| /* | |
| * 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"); | |
| } |