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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AAA3EC433EF for ; Thu, 28 Oct 2021 17:10:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 897A060296 for ; Thu, 28 Oct 2021 17:10:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230230AbhJ1RNR (ORCPT ); Thu, 28 Oct 2021 13:13:17 -0400 Received: from mail2-relais-roc.national.inria.fr ([192.134.164.83]:54729 "EHLO mail2-relais-roc.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230223AbhJ1RNR (ORCPT ); Thu, 28 Oct 2021 13:13:17 -0400 IronPort-Data: =?us-ascii?q?A9a23=3AGJpiAK0+5EntTj2VtfbD5WBzkn2cJEfYwER7XOP?= =?us-ascii?q?LsXnJgWgm02YDmGUfDG+Gb/yPMTened1/aoq29x5TuZHUy4U2QQE+nZ1PZyIT+?= =?us-ascii?q?JCdXbx1DW+pYnjMdpWbJK5fAnR3huDodKjYdVeB4EfyWlTdhSMkj/jRHuCsULS?= =?us-ascii?q?s1h1ZHmeIdg9w0HqPpMZp2uaEsfDha++8kYuaT//3YDdJ6BYoWo4g0J9vnTs01?= =?us-ascii?q?BjEVJz0iXRlDRxDlAe2e3D4l/vzL4npR5fzatE88uJX24/+IL+FEmPxp3/BC/u?= =?us-ascii?q?lm7rhc0AMKlLQFVjTzCQGHfH4214b+XdaPqUTbZLwbW9VljGIlpZ1wcpEsZiYS?= =?us-ascii?q?AEzP6SKlv51vxxwSnkkZ/IZp9crJlD666R/1Xbuf2Dp0uluDUwtFZEV/vtsR2d?= =?us-ascii?q?D6ZQwMyoMaBGdjvnw2Lu9RvNxmM0vJeHvPYUCqjdhyy3UCbAtRpWra6HH49Vw3?= =?us-ascii?q?zoqgM1KW/HEaKIxczhwRA7CfAxUPVwUCdQ4kfvArmf+aTBDqBSWuK8++UDXzQp?= =?us-ascii?q?4yr+rN8DaEvSORMNIjgOAo0rY8GnjRBIXLtqSzXyC6H3EruvOmz7rHYEfDru18?= =?us-ascii?q?tZ0j1CJgG8eEhsbUR28u/bRt6IUc7qzMGRNpXFo9PJrshL7CImgGQe1vjifsAR?= =?us-ascii?q?aXddMe9DWITqlksL8izt1zEBdJtKZVOEbiQ=3D=3D?= IronPort-HdrOrdr: =?us-ascii?q?A9a23=3Aue7oYatwqwOcuG9rDm9G7+hw7skDYdV00zEX?= =?us-ascii?q?/kB9WHVpm6uj5qWTdZUgpH3JYVMqKRUdcL+7VJVoLUmyyXcN2+ks1NSZLWrbUQ?= =?us-ascii?q?mTTb2KhLGKq1bd8kvFmNK1vp0MT0ERMrfNMWQ=3D?= X-IronPort-AV: E=Sophos;i="5.87,190,1631570400"; d="scan'208";a="1022777" Received: from 173.121.68.85.rev.sfr.net (HELO hadrien) ([85.68.121.173]) by mail2-relais-roc.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 28 Oct 2021 19:10:48 +0200 Date: Thu, 28 Oct 2021 19:10:48 +0200 (CEST) From: Julia Lawall X-X-Sender: jll@hadrien To: Doug Smythies cc: Srinivas Pandruvada , Len Brown , "Rafael J. Wysocki" , Viresh Kumar , Linux PM list , Linux Kernel Mailing List Subject: Re: problem in changing from active to passive mode In-Reply-To: Message-ID: References: User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org > Now, for your graph 3, are you saying this pseudo > code of the process is repeatable?: > > Power up the system, booting kernel 5.9 > switch to passive/schedutil. > wait X minutes for system to settle > do benchmark, result ~13 seconds > re-boot to kernel 5.15-RC > switch to passive/schedutil. > wait X minutes for system to settle > do benchmark, result ~40 seconds > re-boot to kernel 5.9 > switch to passive/schedutil. > wait X minutes for system to settle > do benchmark, result ~28 seconds In the first boot of 5.9, the des (desired?) field of the HWP_REQUEST register is 0 and in the second boot (after booting 5.15 and entering passive mode) it is 10. I don't know though if this is a bug or a feature... julia