From patchwork Tue Aug 15 06:15:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Meng, Li \(Jassmine\)" X-Patchwork-Id: 714115 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 429B2C04A6A for ; Tue, 15 Aug 2023 06:17:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232771AbjHOGQr (ORCPT ); Tue, 15 Aug 2023 02:16:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60126 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234891AbjHOGQN (ORCPT ); Tue, 15 Aug 2023 02:16:13 -0400 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2062b.outbound.protection.outlook.com [IPv6:2a01:111:f400:7eab::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B6072183; Mon, 14 Aug 2023 23:16:11 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=LSiZwu9ehuX9LKpE4/eqeCQ2ADQt5qDmX99scLaoXSEtjteCG9/420GkvMwlHA/Jh5Rt3QhZ7P0l0GgZCKKUYMI3NQLIKCWeOsCM1xadb7mgvDRUJz+JqNlKfD0ia5/T3sBQfFzxPAoLcLdF17Njf4fXdaRwACiN/aVVGCy3hCVGO1q3hREfUdohl46S/D+WrcybUiPeRnAb1DFdLT5lovWDa8PFHymLWzOT+QPTF3TKKWraVZ6VVrYoEN9hYxtSAV06/mIo0oaulMEUX1mX5ItmOW3+gvz8I2BFcGXVEfV8aY6P4DoX7PKnihAg4yI2yM5jfxZy3ydbq1t831e6UA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=kr6tYcyJnpQUoOqfK/IAVeqXQkT4tMaEKIh0UCMHWWs=; b=JZEQS+0svO5OjDvksIF/M5movHYaQKGEb2I/sWzVXw8vcUGffU0sjnNE+3A/gTbxcBu51BKRcZTb8O+Ol7j1Eb+jJD3R808XXAmoj2yc7TBF8qDAFSV5CntP1de71NMJZ/gneowzyCe37SvAL7+mT247Q2L02bN959QwED6RFGyjf/Vu3QCRr8uOtZyKqjpKe7DjtvdHu/WTjTO5z1ujjFRF5Zknhzt3gHn9OlLVhw76tYeByfF9KtL8KB7DKGDAOFuR/zeqep6MlALGXEy69ZsxN0wJCDpx4iQ0YDw0vMDr/Y54L2c/qmxywEz6P7XIuuOLtT2PxAGVIq0XDayOIA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=intel.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=kr6tYcyJnpQUoOqfK/IAVeqXQkT4tMaEKIh0UCMHWWs=; b=M7tqLS/88x67QQQ/SI6V4jveo65nzX9F7UhWlvsvTd+u3zAbKC0w4gPzXamApRRFhsxbeUiIe7R7cqTsddujZtukrPkerV60HOyv1kaQjmvqfR5CTKHuBbQGeovitdyFDkXsyeYbSCzlPk60Pfkq9p9MPVWHbqeJNCJABhSm8ZE= Received: from SN4PR0501CA0104.namprd05.prod.outlook.com (2603:10b6:803:42::21) by DM8PR12MB5493.namprd12.prod.outlook.com (2603:10b6:8:3d::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6678.26; Tue, 15 Aug 2023 06:16:08 +0000 Received: from SA2PEPF0000150A.namprd04.prod.outlook.com (2603:10b6:803:42:cafe::a1) by SN4PR0501CA0104.outlook.office365.com (2603:10b6:803:42::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6699.14 via Frontend Transport; Tue, 15 Aug 2023 06:16:08 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by SA2PEPF0000150A.mail.protection.outlook.com (10.167.242.42) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6699.14 via Frontend Transport; Tue, 15 Aug 2023 06:16:08 +0000 Received: from jasmine-meng.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Tue, 15 Aug 2023 01:16:03 -0500 From: Meng Li To: "Rafael J . Wysocki" , Huang Rui CC: , , , , Shuah Khan , , "Nathan Fontenot" , Deepak Sharma , Alex Deucher , Mario Limonciello , Shimmer Huang , "Perry Yuan" , Xiaojian Du , Viresh Kumar , Borislav Petkov , Meng Li Subject: [PATCH V2 0/7] AMD Pstate Preferred Core Date: Tue, 15 Aug 2023 14:15:39 +0800 Message-ID: <20230815061546.3556083-1-li.meng@amd.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF0000150A:EE_|DM8PR12MB5493:EE_ X-MS-Office365-Filtering-Correlation-Id: 21572701-3295-47d6-2141-08db9d571d35 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230028)(4636009)(396003)(376002)(346002)(136003)(39860400002)(82310400008)(451199021)(186006)(1800799006)(46966006)(36840700001)(40470700004)(40480700001)(40460700003)(356005)(110136005)(54906003)(478600001)(86362001)(7696005)(6666004)(82740400003)(41300700001)(5660300002)(4326008)(70206006)(316002)(70586007)(6636002)(81166007)(2906002)(8936002)(8676002)(16526019)(36756003)(1076003)(336012)(83380400001)(26005)(426003)(2616005)(36860700001)(47076005)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Aug 2023 06:16:08.0168 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 21572701-3295-47d6-2141-08db9d571d35 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF0000150A.