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KEP-3327keps/sig-node/3327-align-by-socket

CPUManager policy option to align CPUs by Socket instead of by NUMA node

implementablealphasig-nodelatest v1.251 open finding
Starting with Kubernetes 1.22, a new CPUManager flag has facilitated the use of CPUManager Policy options(#2625) which enable users to customize their behavior based on workload requirements without having to introduce an entirely new policy. These policy options work together to ensure an optimized cpu set is allocated for workloads running on a cluster. Th… Full summary

Starting with Kubernetes 1.22, a new CPUManager flag has facilitated the use of CPUManager Policy options(#2625) which enable users to customize their behavior based on workload requirements without having to introduce an entirely new policy. These policy options work together to ensure an optimized cpu set is allocated for workloads running on a cluster. The two policy options that already exist are full-pcpus-only(#2625) and distribute-cpus-across-numa (#2902). With this KEP, a new CPUManager policy option is introduced which ensures that all CPUs on a socket are considered to be aligned. Thus, the CPUManager will send a broader set of preferred hints to TopologyManager, enabling the increased likelihood of the best hint to be socket aligned with respect to CPU and other devices managed by DeviceManager.

Facts

PRR approvers
@johnbelamaricalpha
Tracking issue
#3327(opens GitHub in a new tab) closednot_plannedclosed 2024-12-20 14:23 UTCsig/nodestage/alphalifecycle/rotten
Milestones
alpha v1.25beta v1.27stable v1.28
Participating SIGs
none
Feature gates
CPUManagerPolicyBetaOptions, CPUManagerPolicyAlphaOptions, CPUManagerPolicyOptions
Created / last updated
2022-06-02 / none
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