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SubjectRe: [patch 0/9] mutex subsystem, -V4
Arjan van de Ven <arjan@infradead.org> wrote:
>
>
> > hm. 16 CPUs hitting the same semaphore at great arrival rates. The cost
> > of a short spin is much less than the cost of a sleep/wakeup. The machine
> > was doing 100,000 - 200,000 context switches per second.
>
> interesting.. this might be a good indication that a "spin a bit first"
> mutex slowpath for some locks might be worth implementing...

If we see a workload which is triggering such high context switch rates,
maybe. But I don't think we've seen any such for a long time.

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