access_memory_even.c

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