From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753924AbcEWJZI (ORCPT ); Mon, 23 May 2016 05:25:08 -0400 Received: from merlin.infradead.org ([205.233.59.134]:41717 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751789AbcEWJZG (ORCPT ); Mon, 23 May 2016 05:25:06 -0400 Date: Mon, 23 May 2016 11:24:51 +0200 From: Peter Zijlstra To: Lorenzo Pieralisi Cc: Steve Muckle , Daniel Lezcano , Shilpasri G Bhat , "Rafael J. Wysocki" , Viresh Kumar , "linux-pm@vger.kernel.org" , Linux Kernel Mailing List , "Gautham R. Shenoy" , shreyas@linux.vnet.ibm.com, akshay.adiga@linux.vnet.ibm.com, linuxppc-dev@ozlabs.org Subject: Re: [RFC PATCH] Increase in idle power with schedutil Message-ID: <20160523092451.GF15728@worktop.ger.corp.intel.com> References: <1463576020-18597-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> <20160519114029.GW3193@twins.programming.kicks-ass.net> <201605201223.u4KCNWn9028105@mx0a-001b2d01.pphosted.com> <20160522103912.GN3193@twins.programming.kicks-ass.net> <20160522204252.GH15383@graphite.smuckle.net> <20160523090004.GA21186@red-moon> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160523090004.GA21186@red-moon> 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 Mon, May 23, 2016 at 10:00:04AM +0100, Lorenzo Pieralisi wrote: > It is also related to static leakage power that depends on the operating > voltage (ie higher operating frequencies require higher voltage) so in a > way scaling frequency before going idle may not be effective if voltage > does not scale too in turn. Sure, but the platform drivers 'know' all this and can make the right decision.