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Add new CPUManager policy option for "distribute-cpus-across-numa"

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This commit only adds the option to the policy options framework. A
subsequent commit will add the logic to utilize it.

The KEP describing this new option can be found here:
https://github.com/kubernetes/enhancements/tree/master/keps/sig-node/2902-cpumanager-distribute-cpus-policy-option

Signed-off-by: Kevin Klues <kklues@nvidia.com>
This commit is contained in:
Kevin Klues 2021-10-12 09:24:05 +00:00
parent 0cef26182c
commit 0e7928edce
1 changed files with 15 additions and 4 deletions
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19
pkg/kubelet/cm/cpumanager/policy_options.go
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@ -26,13 +26,15 @@ import (
)
const (
// FullPCPUsOnlyOption is the name of the CPU Manager policy option
FullPCPUsOnlyOption string = "full-pcpus-only"
FullPCPUsOnlyOption string = "full-pcpus-only"
DistributeCPUsAcrossNUMAOption string = "distribute-cpus-across-numa"
)
var (
alphaOptions = sets.NewString()
betaOptions = sets.NewString(
alphaOptions = sets.NewString(
DistributeCPUsAcrossNUMAOption,
)
betaOptions = sets.NewString(
FullPCPUsOnlyOption,
)
stableOptions = sets.NewString()
@ -64,6 +66,9 @@ type StaticPolicyOptions struct {
// any possible naming scheme will lead to ambiguity to some extent.
// We picked "pcpu" because it the established docs hints at vCPU already.
FullPhysicalCPUsOnly bool
// Flag to evenly distribute CPUs across NUMA nodes in cases where more
// than one NUMA node is required to satisfy the allocation.
DistributeCPUsAcrossNUMA bool
}
func NewStaticPolicyOptions(policyOptions map[string]string) (StaticPolicyOptions, error) {
@ -80,6 +85,12 @@ func NewStaticPolicyOptions(policyOptions map[string]string) (StaticPolicyOption
return opts, fmt.Errorf("bad value for option %q: %w", name, err)
}
opts.FullPhysicalCPUsOnly = optValue
case DistributeCPUsAcrossNUMAOption:
optValue, err := strconv.ParseBool(value)
if err != nil {
return opts, fmt.Errorf("bad value for option %q: %w", name, err)
}
opts.DistributeCPUsAcrossNUMA = optValue
default:
// this should never be reached, we already detect unknown options,
// but we keep it as further safety.