From: Tupshin Harper <tupshin@tupshin.com>
To: Rik van Riel <riel@redhat.com>
Cc: xen-devel@lists.sourceforge.net
Subject: Re: horrible nfs server performance on domU
Date: Sat, 05 Mar 2005 14:17:49 -0800 [thread overview]
Message-ID: <422A300D.4080705@tupshin.com> (raw)
In-Reply-To: <Pine.LNX.4.61.0503051654100.31720@chimarrao.boston.redhat.com>
Rik van Riel wrote:
>On Fri, 4 Mar 2005, Tupshin Harper wrote:
>
>
>
>>the "fileserver" domU has 256Mb allocated with 512MB of swap. I'm gettin
>>horrendous nfs performance (samba not really tested yet), and the fileserver
>>domU frequently is pegged at 99+% system cpu all being use by pdflush. The
>>swap is active but is not being used.
>>
>>
>
>Time to try out whether profiling works in domU, so we can
>figure out exactly where cpu time is being spent. I'm willing
>to help you debug this problem.
>
>
>
Great. Let me know of anything I can try. I'm happy to build custom
kernels, try experimental patches, etc. I've never done any kernel
profiling, but I'm happy to give it a shot. If you are referring to
CONFIG_OPROFILE, then it seems that it's not selectable in a xen kernel atm
-Tupshin
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next prev parent reply other threads:[~2005-03-05 22:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-05 1:49 horrible nfs server performance on domU Tupshin Harper
2005-03-05 21:55 ` Rik van Riel
2005-03-05 22:17 ` Tupshin Harper [this message]
2005-03-06 0:14 ` Rik van Riel
2005-03-06 2:58 ` Tupshin Harper
2005-03-06 3:03 ` Kip Macy
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