From: Avi Kivity <avi@redhat.com>
To: Gregory Haskins <gregory.haskins@gmail.com>
Cc: alacrityvm-devel@lists.sourceforge.net,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
netdev@vger.kernel.org
Subject: Re: AlacrityVM benchmark numbers updated
Date: Wed, 26 Aug 2009 22:23:12 +0300 [thread overview]
Message-ID: <4A958BA0.2000801@redhat.com> (raw)
In-Reply-To: <4A95822D.9060207@gmail.com>
On 08/26/2009 09:42 PM, Gregory Haskins wrote:
> Actually, I have already look at this and it does indeed seem better to
> use switch_mm+gupf() over gup() by quite a large margin. You could then
> couple that with your DMA-engine idea to potentially gain even more
> benefits (though probably not for networking since most NICs have their
> own DMA engine anyway).
>
>
For tx, we'll just go copyless once we plumb the destructors properly.
But for rx on a shared interface it is impossible to avoid the copy.
You can only choose if you want it done by the cpu or a local dma engine.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
next prev parent reply other threads:[~2009-08-26 19:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-26 1:01 AlacrityVM benchmark numbers updated Gregory Haskins
2009-08-26 10:16 ` Avi Kivity
2009-08-26 18:42 ` Gregory Haskins
2009-08-26 19:23 ` Avi Kivity [this message]
2009-08-26 20:05 ` Gregory Haskins
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