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