t.Errorf("stats.PauseEnd[%d] = %d, want %d", i, dt.UnixNano(), mstats.PauseEnd[off])
		}
		off = (off + len(mstats.PauseEnd) - 1) % len(mstats.PauseEnd)
	}
}

var big []byte

func TestFreeOSMemory(t *testing.T) {
	// Tests FreeOSMemory by making big susceptible to collection
	// and checking that at least that much memory is returned to
	// the OS after.

	const bigBytes = 32 << 20