overflowed := totalTraceSamples >= 1900
		if traceSamples < pprofSamples {
			t.Logf("execution trace did not include all CPU profile samples; %d in profile, %d in trace", pprofSamples, traceSamples)
			if !overflowed {
				t.Fail()
			}
		}

		for stack, traceSamples := range traceStacks {
			pprofSamples := pprofStacks[stack]
			delete(pprofStacks, stack)
			if traceSamples < pprofSamples {