From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tupshin Harper Subject: Re: horrible nfs server performance on domU Date: Sat, 05 Mar 2005 14:17:49 -0800 Message-ID: <422A300D.4080705@tupshin.com> References: <42291031.4050805@tupshin.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit In-Reply-To: Sender: xen-devel-admin@lists.sourceforge.net Errors-To: xen-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Rik van Riel Cc: xen-devel@lists.sourceforge.net List-Id: xen-devel@lists.xenproject.org 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 ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click