
+ *
+ * @param c, pointer of the concurrency
+ * @param item, pointer of task item which includes the object
+ * information
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_build_ascii_write_buf_get(ms_conn_t *c, ms_task_item_t *item)
+{
+ if ((ms_add_iov(c, "get ", 4) != 0)
+ || (ms_add_iov(c, (char *)&item->key_prefix,
+ (int)KEY_PREFIX_SIZE) != 0)
+ || (ms_add_iov(c, &ms_setting.char_block[item->key_suffix_offset],
+ item->key_size - (int)KEY_PREFIX_SIZE) != 0)
+ || (ms_add_iov(c, "\r\n", 2) != 0)
+ || (c->udp && (ms_build_udp_headers(c) != 0)))
+ {
+ return -1;
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_build_ascii_write_buf_get */
+
+
+/**
+ * used to send the get command to server
+ *
+ * @param c, pointer of the concurrency
+ * @param item, pointer of task item which includes the object
+ * information
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+int ms_mcd_get(ms_conn_t *c, ms_task_item_t *item)
+{
+ assert(c != NULL);
+
+ c->currcmd.cmd= CMD_GET;
+ c->currcmd.isfinish= false;
+ c->currcmd.retstat= MCD_FAILURE;
+
+ if (ms_update_conn_sock_event(c) != 0)
+ {
+ return -1;
+ }
+
+ c->msgcurr= 0;
+ c->msgused= 0;
+ c->iovused= 0;
+ if (ms_add_msghdr(c) != 0)
+ {
+ fprintf(stderr, "Out of memory preparing request.");
+ return -1;
+ }
+
+ /* binary protocol */
+ if (c->protocol == binary_prot)
+ {
+ if (ms_build_bin_write_buf_get(c, item) != 0)
+ {
+ return -1;
+ }
+ }
+ else
+ {
+ if (ms_build_ascii_write_buf_get(c, item) != 0)
+ {
+ return -1;
+ }
+ }
+
+ atomic_add_size(&ms_stats.cmd_get, 1);
+
+ return EXIT_SUCCESS;
+} /* ms_mcd_get */
+
+
+/**
+ * for ASCII protocol, this function build the multi-get command
+ * string and send the command.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_build_ascii_write_buf_mlget(ms_conn_t *c)
+{
+ ms_task_item_t *item;
+
+ if (ms_add_iov(c, "get", 3) != 0)
+ {
+ return -1;
+ }
+
+ for (int i= 0; i < c->mlget_task.mlget_num; i++)
+ {
+ item= c->mlget_task.mlget_item[i].item;
+ assert(item != NULL);
+ if ((ms_add_iov(c, " ", 1) != 0)
+ || (ms_add_iov(c, (char *)&item->key_prefix,
+ (int)KEY_PREFIX_SIZE) != 0)
+ || (ms_add_iov(c, &ms_setting.char_block[item->key_suffix_offset],
+ item->key_size - (int)KEY_PREFIX_SIZE) != 0))
+ {
+ return -1;
+ }
+ }
+
+ if ((ms_add_iov(c, "\r\n", 2) != 0)
+ || (c->udp && (ms_build_udp_headers(c) != 0)))
+ {
+ return -1;
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_build_ascii_write_buf_mlget */
+
+
+/**
+ * used to send the multi-get command to server
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+int ms_mcd_mlget(ms_conn_t *c)
+{
+ ms_task_item_t *item;
+
+ assert(c != NULL);
+ assert(c->mlget_task.mlget_num >= 1);
+
+ c->currcmd.cmd= CMD_GET;
+ c->currcmd.isfinish= false;
+ c->currcmd.retstat= MCD_FAILURE;
+
+ if (ms_update_conn_sock_event(c) != 0)
+ {
+ return -1;
+ }
+
+ c->msgcurr= 0;
+ c->msgused= 0;
+ c->iovused= 0;
+ if (ms_add_msghdr(c) != 0)
+ {
+ fprintf(stderr, "Out of memory preparing request.");
+ return -1;
+ }
+
+ /* binary protocol */
+ if (c->protocol == binary_prot)
+ {
+ if (ms_build_bin_write_buf_mlget(c) != 0)
+ {
+ return -1;
+ }
+ }
+ else
+ {
+ if (ms_build_ascii_write_buf_mlget(c) != 0)
+ {
+ return -1;
+ }
+ }
+
+ /* decrease operation time of each item */
+ for (int i= 0; i < c->mlget_task.mlget_num; i++)
+ {
+ item= c->mlget_task.mlget_item[i].item;
+ atomic_add_size(&ms_stats.cmd_get, 1);
+ }
+
+ (void)item;
+
+ return EXIT_SUCCESS;
+} /* ms_mcd_mlget */
+
+
+/**
+ * binary protocol support
+ */
+
+/**
+ * for binary protocol, parse the response of server
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_bin_process_response(ms_conn_t *c)
+{
+ const char *errstr= NULL;
+
+ assert(c != NULL);
+
+ uint32_t bodylen= c->binary_header.response.bodylen;
+ uint8_t opcode= c->binary_header.response.opcode;
+ uint16_t status= c->binary_header.response.status;
+
+ if (bodylen > 0)
+ {
+ c->rvbytes= (int32_t)bodylen;
+ c->readval= true;
+ return EXIT_FAILURE;
+ }
+ else
+ {
+ switch (status)
+ {
+ case PROTOCOL_BINARY_RESPONSE_SUCCESS:
+ if (opcode == PROTOCOL_BINARY_CMD_SET)
+ {
+ c->currcmd.retstat= MCD_STORED;
+ }
+ else if (opcode == PROTOCOL_BINARY_CMD_DELETE)
+ {
+ c->currcmd.retstat= MCD_DELETED;
+ }
+ else if (opcode == PROTOCOL_BINARY_CMD_GET)
+ {
+ c->currcmd.retstat= MCD_END;
+ }
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_ENOMEM:
+ errstr= "Out of memory";
+ c->currcmd.retstat= MCD_SERVER_ERROR;
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_UNKNOWN_COMMAND:
+ errstr= "Unknown command";
+ c->currcmd.retstat= MCD_UNKNOWN_READ_FAILURE;
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_KEY_ENOENT:
+ errstr= "Not found";
+ c->currcmd.retstat= MCD_NOTFOUND;
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_EINVAL:
+ errstr= "Invalid arguments";
+ c->currcmd.retstat= MCD_PROTOCOL_ERROR;
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_KEY_EEXISTS:
+ errstr= "Data exists for key.";
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_E2BIG:
+ errstr= "Too large.";
+ c->currcmd.retstat= MCD_SERVER_ERROR;
+ break;
+
+ case PROTOCOL_BINARY_RESPONSE_NOT_STORED:
+ errstr= "Not stored.";
+ c->currcmd.retstat= MCD_NOTSTORED;
+ break;
+
+ default:
+ errstr= "Unknown error";
+ c->currcmd.retstat= MCD_UNKNOWN_READ_FAILURE;
+ break;
+ } /* switch */
+
+ if (errstr != NULL)
+ {
+ fprintf(stderr, "%s\n", errstr);
+ }
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_bin_process_response */
+
+
+/* build binary header and add the header to the buffer to send */
+
+/**
+ * build binary header and add the header to the buffer to send
+ *
+ * @param c, pointer of the concurrency
+ * @param opcode, operation code
+ * @param hdr_len, length of header
+ * @param key_len, length of key
+ * @param body_len. length of body
+ */
+static void ms_add_bin_header(ms_conn_t *c,
+ uint8_t opcode,
+ uint8_t hdr_len,
+ uint16_t key_len,
+ uint32_t body_len)
+{
+ protocol_binary_request_header *header;
+
+ assert(c != NULL);
+
+ header= (protocol_binary_request_header *)c->wcurr;
+
+ header->request.magic= (uint8_t)PROTOCOL_BINARY_REQ;
+ header->request.opcode= (uint8_t)opcode;
+ header->request.keylen= htons(key_len);
+
+ header->request.extlen= (uint8_t)hdr_len;
+ header->request.datatype= (uint8_t)PROTOCOL_BINARY_RAW_BYTES;
+ header->request.vbucket= 0;
+
+ header->request.bodylen= htonl(body_len);
+ header->request.opaque= 0;
+ header->request.cas= 0;
+
+ ms_add_iov(c, c->wcurr, sizeof(header->request));
+} /* ms_add_bin_header */
+
+
+/**
+ * add the key to the socket write buffer array
+ *
+ * @param c, pointer of the concurrency
+ * @param item, pointer of task item which includes the object
+ * information
+ */
+static void ms_add_key_to_iov(ms_conn_t *c, ms_task_item_t *item)
+{
+ ms_add_iov(c, (char *)&item->key_prefix, (int)KEY_PREFIX_SIZE);
+ ms_add_iov(c, &ms_setting.char_block[item->key_suffix_offset],
+ item->key_size - (int)KEY_PREFIX_SIZE);
+}
+
+
+/**
+ * for binary protocol, this function build the set command
+ * and add the command to send buffer array.
+ *
+ * @param c, pointer of the concurrency
+ * @param item, pointer of task item which includes the object
+ * information
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_build_bin_write_buf_set(ms_conn_t *c, ms_task_item_t *item)
+{
+ assert(c->wbuf == c->wcurr);
+
+ int value_offset;
+ protocol_binary_request_set *rep= (protocol_binary_request_set *)c->wcurr;
+ uint16_t keylen= (uint16_t)item->key_size;
+ uint32_t bodylen= (uint32_t)sizeof(rep->message.body)
+ + (uint32_t)keylen + (uint32_t)item->value_size;
+
+ ms_add_bin_header(c,
+ PROTOCOL_BINARY_CMD_SET,
+ sizeof(rep->message.body),
+ keylen,
+ bodylen);
+ rep->message.body.flags= 0;
+ rep->message.body.expiration= htonl((uint32_t)item->exp_time);
+ ms_add_iov(c, &rep->message.body, sizeof(rep->message.body));
+ ms_add_key_to_iov(c, item);
+
+ if (item->value_offset == INVALID_OFFSET)
+ {
+ value_offset= item->key_suffix_offset;
+ }
+ else
+ {
+ value_offset= item->value_offset;
+ }
+ ms_add_iov(c, &ms_setting.char_block[value_offset], item->value_size);
+
+ return EXIT_SUCCESS;
+} /* ms_build_bin_write_buf_set */
+
+
+/**
+ * for binary protocol, this function build the get command and
+ * add the command to send buffer array.
+ *
+ * @param c, pointer of the concurrency
+ * @param item, pointer of task item which includes the object
+ * information
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_build_bin_write_buf_get(ms_conn_t *c, ms_task_item_t *item)
+{
+ assert(c->wbuf == c->wcurr);
+
+ ms_add_bin_header(c, PROTOCOL_BINARY_CMD_GET, 0, (uint16_t)item->key_size,
+ (uint32_t)item->key_size);
+ ms_add_key_to_iov(c, item);
+
+ return EXIT_SUCCESS;
+} /* ms_build_bin_write_buf_get */
+
+
+/**
+ * for binary protocol, this function build the multi-get
+ * command and add the command to send buffer array.
+ *
+ * @param c, pointer of the concurrency
+ * @param item, pointer of task item which includes the object
+ * information
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_build_bin_write_buf_mlget(ms_conn_t *c)
+{
+ ms_task_item_t *item;
+
+ assert(c->wbuf == c->wcurr);
+
+ for (int i= 0; i < c->mlget_task.mlget_num; i++)
+ {
+ item= c->mlget_task.mlget_item[i].item;
+ assert(item != NULL);
+
+ ms_add_bin_header(c,
+ PROTOCOL_BINARY_CMD_GET,
+ 0,
+ (uint16_t)item->key_size,
+ (uint32_t)item->key_size);
+ ms_add_key_to_iov(c, item);
+ c->wcurr+= sizeof(protocol_binary_request_get);
+ }
+
+ c->wcurr= c->wbuf;
+
+ return EXIT_SUCCESS;
+} /* ms_build_bin_write_buf_mlget */
--- /dev/null
+/*
+ * File: ms_conn.h
+ * Author: Mingqiang Zhuang
+ *
+ * Created on February 10, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ */
+#ifndef MS_CONN_H
+#define MS_CONN_H
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <event.h>
+#include <netdb.h>
+
+#include "ms_task.h"
+#include "libmemcachedprotocol-0.0/binary.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define DATA_BUFFER_SIZE (1024 * 1024 + 2048) /* read buffer, 1M + 2k, enough for the max value(1M) */
+#define WRITE_BUFFER_SIZE (32 * 1024) /* write buffer, 32k */
+#define UDP_DATA_BUFFER_SIZE (1 * 1024 * 1024) /* read buffer for UDP, 1M */
+#define UDP_MAX_PAYLOAD_SIZE 1400 /* server limit UDP payload size */
+#define UDP_MAX_SEND_PAYLOAD_SIZE 1400 /* mtu size is 1500 */
+#define UDP_HEADER_SIZE 8 /* UDP header size */
+#define MAX_SENDBUF_SIZE (256 * 1024 * 1024) /* Maximum socket buffer size */
+#define SOCK_WAIT_TIMEOUT 30 /* maximum waiting time of UDP, 30s */
+#define MAX_UDP_PACKET (1 << 16) /* maximum UDP packets, 65536 */
+
+/* Initial size of the sendmsg() scatter/gather array. */
+#define IOV_LIST_INITIAL 400
+
+/* Initial number of sendmsg() argument structures to allocate. */
+#define MSG_LIST_INITIAL 10
+
+/* High water marks for buffer shrinking */
+#define READ_BUFFER_HIGHWAT (2 * DATA_BUFFER_SIZE)
+#define UDP_DATA_BUFFER_HIGHWAT (4 * UDP_DATA_BUFFER_SIZE)
+#define IOV_LIST_HIGHWAT 600
+#define MSG_LIST_HIGHWAT 100
+
+/* parse udp header */
+#define HEADER_TO_REQID(ptr) ((uint16_t)*ptr * 256 \
+ + (uint16_t)*(ptr + 1))
+#define HEADER_TO_SEQNUM(ptr) ((uint16_t)*(ptr \
+ + 2) * 256 \
+ + (uint16_t)*(ptr + 3))
+#define HEADER_TO_PACKETS(ptr) ((uint16_t)*(ptr \
+ + 4) * 256 \
+ + (uint16_t)*(ptr + 5))
+
+/* states of connection */
+enum conn_states
+{
+ conn_read, /* reading in a command line */
+ conn_write, /* writing out a simple response */
+ conn_closing /* closing this connection */
+};
+
+/* returned states of memcached command */
+enum mcd_ret
+{
+ MCD_SUCCESS, /* command success */
+ MCD_FAILURE, /* command failure */
+ MCD_UNKNOWN_READ_FAILURE, /* unknown read failure */
+ MCD_PROTOCOL_ERROR, /* protocol error */
+ MCD_CLIENT_ERROR, /* client error, wrong command */
+ MCD_SERVER_ERROR, /* server error, server run command failed */
+ MCD_DATA_EXISTS, /* object is existent in server */
+ MCD_NOTSTORED, /* server doesn't set the object successfully */
+ MCD_STORED, /* server set the object successfully */
+ MCD_NOTFOUND, /* server not find the object */
+ MCD_END, /* end of the response of get command */
+ MCD_DELETED, /* server delete the object successfully */
+ MCD_STAT /* response of stats command */
+};
+
+/* used to store the current or previous running command state */
+typedef struct cmdstat
+{
+ int cmd; /* command name */
+ int retstat; /* return state of this command */
+ bool isfinish; /* if it read all the response data */
+ uint64_t key_prefix; /* key prefix */
+} ms_cmdstat_t;
+
+/* udp packet structure */
+typedef struct udppkt
+{
+ uint8_t *header; /* udp header of the packet */
+ char *data; /* udp data of the packet */
+ int rbytes; /* number of data in the packet */
+ int copybytes; /* number of copied data in the packet */
+} ms_udppkt_t;
+
+/* three protocols supported */
+enum protocol
+{
+ ascii_prot = 3, /* ASCII protocol */
+ binary_prot /* binary protocol */
+};
+
+/**
+ * concurrency structure
+ *
+ * Each thread has a libevent to manage the events of network.
