linux-kernel - RE: [RFC PATCH v8 00/16] Provide a zero-copy method on KVM virtio-net.

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Message-ID: <1280850620.3391.4.camel@localhost.localdomain>
Date:	Tue, 03 Aug 2010 08:50:20 -0700
From:	Shirley Ma <mashirle@...ibm.com>
To:	"Xin, Xiaohui" <xiaohui.xin@...el.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"mst@...hat.com" <mst@...hat.com>, "mingo@...e.hu" <mingo@...e.hu>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
	"jdike@...ux.intel.com" <jdike@...ux.intel.com>
Subject: RE: [RFC PATCH v8 00/16] Provide a zero-copy method on KVM
 virtio-net.

Hello Xiaohui,

On Tue, 2010-08-03 at 16:48 +0800, Xin, Xiaohui wrote:
> May you share me with your performance results (including BW and
> latency)on 
> vhost-net and how you get them(your configuration and especially with
> the affinity 
> settings)? 

My macvtap zero copy is incomplete, I am testing sendmsg only now. The
initial performance is not good especially for latency (zero copy vs.
copy). I am still working on it to find out why and how to improve.
That's the reason I am eager to know your performance results and how
much performance gain you have seen.

Since your patch has completed. I would try your patch here for
performance. If you have some performance results to share here that
would be great.

Thanks
Shirley

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