kubernetes/pkg/kubelet/cm/topologymanager/policy_single_numa_node.go
Kevin Klues adaa58b6cb Update TopologyManager.Policy.Merge() to return a simple bool
Previously, the verious Merge() policies of the TopologyManager all
eturned their own lifecycle.PodAdmitResult result. However, for
consistency in any failed admits, this is better handled in the
top-level Topology manager, with each policy only returning a boolean
about whether or not they would like to admit the pod or not. This
commit changes the semantics to match this logic.
2020-02-03 17:13:28 +00:00

81 lines
2.5 KiB
Go

/*
Copyright 2019 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package topologymanager
import (
"k8s.io/kubernetes/pkg/kubelet/cm/topologymanager/bitmask"
)
type singleNumaNodePolicy struct {
//List of NUMA Nodes available on the underlying machine
numaNodes []int
}
var _ Policy = &singleNumaNodePolicy{}
// PolicySingleNumaNode policy name.
const PolicySingleNumaNode string = "single-numa-node"
// NewSingleNumaNodePolicy returns single-numa-node policy.
func NewSingleNumaNodePolicy(numaNodes []int) Policy {
return &singleNumaNodePolicy{numaNodes: numaNodes}
}
func (p *singleNumaNodePolicy) Name() string {
return PolicySingleNumaNode
}
func (p *singleNumaNodePolicy) canAdmitPodResult(hint *TopologyHint) bool {
if !hint.Preferred {
return false
}
return true
}
// Return hints that have valid bitmasks with exactly one bit set.
func filterSingleNumaHints(allResourcesHints [][]TopologyHint) [][]TopologyHint {
var filteredResourcesHints [][]TopologyHint
for _, oneResourceHints := range allResourcesHints {
var filtered []TopologyHint
for _, hint := range oneResourceHints {
if hint.NUMANodeAffinity == nil && hint.Preferred == true {
filtered = append(filtered, hint)
}
if hint.NUMANodeAffinity != nil && hint.NUMANodeAffinity.Count() == 1 && hint.Preferred == true {
filtered = append(filtered, hint)
}
}
filteredResourcesHints = append(filteredResourcesHints, filtered)
}
return filteredResourcesHints
}
func (p *singleNumaNodePolicy) Merge(providersHints []map[string][]TopologyHint) (TopologyHint, bool) {
filteredHints := filterProvidersHints(providersHints)
// Filter to only include don't cares and hints with a single NUMA node.
singleNumaHints := filterSingleNumaHints(filteredHints)
bestHint := mergeFilteredHints(p.numaNodes, singleNumaHints)
defaultAffinity, _ := bitmask.NewBitMask(p.numaNodes...)
if bestHint.NUMANodeAffinity.IsEqual(defaultAffinity) {
bestHint = TopologyHint{nil, bestHint.Preferred}
}
admit := p.canAdmitPodResult(&bestHint)
return bestHint, admit
}