+ * Each thread has one or more self-governed concurrencies;
+ * each concurrency has one or more socket connections. This
+ * concurrency structure includes all the private variables of
+ * the concurrency.
+ */
+typedef struct conn
+{
+ uint32_t conn_idx; /* connection index in the thread */
+ int sfd; /* current tcp sock handler of the connection structure */
+ int udpsfd; /* current udp sock handler of the connection structure*/
+ int state; /* state of the connection */
+ struct event event; /* event for libevent */
+ short ev_flags; /* event flag for libevent */
+ short which; /* which events were just triggered */
+ bool change_sfd; /* whether change sfd */
+
+ int *tcpsfd; /* TCP sock array */
+ uint32_t total_sfds; /* how many socks in the tcpsfd array */
+ uint32_t alive_sfds; /* alive socks */
+ uint32_t cur_idx; /* current sock index in tcpsfd array */
+
+ ms_cmdstat_t precmd; /* previous command state */
+ ms_cmdstat_t currcmd; /* current command state */
+
+ char *rbuf; /* buffer to read commands into */
+ char *rcurr; /* but if we parsed some already, this is where we stopped */
+ int rsize; /* total allocated size of rbuf */
+ int rbytes; /* how much data, starting from rcur, do we have unparsed */
+
+ bool readval; /* read value state, read known data size */
+ int rvbytes; /* total value size need to read */
+
+ char *wbuf; /* buffer to write commands out */
+ char *wcurr; /* for multi-get, where we stopped */
+ int wsize; /* total allocated size of wbuf */
+ bool ctnwrite; /* continue to write */
+
+ /* data for the mwrite state */
+ struct iovec *iov;
+ int iovsize; /* number of elements allocated in iov[] */
+ int iovused; /* number of elements used in iov[] */
+
+ struct msghdr *msglist;
+ int msgsize; /* number of elements allocated in msglist[] */
+ int msgused; /* number of elements used in msglist[] */
+ int msgcurr; /* element in msglist[] being transmitted now */
+ int msgbytes; /* number of bytes in current msg */
+
+ /* data for UDP clients */
+ bool udp; /* is this is a UDP "connection" */
+ uint32_t request_id; /* UDP request ID of current operation, if this is a UDP "connection" */
+ uint8_t *hdrbuf; /* udp packet headers */
+ int hdrsize; /* number of headers' worth of space is allocated */
+ struct sockaddr srv_recv_addr; /* Sent the most recent request to which server */
+ socklen_t srv_recv_addr_size;
+
+ /* udp read buffer */
+ char *rudpbuf; /* buffer to read commands into for udp */
+ int rudpsize; /* total allocated size of rudpbuf */
+ int rudpbytes; /* how much data, starting from rudpbuf */
+
+ /* order udp packet */
+ ms_udppkt_t *udppkt; /* the offset of udp packet in rudpbuf */
+ int packets; /* number of total packets need to read */
+ int recvpkt; /* number of received packets */
+ int pktcurr; /* current packet in rudpbuf being ordered */
+ int ordcurr; /* current ordered packet */
+
+ ms_task_item_t *item_win; /* task sequence */
+ int win_size; /* current task window size */
+ uint64_t set_cursor; /* current set item index in the item window */
+ ms_task_t curr_task; /* current running task */
+ ms_mlget_task_t mlget_task; /* multi-get task */
+
+ int warmup_num; /* to run how many warm up operations*/
+ int remain_warmup_num; /* left how many warm up operations to run */
+ int64_t exec_num; /* to run how many task operations */
+ int64_t remain_exec_num; /* how many remained task operations to run */
+
+ /* response time statistic and time out control */
+ struct timeval start_time; /* start time of current operation(s) */
+ struct timeval end_time; /* end time of current operation(s) */
+
+ /* Binary protocol stuff */
+ protocol_binary_response_header binary_header; /* local temporary binary header */
+ enum protocol protocol; /* which protocol this connection speaks */
+} ms_conn_t;
+
+/* used to generate the key prefix */
+uint64_t ms_get_key_prefix(void);
+
+
+/**
+ * setup a connection, each connection structure of each
+ * thread must call this function to initialize.
+ */
+int ms_setup_conn(ms_conn_t *c);
+
+
+/* after one operation completes, reset the connection */
+void ms_reset_conn(ms_conn_t *c, bool timeout);
+
+
+/**
+ * reconnect several disconnected socks in the connection
+ * structure, the ever-1-second timer of the thread will check
+ * whether some socks in the connections disconnect. if
+ * disconnect, reconnect the sock.
+ */
+int ms_reconn_socks(ms_conn_t *c);
+
+
+/* used to send set command to server */
+int ms_mcd_set(ms_conn_t *c, ms_task_item_t *item);
+
+
+/* used to send the get command to server */
+int ms_mcd_get(ms_conn_t *c, ms_task_item_t *item);
+
+
+/* used to send the multi-get command to server */
+int ms_mcd_mlget(ms_conn_t *c);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* end of MS_CONN_H */
--- /dev/null
+/*
+ * File: ms_memslap.h
+ * Author: Mingqiang Zhuang
+ *
+ * Created on February 10, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ */
+#ifndef MS_MEMSLAP_H
+#define MS_MEMSLAP_H
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <assert.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <pthread.h>
+#if !defined(__cplusplus)
+# include <stdbool.h>
+#endif
+#include <math.h>
+
+#include "ms_stats.h"
+#include "ms_atomic.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* command line option */
+typedef enum
+{
+ OPT_VERSION= 'V',
+ OPT_HELP= 'h',
+ OPT_UDP= 'U',
+ OPT_SERVERS= 's',
+ OPT_EXECUTE_NUMBER= 'x',
+ OPT_THREAD_NUMBER= 'T',
+ OPT_CONCURRENCY= 'c',
+ OPT_FIXED_LTH= 'X',
+ OPT_VERIFY= 'v',
+ OPT_GETS_DIVISION= 'd',
+ OPT_TIME= 't',
+ OPT_CONFIG_CMD= 'F',
+ OPT_WINDOW_SIZE= 'w',
+ OPT_EXPIRE= 'e',
+ OPT_STAT_FREQ= 'S',
+ OPT_RECONNECT= 'R',
+ OPT_VERBOSE= 'b',
+ OPT_FACEBOOK_TEST= 'a',
+ OPT_SOCK_PER_CONN= 'n',
+ OPT_BINARY_PROTOCOL= 'B',
+ OPT_OVERWRITE= 'o',
+ OPT_TPS= 'P',
+ OPT_REP_WRITE_SRV= 'p'
+} ms_options_t;
+
+/* global statistic of response time */
+typedef struct statistic
+{
+ pthread_mutex_t stat_mutex; /* synchronize the following members */
+
+ ms_stat_t get_stat; /* statistics of get command */
+ ms_stat_t set_stat; /* statistics of set command */
+ ms_stat_t total_stat; /* statistics of both get and set commands */
+} ms_statistic_t;
+
+/* global status statistic structure */
+typedef struct stats
+{
+ ATOMIC uint32_t active_conns; /* active connections */
+ ATOMIC size_t bytes_read; /* read bytes */
+ ATOMIC size_t bytes_written; /* written bytes */
+ ATOMIC size_t obj_bytes; /* object bytes */
+ ATOMIC size_t pre_cmd_get; /* previous total get command count */
+ ATOMIC size_t pre_cmd_set; /* previous total set command count */
+ ATOMIC size_t cmd_get; /* current total get command count */
+ ATOMIC size_t cmd_set; /* current total set command count */
+ ATOMIC size_t get_misses; /* total objects of get miss */
+ ATOMIC size_t vef_miss; /* total objects of verification miss */
+ ATOMIC size_t vef_failed; /* total objects of verification failed */
+ ATOMIC size_t unexp_unget; /* total objects which is unexpired but not get */
+ ATOMIC size_t exp_get; /* total objects which is expired but get */
+ ATOMIC size_t pkt_disorder; /* disorder packages of UDP */
+ ATOMIC size_t pkt_drop; /* packages dropped of UDP */
+ ATOMIC size_t udp_timeout; /* how many times timeout of UDP happens */
+} ms_stats_t;
+
+/* lock adapter */
+typedef struct sync_lock
+{
+ uint32_t count;
+ pthread_mutex_t lock;
+ pthread_cond_t cond;
+} ms_sync_lock_t;
+
+/* global variable structure */
+typedef struct global
+{
+ /* synchronize lock */
+ ms_sync_lock_t init_lock;
+ ms_sync_lock_t warmup_lock;
+ ms_sync_lock_t run_lock;
+
+ /* mutex for outputing error log synchronously when memslap crashes */
+ pthread_mutex_t quit_mutex;
+
+ /* mutex for generating key prefix */
+ pthread_mutex_t seq_mutex;
+
+ /* global synchronous flags for slap mode */
+ bool finish_warmup;
+ bool time_out;
+} ms_global_t;
+
+/* global structure */
+extern ms_global_t ms_global;
+
+/* global stats information structure */
+extern ms_stats_t ms_stats;
+
+/* global statistic structure */
+extern ms_statistic_t ms_statistic;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* end of MS_MEMSLAP_H */
--- /dev/null
+/*
+ * File: ms_setting.c
+ * Author: Mingqiang Zhuang
+ *
+ * Created on February 10, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ */
+
+#include "mem_config.h"
+
+#include "libmemcached/memcached.h"
+
+#include <ctype.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <pwd.h>
+#include <strings.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+
+
+#include "ms_setting.h"
+#include "ms_conn.h"
+
+#define MAX_EXEC_NUM 0x4000000000000000 /* 1 << 62 */
+#define ADDR_ALIGN(addr) ((addr + 15) & ~(16 - 1)) /* 16 bytes aligned */
+#define RAND_CHAR_SIZE (10 * 1024 * 1024) /* 10M character table */
+#define RESERVED_RAND_CHAR_SIZE (2 * 1024 * 1024) /* reserved 2M to avoid pointer sloping over */
+
+#define DEFAULT_CONFIG_NAME ".memslap.cnf"
+
+#define DEFAULT_THREADS_NUM 1 /* default start one thread */
+#define DEFAULT_CONNS_NUM 16 /* default each thread with 16 connections */
+#define DEFAULT_EXE_NUM 0 /* default execute number is 0 */
+#define DEFAULT_VERIFY_RATE 0.0 /* default it doesn't do data verification */
+#define DEFAULT_OVERWRITE_RATE 0.0 /* default it doesn't do overwrite */
+#define DEFAULT_DIV 1 /* default it runs single get */
+#define DEFAULT_RUN_TIME 600 /* default run time 10 minutes */
+#define DEFAULT_WINDOW_SIZE (10 * UNIT_ITEMS_COUNT) /* default window size is 10k */
+#define DEFAULT_SOCK_PER_CONN 1 /* default socks per connection is 1 */
+
+/* Use this for string generation */
+#define CHAR_COUNT 64 /* number of characters used to generate character table */
+const char ALPHANUMBERICS[]=
+ "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.-";
+
+ms_setting_st ms_setting; /* store the settings specified by user */
+
+
+/* read setting from configuration file */
+static void ms_get_serverlist(char *str);
+static uint32_t ms_get_cpu_count(void);
+ms_conf_type_t ms_get_conf_type(char *line);
+static int ms_is_line_data(char *line);
+static int ms_read_is_data(char *line, ssize_t nread);
+static void ms_no_config_file(void);
+static void ms_parse_cfg_file(char *cfg_file);
+
+
+/* initialize setting structure */
+static void ms_init_random_block(void);
+static void ms_calc_avg_size(void);
+static int ms_shuffle_distr(ms_distr_t *distr, int length);
+static void ms_build_distr(void);
+static void ms_print_setting(void);
+static void ms_setting_slapmode_init_pre(void);
+static void ms_setting_slapmode_init_post(void);
+
+#if !defined(HAVE_GETLINE)
+#include <limits.h>
+static ssize_t getline (char **line, size_t *line_size, FILE *fp)
+{
+ char delim= '\n';
+ ssize_t result= 0;
+ size_t cur_len= 0;
+
+ if (line == NULL || line_size == NULL || fp == NULL)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (*line == NULL || *line_size == 0)
+ {
+ char *new_line;
+ *line_size = 120;
+ new_line= (char *) realloc (*line, *line_size);
+ if (new_line == NULL)
+ {
+ result= -1;
+ return result;
+ }
+ *line= new_line;
+ }
+
+ for (;;)
+ {
+ int i= getc(fp);
+ if (i == EOF)
+ {
+ result = -1;
+ break;
+ }
+
+ /* Make enough space for len+1 (for final NUL) bytes. */
+ if (cur_len + 1 >= *line_size)
+ {
+ size_t needed_max=
+ SSIZE_MAX < SIZE_MAX ? (size_t) SSIZE_MAX + 1 : SIZE_MAX;
+ size_t needed= (2 * (*line_size)) + 1;
+ char *new_line;
+
+ if (needed_max < needed)
+ needed= needed_max;
+ if (cur_len + 1 >= needed)
+ {
+ result= -1;
+ errno= EOVERFLOW;
+ return result;
+ }
+
+ new_line= (char *)realloc(*line, needed);
+ if (new_line == NULL)
+ {
+ result= -1;
+ return result;
+ }
+
+ *line= new_line;
+ *line_size= needed;
+ }
+
+ (*line)[cur_len]= (char)i;
+ cur_len++;
+
+ if (i == delim)
+ break;
+ }
+ (*line)[cur_len] = '\0';
+ if (cur_len != 0)
+ return (ssize_t)cur_len;
+ return result;
+}
+#endif
+
+/**
+ * parse the server list string, and build the servers
+ * information structure array. this function is used to parse
+ * the command line options specified by user.
+ *
+ * @param str, the string of server list
+ */
+static void ms_get_serverlist(char *str)
+{
+ ms_mcd_server_t *srvs= NULL;
+
+ /**
+ * Servers list format is like this. For example:
+ * "localhost:11108, localhost:11109"
+ */
+ memcached_server_st *server_pool;
+ server_pool = memcached_servers_parse(str);
+
+ for (uint32_t loop= 0; loop < memcached_server_list_count(server_pool); loop++)
+ {
+ assert(ms_setting.srv_cnt < ms_setting.total_srv_cnt);
+ strcpy(ms_setting.servers[ms_setting.srv_cnt].srv_host_name, server_pool[loop].hostname);
+ ms_setting.servers[ms_setting.srv_cnt].srv_port= server_pool[loop].port;
+ ms_setting.servers[ms_setting.srv_cnt].disconn_cnt= 0;
+ ms_setting.servers[ms_setting.srv_cnt].reconn_cnt= 0;
+ ms_setting.srv_cnt++;
+
+ if (ms_setting.srv_cnt >= ms_setting.total_srv_cnt)
+ {
+ srvs= (ms_mcd_server_t *)realloc( ms_setting.servers,
+ (size_t)ms_setting.total_srv_cnt * sizeof(ms_mcd_server_t) * 2);
+ if (srvs == NULL)
+ {
+ fprintf(stderr, "Can't reallocate servers structure.\n");
+ exit(1);
+ }
+ ms_setting.servers= srvs;
+ ms_setting.total_srv_cnt*= 2;
+ }
+ }
+
+ memcached_server_free(server_pool);
+} /* ms_get_serverlist */
+
+
+/**
+ * used to get the CPU count of the current system
+ *
+ * @return return the cpu count if get, else return EXIT_FAILURE
+ */
+static uint32_t ms_get_cpu_count()
+{
+#ifdef HAVE__SC_NPROCESSORS_ONLN
+ return sysconf(_SC_NPROCESSORS_CONF);
+
+#else
+# ifdef HAVE_CPU_SET_T
+ int cpu_count= 0;
+ cpu_set_t cpu_set;
+
+ sched_getaffinity(0, sizeof(cpu_set_t), &cpu_set);
+
+ for (int i= 0; i < (sizeof(cpu_set_t) * 8); i++)
+ {
+ if (CPU_ISSET(i, &cpu_set))
+ {
+ cpu_count++;
+ }
+ }
+
+ return cpu_count;
+
+# endif
+#endif
+
+ /* the system with one cpu at least */
+ return EXIT_FAILURE;
+} /* ms_get_cpu_count */
+
+
+/**
+ * used to get the configure type based on the type string read
+ * from the configuration file.
