RE: [PATCH v2] lib/group_cpus: make group CPU cluster aware

"Guo, Wangyang" <[email protected]> Thu, 30 Jul 2026 06:58:07 +0000

Newsgroups	dev.linux.lists.virtualization,org.infradead.lists.linux-nvme,org.kernel.vger.linux-block,org.kernel.vger.linux-kernel
Message-ID	<DS0PR11MB801889FC50AAB91FCCAF8D3A92C92@DS0PR11MB8018.namprd11.prod.outlook.com>

> For higher number of jobs(>=64), we are seeing ~8% regression with this patch.
> 
> HW info:
> Intel(R) Core(TM) Ultra 7 265K
> CPU=20
> IRQ-CPU are 1:1 mapped.

If IRQ and CPUs are 1:1 mapping (20 IRQs/20 CPUs), the patch would not change anything. Every group is exactly 1 CPU, same as before.