<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><br>> - How did you measure this performance difference? <br> Database server running on PV DomU with intensive I/O.<br> Workload connected with loading and unloading tables<br> to/from ASCII files residing on the guest's image.<br> > - Did you make sure kernel configuration is similar for both kernel types? <br> > Many pvops .configs have various debugging options enabled that kill the performance..<br><br>It's my personal impression. I am not an expert in PVOPS config tuning, but<br>try to avoid debugging options.<br><br>Boris.<br><br>--- On <b>Wed, 10/20/10, Pasi Kärkkäinen <i><pasik@iki.fi></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Pasi Kärkkäinen
<pasik@iki.fi><br>Subject: Re: [Fedora-xen] another xen build and pvops kernel<br>To: "Boris Derzhavets" <bderzhavets@yahoo.com><br>Cc: xen@lists.fedoraproject.org, xen-users@lists.xensource.com<br>Date: Wednesday, October 20, 2010, 1:42 PM<br><br><div class="plainMail">On Mon, Oct 18, 2010 at 07:49:29AM -0700, Boris Derzhavets wrote:<br>> Just wondering why [1]kernel-2.6.32.23-170.xendom0.fc12.src.rpm cannot<br>> make itself<br>> into F14. It seems pretty stable. Why it cannot be just a package<br>> available via "yum install" . Anyway Fedora's Libvirt has the best<br>> compatibility with Xen 4.0.1.<br>> It's not too late switch back to Xen with PVOPS kernel. XenLinux 2.6.34.7<br>> aka Suse<br>> is really dangerous . It outperforms pvops kernel about 15-20 % under Xen<br>> 4.0.1.<br>><br><br>-
How did you measure this performance difference? <br>- Did you make sure kernel configuration is similar for both kernel types? <br>Many pvops .configs have various debugging options enabled that kill the performance..<br><br>-- Pasi<br><br>> I don't mention KVM performance. It's not a competitor for OpenSuse 11.3<br>> after the<br>> most recent "zypper update"<br>> <br>> Boris.<br>> <br>> --- On Mon, 10/18/10, M A Young <<a ymailto="mailto:m.a.young@durham.ac.uk" href="/mc/compose?to=m.a.young@durham.ac.uk">m.a.young@durham.ac.uk</a>> wrote:<br>> <br>> From: M A Young <<a ymailto="mailto:m.a.young@durham.ac.uk" href="/mc/compose?to=m.a.young@durham.ac.uk">m.a.young@durham.ac.uk</a>><br>> Subject: Re: [Fedora-xen] another xen build<br>> To: <a
ymailto="mailto:xen@lists.fedoraproject.org" href="/mc/compose?to=xen@lists.fedoraproject.org">xen@lists.fedoraproject.org</a><br>> Date: Monday, October 18, 2010, 6:17 AM<br>> <br>> There is less urgency to test now because 4.0.1-6.fc14 has now made it<br>> into F14 in time for the release. You can of course continue to test if<br>> you want to.<br>> <br>> Michael Young<br>> --<br>> xen mailing list<br>> [2]<a ymailto="mailto:xen@lists.fedoraproject.org" href="/mc/compose?to=xen@lists.fedoraproject.org">xen@lists.fedoraproject.org</a><br>> [3]<a href="https://admin.fedoraproject.org/mailman/listinfo/xen" target="_blank">https://admin.fedoraproject.org/mailman/listinfo/xen</a><br>> <br>> References<br>> <br>>
Visible links<br>> 1. <a href="http://fedorapeople.org/%7Emyoung/dom0/src/kernel-2.6.32.23-170.xendom0.fc12.src.rpm" target="_blank">http://fedorapeople.org/%7Emyoung/dom0/src/kernel-2.6.32.23-170.xendom0.fc12.src.rpm</a><br>> 2. file:///mc/compose?to=<a ymailto="mailto:xen@lists.fedoraproject.org" href="/mc/compose?to=xen@lists.fedoraproject.org">xen@lists.fedoraproject.org</a><br>> 3. <a href="https://admin.fedoraproject.org/mailman/listinfo/xen" target="_blank">https://admin.fedoraproject.org/mailman/listinfo/xen</a><br><br>> --<br>> xen mailing list<br>> <a ymailto="mailto:xen@lists.fedoraproject.org" href="/mc/compose?to=xen@lists.fedoraproject.org">xen@lists.fedoraproject.org</a><br>> <a href="https://admin.fedoraproject.org/mailman/listinfo/xen" target="_blank">https://admin.fedoraproject.org/mailman/listinfo/xen</a><br></div></blockquote></td></tr></table><br>