+ *
+ * @param line, string of one line
+ *
+ * @return ms_conf_type_t
+ */
+ms_conf_type_t ms_get_conf_type(char *line)
+{
+ if (! memcmp(line, "key", strlen("key")))
+ {
+ return CONF_KEY;
+ }
+ else if (! memcmp(line, "value", strlen("value")))
+ {
+ return CONF_VALUE;
+ }
+ else if (! memcmp(line, "cmd", strlen("cmd")))
+ {
+ return CONF_CMD;
+ }
+ else
+ {
+ return CONF_NULL;
+ }
+} /* ms_get_conf_type */
+
+
+/**
+ * judge whether the line is a line with useful data. used to
+ * parse the configuration file.
+ *
+ * @param line, string of one line
+ *
+ * @return if success, return EXIT_FAILURE, else return EXIT_SUCCESS
+ */
+static int ms_is_line_data(char *line)
+{
+ assert(line != NULL);
+
+ char *begin_ptr= line;
+
+ while (isspace(*begin_ptr))
+ {
+ begin_ptr++;
+ }
+ if ((begin_ptr[0] == '\0') || (begin_ptr[0] == '#'))
+ return EXIT_SUCCESS;
+
+ return EXIT_FAILURE;
+} /* ms_is_line_data */
+
+
+/**
+ * function to bypass blank line and comments
+ *
+ * @param line, string of one line
+ * @param nread, length of the line
+ *
+ * @return if it's EOF or not line data, return EXIT_SUCCESS, else return EXIT_FAILURE
+ */
+static int ms_read_is_data(char *line, ssize_t nread)
+{
+ if ((nread == EOF) || ! ms_is_line_data(line))
+ return EXIT_SUCCESS;
+
+ return EXIT_FAILURE;
+} /* ms_read_is_data */
+
+
+/**
+ * if no configuration file, use this function to create the default
+ * configuration file.
+ */
+static void ms_no_config_file()
+{
+ char userpath[PATH_MAX];
+ struct passwd *usr= NULL;
+ FILE *fd;
+
+ usr= getpwuid(getuid());
+
+ snprintf(userpath, PATH_MAX, "%s/%s", usr->pw_dir, DEFAULT_CONFIG_NAME);
+
+ if (access (userpath, F_OK | R_OK) == 0)
+ goto exit;
+
+ fd= fopen(userpath, "w+");
+
+ if (fd == NULL)
+ {
+ fprintf(stderr, "Could not create default configure file %s\n", userpath);
+ perror(strerror(errno));
+ exit(1);
+ }
+ fprintf(fd, "%s", DEFAULT_CONGIF_STR);
+ fclose(fd);
+
+exit:
+ ms_setting.cfg_file= strdup(userpath);
+} /* ms_no_config_file */
+
+
+/**
+ * parse the configuration file
+ *
+ * @param cfg_file, the configuration file name
+ */
+static void ms_parse_cfg_file(char *cfg_file)
+{
+ FILE *f;
+ size_t start_len, end_len;
+ double proportion;
+ char *line= NULL;
+ size_t read_len;
+ ssize_t nread;
+ int cmd_type;
+ ms_conf_type_t conf_type;
+ int end_of_file= 0;
+ ms_key_distr_t *key_distr= NULL;
+ ms_value_distr_t *val_distr= NULL;
+
+ if (cfg_file == NULL)
+ {
+ ms_no_config_file();
+ cfg_file= ms_setting.cfg_file;
+ }
+
+ /*read key value configure file*/
+ if ((f= fopen(cfg_file, "r")) == NULL)
+ {
+ fprintf(stderr, "Can not open file: '%s'.\n", cfg_file);
+ exit(1);
+ }
+
+ while (1)
+ {
+ if ((((nread= getline(&line, &read_len, f)) == 1)
+ || ! ms_read_is_data(line, nread)) && (nread != EOF)) /* bypass blank line */
+ continue;
+
+ if (nread == EOF)
+ {
+ fprintf(stderr, "Bad configuration file, no configuration find.\n");
+ exit(1);
+ }
+ conf_type= ms_get_conf_type(line);
+ break;
+ }
+
+ while (! end_of_file)
+ {
+ switch (conf_type)
+ {
+ case CONF_KEY:
+ while (1)
+ {
+ if ((((nread= getline(&line, &read_len, f)) == 1)
+ || ! ms_read_is_data(line, nread)) && (nread != EOF)) /* bypass blank line */
+ continue;
+
+ if (nread != EOF)
+ {
+ if (sscanf(line, "%zu %zu %lf ", &start_len,
+ &end_len, &proportion) != 3)
+ {
+ conf_type= ms_get_conf_type(line);
+ break;
+ }
+ ms_setting.key_distr[ms_setting.key_rng_cnt].start_len= start_len;
+ ms_setting.key_distr[ms_setting.key_rng_cnt].end_len= end_len;
+ ms_setting.key_distr[ms_setting.key_rng_cnt].key_prop= proportion;
+ ms_setting.key_rng_cnt++;
+
+ if (ms_setting.key_rng_cnt >= ms_setting.total_key_rng_cnt)
+ {
+ key_distr= (ms_key_distr_t *)realloc(
+ ms_setting.key_distr,
+ (size_t)ms_setting.
+ total_key_rng_cnt * sizeof(ms_key_distr_t) * 2);
+ if (key_distr == NULL)
+ {
+ fprintf(stderr,
+ "Can't reallocate key distribution structure.\n");
+ exit(1);
+ }
+ ms_setting.key_distr= key_distr;
+ ms_setting.total_key_rng_cnt*= 2;
+ }
+ continue;
+ }
+ end_of_file= 1;
+ break;
+ }
+ break;
+
+ case CONF_VALUE:
+ while (1)
+ {
+ if ((((nread= getline(&line, &read_len, f)) == 1)
+ || ! ms_read_is_data(line, nread)) && (nread != EOF)) /* bypass blank line */
+ continue;
+
+ if (nread != EOF)
+ {
+ if (sscanf(line, "%zu %zu %lf", &start_len, &end_len,
+ &proportion) != 3)
+ {
+ conf_type= ms_get_conf_type(line);
+ break;
+ }
+ ms_setting.value_distr[ms_setting.val_rng_cnt].start_len=
+ start_len;
+ ms_setting.value_distr[ms_setting.val_rng_cnt].end_len= end_len;
+ ms_setting.value_distr[ms_setting.val_rng_cnt].value_prop=
+ proportion;
+ ms_setting.val_rng_cnt++;
+
+ if (ms_setting.val_rng_cnt >= ms_setting.total_val_rng_cnt)
+ {
+ val_distr= (ms_value_distr_t *)realloc(
+ ms_setting.value_distr,
+ (size_t)ms_setting.
+ total_val_rng_cnt * sizeof(ms_value_distr_t) * 2);
+ if (val_distr == NULL)
+ {
+ fprintf(stderr,
+ "Can't reallocate key distribution structure.\n");
+ exit(1);
+ }
+ ms_setting.value_distr= val_distr;
+ ms_setting.total_val_rng_cnt*= 2;
+ }
+ continue;
+ }
+ end_of_file= 1;
+ break;
+ }
+ break;
+
+ case CONF_CMD:
+ while (1)
+ {
+ if ((((nread= getline(&line, &read_len, f)) == 1)
+ || ! ms_read_is_data(line, nread)) && (nread != EOF)) /* bypass blank line */
+ continue;
+
+ if (nread != EOF)
+ {
+ if (sscanf(line, "%d %lf", &cmd_type, &proportion) != 2)
+ {
+ conf_type= ms_get_conf_type(line);
+ break;
+ }
+ if (cmd_type >= CMD_NULL)
+ {
+ continue;
+ }
+ ms_setting.cmd_distr[ms_setting.cmd_used_count].cmd_type=
+ cmd_type;
+ ms_setting.cmd_distr[ms_setting.cmd_used_count].cmd_prop=
+ proportion;
+ ms_setting.cmd_used_count++;
+ continue;
+ }
+ end_of_file= 1;
+ break;
+ }
+
+ case CONF_NULL:
+ while (1)
+ {
+ if ((((nread= getline(&line, &read_len, f)) == 1)
+ || ! ms_read_is_data(line, nread)) && (nread != EOF)) /* bypass blank line */
+ continue;
+
+ if (nread != EOF)
+ {
+ if ((conf_type= ms_get_conf_type(line)) != CONF_NULL)
+ {
+ break;
+ }
+ continue;
+ }
+ end_of_file= 1;
+ break;
+ }
+ break;
+
+ default:
+ assert(0);
+ break;
+ } /* switch */
+ }
+
+ fclose(f);
+
+ if (line != NULL)
+ {
+ free(line);
+ }
+} /* ms_parse_cfg_file */
+
+
+/* calculate the average size of key and value */
+static void ms_calc_avg_size()
+{
+ double avg_val_size= 0.0;
+ double avg_key_size= 0.0;
+ double val_pro= 0.0;
+ double key_pro= 0.0;
+ double averge_len= 0.0;
+ size_t start_len= 0;
+ size_t end_len= 0;
+
+ for (int j= 0; j < ms_setting.val_rng_cnt; j++)
+ {
+ val_pro= ms_setting.value_distr[j].value_prop;
+ start_len= ms_setting.value_distr[j].start_len;
+ end_len= ms_setting.value_distr[j].end_len;
+
+ averge_len= val_pro * ((double)(start_len + end_len)) / 2;
+ avg_val_size+= averge_len;
+ }
+
+ for (int j= 0; j < ms_setting.key_rng_cnt; j++)
+ {
+ key_pro= ms_setting.key_distr[j].key_prop;
+ start_len= ms_setting.key_distr[j].start_len;
+ end_len= ms_setting.key_distr[j].end_len;
+
+ averge_len= key_pro * ((double)(start_len + end_len)) / 2;
+ avg_key_size+= averge_len;
+ }
+
+ ms_setting.avg_val_size= (size_t)avg_val_size;
+ ms_setting.avg_key_size= (size_t)avg_key_size;
+} /* ms_calc_avg_size */
+
+
+/**
+ * used to shuffle key and value distribution array to ensure
+ * (key, value) pair with different set.
+ *
+ * @param distr, pointer of distribution structure array
+ * @param length, length of the array
+ *
+ * @return always return EXIT_SUCCESS
+ */
+static int ms_shuffle_distr(ms_distr_t *distr, int length)
+{
+ int i, j;
+ int tmp_offset;
+ size_t tmp_size;
+ int64_t rnd;
+
+ for (i= 0; i < length; i++)
+ {
+ rnd= random();
+ j= (int)(rnd % (length - i)) + i;
+
+ switch (rnd % 3)
+ {
+ case 0:
+ tmp_size= distr[j].key_size;
+ distr[j].key_size= distr[i].key_size;
+ distr[i].key_size= tmp_size;
+ break;
+
+ case 1:
+ tmp_offset= distr[j].key_offset;
+ distr[j].key_offset= distr[i].key_offset;
+ distr[i].key_offset= tmp_offset;
+ break;
+
+ case 2:
+ tmp_size= distr[j].value_size;
+ distr[j].value_size= distr[i].value_size;
+ distr[i].value_size= tmp_size;
+ break;
+
+ default:
+ break;
+ } /* switch */
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_shuffle_distr */
+
+
+/**
+ * according to the key and value distribution, to build the
+ * (key, value) pair distribution. the (key, value) pair
+ * distribution array is global, each connection set or get
+ * object keeping this distribution, for the final result, we
+ * can reach the expected key and value distribution.
+ */
+static void ms_build_distr()
+{
+ int offset= 0;
+ int end= 0;
+ int key_cnt= 0;
+ int value_cnt= 0;
+ size_t average_len= 0;
+ size_t diff_len= 0;
+ size_t start_len= 0;
+ size_t end_len= 0;
+ int rnd= 0;
+ ms_distr_t *distr= NULL;
+ int units= (int)ms_setting.win_size / UNIT_ITEMS_COUNT;
+
+ /* calculate average value size and key size */
+ ms_calc_avg_size();
+
+ ms_setting.char_blk_size= RAND_CHAR_SIZE;
+ int key_scope_size=
+ (int)((ms_setting.char_blk_size - RESERVED_RAND_CHAR_SIZE)
+ / UNIT_ITEMS_COUNT);
+
+ ms_setting.distr= (ms_distr_t *)malloc(
+ sizeof(ms_distr_t) * ms_setting.win_size);
+ if (ms_setting.distr == NULL)
+ {
+ fprintf(stderr, "Can't allocate distribution array.");
+ exit(1);
+ }
+
+ /**
+ * character block is divided by how many different key
+ * size, each different key size has the same size character
+ * range.
