From mboxrd@z Thu Jan 1 00:00:00 1970 From: Martin Wawro Subject: Re: [User Question] Repeated severe performance problems on guest Date: Fri, 19 Apr 2013 08:51:38 +0200 Message-ID: <5170E97A.1060705@googlemail.com> References: <5168227B.1050402@googlemail.com> <20130416054916.GA5286@stefanha-thinkpad.redhat.com> <516D0280.4090408@googlemail.com> <20130417135311.GA8954@stefanha-thinkpad.muc.redhat.com> <5C6B7C93-7905-4B5E-93BA-D0C80DA3EE84@googlemail.com> <20130418072551.GA19195@stefanha-thinkpad.redhat.com> <516FC454.6060902@googlemail.com> <516FF4D1.2050502@googlemail.com> <20130419055917.GA27846@stefanha-thinkpad.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: kvm , Marcelo Tosatti , Gleb Natapov , Paolo Bonzini To: Stefan Hajnoczi Return-path: Received: from mail-ee0-f49.google.com ([74.125.83.49]:39338 "EHLO mail-ee0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756503Ab3DSGvl (ORCPT ); Fri, 19 Apr 2013 02:51:41 -0400 Received: by mail-ee0-f49.google.com with SMTP id b47so613127eek.8 for ; Thu, 18 Apr 2013 23:51:40 -0700 (PDT) In-Reply-To: <20130419055917.GA27846@stefanha-thinkpad.redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On 04/19/2013 07:59 AM, Stefan Hajnoczi wrote: Hi Stefan, > BTW does the host CPU support Intel Extended Page Tables or AMD Nested > Page Tables? grep 'npt\|ept' /proc/cpuinfo > > (I think the kvm_stat is saying EPT/NPT are not in use) Host CPU has EPT. > That is virt-manager.py, exactly doing that. > Okay, I was wondering if something is causing libvirt and maybe QEMU to > act strangely. If its just virt-manager then it's probably not the > issue. We upgraded to RHEL 6.4 yesterday. Now running kernel 2.6.32-358 and qemu-kvm 0.12.1.2-2.355 . Maybe this does improve something... Best regards, Martin