linux-kernel - Re: [Alacrityvm-devel] [GIT PULL] AlacrityVM guest drivers for 2.6.33

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Message-ID: <4B325EB8.4080300@gmail.com>
Date:	Wed, 23 Dec 2009 13:17:28 -0500
From:	Gregory Haskins <gregory.haskins@...il.com>
To:	"Peter W. Morreale" <pmorreale@...ell.com>
CC:	Andi Kleen <andi@...stfloor.org>, Avi Kivity <avi@...hat.com>,
	kvm@...r.kernel.org,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	netdev@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"alacrityvm-devel@...ts.sourceforge.net" 
	<alacrityvm-devel@...ts.sourceforge.net>,
	Anthony Liguori <anthony@...emonkey.ws>,
	Ingo Molnar <mingo@...e.hu>, torvalds@...ux-foundation.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [Alacrityvm-devel] [GIT PULL] AlacrityVM guest drivers for 2.6.33

On 12/23/09 12:52 PM, Peter W. Morreale wrote:
> On Wed, 2009-12-23 at 13:14 +0100, Andi Kleen wrote:
>>> http://www.redhat.com/f/pdf/summit/cwright_11_open_source_virt.pdf
>>>
>>> See slide 32.  This is without vhost-net.
>>
>> Thanks. Do you also have latency numbers?
>>
>> It seems like there's definitely still potential for improvement
>> with messages <4K. But for the large messages they indeed 
>> look rather good.
>>
>> It's unclear what message size the Alacrity numbers used, but I presume
>> it was rather large.
>>
> 
> No.  It was 1500.  Please see: 
> 
> http://developer.novell.com/wiki/index.php/AlacrityVM/Results
> 

Note: 1500 was the L2 MTU, not necessarily the L3/L4 size which was
probably much larger (though I do not recall what exactly atm).

-Greg



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