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM8PR12MB5493 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Hi all: The core frequency is subjected to the process variation in semiconductors. Not all cores are able to reach the maximum frequency respecting the infrastructure limits. Consequently, AMD has redefined the concept of maximum frequency of a part. This means that a fraction of cores can reach maximum frequency. To find the best process scheduling policy for a given scenario, OS needs to know the core ordering informed by the platform through highest performance capability register of the CPPC interface. Earlier implementations of AMD Pstate Preferred Core only support a static core ranking and targeted performance. Now it has the ability to dynamically change the preferred core based on the workload and platform conditions and accounting for thermals and aging. AMD Pstate driver utilizes the functions and data structures provided by the ITMT architecture to enable the scheduler to favor scheduling on cores which can be get a higher frequency with lower voltage. We call it AMD Pstate Preferrred Core. Here sched_set_itmt_core_prio() is called to set priorities and sched_set_itmt_support() is called to enable ITMT feature. AMD Pstate driver uses the highest performance value to indicate the priority of CPU. The higher value has a higher priority. AMD Pstate driver will provide an initial core ordering at boot time. It relies on the CPPC interface to communicate the core ranking to the operating system and scheduler to make sure that OS is choosing the cores with highest performance firstly for scheduling the process. When AMD Pstate driver receives a message with the highest performance change, it will update the core ranking. Changes form V1->V2: - acpi: cppc: - - Add reference link. - cpufreq: - - Moidfy link error. - cpufreq: amd-pstate: - - Init the priorities of all online CPUs - - Use a single variable to represent the status of Preferred Core. - Documentation: - - Default enabled preferred core. - Documentation: amd-pstate: - - Modify inappropriate descriptions. - - Default enabled preferred core. - - Use a single variable to represent the status of Preferred Core. Meng Li (7): x86: Drop CPU_SUP_INTEL from SCHED_MC_PRIO for the expansion. acpi: cppc: Add get the highest performance cppc control cpufreq: amd-pstate: Enable AMD Pstate Preferred Core Supporting. cpufreq: Add a notification message that the highest perf has changed cpufreq: amd-pstate: Update AMD Pstate Preferred Core ranking dynamically Documentation: amd-pstate: introduce AMD Pstate Preferred Core Documentation: introduce AMD Pstate Preferrd Core mode kernel command line options .../admin-guide/kernel-parameters.txt | 5 + Documentation/admin-guide/pm/amd-pstate.rst | 54 +++++++ arch/x86/Kconfig | 3 +- drivers/acpi/cppc_acpi.c | 13 ++ drivers/acpi/processor_driver.c | 6 + drivers/cpufreq/amd-pstate.c | 152 ++++++++++++++++-- drivers/cpufreq/cpufreq.c | 13 ++ include/acpi/cppc_acpi.h | 5 + include/linux/amd-pstate.h | 1 + include/linux/cpufreq.h | 4 + 10 files changed, 239 insertions(+), 17 deletions(-)