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
11int 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}