tools/testing/selftests/damon/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 #include <time.h>
  13
  14 int main(int argc, char *argv[])
  15 {
  16         char **regions;
  17         int nr_regions;
  18         int sz_region;
  19         int i;
  20
  21         if (argc != 3) {
  22                 printf("Usage: %s <number> <size (bytes)>\n", argv[0]);
  23                 return -1;
  24         }
  25
  26         nr_regions = atoi(argv[1]);
  27         sz_region = atoi(argv[2]);
  28
  29         regions = malloc(sizeof(*regions) * nr_regions);
  30         for (i = 0; i < nr_regions; i++)
  31                 regions[i] = malloc(sz_region);
  32
  33         while (1) {
  34                 for (i = 0; i < nr_regions; i++) {
  35                         if (i % 2 == 0)
  36                                 memset(regions[i], i, sz_region);
  37                 }
  38         }
  39         return 0;
  40 }