-
Notifications
You must be signed in to change notification settings - Fork 0
/
util.c
40 lines (36 loc) · 1.01 KB
/
util.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
#include <stdio.h>
#include <stdlib.h>
#include "util.h"
static void simple_stat_reset(struct simple_stat *stat)
{
gettimeofday(&stat->start, NULL);
gettimeofday(&stat->stop, NULL);
stat->count = 0;
stat->total = 0.0;
stat->real_rate = 0.0;
stat->avg_rate = 0.0;
}
static void simple_stat_add(struct simple_stat *stat, double v)
{
struct timeval current;
gettimeofday(¤t, NULL);
double real_epoch = (current.tv_sec - stat->stop.tv_sec) + (current.tv_usec - stat->stop.tv_usec) / 1e6;
double total_epoch = (current.tv_sec - stat->start.tv_sec) + (current.tv_usec - stat->start.tv_usec) / 1e6;
stat->count++;
stat->real_rate = (v - stat->total) / real_epoch;
stat->avg_rate = v / total_epoch;
stat->total = v;
stat->stop = current;
}
struct simple_stat *new_simple_stat()
{
struct simple_stat *stat = malloc(sizeof(*stat));
if (stat == NULL) {
fprintf(stderr, "malloc simple_stat failed\n");
return NULL;
}
stat->reset = simple_stat_reset;
stat->add = simple_stat_add;
stat->reset(stat);
return stat;
}