--- /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"
+
+#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) {
+ 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]) {
+ 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]) || (stat->dist[i + 1]) || (stat->dist[i + 2])
+ || (stat->dist[i + 3]))
+ {
+ 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 */
projects / awesomized / libmemcached / blobdiff