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Mon, 28 Nov 2022 11:08:57 -0600 From: Perry Yuan To: , , , CC: , , , , , , , , Subject: [PATCH v5 9/9] Documentation: introduce amd pstate active mode kernel command line options Date: Tue, 29 Nov 2022 01:03:14 +0800 Message-ID: <20221128170314.2276636-10-perry.yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221128170314.2276636-1-perry.yuan@amd.com> References: <20221128170314.2276636-1-perry.yuan@amd.com> 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: BN8NAM11FT058:EE_|IA1PR12MB8077:EE_ X-MS-Office365-Filtering-Correlation-Id: 90f4e328-3a41-44ce-1f02-08dad1633ed7 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:(13230022)(4636009)(346002)(376002)(136003)(39860400002)(396003)(451199015)(36840700001)(46966006)(40470700004)(8676002)(36756003)(40460700003)(4326008)(2906002)(5660300002)(86362001)(41300700001)(36860700001)(8936002)(44832011)(7696005)(47076005)(6666004)(83380400001)(16526019)(26005)(426003)(2616005)(186003)(1076003)(336012)(54906003)(81166007)(110136005)(356005)(316002)(82310400005)(70206006)(70586007)(82740400003)(40480700001)(478600001)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Nov 2022 17:09:01.2130 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 90f4e328-3a41-44ce-1f02-08dad1633ed7 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: BN8NAM11FT058.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB8077 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750761119737827097?= X-GMAIL-MSGID: =?utf-8?q?1750761119737827097?= AMD Pstate driver support another fimware based autonomous mode with "amd_pstate=active" added to the kernel command line. In autonomous mode SMU firmware decides frequencies at 1 ms timescale based on workload utilization, usage in other IPs, infrastructure limits such as power, thermals and so on. Signed-off-by: Perry Yuan --- Documentation/admin-guide/kernel-parameters.txt | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 42af9ca0127e..8fa0d45add03 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -6970,3 +6970,10 @@ management firmware translates the requests into actual hardware states (core frequency, data fabric and memory clocks etc.) + active + Use amd_pstate_epp driver instace as the scaling driver, + driver provides a hint to the hardware if software wants + to bias toward performance (0x0) or energy efficiency (0xff) + to the CPPC firmware. then CPPC power algorithm will + calculate the runtime workload and adjust the realtime cores + frequency.