}

  /** Returns a new bias. */
  private fun adapt(
    delta: Int,
    numpoints: Int,
    first: Boolean,
  ): Int {
    var delta =
      when {
        first -> delta / DAMP
        else -> delta / 2
      }
    delta += (delta / numpoints)
    var k = 0
    while (delta > ((BASE - TMIN) * TMAX) / 2) {
      delta /= (BASE - TMIN)
      k += BASE
    }

issue:
  - 47949
releaseNotes:
  - |
    **Enabled** [Delta xDS](https://www.envoyproxy.io/docs/envoy/latest/api-docs/xds_protocol#incremental-xds) by default. See upgrade notes for more information.
upgradeNotes:
  - title: Delta xDS on by default
    content: |
      In previous versions, Istio used the "State of the world" xDS protocol to configure Envoy.

// Returns list of goroutines that become runnable.
// delay < 0: blocks indefinitely
// delay == 0: does not block, just polls
// delay > 0: block for up to that many nanoseconds
func netpoll(delay int64) (gList, int32) {
	if epfd == -1 {
		return gList{}, 0
	}
	var waitms int32
	if delay < 0 {
		waitms = -1
	} else if delay == 0 {
		waitms = 0
	} else if delay < 1e6 {
		waitms = 1
	} else if delay < 1e15 {

// delay < 0: blocks indefinitely
// delay == 0: does not block, just polls
// delay > 0: block for up to that many nanoseconds
func netpoll(delay int64) (gList, int32) {
	if kq == -1 {
		return gList{}, 0
	}
	var tp *timespec
	var ts timespec
	if delay < 0 {
		tp = nil
	} else if delay == 0 {
		tp = &ts
	} else {
		ts.setNsec(delay)
		if ts.tv_sec > 1e6 {

// delay < 0: blocks indefinitely
// delay == 0: does not block, just polls
// delay > 0: block for up to that many nanoseconds
func netpoll(delay int64) (gList, int32) {
	if iocphandle == _INVALID_HANDLE_VALUE {
		return gList{}, 0
	}

	var entries [64]overlappedEntry
	var wait uint32
	var toRun gList
	mp := getg().m

	if delay >= 1e15 {

func netpollBreak() {}

func netpoll(delay int64) (gList, int32) {
	lock(&mtx)

	// If delay >= 0, we include a subscription of type Clock that we use as
	// a timeout. If delay < 0, we omit the subscription and allow poll_oneoff
	// to block indefinitely.
	pollsubs := subs
	if delay >= 0 {
		timeout := &subs[0]
		clock := timeout.u.subscriptionClock()
		clock.timeout = uint64(delay)
	} else {
		pollsubs = subs[1:]

		notetsleep(&netpollNote, delay)
		unlock(&netpollStubLock)
		// Guard against starvation in case the lock is contended
		// (eg when running TestNetpollBreak).
		osyield()
	}
	return gList{}, 0
}

func netpollinited() bool {
	return netpollInited.Load() != 0
}

func netpollAnyWaiters() bool {
	return false
}

func netpollAdjustWaiters(delta int32) {

		[]float64{1, 10000, 1000000, 4000000, 10000000, 40000000},
		monitoring.WithUnit(monitoring.Bytes),
	)
)

func recordXDSClients(version string, delta float64) {
	xdsClientTrackerMutex.Lock()
	defer xdsClientTrackerMutex.Unlock()
	xdsClientTracker[version] += delta
	xdsClients.With(versionTag.Value(version)).Record(xdsClientTracker[version])
}

	// A running goroutine emits a task begin.
	t.RawEvent(go122.EvEventBatch, nil, 1 /*gen*/, 0 /*thread ID*/, 0 /*timestamp*/, 5 /*batch length*/)
	t.RawEvent(go122.EvGoCreate, nil, 0 /*timestamp delta*/, 1 /*go ID*/, 0, 0)

	// Write an invalid batch event for the next generation.
	t.RawEvent(go122.EvEventBatch, nil, 2 /*gen*/, 0 /*thread ID*/, 0 /*timestamp*/, 50 /*batch length (invalid)*/)

                        break;
                      case 5:
                        map.getAndAdd(key, delta);
                        threadSum += delta;
                        break;
                      case 6:
                        long oldValue = map.put(key, delta);
                        threadSum += delta - oldValue;
                        break;
                      case 7: