From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753571Ab3AZMFP (ORCPT ); Sat, 26 Jan 2013 07:05:15 -0500 Received: from mail-ee0-f44.google.com ([74.125.83.44]:48081 "EHLO mail-ee0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753464Ab3AZMFN (ORCPT ); Sat, 26 Jan 2013 07:05:13 -0500 Date: Sat, 26 Jan 2013 13:05:09 +0100 From: Ingo Molnar To: Mike Galbraith Cc: Rik van Riel , linux-kernel@vger.kernel.org, aquini@redhat.com, walken@google.com, eric.dumazet@gmail.com, lwoodman@redhat.com, knoel@redhat.com, chegu_vinod@hp.com, raghavendra.kt@linux.vnet.ibm.com, mingo@redhat.com Subject: Re: [PATCH -v4 0/5] x86,smp: make ticket spinlock proportional backoff w/ auto tuning Message-ID: <20130126120509.GD13445@gmail.com> References: <20130125140553.060b8ced@annuminas.surriel.com> <1359184867.5835.85.camel@marge.simpson.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1359184867.5835.85.camel@marge.simpson.net> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Mike Galbraith wrote: > On Fri, 2013-01-25 at 14:05 -0500, Rik van Riel wrote: > > > The performance issue observed with AIM7 is still a mystery. > > Hm. AIM7 mystery _may_ be the same crud I see on a 4 node 40 > core box. Stock scheduler knobs are too preempt happy, produce > unstable results. I twiddle them as below to stabilize > results. > > I'm testing a load balancing series from Alex Shi with AIM7 > and whatnot, added your series on top of it and retested. > What I see is improvement. Since we want both series that's good news, agreed? Thanks, Ingo