int main(int argc, char *argv[]) {
long num;
long i;
int size;
int sum = 0;
long overhead;
struct mallinfo info;
srand((unsigned int)time(NULL));
num = atol(argv[1]);
for(i = 0; i < num; i++) {
size = get_random_size();
malloc(size);
sum += size;
}
fprintf(stderr, "Sum: %d\n", sum);
malloc_stats();
info = mallinfo();
fprintf(stderr, "info.arena: %d\n", info.arena);
overhead = info.arena - sum;
fprintf(stderr, "%lu (%lu%%)\n", overhead, 100*overhead / info.arena);
return 0;
}
//creates random object properties and stores them in call-by-reference arguments
void get_random_object_props(MContext *mc,
size_t *size,
unsigned int *liveness,
unsigned int *num_objects,
lifetime_size_class_type *type) {
unsigned int lt = get_random_liveness(mc);
unsigned int sz = get_random_size(mc);
unsigned int sc = get_sizeclass(sz);
unsigned int effect_of_sizeclass = (mc->gopts->max_object_sc - sc) + 1;
effect_of_sizeclass *= effect_of_sizeclass; //quadratic impact
unsigned int effect_of_liveness = (mc->gopts->max_liveness - lt) + 1;
effect_of_liveness *= effect_of_liveness; //quadratic impact
//output parameters
*size = sz;
*liveness = lt;
*num_objects = effect_of_sizeclass * effect_of_liveness;
assert(*num_objects > 0);
assert(sz <= (BIT_ZERO << mc->gopts->max_object_sc));
*type = get_random_lifetime_size_class_type(mc);
}
int main(int argc, char *argv[]) {
void **ptrs;
long num;
long i;
int loop;
srand((unsigned int)time(NULL));
num = atol(argv[1]);
ptrs = malloc(sizeof(void*) * num);
for(i = 0; i < num; i++) {
ptrs[i] = malloc(get_random_size());
}
_reset_clock();
for(loop = 0; loop < NUM_LOOPS; loop++) {
for(i = 0; i < num; i++) {
if((rand() % 2) == 0) {
free(ptrs[i]);
ptrs[i] = NULL;
}
}
for(i = 0; i < num; i++) {
if(ptrs[i] == NULL) {
_resume();
ptrs[i] = malloc(get_random_size());
_pause();
}
}
}
_print_elapsed_time();
return 0;
}