netdev - Re: [RFC PATCH 1/1] vhost: TX used buffer guest signal accumulation

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Message-ID: <20101029081158.GC22688@redhat.com>
Date:	Fri, 29 Oct 2010 10:11:58 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Shirley Ma <mashirle@...ibm.com>
Cc:	Sridhar Samudrala <sri@...ibm.com>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 1/1] vhost: TX used buffer guest signal accumulation

On Thu, Oct 28, 2010 at 02:40:50PM -0700, Shirley Ma wrote:
> On Thu, 2010-10-28 at 14:04 -0700, Sridhar Samudrala wrote:
> > It would be some change in virtio-net driver that may have improved
> > the
> > latency of small messages which in turn would have reduced the
> > bandwidth
> > as TCP could not accumulate and send large packets.
> 
> I will check out any latency improvement patch in virtio_net. If that's
> the case, whether it is good to have some tunable parameter to benefit
> both BW and latency workload?
> 
> Shirley 

No, we need it to work well automatically somehow.

-- 
MST
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