global time_in_gc, tmp_ts

probe process.mark("gc-start")
{
	tmp_ts[$arg1] = gettimeofday_ns();
}

probe process.mark("gc-end")
{
	delta = gettimeofday_ns() - tmp_ts[$arg1];
	time_in_gc <<< delta;
	delete tmp_ts[$arg1];
}

probe end
{
	printf("Total GC passes: %d\n", @count(time_in_gc));
	print(@hist_log(time_in_gc));
	printf("Total time spent in GC: %d ns\n", @sum(time_in_gc));
}