+ */
+ for (int m= 0; m < units; m++)
+ {
+ for (int i= 0; i < UNIT_ITEMS_COUNT; i++)
+ {
+ ms_setting.distr[m * UNIT_ITEMS_COUNT + i].key_offset=
+ ADDR_ALIGN(key_scope_size * i);
+ }
+ }
+
+ /* initialize key size distribution */
+ for (int m= 0; m < units; m++)
+ {
+ for (int j= 0; j < ms_setting.key_rng_cnt; j++)
+ {
+ key_cnt= (int)(UNIT_ITEMS_COUNT * ms_setting.key_distr[j].key_prop);
+ start_len= ms_setting.key_distr[j].start_len;
+ end_len= ms_setting.key_distr[j].end_len;
+ if ((start_len < MIN_KEY_SIZE) || (end_len < MIN_KEY_SIZE))
+ {
+ fprintf(stderr, "key length must be greater than 16 bytes.\n");
+ exit(1);
+ }
+
+ if (! ms_setting.binary_prot_
+ && ((start_len > MAX_KEY_SIZE) || (end_len > MAX_KEY_SIZE)))
+ {
+ fprintf(stderr, "key length must be less than 250 bytes.\n");
+ exit(1);
+ }
+
+ average_len= (start_len + end_len) / 2;
+ diff_len= (end_len - start_len) / 2;
+ for (int k= 0; k < key_cnt; k++)
+ {
+ if (offset >= (m + 1) * UNIT_ITEMS_COUNT)
+ {
+ break;
+ }
+ rnd= (int)random();
+ if (k % 2 == 0)
+ {
+ ms_setting.distr[offset].key_size=
+ (diff_len == 0) ? average_len :
+ average_len + (size_t)rnd
+ % diff_len;
+ }
+ else
+ {
+ ms_setting.distr[offset].key_size=
+ (diff_len == 0) ? average_len :
+ average_len - (size_t)rnd
+ % diff_len;
+ }
+ offset++;
+ }
+ }
+
+ if (offset < (m + 1) * UNIT_ITEMS_COUNT)
+ {
+ end= (m + 1) * UNIT_ITEMS_COUNT - offset;
+ for (int i= 0; i < end; i++)
+ {
+ ms_setting.distr[offset].key_size= ms_setting.avg_key_size;
+ offset++;
+ }
+ }
+ }
+ offset= 0;
+
+ /* initialize value distribution */
+ if (ms_setting.fixed_value_size != 0)
+ {
+ for (int i= 0; i < units * UNIT_ITEMS_COUNT; i++)
+ {
+ ms_setting.distr[i].value_size= ms_setting.fixed_value_size;
+ }
+ }
+ else
+ {
+ for (int m= 0; m < units; m++)
+ {
+ for (int j= 0; j < ms_setting.val_rng_cnt; j++)
+ {
+ value_cnt=
+ (int)(UNIT_ITEMS_COUNT * ms_setting.value_distr[j].value_prop);
+ start_len= ms_setting.value_distr[j].start_len;
+ end_len= ms_setting.value_distr[j].end_len;
+ if ((start_len <= 0) || (end_len <= 0))
+ {
+ fprintf(stderr, "value length must be greater than 0 bytes.\n");
+ exit(1);
+ }
+
+ if ((start_len > MAX_VALUE_SIZE) || (end_len > MAX_VALUE_SIZE))
+ {
+ fprintf(stderr, "key length must be less than or equal to 1M.\n");
+ exit(1);
+ }
+
+ average_len= (start_len + end_len) / 2;
+ diff_len= (end_len - start_len) / 2;
+ for (int k= 0; k < value_cnt; k++)
+ {
+ if (offset >= (m + 1) * UNIT_ITEMS_COUNT)
+ {
+ break;
+ }
+ rnd= (int)random();
+ if (k % 2 == 0)
+ {
+ ms_setting.distr[offset].value_size=
+ (diff_len == 0) ? average_len :
+ average_len
+ + (size_t)rnd % diff_len;
+ }
+ else
+ {
+ ms_setting.distr[offset].value_size=
+ (diff_len == 0) ? average_len :
+ average_len
+ - (size_t)rnd % diff_len;
+ }
+ offset++;
+ }
+ }
+
+ if (offset < (m + 1) * UNIT_ITEMS_COUNT)
+ {
+ end= (m + 1) * UNIT_ITEMS_COUNT - offset;
+ for (int i= 0; i < end; i++)
+ {
+ ms_setting.distr[offset++].value_size= ms_setting.avg_val_size;
+ }
+ }
+ }
+ }
+
+ /* shuffle distribution */
+ for (int i= 0; i < units; i++)
+ {
+ distr= &ms_setting.distr[i * UNIT_ITEMS_COUNT];
+ for (int j= 0; j < 4; j++)
+ {
+ ms_shuffle_distr(distr, UNIT_ITEMS_COUNT);
+ }
+ }
+} /* ms_build_distr */
+
+
+/**
+ * used to initialize the global character block. The character
+ * block is used to generate the suffix of the key and value. we
+ * only store a pointer in the character block for each key
+ * suffix or value string. It can save much memory to store key
+ * or value string.
+ */
+static void ms_init_random_block()
+{
+ char *ptr= NULL;
+
+ assert(ms_setting.char_blk_size > 0);
+
+ ms_setting.char_block= (char *)malloc(ms_setting.char_blk_size);
+ if (ms_setting.char_block == NULL)
+ {
+ fprintf(stderr, "Can't allocate global char block.");
+ exit(1);
+ }
+ ptr= ms_setting.char_block;
+
+ for (int i= 0; (size_t)i < ms_setting.char_blk_size; i++)
+ {
+ *(ptr++)= ALPHANUMBERICS[random() % CHAR_COUNT];
+ }
+} /* ms_init_random_block */
+
+
+/**
+ * after initialization, call this function to output the main
+ * configuration user specified.
+ */
+static void ms_print_setting()
+{
+ fprintf(stdout, "servers : %s\n", ms_setting.srv_str);
+ fprintf(stdout, "threads count: %d\n", ms_setting.nthreads);
+ fprintf(stdout, "concurrency: %d\n", ms_setting.nconns);
+ if (ms_setting.run_time > 0)
+ {
+ fprintf(stdout, "run time: %ds\n", ms_setting.run_time);
+ }
+ else
+ {
+ fprintf(stdout, "execute number: %" PRId64 "\n", ms_setting.exec_num);
+ }
+ fprintf(stdout, "windows size: %" PRId64 "k\n",
+ (int64_t)(ms_setting.win_size / 1024));
+ fprintf(stdout, "set proportion: set_prop=%.2f\n",
+ ms_setting.cmd_distr[CMD_SET].cmd_prop);
+ fprintf(stdout, "get proportion: get_prop=%.2f\n",
+ ms_setting.cmd_distr[CMD_GET].cmd_prop);
+ fflush(stdout);
+} /* ms_print_setting */
+
+
+/**
+ * previous part of slap mode initialization of setting structure
+ */
+static void ms_setting_slapmode_init_pre()
+{
+ ms_setting.exec_num= DEFAULT_EXE_NUM;
+ ms_setting.verify_percent= DEFAULT_VERIFY_RATE;
+ ms_setting.exp_ver_per= DEFAULT_VERIFY_RATE;
+ ms_setting.overwrite_percent= DEFAULT_OVERWRITE_RATE;
+ ms_setting.mult_key_num= DEFAULT_DIV;
+ ms_setting.fixed_value_size= 0;
+ ms_setting.win_size= DEFAULT_WINDOW_SIZE;
+ ms_setting.udp= false;
+ ms_setting.reconnect= false;
+ ms_setting.verbose= false;
+ ms_setting.facebook_test= false;
+ ms_setting.binary_prot_= false;
+ ms_setting.stat_freq= 0;
+ ms_setting.srv_str= NULL;
+ ms_setting.cfg_file= NULL;
+ ms_setting.sock_per_conn= DEFAULT_SOCK_PER_CONN;
+ ms_setting.expected_tps= 0;
+ ms_setting.rep_write_srv= 0;
+} /* ms_setting_slapmode_init_pre */
+
+
+/**
+ * previous part of initialization of setting structure
+ */
+void ms_setting_init_pre()
+{
+ memset(&ms_setting, 0, sizeof(ms_setting));
+
+ /* common initialize */
+ ms_setting.ncpu= ms_get_cpu_count();
+ ms_setting.nthreads= DEFAULT_THREADS_NUM;
+ ms_setting.nconns= DEFAULT_CONNS_NUM;
+ ms_setting.run_time= DEFAULT_RUN_TIME;
+ ms_setting.total_srv_cnt= MCD_SRVS_NUM_INIT;
+ ms_setting.servers= (ms_mcd_server_t *)malloc(
+ (size_t)ms_setting.total_srv_cnt
+ * sizeof(ms_mcd_server_t));
+ if (ms_setting.servers == NULL)
+ {
+ fprintf(stderr, "Can't allocate servers structure.\n");
+ exit(1);
+ }
+
+ ms_setting_slapmode_init_pre();
+} /* ms_setting_init_pre */
+
+
+/**
+ * post part of slap mode initialization of setting structure
+ */
+static void ms_setting_slapmode_init_post()
+{
+ ms_setting.total_key_rng_cnt= KEY_RANGE_COUNT_INIT;
+ ms_setting.key_distr=
+ (ms_key_distr_t *)malloc((size_t)ms_setting.total_key_rng_cnt * sizeof(ms_key_distr_t));
+
+ if (ms_setting.key_distr == NULL)
+ {
+ fprintf(stderr, "Can't allocate key distribution structure.\n");
+ exit(1);
+ }
+
+ ms_setting.total_val_rng_cnt= VALUE_RANGE_COUNT_INIT;
+
+ ms_setting.value_distr=
+ (ms_value_distr_t *)malloc((size_t)ms_setting.total_val_rng_cnt * sizeof( ms_value_distr_t));
+
+ if (ms_setting.value_distr == NULL)
+ {
+ fprintf(stderr, "Can't allocate value distribution structure.\n");
+ exit(1);
+ }
+
+ ms_parse_cfg_file(ms_setting.cfg_file);
+
+ /* run time mode */
+ if ((ms_setting.exec_num == 0) && (ms_setting.run_time != 0))
+ {
+ ms_setting.exec_num= (int64_t)MAX_EXEC_NUM;
+ }
+ else
+ {
+ /* execute number mode */
+ ms_setting.run_time= 0;
+ }
+
+ if (ms_setting.rep_write_srv > 0)
+ {
+ /* for replication test, need enable reconnect feature */
+ ms_setting.reconnect= true;
+ }
+
+ if (ms_setting.facebook_test && (ms_setting.mult_key_num < 2))
+ {
+ fprintf(stderr, "facebook test must work with multi-get, "
+ "please specify multi-get key number "
+ "with '--division' option.\n");
+ exit(1);
+ }
+
+ if (ms_setting.facebook_test && ms_setting.udp)
+ {
+ fprintf(stderr, "facebook test couldn't work with UDP.\n");
+ exit(1);
+ }
+
+ if (ms_setting.udp && (ms_setting.sock_per_conn > 1))
+ {
+ fprintf(stderr, "UDP doesn't support multi-socks "
+ "in one connection structure.\n");
+ exit(1);
+ }
+
+ if ((ms_setting.rep_write_srv > 0) && (ms_setting.srv_cnt < 2))
+ {
+ fprintf(stderr, "Please specify 2 servers at least for replication\n");
+ exit(1);
+ }
+
+ if ((ms_setting.rep_write_srv > 0)
+ && (ms_setting.srv_cnt < ms_setting.rep_write_srv))
+ {
+ fprintf(stderr, "Servers to do replication writing "
+ "is larger than the total servers\n");
+ exit(1);
+ }
+
+ if (ms_setting.udp && (ms_setting.rep_write_srv > 0))
+ {
+ fprintf(stderr, "UDP doesn't support replication.\n");
+ exit(1);
+ }
+
+ if (ms_setting.facebook_test && (ms_setting.rep_write_srv > 0))
+ {
+ fprintf(stderr, "facebook test couldn't work with replication.\n");
+ exit(1);
+ }
+
+ ms_build_distr();
+
+ /* initialize global character block */
+ ms_init_random_block();
+ ms_print_setting();
+} /* ms_setting_slapmode_init_post */
+
+
+/**
+ * post part of initialization of setting structure
+ */
+void ms_setting_init_post()
+{
+ ms_get_serverlist(ms_setting.srv_str);
+ ms_setting_slapmode_init_post();
+}
+
+
+/**
+ * clean up the global setting structure
+ */
+void ms_setting_cleanup()
+{
+ if (ms_setting.distr != NULL)
+ {
+ free(ms_setting.distr);
+ }
+
+ if (ms_setting.char_block != NULL)
+ {
+ free(ms_setting.char_block);
+ }
+
+ if (ms_setting.srv_str != NULL)
+ {
+ free(ms_setting.srv_str);
+ }
+
+ if (ms_setting.cfg_file != NULL)
+ {
+ free(ms_setting.cfg_file);
+ }
+
+ if (ms_setting.servers != NULL)
+ {
+ free(ms_setting.servers);
+ }
+
+ if (ms_setting.key_distr != NULL)
+ {
+ free(ms_setting.key_distr);
+ }
+
+ if (ms_setting.value_distr != NULL)
+ {
+ free(ms_setting.value_distr);
+ }
+} /* ms_setting_cleanup */
--- /dev/null
+/*
+ * File: ms_setting.h
+ * Author: Mingqiang Zhuang
+ *
+ * Created on February 10, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ */
+#ifndef MS_SETTING_H
+#define MS_SETTING_H
+
+#include "ms_memslap.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define MCD_SRVS_NUM_INIT 8
+#define MCD_HOST_LENGTH 64
+#define KEY_RANGE_COUNT_INIT 8
+#define VALUE_RANGE_COUNT_INIT 8
+#define PROP_ERROR 0.001
+
+#define MIN_KEY_SIZE 16
+#define MAX_KEY_SIZE 250
+#define MAX_VALUE_SIZE (1024 * 1024)
+
+/* the content of the configuration file for memslap running without configuration file */
+#define DEFAULT_CONGIF_STR \
+ "key\n" \
+ "64 64 1\n" \
+ "value\n" \
+ "1024 1024 1\n" \
+ "cmd\n" \
+ "0 0.1\n" \
+ "1 0.9"
+
+/* Used to parse the value length return by server and path string */
+typedef struct token_s
+{
+ char *value;
+ size_t length;
+} token_t;
+
+#define MAX_TOKENS 10
+
+/* server information */
+typedef struct mcd_server
+{
+ char srv_host_name[MCD_HOST_LENGTH]; /* host name of server */
+ int srv_port; /* server port */
+
+ /* for calculating how long the server disconnects */
+ ATOMIC uint32_t disconn_cnt; /* number of disconnections count */
+ ATOMIC uint32_t reconn_cnt; /* number of reconnections count */
+ struct timeval disconn_time; /* start time of disconnection */
+ struct timeval reconn_time; /* end time of reconnection */
+} ms_mcd_server_t;
+
+/* information of an item distribution including key and value */
+typedef struct distr
+{
+ size_t key_size; /* size of key */
+ int key_offset; /* offset of one key in character block */
+ size_t value_size; /* size of value */
+} ms_distr_t;
+
+/* information of key distribution */
+typedef struct key_distr
+{
+ size_t start_len; /* start of the key length range */
+ size_t end_len; /* end of the key length range */
+ double key_prop; /* key proportion */
+} ms_key_distr_t;
+
+/* information of value distribution */
+typedef struct value_distr
+{
+ size_t start_len; /* start of the value length range */
+ size_t end_len; /* end of the value length range */
+ double value_prop; /* value proportion */
+} ms_value_distr_t;
+
+/* memcached command types */
+typedef enum cmd_type
+{
+ CMD_SET,
+ CMD_GET,
+ CMD_NULL
+} ms_cmd_type_t;
+
+/* types in the configuration file */
+typedef enum conf_type
+{
+ CONF_KEY,
+ CONF_VALUE,
+ CONF_CMD,
+ CONF_NULL
+} ms_conf_type_t;
+
+/* information of command distribution */
+typedef struct cmd_distr
+{
+ ms_cmd_type_t cmd_type; /* command type */
+ double cmd_prop; /* proportion of the command */
+} ms_cmd_distr_t;
+
+/* global setting structure */
+typedef struct setting
+{
+ uint32_t ncpu; /* cpu count of this system */
+ uint32_t nthreads; /* total thread count, must equal or less than cpu cores */
+ uint32_t nconns; /* total conn count, must multiply by total thread count */
+ int64_t exec_num; /* total execute number */
+ int run_time; /* total run time */
+
+ uint32_t char_blk_size; /* global character block size */
+ char *char_block; /* global character block with random character */
+ ms_distr_t *distr; /* distribution from configure file */
+
+ char *srv_str; /* string includes servers information */
+ char *cfg_file; /* configure file name */
+
+ ms_mcd_server_t *servers; /* servers array */
+ uint32_t total_srv_cnt; /* total servers count of the servers array */
+ uint32_t srv_cnt; /* servers count */
+
+ ms_key_distr_t *key_distr; /* array of key distribution */
+ int total_key_rng_cnt; /* total key range count of the array */
+ int key_rng_cnt; /* actual key range count */
+
+ ms_value_distr_t *value_distr; /* array of value distribution */
+ int total_val_rng_cnt; /* total value range count of the array */
