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From: David Becker <becker@cs.duke.edu>
To: Ian Pratt <Ian.Pratt@cl.cam.ac.uk>
Cc: Keir Fraser <keir.fraser@cl.cam.ac.uk>, xen-devel@lists.sourceforge.net
Subject: Re: Xen cluster n/w performance (again!)
Date: Tue, 30 Nov 2004 16:09:43 -0500	[thread overview]
Message-ID: <20041130210943.GV1102@cs.duke.edu> (raw)
In-Reply-To: <E1CWiw8-0005a7-00@mta1.cl.cam.ac.uk>


" Is anyone else still seeing network performance anomalies? 

I still cannot get over 500Mbps into xenU with any hardware that I have.
This holds using kernels I build, or using kernel binaries from
the 2.0.1 tarball.

I tried tuning a e1000 driver, which greatly reduced the interrupt count,
but had no effect on bandwidth.

I can get 600 to 750 Mbps into domain-0 from a stock linux host. 
That rate then drops to around 500 after starting the etherbridge.
Running top on Domain-0 claims the domain is over 60% idle.

This is with e1000 and bcm5703 NICs on IBM x335, Dell 1650 and
other platforms, and a variety of CPU clock speeds.
Running iperf under stock linux 2.4.25 gets 940Mbps between any of them.



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  reply	other threads:[~2004-11-30 21:09 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-11-21  6:37 Xen cluster n/w performance (again!) Diwaker Gupta
2004-11-21 10:52 ` Ian Pratt
2004-11-21 20:10   ` Keir Fraser
2004-11-23 21:32     ` Diwaker Gupta
2004-11-23 22:14       ` Ian Pratt
2004-11-30 21:09         ` David Becker [this message]
2004-11-30 21:42           ` Ian Pratt
2004-11-30 23:42             ` David Becker
2004-12-01  9:09               ` Keir Fraser
2004-12-03 21:23               ` David Becker
2004-11-22 15:28   ` Xen cluster n/w performance David Becker

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