From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jes Sorensen Subject: Re: slow guest performance with build load, looking for ideas Date: Thu, 16 Jul 2009 14:20:17 +0200 Message-ID: <4A5F1B01.1010803@sgi.com> References: <20090618230744.GA19307@sgi.com> <4A477B8C.2010502@redhat.com> <20090628190500.GA7347@sgi.com> <4A47E06A.7040700@redhat.com> <20090701214128.GA1380@sgi.com> <4A4C4A28.1060105@redhat.com> <4A4C80AD.7010204@redhat.com> <1246635797.13604.7.camel@blaa> <20090709023633.GB29409@sgi.com> <4A55A0E1.1060501@redhat.com> <20090709180110.GB14935@sgi.com> <4A59A0FA.4010408@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Erik Jacobson , Mark McLoughlin , kvm@vger.kernel.org To: Avi Kivity Return-path: Received: from relay1.sgi.com ([192.48.179.29]:56259 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751725AbZGPMUT (ORCPT ); Thu, 16 Jul 2009 08:20:19 -0400 In-Reply-To: <4A59A0FA.4010408@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On 07/12/2009 10:38 AM, Avi Kivity wrote: > On 07/09/2009 09:01 PM, Erik Jacobson wrote: >> Test runs after make clean... >> time (make -j12&& make -j12 modules) >> >> real 10m25.585s >> user 26m36.450s >> sys 8m14.776s >> >> 2nd trial (make clean followed by the same test again. >> real 9m21.626s >> user 26m42.144s >> sys 8m14.532s > > That's a scaling of 3.7, still pretty far from the host and even farther > than my results. > > Is the numa factor of this machine larger than usual? I didn't see a reply to this one, so I will just add what I know. I believe Erik ran the tests on what we sell as an XE270 system. It's really just a standard Intel or Supermicro motherboard in a box that has been painted purple (or blue/green now I guess), so it really shouldn't have extra numa factors compared to other Nehalem systems. Cheers, Jes