lib/group_cpus: make group CPU cluster aware #348
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As CPU core counts increase, the number of NVMe IRQs may be smaller than the total number of CPUs. This forces multiple CPUs to share the same IRQ. If the IRQ affinity and the CPU’s cluster do not align, a performance penalty can be observed on some platforms. This patch improves IRQ affinity by grouping CPUs by cluster within each NUMA domain, ensuring better locality between CPUs and their assigned NVMe IRQs. Reviewed-by: Tianyou Li <[email protected]> Reviewed-by: Tim Chen <[email protected]> Tested-by: Dan Liang <[email protected]> Signed-off-by: Wangyang Guo <[email protected]>
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Pull request for series with
subject: lib/group_cpus: make group CPU cluster aware
version: 1
url: https://patchwork.kernel.org/project/linux-block/list/?series=1021835