Integrated: 8371701: Add ability to set NUMA-affinity for threads

[Joel Sikström]

On Wed, 12 Nov 2025 10:22:39 GMT, Joel Sikström <jsikstro at openjdk.org> wrote:

> Hello,
> 
> This PR adds support for setting the affinity of threads to run on CPUs associated with specific NUMA nodes on Linux. Support for this is needed for [JDK-8371702](https://bugs.openjdk.org/browse/JDK-8371702) to improve performance in the Relocation Phase of ZGC on a NUMA machine.
> 
> Testing:
> * I've run significant performance testing locally on a NUMA machine and performed functional testing to see that the affinity is actually changed. Affinity of a thread can be inspected on Linux using `taskset -cp <tid>`.
> * Running through Oracle's tier1-2

This pull request has now been integrated.

Changeset: 0a963b61
Author:    Joel Sikström <jsikstro at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/0a963b612d0fcbfe002340098341862096650945
Stats:     103 lines in 6 files changed: 103 ins; 0 del; 0 mod

8371701: Add ability to set NUMA-affinity for threads

Reviewed-by: aboldtch, ayang

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PR: https://git.openjdk.org/jdk/pull/28261