From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tommi Virtanen Subject: Re: Serious performance issues Date: Fri, 04 Mar 2005 20:55:02 +0200 Message-ID: <4228AF06.1010204@tv.debian.net> References: <42278833.6050500@tv.debian.net> <4228842D.30505@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit In-Reply-To: <4228842D.30505@us.ibm.com> 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: Anthony Liguori Cc: xen-devel@lists.sourceforge.net List-Id: xen-devel@lists.xenproject.org Anthony Liguori wrote: >> I tested the disk, it still transfers ~50MB/s. I don't seem to be >> suffering from PIO mode. Also, things running from RAM cache are as >> slow as from disk. > What version of Xen is this? 2.0.4, as packaged for Debian by Adam Heath at http://people.debian.org/~doogie/ > If you're running xen-unstable, try xen-2.0.x or vice versa. Are you > absolutely positive that you've got enough memory allocated to dom0? As dom0 is my main environment, it gets almost all of the RAM. title Xen 2.6.10 root (hd0,1) kernel /boot/xen.gz dom0_mem=917504 module /boot/xen-linux-2.6.10+xen0 root=/dev/hda2 ro module /boot/initrd.img-2.6.10+xen0 savedefault boot > That you've got the proper IO chipset support built into the kernel? The config is pretty much identical between native linux and xen dom0. > That you've really got tls disabled (if you just move tls after an app > has already launched using it it will still be using it until you > restart the app)? I have rebooted many times since the move. > These numbers seem too bad to be Xen's fault alone. Do you have swap > enabled? Is there a great deal of swap activity? There's 2 gigs of swap with under 3 megabytes used, no blocks going in or out. ------------------------------------------------------- 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