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31 #include <sys/types.h>
36 #define CHUNK (128 * 1024)
38 void usage(const char *prog, FILE *out)
40 fprintf(out, "usage: %s allocsize\n", prog);
41 fprintf(out, " allocsize is kbytes, or number[KMGP] (P = pages)\n");
45 int main(int argc, char *argv[])
47 long long kbtotal = 0, kballoc;
48 int i, j, k, numchunk, alloc, sum, rc = 0;
53 kbtotal = strtoull(argv[1], &end, 0);
71 usage(argv[0], stderr);
76 if (argc != 2 || kbtotal == 0)
77 usage(argv[0], stderr);
79 numchunk = (kbtotal + CHUNK - 1) / CHUNK;
80 mem = calloc(numchunk, sizeof(*mem));
82 fprintf(stderr, "error allocating initial chunk array\n");
87 printf("[%d] allocating %lld kbytes in %u kbyte chunks\n",
88 getpid(), kbtotal, alloc);
89 for (i = kballoc = 0; i < numchunk && alloc > 0; i++, kballoc += alloc){
90 if (kbtotal - kballoc < alloc)
91 alloc = kbtotal - kballoc;
93 while (alloc > 0 && (mem[i] = malloc(alloc * 1024)) == NULL) {
94 fprintf(stderr, "malloc(%u) failed (%lld/%lld)\n",
95 alloc * 1024, kballoc, kbtotal);
101 printf("touching %p ([%lld-%lld]/%lld)\n", mem[i], kballoc,
102 kballoc + alloc - 1, kbtotal);
103 for (j = 0, tmp = mem[i]; j < alloc; j += 4) {
104 for (k = 0, sum = 0; k < 4095; k++, tmp++)
113 printf("touched %lld kbytes\n", kballoc);
116 printf("verifying %lld kbytes in %u kbyte chunks\n", kbtotal, alloc);
117 for (i = kballoc = 0; i < numchunk; i++, kballoc += alloc) {
118 if (kbtotal - kballoc < alloc)
119 alloc = kbtotal - kballoc;
123 printf("verifying %p (%lld/%lld)\n",
124 tmp, kballoc, kbtotal);
125 for (j = 0; j < alloc; j += 4) {
126 for (k = 0, sum = 0; k < 4095; k++, tmp++)
129 fprintf(stderr, "sum %x != %x at %p\n",
130 *tmp, sum, tmp - 4092);
136 printf("verified %lld kbytes\n", kballoc);