From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH v4 0/8] KVM paravirt remote flush tlb Date: Mon, 03 Sep 2012 17:33:46 +0300 Message-ID: <5044BFCA.7060303@redhat.com> References: <20120821112346.3512.99814.stgit@abhimanyu.in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: mtosatti@redhat.com, raghukt@linux.vnet.ibm.com, alex.shi@intel.com, kvm@vger.kernel.org, stefano.stabellini@eu.citrix.com, peterz@infradead.org, hpa@zytor.com, vsrivatsa@gmail.com, mingo@elte.hu To: "Nikunj A. Dadhania" Return-path: Received: from mx1.redhat.com ([209.132.183.28]:30014 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932174Ab2ICOeN (ORCPT ); Mon, 3 Sep 2012 10:34:13 -0400 In-Reply-To: <20120821112346.3512.99814.stgit@abhimanyu.in.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: On 08/21/2012 02:25 PM, Nikunj A. Dadhania wrote: > > kernbench(lower is better) > ========================== > base pvflushv4 %improvement > 1VM 48.5800 46.8513 3.55846 > 2VM 108.1823 104.6410 3.27346 > 3VM 183.2733 163.3547 10.86825 > > ebizzy(higher is better) > ======================== > base pvflushv4 %improvement > 1VM 2414.5000 2089.8750 -13.44481 > 2VM 2167.6250 2371.7500 9.41699 > 3VM 1600.1111 2102.5556 31.40060 > The regression is worrying. We're improving the contended case at the cost of the non-contended case, this is usually the wrong thing to do. Do we have any clear idea of the cause of the regression? -- error compiling committee.c: too many arguments to function