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Re: xennet performance collapses with multiple vCPU
On Mon, Apr 13, 2020 at 04:01:39PM +0000, Andrew Doran wrote:
> This confirms my suspicion and is why I wanted to play with HZ. I think
> soft interrupt processing is being driven off the clock interrupt. Maybe
> hardware interrupt processing but I think that's less likely. Native x86
> configured the same way does not behave like this. Hmm. I will play around
> with it some more.
I did some checks in this area; including KASSERT() in idle_block() that
that ci_ipending is 0 before and after sleeping.
I wonder if it could be an issue with IPIs instead.
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
NetBSD: 26 ans d'experience feront toujours la difference
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