From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9E0AAC433DF for ; Sun, 31 May 2020 18:59:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 775CC2074B for ; Sun, 31 May 2020 18:59:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728200AbgEaS7d (ORCPT ); Sun, 31 May 2020 14:59:33 -0400 Received: from mga02.intel.com ([134.134.136.20]:50486 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727084AbgEaS7d (ORCPT ); Sun, 31 May 2020 14:59:33 -0400 IronPort-SDR: 9uOOC67XA79tDo/o0pxYM34LgIhTj09y/gbFkdtPIEwImiShULA0BTHH762qbloh6+4068gIF3 3hz1lQ1GlXhw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 May 2020 11:59:32 -0700 IronPort-SDR: 56iY8jhYpdvBBecgymTD6YTS5a9w3t+NCJr7GpBavGewE9vX2aQxwyFe/x65dkdZGzFOeFS7Qh bk6LDZEU0Cuw== X-IronPort-AV: E=Sophos;i="5.73,457,1583222400"; d="scan'208";a="292954603" Received: from nibndana-mobl2.ger.corp.intel.com (HELO spandruv-mobl.amr.corp.intel.com) ([10.251.11.254]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 May 2020 11:59:31 -0700 Message-ID: <4793937b5e2b8b03a1aa0943bb5f62d17496cfee.camel@linux.intel.com> Subject: Re: [RFC/RFT][PATCH] cpufreq: intel_pstate: Accept passive mode with HWP enabled From: Srinivas Pandruvada To: Doug Smythies , "'Rafael J. Wysocki'" Cc: 'LKML' , 'Len Brown' , 'Peter Zijlstra' , 'Giovanni Gherdovich' , 'Francisco Jerez' , 'Linux PM' Date: Sun, 31 May 2020 11:59:30 -0700 In-Reply-To: <000201d63776$2d56f330$8804d990$@net> References: <2931539.RsFqoHxarq@kreacher> <000001d6376a$03bbaae0$0b3300a0$@net> <000201d63776$2d56f330$8804d990$@net> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.34.4 (3.34.4-1.fc31) MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org On Sun, 2020-05-31 at 11:06 -0700, Doug Smythies wrote: > Hi Srinivas, > > Thanks you for your quick reply. > > On 2020.05.31 09:54 Srinivas Pandruvada wrote > > On Sun, 2020-05-31 at 09:39 -0700, Doug Smythies wrote: > > > Event begins at 17.456 seconds elapsed time. > > > Previous event was about 107 milliseconds ago. > > > > > > Old min ; new min ; freq GHz; load % ; duration mS > > > 27 ; 28 ; 4.60 ; 68.17 ; 10.226 > > > 28 ; 26 ; 4.53 ; 57.47 ; 10.005 > > > > Seems you hit power/thermal limit > > No. > > I am nowhere near any power limit at all. > I have meticulously configured and tested the thermal management of > this computer. > I never ever hit a thermal limit and have TDP set such that the > processor > temperature never exceeds about 75 degrees centigrade. > > There should never be throttling involved in these experiments. > I can achieve throttling when compiling the kernel and with > torture test mode on the mprime test (other CPU stressors, > including my own, are not as good at generating heat as > mprime). > > This system can run indefinitely at 99.9 watts processor package > power. > Example (turbostat, steady state, CPU freq throttled to 4.04 GHz): > > doug@s18:~$ sudo ~/turbostat --Summary --quiet --show > Busy%,Bzy_MHz,PkgTmp,PkgWatt,GFXWatt,IRQ --interval 12 > Busy% Bzy_MHz IRQ PkgTmp PkgWatt GFXWatt > 100.21 4045 72231 66 99.93 0.00 > 100.21 4043 72239 65 99.92 0.00 > > > Is this some Lenovo system? > > No. The web page version of my original e-mail has > a link to the test computer hardware profile. > > The motherboard is ASUS PRIME Z390-P. > OK, this seems a desktop system. > > If you disable HWP you don't see that? > > Correct. > > > What is the value of > > cat /sys/bus/pci/devices/0000\:00\:04.0/tcc_offset_degree_celsius > > ? "No such file or directory" > > > cat /sys/class/powercap/intel-rapl-mmio/intel-rapl- > > mmio:0/constraint_0_power_limit_uw > You may not have CONFIG_INT340X_THERMAL=y What is #rdmsr 0x1a2 Try changing energy_perf_bias and see if it helps here. Thanks, Srinivas > ? "No such file or directory" > > > You may want to run > > Try running dptfxtract once. > > No, I am not going to. > > I am not running thermald. Eventually I will, as a backup > in case of cooling failure, so as not to hit the processor limit > shutdown. I just haven't done it yet. > > > Then try to get again > > > > cat /sys/bus/pci/devices/0000\:00\:04.0/tcc_offset_degree_celsius > > cat /sys/class/powercap/intel-rapl-mmio/intel-rapl- > > mmio:0/constraint_0_power_limit_uw > > > > > > Thanks, > > Srinivas > >