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/*
* Copyright 2016, Anton Blanchard, Michael Ellerman, IBM Corp.
* Licensed under GPLv2.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <time.h>
#include "utils.h"
#define ITERATIONS 5000000
#define MEMSIZE (128 * 1024 * 1024)
int test_mmap(void)
{
struct timespec ts_start, ts_end;
unsigned long i = ITERATIONS;
clock_gettime(CLOCK_MONOTONIC, &ts_start);
while (i--) {
char *c = mmap(NULL, MEMSIZE, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
FAIL_IF(c == MAP_FAILED);
munmap(c, MEMSIZE);
}
clock_gettime(CLOCK_MONOTONIC, &ts_end);
printf("time = %.6f\n", ts_end.tv_sec - ts_start.tv_sec + (ts_end.tv_nsec - ts_start.tv_nsec) / 1e9);
return 0;
}
int main(void)
{
return test_harness(test_mmap, "mmap_bench");
}
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