Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751450Ab3FCD0d (ORCPT ); Sun, 2 Jun 2013 23:26:33 -0400 Received: from e23smtp06.au.ibm.com ([202.81.31.148]:33222 "EHLO e23smtp06.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750808Ab3FCD00 (ORCPT ); Sun, 2 Jun 2013 23:26:26 -0400 Message-ID: <51AC0CD4.9070302@linux.vnet.ibm.com> Date: Mon, 03 Jun 2013 11:26:12 +0800 From: Michael Wang User-Agent: Mozilla/5.0 (X11; Linux i686; rv:16.0) Gecko/20121011 Thunderbird/16.0.1 MIME-Version: 1.0 To: Mike Galbraith CC: LKML , Ingo Molnar , Peter Zijlstra , Alex Shi , Namhyung Kim , Paul Turner , Andrew Morton , "Nikunj A. Dadhania" , Ram Pai Subject: Re: [RFC PATCH] sched: smart wake-affine References: <51A43B16.9080801@linux.vnet.ibm.com> <51ABFF6A.60206@linux.vnet.ibm.com> <1370228941.5988.66.camel@marge.simpson.net> In-Reply-To: <1370228941.5988.66.camel@marge.simpson.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13060303-7014-0000-0000-0000031B89A7 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1479 Lines: 43 On 06/03/2013 11:09 AM, Mike Galbraith wrote: > On Mon, 2013-06-03 at 10:28 +0800, Michael Wang wrote: >> On 05/28/2013 01:05 PM, Michael Wang wrote: >>> wake-affine stuff is always trying to pull wakee close to waker, by theory, >>> this will bring benefit if waker's cpu cached hot data for wakee, or the >>> extreme ping-pong case. >>> >>> And testing show it could benefit hackbench 15% at most. >>> >>> However, the whole stuff is somewhat blindly and time-consuming, some >>> workload therefore suffer. >>> >>> And testing show it could damage pgbench 50% at most. >>> >>> Thus, wake-affine stuff should be smarter, and realise when to stop >>> it's thankless effort. >> >> Is there any comments? > > (I haven't had time to test-drive yet, -rt munches time like popcorn) I see ;-) During my testing, this one works well on the box, solved the issues of pgbench and won't harm hackbench any, I think we have caught some good point here :) Regards, Michael Wang > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/