preemptee: getTestPod(configSourceAnnotation(FileSource), &systemPriority, ""),
			expected:  false,
		},
	}
	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			isPreemtable := Preemptable(test.preemptor, test.preemptee)
			assert.Equal(t, test.expected, isPreemtable)
		})
	}
}

func TestIsCriticalPodBasedOnPriority(t *testing.T) {
	tests := []struct {
		priority int32

// can be preempted by preemptor pod.
func sortPodsByQOS(preemptor *v1.Pod, pods []*v1.Pod) (bestEffort, burstable, guaranteed []*v1.Pod) {
	for _, pod := range pods {
		if kubetypes.Preemptable(preemptor, pod) {
			switch v1qos.GetPodQOS(pod) {
			case v1.PodQOSBestEffort:
				bestEffort = append(bestEffort, pod)
			case v1.PodQOSBurstable:
				burstable = append(burstable, pod)

//
// This must be called from the system stack and the user goroutine on
// the current M (if any) must be in a preemptible state. This
// prevents deadlocks where two goroutines attempt to suspend each
// other and both are in non-preemptible states. There are other ways
// to resolve this deadlock, but this seems simplest.
//
// TODO(austin): What if we instead required this to be called from a

  NODE_LABELS="${NODE_LABELS},cloud.google.com/gke-preemptible=true"
  WINDOWS_NODE_LABELS="${WINDOWS_NODE_LABELS},cloud.google.com/gke-preemptible=true"
elif [[ "${PREEMPTIBLE_NODE}" = 'true' ]]; then
  NON_MASTER_NODE_LABELS="${NON_MASTER_NODE_LABELS},cloud.google.com/gke-preemptible=true"
  WINDOWS_NON_MASTER_NODE_LABELS="${WINDOWS_NON_MASTER_NODE_LABELS},cloud.google.com/gke-preemptible=true"
fi

# Optional: Enable netd.

    NODE_LABELS="${NODE_LABELS},cloud.google.com/gke-preemptible=true"
    WINDOWS_NODE_LABELS="${WINDOWS_NODE_LABELS},cloud.google.com/gke-preemptible=true"
elif [[ "${PREEMPTIBLE_NODE}" == "true" ]]; then
    NON_MASTER_NODE_LABELS="${NON_MASTER_NODE_LABELS},cloud.google.com/gke-preemptible=true"
    WINDOWS_NON_MASTER_NODE_LABELS="${WINDOWS_NON_MASTER_NODE_LABELS},cloud.google.com/gke-preemptible=true"
fi

	})
}

// getMCache is a convenience function which tries to obtain an mcache.
//
// Returns nil if we're not bootstrapping or we don't have a P. The caller's
// P must not change, so we must be in a non-preemptible state.
func getMCache(mp *m) *mcache {
	// Grab the mcache, since that's where stats live.
	pp := mp.p.ptr()
	var c *mcache
	if pp == nil {
		// We will be called without a P while bootstrapping,

	// Drain the pool of idle time.
	idleTime := l.idleTimePool.Load()
	if idleTime != 0 {
		l.idleTimePool.Add(-idleTime)
	}

	if !l.test {
		// Consume time from in-flight events. Make sure we're not preemptible so allp can't change.
		//
		// The reason we do this instead of just waiting for those events to finish and push updates
		// is to ensure that all the time we're accounting for happened sometime between lastUpdate

// true if it should be called again to free more.
func freeSomeWbufs(preemptible bool) bool {
	const batchSize = 64 // ~1–2 µs per span.
	lock(&work.wbufSpans.lock)
	if gcphase != _GCoff || work.wbufSpans.free.isEmpty() {
		unlock(&work.wbufSpans.lock)
		return false
	}
	systemstack(func() {
		gp := getg().m.curg
		for i := 0; i < batchSize && !(preemptible && gp.preempt); i++ {
			span := work.wbufSpans.free.first

}

// setUserArenaChunkToFault sets the address space for the user arena chunk to fault
// and releases any underlying memory resources.
//
// Must be in a non-preemptible state to ensure the consistency of statistics
// exported to MemStats.
func (s *mspan) setUserArenaChunkToFault() {
	if !s.isUserArenaChunk {
		throw("invalid span in heapArena for user arena")
	}

    --image-config-file="${image_config_file}" --system-spec-name="${system_spec_name}" \
    --runtime-config="${runtime_config}" --preemptible-instances="${preemptible_instances}" \
    --ssh-user="${ssh_user}" --ssh-key="${ssh_key}" --ssh-options="${ssh_options}" \
    --image-config-dir="${image_config_dir}" --node-env="${node_env}" \