+ int val_rng_cnt; /* actual value range count */
+
+ ms_cmd_distr_t cmd_distr[CMD_NULL]; /* total we have CMD_NULL commands */
+ int cmd_used_count; /* supported command count */
+
+ size_t fixed_value_size; /* fixed value size */
+ size_t avg_val_size; /* average value size */
+ size_t avg_key_size; /* average value size */
+
+ double verify_percent; /* percent of data verification */
+ double exp_ver_per; /* percent of data verification with expire time */
+ double overwrite_percent; /* percent of overwrite */
+ int mult_key_num; /* number of keys used by multi-get once */
+ size_t win_size; /* item window size per connection */
+ bool udp; /* whether or not use UDP */
+ int stat_freq; /* statistic frequency second */
+ bool reconnect; /* whether it reconnect when connection close */
+ bool verbose; /* whether it outputs detailed information when verification */
+ bool facebook_test; /* facebook test, TCP set and multi-get with UDP */
+ uint32_t sock_per_conn; /* number of socks per connection structure */
+ bool binary_prot_; /* whether it use binary protocol */
+ int expected_tps; /* expected throughput */
+ uint32_t rep_write_srv; /* which servers are used to do replication writing */
+} ms_setting_st;
+
+extern ms_setting_st ms_setting;
+
+/* previous part of initialization of setting structure */
+void ms_setting_init_pre(void);
+
+
+/* post part of initialization of setting structure */
+void ms_setting_init_post(void);
+
+
+/* clean up the global setting structure */
+void ms_setting_cleanup(void);
+
+
+#define UNUSED_ARGUMENT(x) (void)x
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* end of MS_SETTING_H */
--- /dev/null
+/*
+ * File: ms_sigsegv.c
+ * Author: Mingqiang Zhuang
+ *
+ * Created on March 15, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ * Rewrite of stack dump:
+ * Copyright (C) 2009 Sun Microsystems
+ * Author Trond Norbye
+ */
+
+#include "mem_config.h"
+
+#include <memory.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <signal.h>
+#include <pthread.h>
+
+#include "ms_memslap.h"
+#include "ms_setting.h"
+
+/* prototypes */
+int ms_setup_sigsegv(void);
+int ms_setup_sigpipe(void);
+int ms_setup_sigint(void);
+
+
+/* signal seg reaches, this function will run */
+static void ms_signal_segv(int signum, siginfo_t *info, void *ptr)
+{
+ UNUSED_ARGUMENT(signum);
+ UNUSED_ARGUMENT(info);
+ UNUSED_ARGUMENT(ptr);
+
+ pthread_mutex_lock(&ms_global.quit_mutex);
+ fprintf(stderr, "Segmentation fault occurred.\nStack trace:\n");
+#if 0
+ pandora_print_callstack(stderr);
+#endif
+ fprintf(stderr, "End of stack trace\n");
+ pthread_mutex_unlock(&ms_global.quit_mutex);
+ abort();
+}
+
+/* signal int reaches, this function will run */
+static void ms_signal_int(int signum, siginfo_t *info, void *ptr)
+{
+ UNUSED_ARGUMENT(signum);
+ UNUSED_ARGUMENT(info);
+ UNUSED_ARGUMENT(ptr);
+
+ pthread_mutex_lock(&ms_global.quit_mutex);
+ fprintf(stderr, "SIGINT handled.\n");
+ pthread_mutex_unlock(&ms_global.quit_mutex);
+ exit(1);
+} /* ms_signal_int */
+
+
+/**
+ * redirect signal seg
+ *
+ * @return if success, return EXIT_SUCCESS, else return -1
+ */
+int ms_setup_sigsegv(void)
+{
+ struct sigaction action;
+
+ memset(&action, 0, sizeof(action));
+ action.sa_sigaction= ms_signal_segv;
+ action.sa_flags= SA_SIGINFO;
+ if (sigaction(SIGSEGV, &action, NULL) < 0)
+ {
+ perror("sigaction");
+ return EXIT_SUCCESS;
+ }
+
+ return -1;
+} /* ms_setup_sigsegv */
+
+
+/**
+ * redirect signal pipe
+ *
+ * @return if success, return EXIT_SUCCESS, else return -1
+ */
+int ms_setup_sigpipe(void)
+{
+ /* ignore the SIGPIPE signal */
+ signal(SIGPIPE, SIG_IGN);
+
+ return -1;
+} /* ms_setup_sigpipe */
+
+
+/**
+ * redirect signal int
+ *
+ * @return if success, return EXIT_SUCCESS, else return -1
+ */
+int ms_setup_sigint(void)
+{
+ struct sigaction action_3;
+
+ memset(&action_3, 0, sizeof(action_3));
+ action_3.sa_sigaction= ms_signal_int;
+ action_3.sa_flags= SA_SIGINFO;
+ if (sigaction(SIGINT, &action_3, NULL) < 0)
+ {
+ perror("sigaction");
+ return EXIT_SUCCESS;
+ }
+
+ return -1;
+} /* ms_setup_sigint */
+
+
+#ifndef SIGSEGV_NO_AUTO_INIT
+static void __attribute((constructor)) ms_init(void)
+{
+ ms_setup_sigsegv();
+ ms_setup_sigpipe();
+ ms_setup_sigint();
+}
+#endif
--- /dev/null
+/*
+ * File: ms_sigsegv.h
+ * Author: Mingqiang Zhuang
+ *
+ * Created on March 15, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ */
+#ifndef MS_SIGSEGV_H
+#define MS_SIGSEGV_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* redirect signal seg */
+int ms_setup_sigsegv(void);
+
+
+/* redirect signal pipe */
+int ms_setup_sigpipe(void);
+
+
+/* redirect signal int */
+int ms_setup_sigint(void);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* end of MS_SIGSEGV_H */
--- /dev/null
+/*
+ * File: ms_stats.h
+ * Author: Mingqiang Zhuang
+ *
+ * Created on March 25, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ */
+
+#include "mem_config.h"
+
+#include <inttypes.h>
+#include "ms_stats.h"
+
+#define array_size(x) (sizeof(x) / sizeof((x)[0]))
+
+static int ms_local_log2(uint64_t value);
+static uint64_t ms_get_events(ms_stat_t *stat);
+
+
+/**
+ * get the index of local log2 array
+ *
+ * @param value
+ *
+ * @return return the index of local log2 array
+ */
+static int ms_local_log2(uint64_t value)
+{
+ int result= 0;
+
+ while (result <= 63 && ((uint64_t)1 << result) < value)
+ {
+ result++;
+ }
+
+ return result;
+} /* ms_local_log2 */
+
+
+/**
+ * initialize statistic structure
+ *
+ * @param stat, pointer of the statistic structure
+ * @param name, name of the statistic
+ */
+void ms_init_stats(ms_stat_t *stat, const char *name)
+{
+ memset(stat, 0, sizeof(*stat));
+
+ stat->name= (char *)name;
+ stat->min_time= (uint64_t)-1;
+ stat->max_time= 0;
+ stat->period_min_time= (uint64_t)-1;
+ stat->period_max_time= 0;
+ stat->log_product= 0;
+ stat->total_time= 0;
+ stat->pre_total_time= 0;
+ stat->squares= 0;
+ stat->pre_squares= 0;
+ stat->pre_events= 0;
+ stat->pre_log_product= 0;
+ stat->get_miss= 0;
+ stat->pre_get_miss= 0;
+} /* ms_init_stats */
+
+
+/**
+ * record one event
+ *
+ * @param stat, pointer of the statistic structure
+ * @param total_time, response time of the command
+ * @param get_miss, whether it gets miss
+ */
+void ms_record_event(ms_stat_t *stat, uint64_t total_time, int get_miss)
+{
+ stat->total_time+= total_time;
+
+ if (total_time < stat->min_time)
+ {
+ stat->min_time= total_time;
+ }
+
+ if (total_time > stat->max_time)
+ {
+ stat->max_time= total_time;
+ }
+
+ if (total_time < stat->period_min_time)
+ {
+ stat->period_min_time= total_time;
+ }
+
+ if (total_time > stat->period_max_time)
+ {
+ stat->period_max_time= total_time;
+ }
+
+ if (get_miss)
+ {
+ stat->get_miss++;
+ }
+
+ stat->dist[ms_local_log2(total_time)]++;
+ stat->squares+= (double)(total_time * total_time);
+
+ if (total_time != 0)
+ {
+ stat->log_product+= log((double)total_time);
+ }
+} /* ms_record_event */
+
+
+/**
+ * get the events count
+ *
+ * @param stat, pointer of the statistic structure
+ *
+ * @return total events recorded
+ */
+static uint64_t ms_get_events(ms_stat_t *stat)
+{
+ uint64_t events= 0;
+
+ for (uint32_t i= 0; i < array_size(stat->dist); i++)
+ {
+ events+= stat->dist[i];
+ }
+
+ return events;
+} /* ms_get_events */
+
+
+/**
+ * dump the statistics
+ *
+ * @param stat, pointer of the statistic structure
+ */
+void ms_dump_stats(ms_stat_t *stat)
+{
+ uint64_t events= 0;
+ int max_non_zero= 0;
+ int min_non_zero= 0;
+ double average= 0;
+
+ for (uint32_t i= 0; i < array_size(stat->dist); i++)
+ {
+ events+= stat->dist[i];
+ if (stat->dist[i] != 0)
+ {
+ max_non_zero= (int)i;
+ }
+ }
+
+ if (events == 0)
+ {
+ return;
+ }
+ average= (double)(stat->total_time / events);
+
+ printf("%s Statistics (%lld events)\n", stat->name, (long long)events);
+ printf(" Min: %8lld\n", (long long)stat->min_time);
+ printf(" Max: %8lld\n", (long long)stat->max_time);
+ printf(" Avg: %8lld\n", (long long)(stat->total_time / events));
+ printf(" Geo: %8.2lf\n", exp(stat->log_product / (double)events));
+
+ if (events > 1)
+ {
+ printf(" Std: %8.2lf\n",
+ sqrt((stat->squares - (double)events * average
+ * average) / ((double)events - 1)));
+ }
+ printf(" Log2 Dist:");
+
+ for (int i= 0; i <= max_non_zero - 4; i+= 4)
+ {
+ if ((stat->dist[i + 0] != 0)
+ || (stat->dist[i + 1] != 0)
+ || (stat->dist[i + 2] != 0)
+ || (stat->dist[i + 3] != 0))
+ {
+ min_non_zero= i;
+ break;
+ }
+ }
+
+ for (int i= min_non_zero; i <= max_non_zero; i++)
+ {
+ if ((i % 4) == 0)
+ {
+ printf("\n %2d:", (int)i);
+ }
+ printf(" %6" PRIu64 , stat->dist[i]);
+ }
+
+ printf("\n\n");
+} /* ms_dump_stats */
+
+
+/**
+ * dump the format statistics
+ *
+ * @param stat, pointer of the statistic structure
+ * @param run_time, the total run time
+ * @param freq, statistic frequency
+ * @param obj_size, average object size
+ */
+void ms_dump_format_stats(ms_stat_t *stat,
+ int run_time,
+ int freq,
+ int obj_size)
+{
+ uint64_t events= 0;
+ double global_average= 0;
+ uint64_t global_tps= 0;
+ double global_rate= 0;
+ double global_std= 0;
+ double global_log= 0;
+
+ double period_average= 0;
+ uint64_t period_tps= 0;
+ double period_rate= 0;
+ double period_std= 0;
+ double period_log= 0;
+
+ if ((events= ms_get_events(stat)) == 0)
+ {
+ return;
+ }
+
+ global_average= (double)(stat->total_time / events);
+ global_tps= events / (uint64_t)run_time;
+ global_rate= (double)events * obj_size / 1024 / 1024 / run_time;
+ global_std= sqrt((stat->squares - (double)events * global_average
+ * global_average) / (double)(events - 1));
+ global_log= exp(stat->log_product / (double)events);
+
+ uint64_t diff_time= stat->total_time - stat->pre_total_time;
+ uint64_t diff_events= events - stat->pre_events;
+ if (diff_events >= 1)
+ {
+ period_average= (double)(diff_time / diff_events);
+ period_tps= diff_events / (uint64_t)freq;
+ period_rate= (double)diff_events * obj_size / 1024 / 1024 / freq;
+ double diff_squares= (double)stat->squares - (double)stat->pre_squares;
+ period_std= sqrt((diff_squares - (double)diff_events * period_average
+ * period_average) / (double)(diff_events - 1));
+ double diff_log_product= stat->log_product - stat->pre_log_product;
+ period_log= exp(diff_log_product / (double)diff_events);
+ }
+
+ printf("%s Statistics\n", stat->name);
+ printf("%-8s %-8s %-12s %-12s %-10s %-10s %-8s %-10s %-10s %-10s %-10s\n",
+ "Type",
+ "Time(s)",
+ "Ops",
+ "TPS(ops/s)",
+ "Net(M/s)",
+ "Get_miss",
+ "Min(us)",
+ "Max(us)",
+ "Avg(us)",
+ "Std_dev",
+ "Geo_dist");
+
+ printf(
+ "%-8s %-8d %-12llu %-12lld %-10.1f %-10lld %-8lld %-10lld %-10lld %-10.2f %.2f\n",
+ "Period",
+ freq,
+ (long long)diff_events,
+ (long long)period_tps,
+ global_rate,
+ (long long)(stat->get_miss - stat->pre_get_miss),
+ (long long)stat->period_min_time,
+ (long long)stat->period_max_time,
+ (long long)period_average,
+ period_std,
+ period_log);
+
+ printf(
+ "%-8s %-8d %-12llu %-12lld %-10.1f %-10lld %-8lld %-10lld %-10lld %-10.2f %.2f\n\n",
+ "Global",
+ run_time,
+ (long long)events,
+ (long long)global_tps,
+ period_rate,
+ (long long)stat->get_miss,
+ (long long)stat->min_time,
+ (long long)stat->max_time,
+ (long long)global_average,
+ global_std,
+ global_log);
+
+ stat->pre_events= events;
+ stat->pre_squares= (uint64_t)stat->squares;
+ stat->pre_total_time= stat->total_time;
+ stat->pre_log_product= stat->log_product;
+ stat->period_min_time= (uint64_t)-1;
+ stat->period_max_time= 0;
+ stat->pre_get_miss= stat->get_miss;
+} /* ms_dump_format_stats */
--- /dev/null
+/*
+ * File: ms_stats.h
+ * Author: Mingqiang Zhuang
+ *
+ * Created on March 25, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ */
+#ifndef MS_STAT_H
+#define MS_STAT_H
+
+#include <math.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* statistic structure of response time */
+typedef struct
+{
+ char *name;
+ uint64_t total_time;
+ uint64_t min_time;
+ uint64_t max_time;
+ uint64_t get_miss;
+ uint64_t dist[65];
+ double squares;
+ double log_product;
+
+ uint64_t period_min_time;
+ uint64_t period_max_time;
+ uint64_t pre_get_miss;
+ uint64_t pre_events;
+ uint64_t pre_total_time;
+ uint64_t pre_squares;
+ double pre_log_product;
+} ms_stat_t;
+
+/* initialize statistic */
+void ms_init_stats(ms_stat_t *stat, const char *name);
+
+
+/* record one event */
+void ms_record_event(ms_stat_t *stat, uint64_t time, int get_miss);
+
+
+/* dump the statistics */
+void ms_dump_stats(ms_stat_t *stat);
+
+
+/* dump the format statistics */
+void ms_dump_format_stats(ms_stat_t *stat,
+ int run_time,
+ int freq,
+ int obj_size);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MS_STAT_H */
--- /dev/null
+/*
+ * File: ms_task.c
+ * Author: Mingqiang Zhuang
+ *
+ * Created on February 10, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ */
+
+#include "mem_config.h"
+
+#if defined(HAVE_SYS_TIME_H)
+# include <sys/time.h>
+#endif
+
+#if defined(HAVE_TIME_H)
+# include <time.h>
+#endif
+
+#include "ms_thread.h"
+#include "ms_setting.h"
+#include "ms_atomic.h"
+
+/* command distribution adjustment cycle */
+#define CMD_DISTR_ADJUST_CYCLE 1000
+#define DISADJUST_FACTOR 0.03 /**
+ * In one adjustment cycle, if undo set or get
+ * operations proportion is more than 3% , means
+ * there are too many new item or need more new
+ * item in the window. This factor shows it.
