+++ /dev/null
-/*
- +--------------------------------------------------------------------+
- | libmemcached - C/C++ Client Library for memcached |
- +--------------------------------------------------------------------+
- | Redistribution and use in source and binary forms, with or without |
- | modification, are permitted under the terms of the BSD license. |
- | You should have received a copy of the license in a bundled file |
- | named LICENSE; in case you did not receive a copy you can review |
- | the terms online at: https://opensource.org/licenses/BSD-3-Clause |
- +--------------------------------------------------------------------+
- | Copyright (c) 2006-2014 Brian Aker https://datadifferential.com/ |
- | Copyright (c) 2020 Michael Wallner <mike@php.net> |
- +--------------------------------------------------------------------+
-*/
-
-#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);
- 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);
-
- 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);
- 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);
- 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);
-
- 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);
- assert(item);
-
- 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);
- assert(item);
-
- 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);
-
- 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);
-
- item = ms_get_cur_opt_item(c);
- if (item == NULL) {
- return;
- }
- assert(item);
-
- 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)) {
- return -1;
- }
- }
-
- return EXIT_SUCCESS;
-} /* ms_exec_task */
projects / awesomized / libmemcached / blobdiff