Stupid, simple memory exerciser.

memtest.c

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

main(argc,argv)
  int argc;
  char **argv;
{
  char *array;
  unsigned long long int  n_bytes,t,i,j;

  if(argc < 3)
  {
    printf("\nUsage: %s n_bytes sleep_time\n\n",argv[0]);
    exit(1);
  }

  n_bytes = strtoull(argv[1],NULL,10);
  t       = strtoul(argv[2],NULL,10);

  printf("allocating %llu bytes...\n",n_bytes);
  if ((array=(char *)malloc(n_bytes*sizeof(char)))==NULL) {
    fprintf(stderr, "File %s, Line %ld: Out of memory while allocating %llu bytes.\n", __FILE__, (long)__LINE__, n_bytes);
    exit(1);
  }

  printf("writing %llu bytes...\n",n_bytes);
  for (i=0;i<n_bytes;i++) {
    array[i] = i;
  }

  printf("reading %llu bytes...\n",n_bytes);
  for (i=0;i<n_bytes;i++) {
    j=array[i];
  }

  printf("sleeping for %u seconds...\n",t);
  sleep(t);

  exit(0);
}