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content/en/blog/_posts/2025-xx-xx-prefer-align-cpus-by-uncore-cache-beta/index.md

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The following diagram below illustrates uncore cache alignment when the feature is enabled.
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![cache-align-diagram](./cache-align-diagram.png)
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![Diagram showing an example workload CPU assignment, default static policy, and with prefer-align-cpus-by-uncorecache](./cache-align-diagram.png)
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By default, Kubernetes does not account for uncore cache topology; containers are assigned CPU resources using a packed methodology.
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As a result, Container 1 and Container 2 can experience a noisy neighbor impact due to
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`prefer-align-cpus-by-uncorecache` can be enabled on nodes with a monolithic uncore cache processor. The feature will mimic a best-effort socket alignment effect and will pack CPU resources on the socket similar to the default static CPU Manager policy.
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## Further reading
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See [Node Resource Managers](/docs/concepts/policy/node-resource-managers/) to learn more about the CPU Manager and the available policies.
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See [Node Resource Managers](/docs/concepts/policy/node-resource-managers/) to learn more about the CPU Manager and the available policies.
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Reference the documentation for `prefer-align-cpus-by-uncorecache` [here](/docs/concepts/policy/node-resource-managers/#prefer-align-cpus-by-uncorecache).
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Please see the [Kubernetes Enhancement Proposal](https://github.com/kubernetes/enhancements/tree/master/keps/sig-node/4800-cpumanager-split-uncorecache) for more information on how `prefer-align-cpus-by-uncorecache` is implemented.
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