diff options
Diffstat (limited to 'tools/testing/selftests/damon/access_memory.c')
-rw-r--r-- | tools/testing/selftests/damon/access_memory.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/tools/testing/selftests/damon/access_memory.c b/tools/testing/selftests/damon/access_memory.c new file mode 100644 index 000000000000..585a2fa54329 --- /dev/null +++ b/tools/testing/selftests/damon/access_memory.c @@ -0,0 +1,41 @@ +// 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> + +int main(int argc, char *argv[]) +{ + char **regions; + clock_t start_clock; + int nr_regions; + int sz_region; + int access_time_ms; + int i; + + if (argc != 4) { + printf("Usage: %s <number> <size (bytes)> <time (ms)>\n", + argv[0]); + return -1; + } + + nr_regions = atoi(argv[1]); + sz_region = atoi(argv[2]); + access_time_ms = atoi(argv[3]); + + regions = malloc(sizeof(*regions) * nr_regions); + for (i = 0; i < nr_regions; i++) + regions[i] = malloc(sz_region); + + 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, 1024 * 1024 * 10); + } + return 0; +} |