Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753699AbcDARoW (ORCPT ); Fri, 1 Apr 2016 13:44:22 -0400 Received: from mga09.intel.com ([134.134.136.24]:12679 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751775AbcDARoU (ORCPT ); Fri, 1 Apr 2016 13:44:20 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,428,1455004800"; d="scan'208";a="776329998" Message-ID: <1459532674.13525.136.camel@linux.intel.com> Subject: Re: [intel-pstate driver regression] processor frequency very high even if in idle From: Srinivas Pandruvada To: =?ISO-8859-1?Q?J=F6rg?= Otte , "Rafael J. Wysocki" Cc: "Rafael J. Wysocki" , Linux Kernel Mailing List , Linux PM list , Doug Smythies Date: Fri, 01 Apr 2016 10:44:34 -0700 In-Reply-To: References: <2727017.UmaUvtBLeX@vostro.rjw.lan> <3623107.tlAuqH4F7s@vostro.rjw.lan> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.18.5.1 (3.18.5.1-1.fc23) Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 938 Lines: 31 On Fri, 2016-04-01 at 16:06 +0200, Jörg Otte wrote: > 2016-04-01 14:40 GMT+02:00 Rafael J. Wysocki : > > > > On Friday, April 01, 2016 11:20:42 AM Jörg Otte wrote: > > > > > > 2016-03-31 17:43 GMT+02:00 Rafael J. Wysocki : > > > > > > > > On Thursday, March 31, 2016 05:25:18 PM Jörg Otte wrote: > > > > > > > > > > 2016-03-31 13:42 GMT+02:00 Rafael J. Wysocki > > > > et>: > > > > > > > > > > > > On Thursday, March 31, 2016 11:05:56 AM Jörg Otte wrote: > > > > > > [Cut] > > > > > > > Done. Attached the tracer. > For me it looks like the previous one of the failing case. > The traces show that idle task is constantly running without sleep. The driver is processing samples for idle task for every 10ms and aperf/mperf are showing that we are always in turbo mode for idle task. Need to find out why idle task is not sleeping. Thanks, Srinivas > Thanks, Jörg