From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Lezcano Subject: Re: PROBLEM: cpuidle: Quickly notice prediction failure for repeat mode Date: Thu, 19 Dec 2013 21:11:15 +0100 Message-ID: <52B352E3.1040903@linaro.org> References: <20131219195159.GB16912@holos> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail-we0-f178.google.com ([74.125.82.178]:58454 "EHLO mail-we0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756211Ab3LSULN (ORCPT ); Thu, 19 Dec 2013 15:11:13 -0500 Received: by mail-we0-f178.google.com with SMTP id u57so1610413wes.9 for ; Thu, 19 Dec 2013 12:11:13 -0800 (PST) In-Reply-To: <20131219195159.GB16912@holos> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Mark Oteiza , linux-pm@vger.kernel.org On 12/19/2013 08:51 PM, Mark Oteiza wrote: > Hi, > > Commit 1485191 causes a regression on my hardware (laptop) manifestin= g > itself as increased power consumption when playing music on mpd using > pulseaudio. > > I bisected to find 1485191. I tested the commit it reverts (69a37bea= ), > and the commit prior 69a37bea, e34a00d6. Here's a summary: > > status sha power coretemp > --------------------------------- > BAD 14851912 14W 54C > GOOD 228b3023 9W 47C > GOOD 69a37bea ~8.8W 47C > GOOD e45a00d6 ~9.3W 47C Hi Mark, thanks for the measurements. Is it possible you do some perf benchmarking. IIRC, this patch was=20 reverted because it introduced some perf regression. -- Daniel > > I thought it was strange that it happens only with that combination o= f > audio software, so I was happy to patch out that changeset which was = bad > for me. Past 3.12 (now on 3.12.5), the issue persists and I'm not su= re > I can easily merge anymore. > > I attached some info I hope will be helpful. > > Thanks, > --=20 Linaro.org =E2=94=82 Open source software fo= r ARM SoCs =46ollow Linaro: Facebook | Twitter | Blog