Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755911AbYCMRoj (ORCPT ); Thu, 13 Mar 2008 13:44:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753187AbYCMRoc (ORCPT ); Thu, 13 Mar 2008 13:44:32 -0400 Received: from gateway.drzeus.cx ([85.8.24.16]:52303 "EHLO smtp.drzeus.cx" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753086AbYCMRob (ORCPT ); Thu, 13 Mar 2008 13:44:31 -0400 Date: Thu, 13 Mar 2008 18:44:12 +0100 From: Pierre Ossman To: "Pallipadi, Venkatesh" Cc: "Len Brown" , linux-pm@lists.linux-foundation.org, "Pavel Machek" , "LKML" , "Adam Belay" , "Andi Kleen" , "Lee Revell" Subject: Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors Message-ID: <20080313184412.34d09870@mjolnir.drzeus.cx> In-Reply-To: <924EFEDD5F540B4284297C4DC59F3DEEB33CDD@orsmsx423.amr.corp.intel.com> References: <20080310100008.GA9520@elf.ucw.cz> <20080310134915.45ae7446@mjolnir.drzeus.cx> <200803121511.17389.lenb@kernel.org> <20080313173437.5f00f70e@mjolnir.drzeus.cx> <924EFEDD5F540B4284297C4DC59F3DEEB33CDD@orsmsx423.amr.corp.intel.com> X-Mailer: Claws Mail 3.3.1 (GTK+ 2.12.8; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1056 Lines: 25 On Thu, 13 Mar 2008 09:47:30 -0700 "Pallipadi, Venkatesh" wrote: > > Can you try using /dev/cpu_dma_latency from an user space application. > Refer Documentation/pm_qos_interface.txt for usage. With this interface > you can change menu governor behavior from userspace, by dynamically > allowing it to use C3 or not. I am thinking that something like allowing > C3 for few seconds and blocking it for few seconds may help. > I don't quite follow. Is the theory that you get a window of a few seconds where the system stops making a noise, even as it toggles C3? Rgds -- -- Pierre Ossman Linux kernel, MMC maintainer http://www.kernel.org PulseAudio, core developer http://pulseaudio.org rdesktop, core developer http://www.rdesktop.org -- 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/