func isSupportedQoSComputeResource(name core.ResourceName) bool {
	return supportedQoSComputeResources.Has(string(name))
}

// GetPodQOS returns the QoS class of a pod persisted in the PodStatus.QOSClass field.
// If PodStatus.QOSClass is empty, it returns value of ComputePodQOS() which evaluates pod's QoS class.
func GetPodQOS(pod *core.Pod) core.PodQOSClass {
	if pod.Status.QOSClass != "" {
		return pod.Status.QOSClass
	}
	return ComputePodQOS(pod)

func isSupportedQoSComputeResource(name v1.ResourceName) bool {
	return supportedQoSComputeResources.Has(string(name))
}

// GetPodQOS returns the QoS class of a pod persisted in the PodStatus.QOSClass field.
// If PodStatus.QOSClass is empty, it returns value of ComputePodQOS() which evaluates pod's QoS class.
func GetPodQOS(pod *v1.Pod) v1.PodQOSClass {
	if pod.Status.QOSClass != "" {
		return pod.Status.QOSClass
	}
	return ComputePodQOS(pod)
}

	if types.IsNodeCriticalPod(pod) {
		// Only node critical pod should be the last to get killed.
		return guaranteedOOMScoreAdj
	}

	switch v1qos.GetPodQOS(pod) {
	case v1.PodQOSGuaranteed:
		// Guaranteed containers should be the last to get killed.
		return guaranteedOOMScoreAdj
	case v1.PodQOSBestEffort:
		return besteffortOOMScoreAdj
	}

		// fall back to cluster's default tolerations.
		if ts == nil {
			ts = p.pluginConfig.Default
		}

		extraTolerations = ts
	}

	if qoshelper.GetPodQOS(pod) != api.PodQOSBestEffort {
		extraTolerations = append(extraTolerations, api.Toleration{
			Key:      corev1.TaintNodeMemoryPressure,
			Operator: api.TolerationOpExists,
			Effect:   api.TaintEffectNoSchedule,
		})