minitrace_test_mt.cpp

// Test minitrace with multiple threads.

#include <inttypes.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

#include "minitrace.h"

// Does some meaningless work.
int work(int cycles) {
	int a = cycles;
	for (int i = 0; i < cycles; i++) {
		a ^= 373;
		a = (a << 13) | (a >> (32 - 13));
	}
	return a;
}

void *worker_thread(void *param) {
	int id = (int)(intptr_t)param;
	char temp[256]; sprintf(temp, "Worker Thread %i", id);
	MTR_META_THREAD_NAME(temp);
	int x = 0;
	for (int i = 0; i < 32; i++) {
		MTR_BEGIN_I(__FILE__, "Worker", "ID", id);
		x += work((rand() & 0x7fff) * 1000);
		MTR_END(__FILE__, "Worker");
	}
	return (void *)(intptr_t)x;
}

void phase2() {
	for (int i = 0; i < 10000; i++) {
		MTR_BEGIN_FUNC();
		MTR_END_FUNC();
	}
}

int main() {
	int i;
	mtr_init("mt_trace.json");
	MTR_META_PROCESS_NAME("Multithreaded Test");
	MTR_META_THREAD_NAME("Main Thread");
	MTR_BEGIN_FUNC();
	#define NUMT 8
	pthread_t threads[NUMT];
	for (i = 0; i < NUMT; i++) {
		pthread_create(&threads[i], 0, &worker_thread, (void *)(intptr_t)i);
	}
	for (i = 0; i < NUMT; i++) {
		pthread_join(threads[i], 0);
	}
	phase2();

	MTR_END_FUNC();
	mtr_shutdown();
	return 0;
}