From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933633Ab2AJByw (ORCPT ); Mon, 9 Jan 2012 20:54:52 -0500 Received: from mga11.intel.com ([192.55.52.93]:49412 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932253Ab2AJByv (ORCPT ); Mon, 9 Jan 2012 20:54:51 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="105303495" Subject: Re: [PATCH] x86,sched: Fix sched_smt_power_savings totally broken From: Suresh Siddha Reply-To: Suresh Siddha To: Vincent Guittot Cc: Peter Zijlstra , Youquan Song , linux-kernel@vger.kernel.org, mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com, akpm@linux-foundation.org, stable@vger.kernel.org, arjan@linux.intel.com, len.brown@intel.com, anhua.xu@intel.com, chaohong.guo@intel.com, Youquan Song In-Reply-To: References: <1326099367-4166-1-git-send-email-youquan.song@intel.com> <1326103578.2442.50.camel@twins> <20120110001445.GA20542@linux-youquan.bj.intel.com> <1326107563.2442.65.camel@twins> Content-Type: text/plain; charset="UTF-8" Organization: Intel Date: Mon, 09 Jan 2012 17:54:21 -0800 Message-ID: <1326160461.2366.19.camel@sbsiddha-mobl2> Mime-Version: 1.0 X-Mailer: Evolution 2.32.3 (2.32.3-1.fc14) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2012-01-09 at 15:29 +0100, Vincent Guittot wrote: > Hi Peter, > > I'm also using sched_mc level for doing powersaving load balance on > ARM platform and we have real benefits. hi Vincent, Can you elaborate on your platform topology where you see the benefits? on x86, 'sched_mc' was designed for the case of consolidating load into one socket before using another idle socket. Just wondering if this is your use case too or if you are consolidating at a different topological level. thanks, suresh