kubernetes/pkg/apis/core/v1/helper/qos/qos.go

var supportedQoSComputeResources …

type QOSList …

func isSupportedQoSComputeResource(name v1.ResourceName) bool { … }

// 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 { … }

// ComputePodQOS evaluates the list of containers to determine a pod's QoS class. This function is more
// expensive than GetPodQOS which should be used for pods having a non-empty .Status.QOSClass.
// A pod is besteffort if none of its containers have specified any requests or limits.
// A pod is guaranteed only when requests and limits are specified for all the containers and they are equal.
// A pod is burstable if limits and requests do not match across all containers.
func ComputePodQOS(pod *v1.Pod) v1.PodQOSClass { … }