From: Shirley Ma <mashirle@us.ibm.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
Rusty Russell <rusty@rustcorp.com.au>,
David Miller <davem@davemloft.net>,
kvm@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH] virtio: Avoid virtio_net TX queue over run
Date: Thu, 17 Mar 2011 11:49:18 -0700 [thread overview]
Message-ID: <1300387758.3255.56.camel@localhost.localdomain> (raw)
In-Reply-To: <1300381265.3255.54.camel@localhost.localdomain>
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
next prev parent reply other threads:[~2011-03-17 18:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-17 0:09 [PATCH] virtio: Avoid virtio_net TX queue over run Shirley Ma
2011-03-17 5:05 ` Michael S. Tsirkin
2011-03-17 16:50 ` Shirley Ma
2011-03-17 16:58 ` Eric Dumazet
2011-03-17 17:01 ` Shirley Ma
2011-03-17 18:49 ` Shirley Ma [this message]
2011-03-17 18:52 ` Shirley Ma
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