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