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CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230034)(376008)(82310400020)(1800799018)(36860700007); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jun 2024 07:26:06.4187 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 96e8edc4-b44f-4771-4787-08dc8b7a16ed 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: MN1PEPF0000ECD9.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CYYPR12MB8701 From: Perry Yuan Introduce AMD CPU frequency boosting control sysfs entry which used for switching boost on and boost off. If core performance boost is disabled while a core is in a boosted P-state, the core automatically transitions to the highest performance non-boosted P-state The highest perf and frequency will be limited by the setting value. Signed-off-by: Perry Yuan --- Documentation/admin-guide/pm/amd-pstate.rst | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst index 1e0d101b020a..bcc0d9404c18 100644 --- a/Documentation/admin-guide/pm/amd-pstate.rst +++ b/Documentation/admin-guide/pm/amd-pstate.rst @@ -440,6 +440,16 @@ control its functionality at the system level. They are located in the This attribute is read-only to check the state of preferred core set by the kernel parameter. +``cpb_boost`` + Specifies whether core performance boost is requested to be enabled or disabled + If core performance boost is disabled while a core is in a boosted P-state, the + core automatically transitions to the highest performance non-boosted P-state. + AMD Core Performance Boost(CPB) is controlled by this attribute file which allows + user to change all cores frequency boosting state. It supports all amd-pstate modes. + + "0" Disable Core Performance Boosting + "1" Enable Core Performance Boosting + ``cpupower`` tool support for ``amd-pstate`` ===============================================