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/* -*- c-file-style: "GNU" -*- */
/*
* Copyright (C) CNRS, INRIA, Université Bordeaux 1, Télécom SudParis
* See COPYING in top-level directory.
*/
#include <sys/time.h>
#include <stdio.h>
#define NB_ITER 1000000000
#define TIME_DIFF(t1, t2) ((t2.tv_sec-t1.tv_sec)*1e6+(t2.tv_usec-t1.tv_usec))
int foo_local() {
return 42;
}
int main() {
int i, j;
unsigned res = 0;
struct timeval t1, t2;
for (j = 100; j < NB_ITER; j *= 10) {
fprintf(stderr, "START %d iter!\n", j);
if (gettimeofday(&t1, NULL)) {
perror("gettimeofday");
}
for (i = 0; i < j; i++) {
res += foo();
res += foo_local();
}
/* fin de la mesure */
if (gettimeofday(&t2, NULL)) {
perror("gettimeofday");
}
fprintf(stderr, "STOP !\n");
/* affichage du resultat */
fprintf(stderr, "res = %d\n", res);
printf("%d\t%lf\n", j, TIME_DIFF(t1, t2) / j);
}
return 0;
}
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