From patchwork Fri Jun 20 14:28:00 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: dirk.brandewie@gmail.com X-Patchwork-Id: 4389791 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 1D285BEEAA for ; Fri, 20 Jun 2014 14:28:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 40B12203C4 for ; Fri, 20 Jun 2014 14:28:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E6C0D203DF for ; Fri, 20 Jun 2014 14:28:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752846AbaFTO2Q (ORCPT ); Fri, 20 Jun 2014 10:28:16 -0400 Received: from mail-pa0-f44.google.com ([209.85.220.44]:49238 "EHLO mail-pa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752834AbaFTO2P (ORCPT ); Fri, 20 Jun 2014 10:28:15 -0400 Received: by mail-pa0-f44.google.com with SMTP id rd3so3177765pab.17 for ; Fri, 20 Jun 2014 07:28:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=rsR1AnYOOFONegcKUuZzrIkP/Fwwpd8RySrcXDcatYE=; b=H8hEI3Sg3lQRMr4ADxJtNpRGhyOTkP+gFC3du64xhLqVHicLrvtD06Wz7Vv0AowO52 JpoocTnE8lUQvSMqev+LIh83DoFZxvYqrWqv0815LcZATxquRCPfNw8py9uTm3o0ABIy PhXPM7UO278Ov67fqu63akRwHfrgtd22iXkHcn68ZqbTvdfo/jJlMcgRVoysP8XNPoIV FZ4uVsHsjcx77zgA6A8t22vG5eozHRabvcvyxAp8eC/GwSjlWRFN7ETD28w4muvZcbFm PFDieDk7detiTEqFyXncStI0i81Ezun+IyWnPnI1EOqPXKLoFaUiyxmw6Z7iOWLs0166 NLoA== X-Received: by 10.68.193.100 with SMTP id hn4mr5166204pbc.50.1403274495186; Fri, 20 Jun 2014 07:28:15 -0700 (PDT) Received: from echolake.localdomain (static-50-43-41-81.bvtn.or.frontiernet.net. [50.43.41.81]) by mx.google.com with ESMTPSA id vx10sm44287848pac.17.2014.06.20.07.28.13 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 20 Jun 2014 07:28:13 -0700 (PDT) From: dirk.brandewie@gmail.com X-Google-Original-From: dirk.j.brandewie@intel.com To: linux-pm@vger.kernel.org Cc: rjw@rjwysocki.net, dirk.brandewie@gmail.com, stable@vger.kernel.org, Dirk Brandewie Subject: [PATCH 3/3] intel_pstate: Update documentation of {max, min}_perf_pct sysfs files Date: Fri, 20 Jun 2014 07:28:00 -0700 Message-Id: <1403274480-10593-4-git-send-email-dirk.j.brandewie@intel.com> X-Mailer: git-send-email 1.9.0 In-Reply-To: <1403274480-10593-1-git-send-email-dirk.j.brandewie@intel.com> References: <1403274480-10593-1-git-send-email-dirk.j.brandewie@intel.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, T_DKIM_INVALID, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Dirk Brandewie Update documentation to make the interpretation of the values clearer References: https://bugzilla.kernel.org/show_bug.cgi?id=64251 Cc: Stable [3.13+] Signed-off-by: Dirk Brandewie --- Documentation/cpu-freq/intel-pstate.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/Documentation/cpu-freq/intel-pstate.txt b/Documentation/cpu-freq/intel-pstate.txt index e742d21..a69ffe1 100644 --- a/Documentation/cpu-freq/intel-pstate.txt +++ b/Documentation/cpu-freq/intel-pstate.txt @@ -15,10 +15,13 @@ New sysfs files for controlling P state selection have been added to /sys/devices/system/cpu/intel_pstate/ max_perf_pct: limits the maximum P state that will be requested by - the driver stated as a percentage of the available performance. + the driver stated as a percentage of the available performance. The + available (P states) performance may be reduced by the no_turbo + setting described below. min_perf_pct: limits the minimum P state that will be requested by - the driver stated as a percentage of the available performance. + the driver stated as a percentage of the max (non-turbo) + performance level. no_turbo: limits the driver to selecting P states below the turbo frequency range.