+ */
+
+/* get item from task window */
+static ms_task_item_t *ms_get_cur_opt_item(ms_conn_t *c);
+static ms_task_item_t *ms_get_next_get_item(ms_conn_t *c);
+static ms_task_item_t *ms_get_next_set_item(ms_conn_t *c);
+static ms_task_item_t *ms_get_random_overwrite_item(ms_conn_t *c);
+
+
+/* select next operation to do */
+static void ms_select_opt(ms_conn_t *c, ms_task_t *task);
+
+
+/* set and get speed estimate for controlling and adjustment */
+static bool ms_is_set_too_fast(ms_task_t *task);
+static bool ms_is_get_too_fast(ms_task_t *task);
+static void ms_kick_out_item(ms_task_item_t *item);
+
+
+/* miss rate adjustment */
+static bool ms_need_overwrite_item(ms_task_t *task);
+static bool ms_adjust_opt(ms_conn_t *c, ms_task_t *task);
+
+
+/* deal with data verification initialization */
+static void ms_task_data_verify_init(ms_task_t *task);
+static void ms_task_expire_verify_init(ms_task_t *task);
+
+
+/* select a new task to do */
+static ms_task_t *ms_get_task(ms_conn_t *c, bool warmup);
+
+
+/* run the selected task */
+static void ms_update_set_result(ms_conn_t *c, ms_task_item_t *item);
+static void ms_update_stat_result(ms_conn_t *c);
+static void ms_update_multi_get_result(ms_conn_t *c);
+static void ms_update_single_get_result(ms_conn_t *c, ms_task_item_t *item);
+static void ms_update_task_result(ms_conn_t *c);
+static void ms_single_getset_task_sch(ms_conn_t *c);
+static void ms_multi_getset_task_sch(ms_conn_t *c);
+static void ms_send_signal(ms_sync_lock_t *sync_lock);
+static void ms_warmup_server(ms_conn_t *c);
+static int ms_run_getset_task(ms_conn_t *c);
+
+
+/**
+ * used to get the current operation item(object)
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return ms_task_item_t*, current operating item
+ */
+static ms_task_item_t *ms_get_cur_opt_item(ms_conn_t *c)
+{
+ return c->curr_task.item;
+}
+
+
+/**
+ * used to get the next item to do get operation
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return ms_task_item_t*, the pointer of the next item to do
+ * get operation
+ */
+static ms_task_item_t *ms_get_next_get_item(ms_conn_t *c)
+{
+ ms_task_item_t *item= NULL;
+
+ if (c->set_cursor <= 0)
+ {
+ /* the first item in the window */
+ item= &c->item_win[0];
+ }
+ else if (c->set_cursor > 0 && c->set_cursor < (uint32_t)c->win_size)
+ {
+ /* random get one item set before */
+ item= &c->item_win[random() % (int64_t)c->set_cursor];
+ }
+ else
+ {
+ /* random get one item from the window */
+ item= &c->item_win[random() % c->win_size];
+ }
+
+ return item;
+} /* ms_get_next_get_item */
+
+
+/**
+ * used to get the next item to do set operation
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return ms_task_item_t*, the pointer of the next item to do
+ * set operation
+ */
+static ms_task_item_t *ms_get_next_set_item(ms_conn_t *c)
+{
+ /**
+ * when a set command successes, the cursor will plus 1. If set
+ * fails, the cursor doesn't change. it isn't necessary to
+ * increase the cursor here.
+ */
+ return &c->item_win[(int64_t)c->set_cursor % c->win_size];
+}
+
+
+/**
+ * If we need do overwrite, we could select a item set before.
+ * This function is used to get a item set before to do
+ * overwrite.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return ms_task_item_t*, the pointer of the previous item of
+ * set operation
+ */
+static ms_task_item_t *ms_get_random_overwrite_item(ms_conn_t *c)
+{
+ return ms_get_next_get_item(c);
+} /* ms_get_random_overwrite_item */
+
+/**
+ * According to the proportion of operations(get or set), select
+ * an operation to do.
+ *
+ * @param c, pointer of the concurrency
+ * @param task, pointer of current task in the concurrency
+ */
+static void ms_select_opt(ms_conn_t *c, ms_task_t *task)
+{
+ double get_prop= ms_setting.cmd_distr[CMD_GET].cmd_prop;
+ double set_prop= ms_setting.cmd_distr[CMD_SET].cmd_prop;
+
+ /* update cycle operation number if necessary */
+ if ((task->cycle_undo_get == 0) || (task->cycle_undo_set == 0))
+ {
+ task->cycle_undo_get+= (int)(CMD_DISTR_ADJUST_CYCLE * get_prop);
+ task->cycle_undo_set+= (int)(CMD_DISTR_ADJUST_CYCLE * set_prop);
+ }
+
+ /**
+ * According to operation distribution to choose doing which
+ * operation. If it can't set new object to sever, just change
+ * to do get operation.
+ */
+ if ((set_prop > PROP_ERROR)
+ && ((double)task->get_opt * set_prop >= (double)task->set_opt
+ * get_prop))
+ {
+ task->cmd= CMD_SET;
+ task->item= ms_get_next_set_item(c);
+ }
+ else
+ {
+ task->cmd= CMD_GET;
+ task->item= ms_get_next_get_item(c);
+ }
+} /* ms_select_opt */
+
+
+/**
+ * used to judge whether the number of get operations done is
+ * more than expected number of get operations to do right now.
+ *
+ * @param task, pointer of current task in the concurrency
+ *
+ * @return bool, if get too fast, return true, else return false
+ */
+static bool ms_is_get_too_fast(ms_task_t *task)
+{
+ double get_prop= ms_setting.cmd_distr[CMD_GET].cmd_prop;
+ double set_prop= ms_setting.cmd_distr[CMD_SET].cmd_prop;
+
+ /* no get operation */
+ if (get_prop < PROP_ERROR)
+ {
+ return false;
+ }
+
+ int max_undo_set= (int)(set_prop / get_prop * (1.0 + DISADJUST_FACTOR))
+ * task->cycle_undo_get;
+
+ if (((double)task->get_opt * set_prop > (double)task->set_opt * get_prop)
+ && (task->cycle_undo_set > max_undo_set))
+ {
+ return true;
+ }
+
+ return false;
+} /* ms_is_get_too_fast */
+
+
+/**
+ * used to judge whether the number of set operations done is
+ * more than expected number of set operations to do right now.
+ *
+ * @param task, pointer of current task in the concurrency
+ *
+ * @return bool, if set too fast, return true, else return false
+ */
+static bool ms_is_set_too_fast(ms_task_t *task)
+{
+ double get_prop= ms_setting.cmd_distr[CMD_GET].cmd_prop;
+ double set_prop= ms_setting.cmd_distr[CMD_SET].cmd_prop;
+
+ /* no set operation */
+ if (set_prop < PROP_ERROR)
+ {
+ return false;
+ }
+
+ /* If it does set operation too fast, skip some */
+ int max_undo_get= (int)((get_prop / set_prop * (1.0 + DISADJUST_FACTOR))
+ * (double)task->cycle_undo_set);
+
+ if (((double)task->get_opt * set_prop < (double)task->set_opt * get_prop)
+ && (task->cycle_undo_get > max_undo_get))
+ {
+ return true;
+ }
+
+ return false;
+} /* ms_is_set_too_fast */
+
+
+/**
+ * kick out the old item in the window, and add a new item to
+ * overwrite the old item. When we don't want to do overwrite
+ * object, and the current item to do set operation is an old
+ * item, we could kick out the old item and add a new item. Then
+ * we can ensure we set new object every time.
+ *
+ * @param item, pointer of task item which includes the object
+ * information
+ */
+static void ms_kick_out_item(ms_task_item_t *item)
+{
+ /* allocate a new item */
+ item->key_prefix= ms_get_key_prefix();
+
+ item->key_suffix_offset++;
+ item->value_offset= INVALID_OFFSET; /* new item use invalid value offset */
+ item->client_time= 0;
+} /* ms_kick_out_item */
+
+
+/**
+ * used to judge whether we need overwrite object based on the
+ * options user specified
+ *
+ * @param task, pointer of current task in the concurrency
+ *
+ * @return bool, if need overwrite, return true, else return
+ * false
+ */
+static bool ms_need_overwrite_item(ms_task_t *task)
+{
+ ms_task_item_t *item= task->item;
+
+ assert(item != NULL);
+ assert(task->cmd == CMD_SET);
+
+ /**
+ * according to data overwrite percent to determine if do data
+ * overwrite.
+ */
+ if (task->overwrite_set < (double)task->set_opt
+ * ms_setting.overwrite_percent)
+ {
+ return true;
+ }
+
+ return false;
+} /* ms_need_overwirte_item */
+
+
+/**
+ * used to adjust operation. the function must be called after
+ * select operation. the function change get operation to set
+ * operation, or set operation to get operation based on the
+ * current case.
+ *
+ * @param c, pointer of the concurrency
+ * @param task, pointer of current task in the concurrency
+ *
+ * @return bool, if success, return true, else return false
+ */
+static bool ms_adjust_opt(ms_conn_t *c, ms_task_t *task)
+{
+ ms_task_item_t *item= task->item;
+
+ assert(item != NULL);
+
+ if (task->cmd == CMD_SET)
+ {
+ /* If did set operation too fast, skip some */
+ if (ms_is_set_too_fast(task))
+ {
+ /* get the item instead */
+ if (item->value_offset != INVALID_OFFSET)
+ {
+ task->cmd= CMD_GET;
+ return true;
+ }
+ }
+
+ /* If the current item is not a new item, kick it out */
+ if (item->value_offset != INVALID_OFFSET)
+ {
+ if (ms_need_overwrite_item(task))
+ {
+ /* overwrite */
+ task->overwrite_set++;
+ }
+ else
+ {
+ /* kick out the current item to do set operation */
+ ms_kick_out_item(item);
+ }
+ }
+ else /* it's a new item */
+ {
+ /* need overwrite */
+ if (ms_need_overwrite_item(task))
+ {
+ /**
+ * overwrite not use the item with current set cursor, revert
+ * set cursor.
+ */
+ c->set_cursor--;
+
+ item= ms_get_random_overwrite_item(c);
+ if (item->value_offset != INVALID_OFFSET)
+ {
+ task->item= item;
+ task->overwrite_set++;
+ }
+ else /* item is a new item */
+ {
+ /* select the item to run, and cancel overwrite */
+ task->item= item;
+ }
+ }
+ }
+ task->cmd= CMD_SET;
+ return true;
+ }
+ else
+ {
+ if (item->value_offset == INVALID_OFFSET)
+ {
+ task->cmd= CMD_SET;
+ return true;
+ }
+
+ /**
+ * If It does get operation too fast, it will change the
+ * operation to set.
+ */
+ if (ms_is_get_too_fast(task))
+ {
+ /* don't kick out the first item in the window */
+ if (! ms_is_set_too_fast(task))
+ {
+ ms_kick_out_item(item);
+ task->cmd= CMD_SET;
+ return true;
+ }
+ else
+ {
+ return false;
+ }
+ }
+
+ assert(item->value_offset != INVALID_OFFSET);
+
+ task->cmd= CMD_GET;
+ return true;
+ }
+} /* ms_adjust_opt */
+
+
+/**
+ * used to initialize the task which need verify data.
+ *
+ * @param task, pointer of current task in the concurrency
+ */
+static void ms_task_data_verify_init(ms_task_t *task)
+{
+ ms_task_item_t *item= task->item;
+
+ assert(item != NULL);
+ assert(task->cmd == CMD_GET);
+
+ /**
+ * according to data verification percent to determine if do
+ * data verification.
+ */
+ if (task->verified_get < (double)task->get_opt
+ * ms_setting.verify_percent)
+ {
+ /**
+ * currently it doesn't do verify, just increase the counter,
+ * and do verification next proper get command
+ */
+ if ((task->item->value_offset != INVALID_OFFSET)
+ && (item->exp_time == 0))
+ {
+ task->verify= true;
+ task->finish_verify= false;
+ task->verified_get++;
+ }
+ }
+} /* ms_task_data_verify_init */
+
+
+/**
+ * used to initialize the task which need verify expire time.
+ *
+ * @param task, pointer of current task in the concurrency
+ */
+static void ms_task_expire_verify_init(ms_task_t *task)
+{
+ ms_task_item_t *item= task->item;
+
+ assert(item != NULL);
+ assert(task->cmd == CMD_GET);
+ assert(item->exp_time > 0);
+
+ task->verify= true;
+ task->finish_verify= false;
+} /* ms_task_expire_verify_init */
+
+
+/**
+ * used to get one task, the function initializes the task
+ * structure.
+ *
+ * @param c, pointer of the concurrency
+ * @param warmup, whether it need warmup
+ *
+ * @return ms_task_t*, pointer of current task in the
+ * concurrency
+ */
+static ms_task_t *ms_get_task(ms_conn_t *c, bool warmup)
+{
+ ms_task_t *task= &c->curr_task;
+
+ while (1)
+ {
+ task->verify= false;
+ task->finish_verify= true;
+ task->get_miss= true;
+
+ if (warmup)
+ {
+ task->cmd= CMD_SET;
+ task->item= ms_get_next_set_item(c);
+
+ return task;
+ }
+
+ /* according to operation distribution to choose doing which operation */
+ ms_select_opt(c, task);
+
+ if (! ms_adjust_opt(c, task))
+ {
+ continue;
+ }
+
+ if ((ms_setting.verify_percent > 0) && (task->cmd == CMD_GET))
+ {
+ ms_task_data_verify_init(task);
+ }
+
+ if ((ms_setting.exp_ver_per > 0) && (task->cmd == CMD_GET)
+ && (task->item->exp_time > 0))
+ {
+ ms_task_expire_verify_init(task);
+ }
+
+ break;
+ }
+
+ /**
+ * Only update get and delete counter, set counter will be
+ * updated after set operation successes.
+ */
+ if (task->cmd == CMD_GET)
+ {
+ task->get_opt++;
+ task->cycle_undo_get--;
+ }
+
+ return task;
+} /* ms_get_task */
+
+
+/**
+ * send a signal to the main monitor thread
+ *
+ * @param sync_lock, pointer of the lock
+ */
+static void ms_send_signal(ms_sync_lock_t *sync_lock)
+{
+ pthread_mutex_lock(&sync_lock->lock);
+ sync_lock->count++;
+ pthread_cond_signal(&sync_lock->cond);
+ pthread_mutex_unlock(&sync_lock->lock);
+} /* ms_send_signal */
+
+
+/**
+ * If user only want to do get operation, but there is no object
+ * in server , so we use this function to warmup the server, and
+ * set some objects to server. It runs at the beginning of task.
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_warmup_server(ms_conn_t *c)
+{
+ ms_task_t *task;
+ ms_task_item_t *item;
+
+ /**
+ * Extra one loop to get the last command returned state.
+ * Normally it gets the previous command returned state.
