Re: [PATCH] sched/fair: Stabilize idle SMT core selection with asym-capacity

[Peter Zijlstra]

On Fri, Jul 03, 2026 at 04:52:17PM +0200, Andrea Righi wrote:

> As mentioned in my other email, I found a surprising asymmetry on this machine:
> pinning one worker per core to the first SMT siblings gives substantially better
> performance than pinning them to the second siblings, despite firmware
> advertising identical capacity and frequency for both.

Cute, that's something that Power7 also had. That's where
SD_ASYM_PACKING originated from.