Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753599AbcC3XRO (ORCPT ); Wed, 30 Mar 2016 19:17:14 -0400 Received: from mga04.intel.com ([192.55.52.120]:13287 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751827AbcC3XRM (ORCPT ); Wed, 30 Mar 2016 19:17:12 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,419,1455004800"; d="scan'208";a="76206314" From: "Pandruvada, Srinivas" To: "Wysocki, Rafael J" CC: "dsmythies@telus.net" , "linux-kernel@vger.kernel.org" , "jrg.otte@gmail.com" , "linux-pm@vger.kernel.org" , "sedat.dilek@gmail.com" , "rafael@kernel.org" Subject: Re: [intel-pstate driver regression] processor frequency very high even if in idle Thread-Topic: [intel-pstate driver regression] processor frequency very high even if in idle Thread-Index: AQHRitpJ0CSsQ2aGv0eqAwU+z7M6pg== Date: Wed, 30 Mar 2016 23:17:10 +0000 Message-ID: <1459379847.13525.129.camel@intel.com> References: <1459376311.13525.108.camel@linux.intel.com> <56FC5277.9050906@intel.com> <1459378003.13525.117.camel@linux.intel.com> In-Reply-To: <1459378003.13525.117.camel@linux.intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.7.199.80] Content-Type: text/plain; charset="utf-8" Content-ID: <90D1CD930BF89D4EB212991A220663B8@intel.com> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id u2UNHIsL026349 Content-Length: 2407 Lines: 72 On Wed, 2016-03-30 at 15:46 -0700, Srinivas Pandruvada wrote: > On Thu, 2016-03-31 at 00:25 +0200, Rafael J. Wysocki wrote: > > > > On 3/31/2016 12:18 AM, Srinivas Pandruvada wrote: > > > > > > > > > On Wed, 2016-03-30 at 23:41 +0200, Sedat Dilek wrote: > > > > > > > > > > > > Hi, > > > > > > > > I am using Intel-PState-Driver here with v4.6-rc1 and Intel- > > > > SandyBridge-CPU. > > > > > > > > Here are my turbostat results attached. > > > > > > > > $ cd $BUILD_DIR > > > > $ LC_ALL=C make -C tools/ turbostat > > > > > > > > $ sudo ./turbostat -i 1 --msr=0x199 --debug --out > > > > /tmp/turbostat-i-1-msr-0x199-debug.txt > > > > > > > > Will try . > > > > > > > > Please see attached files. > > > > > > > Thanks. Your logs make sense. You have config set to performance > > > mode > > > by default (Which I believe default in all kernel Ubuntu). So as > > > expected Intel P state was asking for max. So there is no issue > > > here. > > But the behavior is different from what it used to be, isn't it? > > > There are two turbostat output files, In both I see we are requesting > max (0x1700) in performance mode. This CPU is Sandybridge, so no > config > TDP here, the other problem system reported is Haswell > . >  0       1       3    0.15    2017    1596  0x00001700  > > I am not sure whether Sedat is saying that he has the same issue as > Jorg. I think Sedat will see the same turbostat output if he ran 4.5. > I takeback my statements. It will depend on when he ran turbostat, is it within a minute or so. As doug suggested, ubuntu changes the mode to powersave, then we shouldn't see 0x1700 in MSR 0x199. Sedat, What is the output of  cat /sys/devices/system/cpu/cpu?/cpufreq/scaling_governor  Thanks, Srinivas > Sedat,  > Please confirm whether you see difference between 4.5 and 4.6-rc1. > > Thanks, > Srinivas > > > > > So there seems to be a problem here AFAICS. > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-pm" > > in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at  http://vger.kernel.org/majordomo-info.html > -- > To unsubscribe from this list: send the line "unsubscribe linux-pm" > in > the body of a message to majordomo@vger.kernel.org > More majordomo info at  http://vger.kernel.org/majordomo-info.html