+ */
+ if ((c->remain_warmup_num >= 0)
+ && (c->remain_warmup_num != c->warmup_num))
+ {
+ item= ms_get_cur_opt_item(c);
+ /* only update the set command result state for data verification */
+ if ((c->precmd.cmd == CMD_SET) && (c->precmd.retstat == MCD_STORED))
+ {
+ item->value_offset= item->key_suffix_offset;
+ /* set success, update counter */
+ c->set_cursor++;
+ }
+ else if (c->precmd.cmd == CMD_SET && c->precmd.retstat != MCD_STORED)
+ {
+ printf("key: %" PRIx64 " didn't set success\n", item->key_prefix);
+ }
+ }
+
+ /* the last time don't run a task */
+ if (c->remain_warmup_num-- > 0)
+ {
+ /* operate next task item */
+ task= ms_get_task(c, true);
+ item= task->item;
+ ms_mcd_set(c, item);
+ }
+
+ /**
+ * finish warming up server, wait all connects initialize
+ * complete. Then all connects can start do task at the same
+ * time.
+ */
+ if (c->remain_warmup_num == -1)
+ {
+ ms_send_signal(&ms_global.warmup_lock);
+ c->remain_warmup_num--; /* never run the if branch */
+ }
+} /* ms_warmup_server */
+
+
+/**
+ * dispatch single get and set task
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_single_getset_task_sch(ms_conn_t *c)
+{
+ ms_task_t *task;
+ ms_task_item_t *item;
+
+ /* the last time don't run a task */
+ if (c->remain_exec_num-- > 0)
+ {
+ task= ms_get_task(c, false);
+ item= task->item;
+ if (task->cmd == CMD_SET)
+ {
+ ms_mcd_set(c, item);
+ }
+ else if (task->cmd == CMD_GET)
+ {
+ assert(task->cmd == CMD_GET);
+ ms_mcd_get(c, item);
+ }
+ }
+} /* ms_single_getset_task_sch */
+
+
+/**
+ * dispatch multi-get and set task
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_multi_getset_task_sch(ms_conn_t *c)
+{
+ ms_task_t *task;
+ ms_mlget_task_item_t *mlget_item;
+
+ while (1)
+ {
+ if (c->remain_exec_num-- > 0)
+ {
+ task= ms_get_task(c, false);
+ if (task->cmd == CMD_SET) /* just do it */
+ {
+ ms_mcd_set(c, task->item);
+ break;
+ }
+ else
+ {
+ assert(task->cmd == CMD_GET);
+ mlget_item= &c->mlget_task.mlget_item[c->mlget_task.mlget_num];
+ mlget_item->item= task->item;
+ mlget_item->verify= task->verify;
+ mlget_item->finish_verify= task->finish_verify;
+ mlget_item->get_miss= task->get_miss;
+ c->mlget_task.mlget_num++;
+
+ /* enough multi-get task items can be done */
+ if ((c->mlget_task.mlget_num >= ms_setting.mult_key_num)
+ || ((c->remain_exec_num == 0) && (c->mlget_task.mlget_num > 0)))
+ {
+ ms_mcd_mlget(c);
+ break;
+ }
+ }
+ }
+ else
+ {
+ if ((c->remain_exec_num <= 0) && (c->mlget_task.mlget_num > 0))
+ {
+ ms_mcd_mlget(c);
+ }
+ break;
+ }
+ }
+} /* ms_multi_getset_task_sch */
+
+
+/**
+ * calculate the difference value of two time points
+ *
+ * @param start_time, the start time
+ * @param end_time, the end time
+ *
+ * @return uint64_t, the difference value between start_time and end_time in us
+ */
+int64_t ms_time_diff(struct timeval *start_time, struct timeval *end_time)
+{
+ int64_t endtime= end_time->tv_sec * 1000000 + end_time->tv_usec;
+ int64_t starttime= start_time->tv_sec * 1000000 + start_time->tv_usec;
+
+ assert(endtime >= starttime);
+
+ return endtime - starttime;
+} /* ms_time_diff */
+
+
+/**
+ * after get the response from server for multi-get, the
+ * function update the state of the task and do data verify if
+ * necessary.
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_update_multi_get_result(ms_conn_t *c)
+{
+ ms_mlget_task_item_t *mlget_item;
+ ms_task_item_t *item;
+ char *orignval= NULL;
+ char *orignkey= NULL;
+
+ if (c == NULL)
+ {
+ return;
+ }
+ assert(c != NULL);
+
+ for (int i= 0; i < c->mlget_task.mlget_num; i++)
+ {
+ mlget_item= &c->mlget_task.mlget_item[i];
+ item= mlget_item->item;
+ orignval= &ms_setting.char_block[item->value_offset];
+ orignkey= &ms_setting.char_block[item->key_suffix_offset];
+
+ /* update get miss counter */
+ if (mlget_item->get_miss)
+ {
+ atomic_add_size(&ms_stats.get_misses, 1);
+ }
+
+ /* get nothing from server for this task item */
+ if (mlget_item->verify && ! mlget_item->finish_verify)
+ {
+ /* verify expire time if necessary */
+ if (item->exp_time > 0)
+ {
+ struct timeval curr_time;
+ gettimeofday(&curr_time, NULL);
+
+ /* object doesn't expire but can't get it now */
+ if (curr_time.tv_sec - item->client_time
+ < item->exp_time - EXPIRE_TIME_ERROR)
+ {
+ atomic_add_size(&ms_stats.unexp_unget, 1);
+
+ if (ms_setting.verbose)
+ {
+ char set_time[64];
+ char cur_time[64];
+ strftime(set_time, 64, "%Y-%m-%d %H:%M:%S",
+ localtime(&item->client_time));
+ strftime(cur_time, 64, "%Y-%m-%d %H:%M:%S",
+ localtime(&curr_time.tv_sec));
+ fprintf(stderr,
+ "\n\t<%d expire time verification failed, object "
+ "doesn't expire but can't get it now\n"
+ "\tkey len: %d\n"
+ "\tkey: %" PRIx64 " %.*s\n"
+ "\tset time: %s current time: %s "
+ "diff time: %d expire time: %d\n"
+ "\texpected data len: %d\n"
+ "\texpected data: %.*s\n"
+ "\treceived data: \n",
+ c->sfd,
+ item->key_size,
+ item->key_prefix,
+ item->key_size - (int)KEY_PREFIX_SIZE,
+ orignkey,
+ set_time,
+ cur_time,
+ (int)(curr_time.tv_sec - item->client_time),
+ item->exp_time,
+ item->value_size,
+ item->value_size,
+ orignval);
+ fflush(stderr);
+ }
+ }
+ }
+ else
+ {
+ atomic_add_size(&ms_stats.vef_miss, 1);
+
+ if (ms_setting.verbose)
+ {
+ fprintf(stderr, "\n<%d data verification failed\n"
+ "\tkey len: %d\n"
+ "\tkey: %" PRIx64 " %.*s\n"
+ "\texpected data len: %d\n"
+ "\texpected data: %.*s\n"
+ "\treceived data: \n",
+ c->sfd, item->key_size, item->key_prefix,
+ item->key_size - (int)KEY_PREFIX_SIZE,
+ orignkey, item->value_size, item->value_size, orignval);
+ fflush(stderr);
+ }
+ }
+ }
+ }
+ c->mlget_task.mlget_num= 0;
+ c->mlget_task.value_index= INVALID_OFFSET;
+} /* ms_update_multi_get_result */
+
+
+/**
+ * after get the response from server for single get, the
+ * function update the state of the task and do data verify if
+ * necessary.
+ *
+ * @param c, pointer of the concurrency
+ * @param item, pointer of task item which includes the object
+ * information
+ */
+static void ms_update_single_get_result(ms_conn_t *c, ms_task_item_t *item)
+{
+ char *orignval= NULL;
+ char *orignkey= NULL;
+
+ if ((c == NULL) || (item == NULL))
+ {
+ return;
+ }
+ assert(c != NULL);
+ assert(item != NULL);
+
+ orignval= &ms_setting.char_block[item->value_offset];
+ orignkey= &ms_setting.char_block[item->key_suffix_offset];
+
+ /* update get miss counter */
+ if ((c->precmd.cmd == CMD_GET) && c->curr_task.get_miss)
+ {
+ atomic_add_size(&ms_stats.get_misses, 1);
+ }
+
+ /* get nothing from server for this task item */
+ if ((c->precmd.cmd == CMD_GET) && c->curr_task.verify
+ && ! c->curr_task.finish_verify)
+ {
+ /* verify expire time if necessary */
+ if (item->exp_time > 0)
+ {
+ struct timeval curr_time;
+ gettimeofday(&curr_time, NULL);
+
+ /* object doesn't expire but can't get it now */
+ if (curr_time.tv_sec - item->client_time
+ < item->exp_time - EXPIRE_TIME_ERROR)
+ {
+ atomic_add_size(&ms_stats.unexp_unget, 1);
+
+ if (ms_setting.verbose)
+ {
+ char set_time[64];
+ char cur_time[64];
+ strftime(set_time, 64, "%Y-%m-%d %H:%M:%S",
+ localtime(&item->client_time));
+ strftime(cur_time, 64, "%Y-%m-%d %H:%M:%S",
+ localtime(&curr_time.tv_sec));
+ fprintf(stderr,
+ "\n\t<%d expire time verification failed, object "
+ "doesn't expire but can't get it now\n"
+ "\tkey len: %d\n"
+ "\tkey: %" PRIx64 " %.*s\n"
+ "\tset time: %s current time: %s "
+ "diff time: %d expire time: %d\n"
+ "\texpected data len: %d\n"
+ "\texpected data: %.*s\n"
+ "\treceived data: \n",
+ c->sfd,
+ item->key_size,
+ item->key_prefix,
+ item->key_size - (int)KEY_PREFIX_SIZE,
+ orignkey,
+ set_time,
+ cur_time,
+ (int)(curr_time.tv_sec - item->client_time),
+ item->exp_time,
+ item->value_size,
+ item->value_size,
+ orignval);
+ fflush(stderr);
+ }
+ }
+ }
+ else
+ {
+ atomic_add_size(&ms_stats.vef_miss, 1);
+
+ if (ms_setting.verbose)
+ {
+ fprintf(stderr, "\n<%d data verification failed\n"
+ "\tkey len: %d\n"
+ "\tkey: %" PRIx64 " %.*s\n"
+ "\texpected data len: %d\n"
+ "\texpected data: %.*s\n"
+ "\treceived data: \n",
+ c->sfd, item->key_size, item->key_prefix,
+ item->key_size - (int)KEY_PREFIX_SIZE,
+ orignkey, item->value_size, item->value_size, orignval);
+ fflush(stderr);
+ }
+ }
+ }
+} /* ms_update_single_get_result */
+
+
+/**
+ * after get the response from server for set the function
+ * update the state of the task and do data verify if necessary.
+ *
+ * @param c, pointer of the concurrency
+ * @param item, pointer of task item which includes the object
+ * information
+ */
+static void ms_update_set_result(ms_conn_t *c, ms_task_item_t *item)
+{
+ if ((c == NULL) || (item == NULL))
+ {
+ return;
+ }
+ assert(c != NULL);
+ assert(item != NULL);
+
+ if (c->precmd.cmd == CMD_SET)
+ {
+ switch (c->precmd.retstat)
+ {
+ case MCD_STORED:
+ if (item->value_offset == INVALID_OFFSET)
+ {
+ /* first set with the same offset of key suffix */
+ item->value_offset= item->key_suffix_offset;
+ }
+ else
+ {
+ /* not first set, just increase the value offset */
+ item->value_offset+= 1;
+ }
+
+ /* set successes, update counter */
+ c->set_cursor++;
+ c->curr_task.set_opt++;
+ c->curr_task.cycle_undo_set--;
+ break;
+
+ case MCD_SERVER_ERROR:
+ default:
+ break;
+ } /* switch */
+ }
+} /* ms_update_set_result */
+
+
+/**
+ * update the response time result
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_update_stat_result(ms_conn_t *c)
+{
+ bool get_miss= false;
+
+ if (c == NULL)
+ {
+ return;
+ }
+ assert(c != NULL);
+
+ gettimeofday(&c->end_time, NULL);
+ uint64_t time_diff= (uint64_t)ms_time_diff(&c->start_time, &c->end_time);
+
+ pthread_mutex_lock(&ms_statistic.stat_mutex);
+
+ switch (c->precmd.cmd)
+ {
+ case CMD_SET:
+ ms_record_event(&ms_statistic.set_stat, time_diff, false);
+ break;
+
+ case CMD_GET:
+ if (c->curr_task.get_miss)
+ {
+ get_miss= true;
+ }
+ ms_record_event(&ms_statistic.get_stat, time_diff, get_miss);
+ break;
+
+ default:
+ break;
+ } /* switch */
+
+ ms_record_event(&ms_statistic.total_stat, time_diff, get_miss);
+ pthread_mutex_unlock(&ms_statistic.stat_mutex);
+} /* ms_update_stat_result */
+
+
+/**
+ * after get response from server for the current operation, and
+ * before doing the next operation, update the state of the
+ * current operation.
+ *
+ * @param c, pointer of the concurrency
+ */
+static void ms_update_task_result(ms_conn_t *c)
+{
+ ms_task_item_t *item;
+
+ if (c == NULL)
+ {
+ return;
+ }
+ assert(c != NULL);
+
+ item= ms_get_cur_opt_item(c);
+ if (item == NULL)
+ {
+ return;
+ }
+ assert(item != NULL);
+
+ ms_update_set_result(c, item);
+
+ if ((ms_setting.stat_freq > 0)
+ && ((c->precmd.cmd == CMD_SET) || (c->precmd.cmd == CMD_GET)))
+ {
+ ms_update_stat_result(c);
+ }
+
+ /* update multi-get task item */
+ if (((ms_setting.mult_key_num > 1)
+ && (c->mlget_task.mlget_num >= ms_setting.mult_key_num))
+ || ((c->remain_exec_num == 0) && (c->mlget_task.mlget_num > 0)))
+ {
+ ms_update_multi_get_result(c);
+ }
+ else
+ {
+ ms_update_single_get_result(c, item);
+ }
+} /* ms_update_task_result */
+
+
+/**
+ * run get and set operation
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_run_getset_task(ms_conn_t *c)
+{
+ /**
+ * extra one loop to get the last command return state. get the
+ * last command return state.
+ */
+ if ((c->remain_exec_num >= 0)
+ && (c->remain_exec_num != c->exec_num))
+ {
+ ms_update_task_result(c);
+ }
+
+ /* multi-get */
+ if (ms_setting.mult_key_num > 1)
+ {
+ /* operate next task item */
+ ms_multi_getset_task_sch(c);
+ }
+ else
+ {
+ /* operate next task item */
+ ms_single_getset_task_sch(c);
+ }
+
+ /* no task to do, exit */
+ if ((c->remain_exec_num == -1) || ms_global.time_out)
+ {
+ return -1;
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_run_getset_task */
+
+
+/**
+ * the state machine call the function to execute task.
