1 /* 2 * EATMEM.C 3 * 4 * (c)Copyright 2003 Matthew Dillon <dillon@backplane.com>. This code is 5 * hereby placed in the public domain. 6 * 7 * This program 'eats' memory by allocating and touching it. Make sure your 8 * datasize resource limit is sufficient for the amount of memory you specify. 9 * 10 * $DragonFly: src/test/stress/eatmem.c,v 1.1 2003/08/25 19:41:00 dillon Exp $ 11 */ 12 #include <sys/types.h> 13 #include <sys/mman.h> 14 #include <stdio.h> 15 #include <stdlib.h> 16 #include <string.h> 17 #include <unistd.h> 18 19 int main(int ac,char ** av)20main(int ac, char **av) 21 { 22 size_t bytes; 23 size_t i; 24 char *ptr; 25 26 if (ac == 1) { 27 printf("eatmem MB [msec/page]\n"); 28 printf("specifying msec/page will cause eatmem to loop forever\n"); 29 exit(1); 30 } 31 bytes = strtoul(av[1], NULL, 0) * 1024 * 1024; 32 ptr = malloc(bytes); 33 34 for (;;) { 35 for (i = 0; i < bytes; i += 4096) { 36 ++ptr[i]; 37 if (av[2] && strtol(av[2], NULL, 0)) 38 usleep(1000 * strtol(av[2], NULL, 0)); 39 if (i == 0) 40 puts("loop0"); 41 } 42 if (ac != 3) 43 break; 44 puts("loop"); 45 } 46 puts("ok"); 47 sleep(10); 48 puts("done"); 49 exit(0); 50 } 51