Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753051Ab2BUIcy (ORCPT ); Tue, 21 Feb 2012 03:32:54 -0500 Received: from e23smtp07.au.ibm.com ([202.81.31.140]:36893 "EHLO e23smtp07.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752299Ab2BUIcx (ORCPT ); Tue, 21 Feb 2012 03:32:53 -0500 Date: Tue, 21 Feb 2012 14:02:41 +0530 From: Srivatsa Vaddagiri To: Mike Galbraith Cc: Peter Zijlstra , Suresh Siddha , linux-kernel , Ingo Molnar , Paul Turner Subject: Re: sched: Avoid SMT siblings in select_idle_sibling() if possible Message-ID: <20120221083241.GC5156@linux.vnet.ibm.com> Reply-To: Srivatsa Vaddagiri References: <1321495153.5100.7.camel@marge.simson.net> <1321544313.6308.25.camel@marge.simson.net> <1321545376.2495.1.camel@laptop> <1321547917.6308.48.camel@marge.simson.net> <1321551381.15339.21.camel@sbsiddha-desk.sc.intel.com> <1321629267.7080.13.camel@marge.simson.net> <1329748861.2293.345.camel@twins> <1329761661.6276.146.camel@marge.simpson.net> <1329764866.2293.376.camel@twins> <1329802998.7333.1.camel@marge.simpson.net> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <1329802998.7333.1.camel@marge.simpson.net> User-Agent: Mutt/1.5.21 (2010-09-15) x-cbid: 12022022-0260-0000-0000-0000009248EA Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 903 Lines: 24 * Mike Galbraith [2012-02-21 06:43:18]: > On Mon, 2012-02-20 at 20:07 +0100, Peter Zijlstra wrote: > > On Mon, 2012-02-20 at 19:14 +0100, Mike Galbraith wrote: > > > Enabling SD_BALANCE_WAKE used to be decidedly too expensive to consider. > > > Maybe that has changed, but I doubt it. > > > > Right, I through I remembered some such, you could see it on wakeup > > heavy things like pipe-bench and that java msg passing thing, right? > > Yeah, it beat up switch heavy buddies pretty bad. Do you have pointer to the java benchmark? Also is pipe-bench the same as the one described below? http://freecode.com/projects/pipebench - vatsa -- 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/