From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Doug Smythies" Subject: RE: [intel-pstate driver regression] processor frequency very high even if in idle Date: Thu, 31 Mar 2016 07:39:30 -0700 Message-ID: <002701d18b5b$22ea72d0$68bf5870$@net> References: <4187911.uaFVupaTVL@vostro.rjw.lan> <1459352017.13525.45.camel@intel.com> <002401d18ab5$0bf84a30$23e8de90$@net> <1459364336.13525.69.camel@linux.intel.com> <1459369587.13525.75.camel@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from cmta7.telus.net ([209.171.16.80]:47056 "EHLO cmta7.telus.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752768AbcCaOjg convert rfc822-to-8bit (ORCPT ); Thu, 31 Mar 2016 10:39:36 -0400 In-Reply-To: Content-Language: en-ca Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: =?utf-8?Q?'J=C3=B6rg_Otte'?= , 'Srinivas Pandruvada' Cc: "'Rafael J. Wysocki'" , 'Linux Kernel Mailing List' , linux-pm@vger.kernel.org, "'Rafael J. Wysocki'" On 2016.03.31 02:24 J=C3=B6rg Otte wrote: > jojo@fichte:/sys/devices/system/cpu/cpufreq/policy0$ cat scaling_gove= rnor > powersave >=20 > turbostat -i 1 --msr=3D0x199 > CPUID(7): No-SGX > CPU Avg_MHz Busy% Bzy_MHz TSC_MHz MSR 0x199 > - 45 1.74 2590 2496 0x00000000 > 0 45 1.76 2565 2498 0x00000a00 > 1 72 2.84 2548 2496 0x00000800 > 2 30 1.11 2661 2496 0x00001a00 > 3 33 1.23 2661 2495 0x00001a00 > CPU Avg_MHz Busy% Bzy_MHz TSC_MHz MSR 0x199 > - 9 0.35 2525 2495 0x00000000 > 0 1 0.04 2735 2495 0x00000800 > 1 1 0.05 2501 2495 0x00000800 > 2 17 0.65 2540 2495 0x00001a00 > 3 16 0.64 2501 2495 0x00001a00 > CPU Avg_MHz Busy% Bzy_MHz TSC_MHz MSR 0x199 > - 11 0.43 2523 2495 0x00000000 > 0 3 0.11 2631 2495 0x00000c00 > 1 7 0.27 2524 2495 0x00000800 > 2 18 0.72 2527 2495 0x00001a00 > 3 15 0.61 2501 2495 0x00001a00 Very Interesting. I would still like to get a trace sample to post process. Copied from a previous e-mail: On an otherwise idle system, do: # perf record -a --event=3Dpower:pstate_sample sleep 300 If pressed for time, your sleep time can be less than 5 minutes, but try to get at least 100 seconds. The resulting perf.data file will be too big to include as an on-list attachment, but send it (or them) to me off-list for post processing, and I'll report back. =2E.. Doug