1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Artificial memory access program for testing DAMON. 4 */ 5 6 #include <stdio.h> 7 #include <stdlib.h> 8 #include <string.h> 9 #include <time.h> 10 11 int main(int argc, char *argv[]) 12 { 13 char **regions; 14 clock_t start_clock; 15 int nr_regions; 16 int sz_region; 17 int access_time_ms; 18 int i; 19 20 if (argc != 4) { 21 printf("Usage: %s <number> <size (bytes)> <time (ms)>\n", 22 argv[0]); 23 return -1; 24 } 25 26 nr_regions = atoi(argv[1]); 27 sz_region = atoi(argv[2]); 28 access_time_ms = atoi(argv[3]); 29 30 regions = malloc(sizeof(*regions) * nr_regions); 31 for (i = 0; i < nr_regions; i++) 32 regions[i] = malloc(sz_region); 33 34 for (i = 0; i < nr_regions; i++) { 35 start_clock = clock(); 36 while ((clock() - start_clock) * 1000 / CLOCKS_PER_SEC < 37 access_time_ms) 38 memset(regions[i], i, sz_region); 39 } 40 return 0; 41 } 42