From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: Re: [intel-pstate driver regression] processor frequency very high even if in idle Date: Thu, 31 Mar 2016 00:25:59 +0200 Message-ID: <56FC5277.9050906@intel.com> References: <1459376311.13525.108.camel@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mga01.intel.com ([192.55.52.88]:32056 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752883AbcC3W0E (ORCPT ); Wed, 30 Mar 2016 18:26:04 -0400 In-Reply-To: <1459376311.13525.108.camel@linux.intel.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Srinivas Pandruvada Cc: sedat.dilek@gmail.com, Doug Smythies , =?UTF-8?Q?J=c3=b6rg_Otte?= , Linux PM List , LKML , "Rafael J. Wysocki" 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? So there seems to be a problem here AFAICS.