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repetition-testing/src/main_write_all_bytes.c

42 lines
1.3 KiB
C

#include "repetition_tester.c"
#include "utils.c"
static void test_write_to_all_bytes(struct repetitor *repetitor, uint8_t *buffer, uint64_t buffer_size, bool should_alloc) {
repetitor_clear(repetitor);
while (repetitor_repeat(repetitor, 2)) {
repetitor_start(repetitor);
alloc_buffer(should_alloc, &buffer, buffer_size);
repetitor_measure_start(repetitor);
for (int i = 0; i < buffer_size; i++) {
buffer[i] = (uint8_t)i;
}
repetitor_measure_stop(repetitor, buffer_size);
free_buffer(should_alloc, buffer);
repetitor_stop(repetitor);
}
}
int main_test_write_all_bytes() {
struct repetitor repetitor = {};
repetitor_init(&repetitor);
printf("CPU Frequency: %ldHz (~%.2fGHz)\n", repetitor.cpu_freq, (float)repetitor.cpu_freq/(1000*1000*1000));
uint64_t byte_count = 4096 * (1024 * 8);
uint8_t *buffer = malloc(sizeof(uint8_t) * byte_count);
memset(buffer, 0, byte_count); // Touch memory, so OS would be forced to page in the memory
while (repeat_cycle_forever(&repetitor)) {
test_write_to_all_bytes(&repetitor, buffer, byte_count, false);
repetitor_print_results_label(&repetitor, "write to all bytes + no malloc");
test_write_to_all_bytes(&repetitor, buffer, byte_count, true);
repetitor_print_results_label(&repetitor, "write to all bytes + malloc");
}
return 0;
}