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Merge pull request #126204 from vrutkovs/unsafeRecordQueried-atomicPointer

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feature_gate: avoid extra copy when queried feature is already stored, use Set instead of map
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Kubernetes Prow Robot 2024-07-22 09:09:42 -07:00 committed by GitHub
commit 0caeba5cbe
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1 changed files with 10 additions and 10 deletions
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20
staging/src/k8s.io/component-base/featuregate/feature_gate.go
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@ -30,6 +30,7 @@ import (
utilerrors "k8s.io/apimachinery/pkg/util/errors" utilerrors "k8s.io/apimachinery/pkg/util/errors"
"k8s.io/apimachinery/pkg/util/naming" "k8s.io/apimachinery/pkg/util/naming"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/version" "k8s.io/apimachinery/pkg/util/version"
featuremetrics "k8s.io/component-base/metrics/prometheus/feature" featuremetrics "k8s.io/component-base/metrics/prometheus/feature"
baseversion "k8s.io/component-base/version" baseversion "k8s.io/component-base/version"
@ -265,7 +266,7 @@ func NewVersionedFeatureGate(emulationVersion *version.Version) *featureGate {
f.enabled.Store(map[Feature]bool{}) f.enabled.Store(map[Feature]bool{})
f.enabledRaw.Store(map[string]bool{}) f.enabledRaw.Store(map[string]bool{})
f.emulationVersion.Store(emulationVersion) f.emulationVersion.Store(emulationVersion)
f.queriedFeatures.Store(map[Feature]struct{}{}) f.queriedFeatures.Store(sets.Set[Feature]{})
klog.V(1).Infof("new feature gate with emulationVersion=%s", f.emulationVersion.Load().String()) klog.V(1).Infof("new feature gate with emulationVersion=%s", f.emulationVersion.Load().String())
return f return f
} }
@ -530,7 +531,7 @@ func (f *featureGate) SetEmulationVersion(emulationVersion *version.Version) err
enabled := map[Feature]bool{} enabled := map[Feature]bool{}
errs := f.unsafeSetFromMap(enabled, enabledRaw, emulationVersion) errs := f.unsafeSetFromMap(enabled, enabledRaw, emulationVersion)
queriedFeatures := f.queriedFeatures.Load().(map[Feature]struct{}) queriedFeatures := f.queriedFeatures.Load().(sets.Set[Feature])
known := f.known.Load().(map[Feature]VersionedSpecs) known := f.known.Load().(map[Feature]VersionedSpecs)
for feature := range queriedFeatures { for feature := range queriedFeatures {
newVal := featureEnabled(feature, enabled, known, emulationVersion) newVal := featureEnabled(feature, enabled, known, emulationVersion)
@ -544,7 +545,7 @@ func (f *featureGate) SetEmulationVersion(emulationVersion *version.Version) err
// Persist changes // Persist changes
f.enabled.Store(enabled) f.enabled.Store(enabled)
f.emulationVersion.Store(emulationVersion) f.emulationVersion.Store(emulationVersion)
f.queriedFeatures.Store(map[Feature]struct{}{}) f.queriedFeatures.Store(sets.Set[Feature]{})
} }
return utilerrors.NewAggregate(errs) return utilerrors.NewAggregate(errs)
} }
@ -564,15 +565,14 @@ func (f *featureGate) featureSpec(key Feature) (FeatureSpec, error) {
} }
func (f *featureGate) unsafeRecordQueried(key Feature) { func (f *featureGate) unsafeRecordQueried(key Feature) {
queriedFeatures := map[Feature]struct{}{} queriedFeatures := f.queriedFeatures.Load().(sets.Set[Feature])
for k := range f.queriedFeatures.Load().(map[Feature]struct{}) {
queriedFeatures[k] = struct{}{}
}
if _, ok := queriedFeatures[key]; ok { if _, ok := queriedFeatures[key]; ok {
return return
} }
queriedFeatures[key] = struct{}{} // Clone items from queriedFeatures before mutating it
f.queriedFeatures.Store(queriedFeatures) newQueriedFeatures := queriedFeatures.Clone()
newQueriedFeatures.Insert(key)
f.queriedFeatures.Store(newQueriedFeatures)
} }
func featureEnabled(key Feature, enabled map[Feature]bool, known map[Feature]VersionedSpecs, emulationVersion *version.Version) bool { func featureEnabled(key Feature, enabled map[Feature]bool, known map[Feature]VersionedSpecs, emulationVersion *version.Version) bool {
@ -700,7 +700,7 @@ func (f *featureGate) DeepCopy() MutableVersionedFeatureGate {
fg.known.Store(known) fg.known.Store(known)
fg.enabled.Store(enabled) fg.enabled.Store(enabled)
fg.enabledRaw.Store(enabledRaw) fg.enabledRaw.Store(enabledRaw)
fg.queriedFeatures.Store(map[Feature]struct{}{}) fg.queriedFeatures.Store(sets.Set[Feature]{})
return fg return fg
} }