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From: Jacob Gorm Hansen <jacobg@diku.dk>
To: xen-devel <xen-devel@lists.xensource.com>
Subject: Poor network performance in domU in unstable
Date: Tue, 26 Apr 2005 13:29:49 -0700	[thread overview]
Message-ID: <426EA4BD.6010004@diku.dk> (raw)

hi,

with unstable as of April 21st, I am getting fairly bad networking 
performance in my domUs, e.g 125Mbits/s TCP with iPerf over a gigabit 
link, where dom0 gets around 700Mbits/s.

This is with a non-debug build of Xen, with a bridged setup created with 
vmtools, and both with and without use of grant tables.

If I run Xen with hyperthreading enabled, the figure improves somewhat, 
to 165Mbits/s in domU.

Is anyone else seeing the same behaviour with unstable? Is there some 
magic switch I need to flip (that perhaps vmtools does not know about) 
to prevent domain I/O being throttled by Xen?

thanks,
Jacob

             reply	other threads:[~2005-04-26 20:29 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-04-26 20:29 Jacob Gorm Hansen [this message]
2005-04-26 20:36 ` Poor network performance in domU in unstable Steven Hand
2005-04-26 20:44   ` Jacob Gorm Hansen
2005-04-26 21:13     ` Andrew Theurer
2005-04-26 22:49       ` Jacob Gorm Hansen
2005-04-26 20:37 ` Nivedita Singhvi
2005-04-26 20:46   ` Jacob Gorm Hansen
2005-04-26 23:07 ` Jacob Gorm Hansen

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