4d76b1c8de
- Move remaining logic from mergeProvidersHints to generic top level mergeFilteredHints function. - Add numaNodes as parameter in order to make generic. - Move single NUMA node specific check to single-numa-node Merge function.
88 lines
2.8 KiB
Go
88 lines
2.8 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package topologymanager
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import (
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"k8s.io/kubernetes/pkg/kubelet/cm/topologymanager/bitmask"
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"k8s.io/kubernetes/pkg/kubelet/lifecycle"
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)
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type singleNumaNodePolicy struct {
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//List of NUMA Nodes available on the underlying machine
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numaNodes []int
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}
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var _ Policy = &singleNumaNodePolicy{}
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// PolicySingleNumaNode policy name.
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const PolicySingleNumaNode string = "single-numa-node"
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// NewSingleNumaNodePolicy returns single-numa-node policy.
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func NewSingleNumaNodePolicy(numaNodes []int) Policy {
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return &singleNumaNodePolicy{numaNodes: numaNodes}
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}
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func (p *singleNumaNodePolicy) Name() string {
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return PolicySingleNumaNode
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}
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func (p *singleNumaNodePolicy) canAdmitPodResult(hint *TopologyHint) lifecycle.PodAdmitResult {
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if !hint.Preferred {
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return lifecycle.PodAdmitResult{
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Admit: false,
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Reason: "Topology Affinity Error",
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Message: "Resources cannot be allocated with Topology Locality",
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}
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}
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return lifecycle.PodAdmitResult{
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Admit: true,
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}
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}
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// Return hints that have valid bitmasks with exactly one bit set.
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func filterSingleNumaHints(allResourcesHints [][]TopologyHint) [][]TopologyHint {
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var filteredResourcesHints [][]TopologyHint
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for _, oneResourceHints := range allResourcesHints {
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var filtered []TopologyHint
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for _, hint := range oneResourceHints {
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if hint.NUMANodeAffinity == nil && hint.Preferred == true {
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filtered = append(filtered, hint)
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}
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if hint.NUMANodeAffinity != nil && hint.NUMANodeAffinity.Count() == 1 && hint.Preferred == true {
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filtered = append(filtered, hint)
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}
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}
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filteredResourcesHints = append(filteredResourcesHints, filtered)
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}
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return filteredResourcesHints
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}
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func (p *singleNumaNodePolicy) Merge(providersHints []map[string][]TopologyHint) (TopologyHint, lifecycle.PodAdmitResult) {
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filteredHints := filterProvidersHints(providersHints)
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// Filter to only include don't cares and hints with a single NUMA node.
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singleNumaHints := filterSingleNumaHints(filteredHints)
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bestHint := mergeFilteredHints(p.numaNodes, singleNumaHints)
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defaultAffinity, _ := bitmask.NewBitMask(p.numaNodes...)
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if bestHint.NUMANodeAffinity.IsEqual(defaultAffinity) {
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bestHint = TopologyHint{nil, bestHint.Preferred}
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}
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admit := p.canAdmitPodResult(&bestHint)
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return bestHint, admit
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}
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