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// SPDX-License-Identifier: GPL-2.0
/*
* Artificial memory access program for testing DAMON.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
enum access_mode {
ACCESS_MODE_ONCE,
ACCESS_MODE_REPEAT,
};
int main(int argc, char *argv[])
{
char **regions;
clock_t start_clock;
int nr_regions;
int sz_region;
int access_time_ms;
enum access_mode mode = ACCESS_MODE_ONCE;
int i;
if (argc < 4) {
printf("Usage: %s <number> <size (bytes)> <time (ms)> [mode]\n",
argv[0]);
return -1;
}
nr_regions = atoi(argv[1]);
sz_region = atoi(argv[2]);
access_time_ms = atoi(argv[3]);
if (argc > 4 && !strcmp(argv[4], "repeat"))
mode = ACCESS_MODE_REPEAT;
regions = malloc(sizeof(*regions) * nr_regions);
for (i = 0; i < nr_regions; i++)
regions[i] = malloc(sz_region);
do {
for (i = 0; i < nr_regions; i++) {
start_clock = clock();
while ((clock() - start_clock) * 1000 / CLOCKS_PER_SEC
< access_time_ms)
memset(regions[i], i, sz_region);
}
} while (mode == ACCESS_MODE_REPEAT);
return 0;
}
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