1 /**********************************************************************
2 * Copyright (c) 2014 Pieter Wuille *
3 * Distributed under the MIT software license, see the accompanying *
4 * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
5 **********************************************************************/
6
7 #ifndef _SECP256K1_BENCH_H_
8 #define _SECP256K1_BENCH_H_
9
10 #include <stdio.h>
11 #include <math.h>
12 #include "sys/time.h"
13
gettimedouble(void)14 static double gettimedouble(void) {
15 struct timeval tv;
16 gettimeofday(&tv, NULL);
17 return tv.tv_usec * 0.000001 + tv.tv_sec;
18 }
19
print_number(double x)20 void print_number(double x) {
21 double y = x;
22 int c = 0;
23 if (y < 0.0) {
24 y = -y;
25 }
26 while (y < 100.0) {
27 y *= 10.0;
28 c++;
29 }
30 printf("%.*f", c, x);
31 }
32
run_benchmark(char * name,void (* benchmark)(void *),void (* setup)(void *),void (* teardown)(void *),void * data,int count,int iter)33 void run_benchmark(char *name, void (*benchmark)(void*), void (*setup)(void*), void (*teardown)(void*), void* data, int count, int iter) {
34 int i;
35 double min = HUGE_VAL;
36 double sum = 0.0;
37 double max = 0.0;
38 for (i = 0; i < count; i++) {
39 double begin, total;
40 if (setup != NULL) {
41 setup(data);
42 }
43 begin = gettimedouble();
44 benchmark(data);
45 total = gettimedouble() - begin;
46 if (teardown != NULL) {
47 teardown(data);
48 }
49 if (total < min) {
50 min = total;
51 }
52 if (total > max) {
53 max = total;
54 }
55 sum += total;
56 }
57 printf("%s: min ", name);
58 print_number(min * 1000000.0 / iter);
59 printf("us / avg ");
60 print_number((sum / count) * 1000000.0 / iter);
61 printf("us / max ");
62 print_number(max * 1000000.0 / iter);
63 printf("us\n");
64 }
65
66 #endif
67