+ *
+ * @param c, pointer of the concurrency
+ *
+ * @return int, if success, return EXIT_SUCCESS, else return -1
+ */
+int ms_exec_task(struct conn *c)
+{
+ if (! ms_global.finish_warmup)
+ {
+ ms_warmup_server(c);
+ }
+ else
+ {
+ if (ms_run_getset_task(c) != 0)
+ {
+ return -1;
+ }
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_exec_task */
--- /dev/null
+/*
+ * File: ms_task.h
+ * Author: Mingqiang Zhuang
+ *
+ * Created on February 10, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ */
+#ifndef MS_TASK_H
+#define MS_TASK_H
+
+#include <sys/types.h>
+#include <stdint.h>
+#if !defined(__cplusplus)
+# include <stdbool.h>
+#endif
+#include <time.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define UNIT_ITEMS_COUNT 1024 /* each window unit has 1024 items */
+#define KEY_PREFIX_SIZE (sizeof(uint64_t)) /* key prefix length: 8 bytes */
+#define INVALID_OFFSET (-1) /* invalid offset in the character table */
+#define FIXED_EXPIRE_TIME 60 /* default expire time is 60s */
+#define EXPIRE_TIME_ERROR 5 /* default expire time error is 5s */
+
+/* information of a task item(object) */
+typedef struct task_item
+{
+ uint64_t key_prefix; /* prefix of the key, 8 bytes, binary */
+ int key_size; /* key size */
+ int key_suffix_offset; /* suffix offset in the global character table */
+
+ int value_size; /* data size */
+ int value_offset; /* data offset in the global character table */
+
+ time_t client_time; /* the current client time */
+ int exp_time; /* expire time */
+} ms_task_item_t;
+
+/* task item for multi-get */
+typedef struct mlget_task_item
+{
+ ms_task_item_t *item; /* task item */
+ bool verify; /* whether verify data or not */
+ bool finish_verify; /* whether finish data verify or not */
+ bool get_miss; /* whether get miss or not */
+} ms_mlget_task_item_t;
+
+/* information of multi-get task */
+typedef struct mlget_task
+{
+ ms_mlget_task_item_t *mlget_item; /* multi-get task array */
+ int mlget_num; /* how many tasks in mlget_task array */
+ int value_index; /* the nth value received by the connect, for multi-get */
+} ms_mlget_task_t;
+
+/* structure used to store the state of the running task */
+typedef struct task
+{
+ int cmd; /* command name */
+ bool verify; /* whether verify data or not */
+ bool finish_verify; /* whether finish data verify or not */
+ bool get_miss; /* whether get miss or not */
+ ms_task_item_t *item; /* task item */
+
+ /* counter for command distribution adjustment */
+ uint64_t get_opt; /* number of total get operations */
+ uint64_t set_opt; /* number of total set operations, no including warmup set count */
+ int cycle_undo_get; /* number of undo get in an adjustment cycle */
+ int cycle_undo_set; /* number of undo set in an adjustment cycle */
+ uint64_t verified_get; /* number of total verified get operations */
+ uint64_t overwrite_set; /* number of total overwrite set operations */
+} ms_task_t;
+
+struct conn;
+
+/* the state machine call the function to execute task.*/
+int ms_exec_task(struct conn *c);
+
+
+/* calculate the difference value of two time points */
+int64_t ms_time_diff(struct timeval *start_time, struct timeval *end_time);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* end of MS_TASK_H */
--- /dev/null
+/*
+ * File: ms_thread.c
+ * Author: Mingqiang Zhuang
+ *
+ * Created on February 10, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ */
+
+#include "mem_config.h"
+
+#if defined(HAVE_SYS_TIME_H)
+# include <sys/time.h>
+#endif
+
+#if defined(HAVE_TIME_H)
+# include <time.h>
+#endif
+
+#include "ms_thread.h"
+#include "ms_setting.h"
+#include "ms_atomic.h"
+
+/* global variable */
+pthread_key_t ms_thread_key;
+
+/* array of thread context structure, each thread has a thread context structure */
+static ms_thread_ctx_t *ms_thread_ctx;
+
+/* functions */
+static void ms_set_current_time(void);
+static void ms_check_sock_timeout(void);
+static void ms_clock_handler(const int fd, const short which, void *arg);
+static uint32_t ms_set_thread_cpu_affinity(uint32_t cpu);
+static int ms_setup_thread(ms_thread_ctx_t *thread_ctx);
+static void *ms_worker_libevent(void *arg);
+static void ms_create_worker(void *(*func)(void *), void *arg);
+
+
+/**
+ * time-sensitive callers can call it by hand with this,
+ * outside the normal ever-1-second timer
+ */
+static void ms_set_current_time()
+{
+ struct timeval timer;
+ ms_thread_t *ms_thread= pthread_getspecific(ms_thread_key);
+
+ gettimeofday(&timer, NULL);
+ ms_thread->curr_time= (rel_time_t)timer.tv_sec;
+} /* ms_set_current_time */
+
+
+/**
+ * used to check whether UDP of command are waiting timeout
+ * by the ever-1-second timer
+ */
+static void ms_check_sock_timeout(void)
+{
+ ms_thread_t *ms_thread= pthread_getspecific(ms_thread_key);
+ ms_conn_t *c= NULL;
+ int time_diff= 0;
+
+ for (uint32_t i= 0; i < ms_thread->thread_ctx->nconns; i++)
+ {
+ c= &ms_thread->conn[i];
+
+ if (c->udp)
+ {
+ time_diff= (int)(ms_thread->curr_time - (rel_time_t)c->start_time.tv_sec);
+
+ /* wait time out */
+ if (time_diff > SOCK_WAIT_TIMEOUT)
+ {
+ /* calculate dropped packets count */
+ if (c->recvpkt > 0)
+ {
+ atomic_add_size(&ms_stats.pkt_drop, c->packets - c->recvpkt);
+ }
+
+ atomic_add_size(&ms_stats.udp_timeout, 1);
+ ms_reset_conn(c, true);
+ }
+ }
+ }
+} /* ms_check_sock_timeout */
+
+
+/* if disconnect, the ever-1-second timer will call this function to reconnect */
+static void ms_reconn_thread_socks(void)
+{
+ ms_thread_t *ms_thread= pthread_getspecific(ms_thread_key);
+ for (uint32_t i= 0; i < ms_thread->thread_ctx->nconns; i++)
+ {
+ ms_reconn_socks(&ms_thread->conn[i]);
+ }
+} /* ms_reconn_thread_socks */
+
+
+/**
+ * the handler of the ever-1-second timer
+ *
+ * @param fd, the descriptors of the socket
+ * @param which, event flags
+ * @param arg, argument
+ */
+static void ms_clock_handler(const int fd, const short which, void *arg)
+{
+ ms_thread_t *ms_thread= pthread_getspecific(ms_thread_key);
+ struct timeval t=
+ {
+ .tv_sec= 1, .tv_usec= 0
+ };
+
+ UNUSED_ARGUMENT(fd);
+ UNUSED_ARGUMENT(which);
+ UNUSED_ARGUMENT(arg);
+
+ ms_set_current_time();
+
+ if (ms_thread->initialized)
+ {
+ /* only delete the event if it's actually there. */
+ evtimer_del(&ms_thread->clock_event);
+ ms_check_sock_timeout();
+ }
+ else
+ {
+ ms_thread->initialized= true;
+ }
+
+ ms_reconn_thread_socks();
+
+ evtimer_set(&ms_thread->clock_event, ms_clock_handler, 0);
+ event_base_set(ms_thread->base, &ms_thread->clock_event);
+ evtimer_add(&ms_thread->clock_event, &t);
+} /* ms_clock_handler */
+
+
+/**
+ * used to bind thread to CPU if the system supports
+ *
+ * @param cpu, cpu index
+ *
+ * @return if success, return EXIT_SUCCESS, else return -1
+ */
+static uint32_t ms_set_thread_cpu_affinity(uint32_t cpu)
+{
+ uint32_t ret= 0;
+
+#ifdef HAVE_CPU_SET_T
+ cpu_set_t cpu_set;
+ CPU_ZERO(&cpu_set);
+ CPU_SET(cpu, &cpu_set);
+
+ if (sched_setaffinity(0, sizeof(cpu_set_t), &cpu_set) == -1)
+ {
+ fprintf(stderr, "WARNING: Could not set CPU Affinity, continuing...\n");
+ ret= 1;
+ }
+#else
+ UNUSED_ARGUMENT(cpu);
+#endif
+
+ return ret;
+} /* ms_set_thread_cpu_affinity */
+
+
+/**
+ * Set up a thread's information.
+ *
+ * @param thread_ctx, pointer of the thread context structure
+ *
+ * @return if success, return EXIT_SUCCESS, else return -1
+ */
+static int ms_setup_thread(ms_thread_ctx_t *thread_ctx)
+{
+
+ ms_thread_t *ms_thread= (ms_thread_t *)calloc(sizeof(*ms_thread), 1);
+ pthread_setspecific(ms_thread_key, (void *)ms_thread);
+
+ ms_thread->thread_ctx= thread_ctx;
+ ms_thread->nactive_conn= thread_ctx->nconns;
+ ms_thread->initialized= false;
+ static ATOMIC uint32_t cnt= 0;
+
+ gettimeofday(&ms_thread->startup_time, NULL);
+
+ ms_thread->base= event_init();
+ if (ms_thread->base == NULL)
+ {
+ if (atomic_add_32_nv(&cnt, 1) == 0)
+ {
+ fprintf(stderr, "Can't allocate event base.\n");
+ }
+
+ return -1;
+ }
+
+ ms_thread->conn=
+ (ms_conn_t *)malloc((size_t)thread_ctx->nconns * sizeof(ms_conn_t));
+ if (ms_thread->conn == NULL)
+ {
+ if (atomic_add_32_nv(&cnt, 1) == 0)
+ {
+ fprintf(
+ stderr,
+ "Can't allocate concurrency structure for thread descriptors.");
+ }
+
+ return -1;
+ }
+ memset(ms_thread->conn, 0, (size_t)thread_ctx->nconns * sizeof(ms_conn_t));
+
+ for (uint32_t i= 0; i < thread_ctx->nconns; i++)
+ {
+ ms_thread->conn[i].conn_idx= i;
+ if (ms_setup_conn(&ms_thread->conn[i]) != 0)
+ {
+ /* only output this error once */
+ if (atomic_add_32_nv(&cnt, 1) == 0)
+ {
+ fprintf(stderr, "Initializing connection failed.\n");
+ }
+
+ return -1;
+ }
+ }
+
+ return EXIT_SUCCESS;
+} /* ms_setup_thread */
+
+
+/**
+ * Worker thread: main event loop
+ *
+ * @param arg, the pointer of argument
+ *
+ * @return void*
+ */
+static void *ms_worker_libevent(void *arg)
+{
+ ms_thread_t *ms_thread= NULL;
+ ms_thread_ctx_t *thread_ctx= (ms_thread_ctx_t *)arg;
+
+ /**
+ * If system has more than one cpu and supports set cpu
+ * affinity, try to bind each thread to a cpu core;
+ */
+ if (ms_setting.ncpu > 1)
+ {
+ ms_set_thread_cpu_affinity(thread_ctx->thd_idx % ms_setting.ncpu);
+ }
+
+ if (ms_setup_thread(thread_ctx) != 0)
+ {
+ exit(1);
+ }
+
+ /* each thread with a timer */
+ ms_clock_handler(0, 0, 0);
+
+ pthread_mutex_lock(&ms_global.init_lock.lock);
+ ms_global.init_lock.count++;
+ pthread_cond_signal(&ms_global.init_lock.cond);
+ pthread_mutex_unlock(&ms_global.init_lock.lock);
+
+ ms_thread= pthread_getspecific(ms_thread_key);
+ event_base_loop(ms_thread->base, 0);
+
+ return NULL;
+} /* ms_worker_libevent */
+
+
+/**
+ * Creates a worker thread.
+ *
+ * @param func, the callback function
+ * @param arg, the argument to pass to the callback function
+ */
+static void ms_create_worker(void *(*func)(void *), void *arg)
+{
+ pthread_t thread;
+ pthread_attr_t attr;
+ int ret;
+
+ pthread_attr_init(&attr);
+
+ if ((ret= pthread_create(&thread, &attr, func, arg)) != 0)
+ {
+ fprintf(stderr, "Can't create thread: %s.\n", strerror(ret));
+ exit(1);
+ }
+} /* ms_create_worker */
+
+
+/* initialize threads */
+void ms_thread_init()
+{
+ ms_thread_ctx=
+ (ms_thread_ctx_t *)malloc(
+ sizeof(ms_thread_ctx_t) * (size_t)ms_setting.nthreads);
+ if (ms_thread_ctx == NULL)
+ {
+ fprintf(stderr, "Can't allocate thread descriptors.");
+ exit(1);
+ }
+
+ for (uint32_t i= 0; i < ms_setting.nthreads; i++)
+ {
+ ms_thread_ctx[i].thd_idx= i;
+ ms_thread_ctx[i].nconns= ms_setting.nconns / ms_setting.nthreads;
+
+ /**
+ * If only one server, all the connections in all threads
+ * connects the same server. For support multi-servers, simple
+ * distribute thread to server.
+ */
+ ms_thread_ctx[i].srv_idx= i % ms_setting.srv_cnt;
+ ms_thread_ctx[i].tps_perconn= ms_setting.expected_tps
+ / (int)ms_setting.nconns;
+ ms_thread_ctx[i].exec_num_perconn= ms_setting.exec_num
+ / ms_setting.nconns;
+ }
+
+ if (pthread_key_create(&ms_thread_key, NULL))
+ {
+ fprintf(stderr, "Can't create pthread keys. Major malfunction!\n");
+ exit(1);
+ }
+ /* Create threads after we've done all the epoll setup. */
+ for (uint32_t i= 0; i < ms_setting.nthreads; i++)
+ {
+ ms_create_worker(ms_worker_libevent, (void *)&ms_thread_ctx[i]);
+ }
+} /* ms_thread_init */
+
+
+/* cleanup some resource of threads when all the threads exit */
+void ms_thread_cleanup()
+{
+ if (ms_thread_ctx != NULL)
+ {
+ free(ms_thread_ctx);
+ }
+ pthread_key_delete(ms_thread_key);
+} /* ms_thread_cleanup */
--- /dev/null
+/*
+ * File: ms_thread.h
+ * Author: Mingqiang Zhuang
+ *
+ * Created on February 10, 2009
+ *
+ * (c) Copyright 2009, Schooner Information Technology, Inc.
+ * http://www.schoonerinfotech.com/
+ *
+ */
+
+/**
+ * Asynchronous memslap has the similar implementation of
+ * multi-threads with memcached. Asynchronous memslap creates
+ * one or more self-governed threads; each thread is bound with
+ * one CPU core if the system supports setting CPU core
+ * affinity. And every thread has private variables. There is
+ * less communication or some shared resources among all the
+ * threads. It can improve the performance because there are
+ * fewer locks and competition. In addition, each thread has a
+ * libevent to manage the events of network. Each thread has one
+ * or more self-governed concurrencies; each concurrency has one
+ * or more socket connections. All the concurrencies don't
+ * communicate with each other even though they are in the same
+ * thread.
+ */
+#ifndef MS_THREAD_H
+#define MS_THREAD_H
+
+#include <sched.h>
+#include "ms_conn.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Time relative to server start. Smaller than time_t on 64-bit systems. */
+typedef unsigned int rel_time_t;
+
+/* Used to store the context of each thread */
+typedef struct thread_ctx
+{
+ uint32_t thd_idx; /* the thread index */
+ uint32_t nconns; /* how many connections included by the thread */
+ uint32_t srv_idx; /* index of the thread */
+ int tps_perconn; /* expected throughput per connection */
+ int64_t exec_num_perconn; /* execute number per connection */
+} ms_thread_ctx_t;
+
+/* Used to store the private variables of each thread */
+typedef struct thread
+{
+ ms_conn_t *conn; /* conn array to store all the conn in the thread */
+ uint32_t nactive_conn; /* how many connects are active */
+
+ ms_thread_ctx_t *thread_ctx; /* thread context from the caller */
+ struct event_base *base; /* libevent handler created by this thread */
+
+ rel_time_t curr_time; /* current time */
+ struct event clock_event; /* clock event to time each one second */
+ bool initialized; /* whether clock_event has been initialized */
+
+ struct timeval startup_time; /* start time of the thread */
+} ms_thread_t;
+
+/* initialize threads */
+void ms_thread_init(void);
+
+
+/* cleanup some resource of threads when all the threads exit */
+void ms_thread_cleanup(void);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* end of MS_THREAD_H */
projects / m6w6 / libmemcached / commitdiff
