From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756281AbaHAVbH (ORCPT ); Fri, 1 Aug 2014 17:31:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38342 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754982AbaHAVbG (ORCPT ); Fri, 1 Aug 2014 17:31:06 -0400 Message-ID: <53DC06FA.8030104@redhat.com> Date: Fri, 01 Aug 2014 23:30:34 +0200 From: Jirka Hladky User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: Davidlohr Bueso CC: Peter Zijlstra , Rik van Riel , Aaron Lu , LKML , lkp@01.org Subject: Re: [LKP] [sched/numa] a43455a1d57: +94.1% proc-vmstat.numa_hint_faults_local References: <53d70ee6.JsUEmW5dWsv8dev+%fengguang.wu@intel.com> <53D72FF5.90908@intel.com> <20140729023940.37b6aebc@annuminas.surriel.com> <20140731104241.GA9918@twins.programming.kicks-ass.net> <20140731155723.GY3588@twins.programming.kicks-ass.net> <53DA6BDA.8080000@redhat.com> <1406926000.16021.6.camel@buesod1.americas.hpqcorp.net> In-Reply-To: <1406926000.16021.6.camel@buesod1.americas.hpqcorp.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/01/2014 10:46 PM, Davidlohr Bueso wrote: > On Thu, 2014-07-31 at 18:16 +0200, Jirka Hladky wrote: >> Peter, I'm seeing regressions for >> >> SINGLE SPECjbb instance for number of warehouses being the same as total >> number of cores in the box. >> >> Example: 4 NUMA node box, each CPU has 6 cores => biggest regression is >> for 24 warehouses. > By looking at your graph, that's around a 10% difference. > > So I'm not seeing anywhere near as bad a regression on a 80-core box. > Testing single with 80 warehouses, I get: > > tip/master baseline: > 677476.36 bops > 705826.70 bops > 704870.87 bops > 681741.20 bops > 707014.59 bops > > Avg: 695385.94 bops > > tip/master + patch (NUMA_SCALE/8 variant): > 698242.66 bops > 693873.18 bops > 707852.28 bops > 691785.96 bops > 747206.03 bopsthis > > Avg: 707792.022 bops > > So both these are pretty similar, however, when reverting, on avg we > increase the amount of bops a mere ~4%: > > tip/master + reverted: > 778416.02 bops > 702602.62 bops > 712557.32 bops > 713982.90 bops > 783300.36 bops > > Avg: 738171.84 bops > > Are there perhaps any special specjbb options you are using? > I see the regression only on this box. It has 4 "Ivy Bridge-EX" Xeon E7-4890 v2 CPUs. http://ark.intel.com/products/75251 http://en.wikipedia.org/wiki/List_of_Intel_Xeon_microprocessors#.22Ivy_Bridge-EX.22_.2822_nm.29_Expandable_2 Please rerun the test on box with Ivy Bridge CPUs. It seems that older CPU generations are not affected. Thanks Jirka