// without performing an osRelax. Since osRelax may reduce the
// precision of timers, this should be enough larger than the relaxed
// timer precision to keep the timer error acceptable.
const osRelaxMinNS = 0

var haveHighResSleep = true

// osRelax is called by the scheduler when transitioning to and from
// all Ps being idle.
func osRelax(relax bool) {}

// enableWER is called by setTraceback("wer").

// versions osRelax is noop.
// For Windows versions without high resolution timer, osRelax
// adjusts the system-wide timer resolution. Go needs a
// high resolution timer while running and there's little extra cost
// if we're already using the CPU, but if all Ps are idle there's no
// need to consume extra power to drive the high-res timer.
func osRelax(relax bool) uint32 {
	if haveHighResTimer {

					if next-now < sleep {
						sleep = next - now
					}
					shouldRelax := sleep >= osRelaxMinNS
					if shouldRelax {
						osRelax(true)
					}
					syscallWake = notetsleep(&sched.sysmonnote, sleep)
					if shouldRelax {
						osRelax(false)
					}
					lock(&sched.lock)
					sched.sysmonwait.Store(false)
					noteclear(&sched.sysmonnote)
				}
				if syscallWake {