--- /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 */
projects / awesomized / libmemcached / blobdiff