Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752005AbcCMQDJ (ORCPT ); Sun, 13 Mar 2016 12:03:09 -0400 Received: from er-systems.de ([148.251.68.21]:54169 "EHLO er-systems.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751283AbcCMQC7 (ORCPT ); Sun, 13 Mar 2016 12:02:59 -0400 X-Greylist: delayed 480 seconds by postgrey-1.27 at vger.kernel.org; Sun, 13 Mar 2016 12:02:59 EDT Date: Sun, 13 Mar 2016 16:54:55 +0100 (CET) From: Thomas Voegtle X-X-Sender: thomas@er-systems.de To: "Longepe, Philippe" cc: "linux-kernel@vger.kernel.org" , "Gasparini, Stephane" , "Wysocki, Rafael J" Subject: RE: Performance drop on Baytrail with 4.5-rc2 In-Reply-To: <8B729BF8A98FF048A53185F813A469D935B1A189@HASMSX105.ger.corp.intel.com> Message-ID: References: <8B729BF8A98FF048A53185F813A469D935B19D03@HASMSX105.ger.corp.intel.com>, <8B729BF8A98FF048A53185F813A469D935B1A189@HASMSX105.ger.corp.intel.com> User-Agent: Alpine 2.11 (LSU 23 2013-08-11) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed X-Virus-Checker-Version: clamassassin 1.2.4 with clamdscan / ClamAV 0.99/21464/Fri Mar 11 18:31:38 2016 signatures 55. Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 661 Lines: 26 On Wed, 3 Feb 2016, Longepe, Philippe wrote: > Hi Thomas, > > Thank you for sharing this test. I just did a quick test and yes this is > really interesting ! > > Without the scale option, the load is close to 100% for each cpus (so > the pstates are increasing up to the turbo frequency) but with > scale=320:208, the load is oscillating (close to 50% in average), so the > requested frequencies are lower (the power is also reduced). > > I have a patch (not yet submitted) that reduce the gap for such a use > case. Hi, may I ask you where this patch stays? I have seen nothing in Linus' tree, that fixes that performance drop? Thanks, Thomas