Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752232Ab3GBFyy (ORCPT ); Tue, 2 Jul 2013 01:54:54 -0400 Received: from mout.gmx.net ([212.227.15.19]:62486 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750790Ab3GBFyx (ORCPT ); Tue, 2 Jul 2013 01:54:53 -0400 X-Authenticated: #14349625 X-Provags-ID: V01U2FsdGVkX198XwsYRoF82wT4XSUUHztqO82dvNby9zKZbiW50v 6iZXacrUeS7qzF Message-ID: <1372744486.7363.133.camel@marge.simpson.net> Subject: Re: [PATCH] sched: smart wake-affine From: Mike Galbraith To: Michael Wang Cc: LKML , Ingo Molnar , Peter Zijlstra , Alex Shi , Namhyung Kim , Paul Turner , Andrew Morton , "Nikunj A. Dadhania" , Ram Pai Date: Tue, 02 Jul 2013 07:54:46 +0200 In-Reply-To: <51D25A80.8090406@linux.vnet.ibm.com> References: <51A43B16.9080801@linux.vnet.ibm.com> <51D25A80.8090406@linux.vnet.ibm.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 804 Lines: 22 On Tue, 2013-07-02 at 12:43 +0800, Michael Wang wrote: > Since RFC: > Tested again with the latest tip 3.10.0-rc7. > > 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. How much does this still help with Alex's patches integrated? aside: were I a maintainer, I'd be a little concerned that what this helps with collides somewhat with the ongoing numa work. -Mike -- 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/