Re: [PATCHv9 0/8] kvm: eoi optimization support

[Avi Kivity <avi@redhat.com>]

On 06/24/2012 07:24 PM, Michael S. Tsirkin wrote:
> I'm looking at reducing the interrupt overhead for virtualized guests:
> some workloads spend a large part of their time processing interrupts.
> 
> On kvm, an EOI write from the guest causes an expensive exit to host; we
> avoid this using shared memory.
> 
> The patches work fine on my boxes. See individual patches
> for perf tests. You need to patch qemu to whitelist the kvm feature.
> qemu patch was sent separately.
> 
> The patches are against Linus's master and apply to kvm.git
> cleanly.  The last patch in the series, supplying the host
> part, also depends on the ISR optimization patch that I
> have for convenience included in the series (patch 2),
> I also included a documentation patch (patch 1) - it is
> here since it clarifies patch 2.  This revision does not yet address
> Thomas's idea of reworking the APIC page handling.  Changes to this
> optimization would require reworking this last patch in the series.
> 
> The rest of the patchset has not changed significantly since v2.

Thanks, applied.


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