From patchwork Tue May 26 15:16:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Gaignard X-Patchwork-Id: 211959 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=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 21AF5C433DF for ; Tue, 26 May 2020 15:17:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0169620776 for ; Tue, 26 May 2020 15:17:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="ZJ2hInnn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727921AbgEZPRa (ORCPT ); Tue, 26 May 2020 11:17:30 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:25764 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728637AbgEZPRS (ORCPT ); Tue, 26 May 2020 11:17:18 -0400 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 04QFBxuh017911; Tue, 26 May 2020 17:16:28 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=5Rg4znNj42bzqjnolZJ9lV8rYKa4nFxeh6irBMvctcs=; b=ZJ2hInnnSvYQ638CgiFTDp+jSj5/oidFxGSA9sSM2XMhqc62QR9HNVaLncNLEIXTlN5p ER9JTb3KxLPPCnv5R6HHhsfzXAGop93eNUX31yoR0c2iZM0IAnNWdbuG+Ctsxra/WIJn PT0L9XDXZYuKr4OgrITF+Pv2aLdTkzkexmC9L6OGQbIAuaZXL4x8M5gOdj0yN7Uku2/J poaJN/R1cRZtm2XPk/C6fkZmtuoTfbN3MPkGMk8uYvcX1X5AvnwPGeEZEfZlOs9UKl/Z mgTu5n1NvqKFkTQpFm6riYPd9ag77GGTFGfTR5wQltucbYf6AMumYRWBUOUzviSprDg8 Wg== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 316rya8ff0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 26 May 2020 17:16:28 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id C6EF510002A; Tue, 26 May 2020 17:16:27 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node3.st.com [10.75.127.9]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id B5EF32C1DA0; Tue, 26 May 2020 17:16:27 +0200 (CEST) Received: from localhost (10.75.127.51) by SFHDAG3NODE3.st.com (10.75.127.9) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 26 May 2020 17:16:27 +0200 From: Benjamin Gaignard To: , , , , , , , , , CC: , , , , , Benjamin Gaignard Subject: [RFC 2/3] cpufreq: governor: Use minimum load QoS Date: Tue, 26 May 2020 17:16:18 +0200 Message-ID: <20200526151619.8779-3-benjamin.gaignard@st.com> X-Mailer: git-send-email 2.15.0 In-Reply-To: <20200526151619.8779-1-benjamin.gaignard@st.com> References: <20200526151619.8779-1-benjamin.gaignard@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.51] X-ClientProxiedBy: SFHDAG5NODE2.st.com (10.75.127.14) To SFHDAG3NODE3.st.com (10.75.127.9) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.687 definitions=2020-05-26_02:2020-05-26,2020-05-26 signatures=0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Make sure that the returned load is above the system-wide minimum load QoS. Devices could set this specific QoS to inform governors about their need in terms of CPU load when computing it from idle time isn't accurate. Signed-off-by: Benjamin Gaignard --- drivers/cpufreq/cpufreq_governor.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index f99ae45efaea..1494e5e4c788 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -118,6 +118,7 @@ unsigned int dbs_update(struct cpufreq_policy *policy) unsigned int ignore_nice = dbs_data->ignore_nice_load; unsigned int max_load = 0, idle_periods = UINT_MAX; unsigned int sampling_rate, io_busy, j; + unsigned int qos_min_load; /* * Sometimes governors may use an additional multiplier to increase @@ -225,6 +226,10 @@ unsigned int dbs_update(struct cpufreq_policy *policy) policy_dbs->idle_periods = idle_periods; + qos_min_load = cpufreq_minload_qos_limit(); + if (qos_min_load > max_load) + max_load = qos_min_load; + return max_load; } EXPORT_SYMBOL_GPL(dbs_update);