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Re: [Xen-devel] Poor performance with Linux 3.x as dom0

On 02/05/12 14:11, Andreas Kinzler wrote:
> Hello Jeremy + Konrad + all kernel devs,
> while it is great to see that vanilla dom0 seems to work, the
> performance breakdown compared to xenified 2.6.34 (from opensuse) is
> huge. Here are my benchmarks:
> Xen 4.1.1, Xeon E5620, Supermicro X8DTi-F, 12 GB RAM, dom0 2 VCPUs
> time emerge apache:
>         3.2.12-dom0    3.3.4-dom0
>     real    1m0.560s    0m59.971s    0m47.689s
>     user    0m40.939s    0m40.619s    0m41.355s
>     sys     0m18.865s    0m18.305s    0m11.441s

Can you apply 7eb7ce4d2e8991aff4ecb71a81949a907ca755ac "xen: correctly
check for pending events when restoring irq flags"[1] and see how much
it helps?

This patch is in 3.4-rc5 and is queued for 3.3.5.



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