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Update filterHints:

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- Only append valid preferred-true hints to filtered
- Return true if allResourceHints only consist of
nil-affinity/preferred-true hints: {nil true}, update defaultHint
preference accordingly.
This commit is contained in:
nolancon 2019-12-09 08:22:47 +00:00
parent 9f21f49493
commit 17d615bca2
1 changed files with 27 additions and 7 deletions
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34
pkg/kubelet/cm/topologymanager/policy_single_numa_node.go
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@ -100,23 +100,34 @@ func (p *singleNumaNodePolicy) getHintMatch(allResourcesHints [][]TopologyHint)
return foundMatch, match
}
// Return hints that have valid bitmasks with exactly one bit set
func (p *singleNumaNodePolicy) filterHints(allResourcesHints [][]TopologyHint) [][]TopologyHint {
// Return hints that have valid bitmasks with exactly one bit set. Also return bool
// which indicates whether allResourceHints only consists of {nil true} hints.
func (p *singleNumaNodePolicy) filterHints(allResourcesHints [][]TopologyHint) ([][]TopologyHint, bool) {
var filteredResourcesHints [][]TopologyHint
var noAffinityPreferredHints int
var totalHints int
if len(allResourcesHints) > 0 {
for _, oneResourceHints := range allResourcesHints {
var filtered []TopologyHint
if len(oneResourceHints) > 0 {
for _, hint := range oneResourceHints {
if hint.NUMANodeAffinity != nil && hint.NUMANodeAffinity.Count() == 1 {
totalHints++
if hint.NUMANodeAffinity != nil && hint.NUMANodeAffinity.Count() == 1 && hint.Preferred == true {
filtered = append(filtered, hint)
}
if hint.NUMANodeAffinity == nil && hint.Preferred == true {
noAffinityPreferredHints++
}
}
}
filteredResourcesHints = append(filteredResourcesHints, filtered)
}
}
return filteredResourcesHints
// Check if all resource hints only consist of nil-affinity/preferred hint: {nil true}.
if noAffinityPreferredHints == totalHints {
return filteredResourcesHints, true
}
return filteredResourcesHints, false
}
func (p *singleNumaNodePolicy) mergeProvidersHints(providersHints []map[string][]TopologyHint) TopologyHint {
@ -164,16 +175,25 @@ func (p *singleNumaNodePolicy) mergeProvidersHints(providersHints []map[string][
return defaultHint
}
allResourcesHints = p.filterHints(allResourcesHints)
// if no hints or there is a resource with empty hints after filtering, then policy cannot be satisfied
var noAffinityPreferredOnly bool
allResourcesHints, noAffinityPreferredOnly = p.filterHints(allResourcesHints)
// If no hints, then policy cannot be satisfied
if len(allResourcesHints) == 0 {
klog.Infof("[topologymanager] No hints that align to a single NUMA node.")
return defaultHint
}
// If there is a resource with empty hints after filtering, then policy cannot be satisfied.
// In the event that the only hints that exist are {nil true} update default hint preferred
// to allow scheduling.
for _, hints := range allResourcesHints {
if len(hints) == 0 {
klog.Infof("[topologymanager] No hints that align to a single NUMA node for resource.")
return defaultHint
if !noAffinityPreferredOnly {
return defaultHint
} else if noAffinityPreferredOnly {
defaultHint.Preferred = true
return defaultHint
}
}
}