testCPUProfile(t, matches, func(dur time.Duration) {
		Do(context.Background(), Labels("key", "value"), func(context.Context) {
			cpuHogger(cpuHog1, &salt1, dur)
		})
	})
}

func TestLabelRace(t *testing.T) {
	testenv.MustHaveParallelism(t)
	// Test the race detector annotations for synchronization
	// between setting labels and consuming them from the
	// profile.