Comment 9 for bug 1066055
Revision history for this message
| Stefan Hajnoczi (stefanha) wrote Re: [PATCH] virtio: limit avail bytes lookahead | #9 |
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a60fb26
(Get the code!)
On Fri, Nov 2, 2012 at 3:48 PM, Michael S. Tsirkin <email address hidden> wrote:
> On Fri, Nov 02, 2012 at 11:18:18AM +0100, Stefan Hajnoczi wrote:
>> On Thu, Nov 1, 2012 at 5:07 PM, Michael S. Tsirkin <email address hidden> wrote:
>> > Commit 0d8d7690850eb0c
>> > a regression in virtio-net performance because it looks
>> > into the ring aggressively while we really only care
>> > about a single packet worth of buffers.
>> > To fix, add parameters limiting lookahead, and
>> > use in virtqueue_
>> >
>> > Signed-off-by: Michael S. Tsirkin <email address hidden>
>> > Reported-by: Edivaldo de Araujo Pereira <email address hidden>
>>
>> Nice, much simpler than the ideas I had.
>>
>> Reviewed-by: Stefan Hajnoczi <email address hidden>
>
> Anthony could you apply this out of band please so this stops
> biting people?
Especially for the 1.3 release so that we don't have a virtio
performance regression.
Stefan