From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752190AbcEAIxN (ORCPT ); Sun, 1 May 2016 04:53:13 -0400 Received: from merlin.infradead.org ([205.233.59.134]:50076 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750945AbcEAIxM (ORCPT ); Sun, 1 May 2016 04:53:12 -0400 Date: Sun, 1 May 2016 10:53:03 +0200 From: Peter Zijlstra To: Mike Galbraith Cc: Chris Mason , Ingo Molnar , Matt Fleming , linux-kernel@vger.kernel.org Subject: Re: sched: tweak select_idle_sibling to look for idle threads Message-ID: <20160501085303.GF2975@worktop.cust.blueprintrf.com> References: <20160405180822.tjtyyc3qh4leflfj@floor.thefacebook.com> <20160409190554.honue3gtian2p6vr@floor.thefacebook.com> <20160430124731.GE2975@worktop.cust.blueprintrf.com> <1462086753.9717.29.camel@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1462086753.9717.29.camel@suse.de> User-Agent: Mutt/1.5.22.1 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, May 01, 2016 at 09:12:33AM +0200, Mike Galbraith wrote: > On Sat, 2016-04-30 at 14:47 +0200, Peter Zijlstra wrote: > > Can you guys have a play with this; I think one and two node tbench are > > good, but I seem to be getting significant run to run variance on that, > > so maybe I'm not doing it right. > > Nah, tbench is just variance prone. It got dinged up at clients=cores > on my desktop box, on 4 sockets the high end got seriously dinged up. Ouch, yeah, big hurt. Lets try that again... :-)