From: Bin Ren <bin.ren@gmail.com>
To: David Becker <becker@cs.duke.edu>
Cc: xen-devel@lists.sourceforge.net
Subject: Re: etherbridge bottleneck
Date: Thu, 11 Nov 2004 12:00:53 +0000 [thread overview]
Message-ID: <8ae78025041111040013a4d891@mail.gmail.com> (raw)
In-Reply-To: <20041110214845.GU1102@cs.duke.edu>
Whenever you see a performance problem, please describe the following things:
(1) Is Xen running on a UP, SMP or HT?
(2) If Xen is running on a SMP or HT, are xen0 and xenU running
different processors or threads?
(3) Which scheduler in Xen are you using? Have you changed any parameters?
- Bin
On Wed, 10 Nov 2004 16:48:45 -0500, David Becker <becker@cs.duke.edu> wrote:
>
> I ran some iperf tests today and it looks like the etherbridge
> is the limiting factor on throughput. In the beforetime, I saw great
> throughput to the VMs; over 800 Mbps. With the bridge, the numbers
> are in the 400s somewhere.
> Is this the speed I can expect from the bridge?
> Is there some tuning I should try, or another way to get more bandwidth
> into the VMs?
>
> This is with xen-2.0, 2.4.27-xen0 and 2.4.27-xenU.
>
> My iperf numbers:
> 940 Mbps stock linux -> stock linux
> 470 Mbps stock linux -> xenU
> 533 Mbps xenU -> stock linux
>
> ether bridge speed
> 533 Mbps xenU -> xen0 on the same host
> 422 Mbps xen0 -> xenU on the same host
>
> loopback speed
> 4.4 Gbps stock linux
> 3.2 Gbps xenU
> 3.2 Gbps xen0
>
> (stock linux is 2.4.25)
>
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next prev parent reply other threads:[~2004-11-11 12:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-10 21:48 etherbridge bottleneck David Becker
2004-11-11 12:00 ` Bin Ren [this message]
2004-11-11 14:56 ` David Becker
-- strict thread matches above, loose matches on Subject: below --
2004-11-12 8:42 Ian Pratt
2004-11-14 19:53 Ian Pratt
2004-11-15 16:01 ` David Becker
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