Subject: Re: [PATCH] virtio: Avoid virtio_net TX queue over run

From: Shirley Ma <[email-masked]>
Date: Thu, 17 Mar 2011 11:49:18 -0700

On Thu, 2011-03-17 at 10:01 -0700, Shirley Ma wrote:
> On Thu, 2011-03-17 at 17:58 +0100, Eric Dumazet wrote:
> > Could you run your tests with only one cpu ?
> > (offline all cpus but cpu0 on your hypervisor)
> > 
> > Dropping packets is fine, unless consumer cant run ;) 
> 
> Sure, will report the data soon. 

With a single CPU, before/after with this patch the performance has no
difference for both UDP and TCP, and it seems hitting TX overrun, CPU is
100% used.

Thanks
Shirley