topologymanager

Documentation

Index

• Constants
• type HintProvider
• type Manager
  • func NewFakeManager() Manager
  • func NewManager(numaNodeInfo cputopology.NUMANodeInfo, topologyPolicyName string) (Manager, error)
• type Policy
  • func NewBestEffortPolicy(numaNodes []int) Policy
  • func NewNonePolicy() Policy
  • func NewRestrictedPolicy(numaNodes []int) Policy
  • func NewSingleNumaNodePolicy(numaNodes []int) Policy
• type Store
• type TopologyHint
  • func (th *TopologyHint) IsEqual(topologyHint TopologyHint) bool
  • func (th *TopologyHint) LessThan(other TopologyHint) bool

Constants

const PolicyBestEffort string = "best-effort"

PolicyBestEffort policy name.

const PolicyNone string = "none"

PolicyNone policy name.

const PolicyRestricted string = "restricted"

PolicyRestricted policy name.

const PolicySingleNumaNode string = "single-numa-node"

PolicySingleNumaNode policy name.

Types

type HintProvider

type HintProvider interface {
	// GetTopologyHints returns a map of resource names to a list of possible
	// concrete resource allocations in terms of NUMA locality hints. Each hint
	// is optionally marked "preferred" and indicates the set of NUMA nodes
	// involved in the hypothetical allocation. The topology manager calls
	// this function for each hint provider, and merges the hints to produce
	// a consensus "best" hint. The hint providers may subsequently query the
	// topology manager to influence actual resource assignment.
	GetTopologyHints(pod *v1.Pod, container *v1.Container) map[string][]TopologyHint
}

HintProvider is an interface for components that want to collaborate to achieve globally optimal concrete resource alignment with respect to NUMA locality.

type Manager

type Manager interface {
	//Manager implements pod admit handler interface
	lifecycle.PodAdmitHandler
	//Adds a hint provider to manager to indicate the hint provider
	//wants to be consoluted when making topology hints
	AddHintProvider(HintProvider)
	//Adds pod to Manager for tracking
	AddContainer(pod *v1.Pod, containerID string) error
	//Removes pod from Manager tracking
	RemoveContainer(containerID string) error
	//Interface for storing pod topology hints
	Store
}

Manager interface provides methods for Kubelet to manage pod topology hints

func NewFakeManager

func NewFakeManager() Manager

NewFakeManager returns an instance of FakeManager

func NewManager

func NewManager(numaNodeInfo cputopology.NUMANodeInfo, topologyPolicyName string) (Manager, error)

NewManager creates a new TopologyManager based on provided policy

type Policy

type Policy interface {
	// Returns Policy Name
	Name() string
	// Returns a merged TopologyHint based on input from hint providers
	// and a Pod Admit Handler Response based on hints and policy type
	Merge(providersHints []map[string][]TopologyHint) (TopologyHint, bool)
}

Policy interface for Topology Manager Pod Admit Result

func NewBestEffortPolicy

func NewBestEffortPolicy(numaNodes []int) Policy

NewBestEffortPolicy returns best-effort policy.

func NewNonePolicy

func NewNonePolicy() Policy

NewNonePolicy returns none policy.

func NewRestrictedPolicy

func NewRestrictedPolicy(numaNodes []int) Policy

NewRestrictedPolicy returns restricted policy.

func NewSingleNumaNodePolicy

func NewSingleNumaNodePolicy(numaNodes []int) Policy

NewSingleNumaNodePolicy returns single-numa-node policy.

type Store

type Store interface {
	GetAffinity(podUID string, containerName string) TopologyHint
}

Store interface is to allow Hint Providers to retrieve pod affinity

type TopologyHint

type TopologyHint struct {
	NUMANodeAffinity bitmask.BitMask
	// Preferred is set to true when the NUMANodeAffinity encodes a preferred
	// allocation for the Container. It is set to false otherwise.
	Preferred bool
}

TopologyHint is a struct containing the NUMANodeAffinity for a Container

func (*TopologyHint) IsEqual

func (th *TopologyHint) IsEqual(topologyHint TopologyHint) bool

IsEqual checks if TopologyHint are equal

func (*TopologyHint) LessThan

func (th *TopologyHint) LessThan(other TopologyHint) bool

LessThan checks if TopologyHint `a` is less than TopologyHint `b` this means that either `a` is a preferred hint and `b` is not or `a` NUMANodeAffinity attribute is narrower than `b` NUMANodeAffinity attribute.