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Fri, 13 Nov 2026 01:18:59 -0600 Received: from satlexmb08.amd.com (10.181.42.217) by satlexmb10.amd.com (10.181.42.219) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.53; Fri, 13 Nov 2026 01:18:59 -0600 Received: from [10.136.34.22] (10.180.168.240) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server id 15.2.2562.53 via Frontend Transport; Fri, 13 Nov 2026 01:18:55 -0600 Message-ID: <43c99fe6-f1b7-4992-b4b7-82a96c9415e1@amd.com> Date: Fri, 13 Nov 2026 12:48:49 +0530 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/2] platform/x86/amd/hfi: Rank SMT siblings below primary cores for ITMT packing To: Aiden Hecker , Huang Rui , Mario Limonciello , Perry Yuan , "Rafael J . Wysocki" , Viresh Kumar , Hans de Goede , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , Vishal Badole CC: Ingo Molnar , Peter Zijlstra , , , References: <20261113022934.13397-1-heckeraiden@gmail.com> <20261113022934.13397-3-heckeraiden@gmail.com> Content-Language: en-US From: K Prateek Nayak In-Reply-To: <20261113022934.13397-3-heckeraiden@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: IA0PEPF00000039:EE_|PH8PR12MB6916:EE_ X-MS-Office365-Filtering-Correlation-Id: 62bfccda-2b94-48dc-b0f6-08df41566368 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|7416014|376014|1800799024|82310400026|36860700016|10067099003|11063799006|56012099006|4143699003|261022105027099003|261026140227099003|261022075727099003|261028144727099003|261009223027099003|22082099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:;CAT:NONE;SFS:(13230040)(23010399003)(7416014)(376014)(1800799024)(82310400026)(36860700016)(10067099003)(11063799006)(56012099006)(4143699003)(261022105027099003)(261026140227099003)(261022075727099003)(261028144727099003)(261009223027099003)(22082099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 7pAXk8GNdEUymXhP1FE2+25xN/5l1voMY4ySaovtL21VFFrPVnShYEWUadWmNYkudqxy/YcDeHlxeGt27RhGgzeaXDWgr+zIeF/aJJoGdqaiFU9CH4Z6MnPeyjJn39v+J3B0KGjezrUeu0HbwIxmD41Ws1wy7/AC4b3y7pjNVkBPgX9v0C6WR4ZKeeTwC5orGYB1qOPzDkElu7vr1+cvpQqWRfzvCNWjcIqlkVPsdWtQHmhu7MSFBomS01f6i71T65NH6VMGh8HeI8qraS1wEEIzhDZx2NAnFoIlbsQRo02wt0IyUz4QncuNB7OdX2Jn3dK9xdj2GioIRGC5JOyqE243x4395MuEBTM00j/jGThgpBdJzHOZFCJfE/2BQdl/5zi1TpfYJbVNq3WADDs7x8ju5CQ8FAyRmfMUFy704e6IamRDcdFFevScltVuV0VK X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Nov 2026 07:18:59.9244 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 62bfccda-2b94-48dc-b0f6-08df41566368 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=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: IA0PEPF00000039.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB6916 Hello Aiden, On 11/13/2026 7:59 AM, Aiden Hecker wrote: > Tested-by: Aiden Hecker We assume you've tested the changes you are signing off on :-) > Signed-off-by: Aiden Hecker [..snip..] > + /* > + * Rank secondary SMT siblings slightly below primary threads so > + * SD_ASYM_PACKING fills idle physical cores first while still keeping > + * classic Zen 5 SMT siblings ordered ahead of dense Zen 5c cores. > + */ > + prio = hfi_cpuinfo->ipcc_scores[0]; > + if (cpu_feature_enabled(X86_FEATURE_AMD_HTR_CORES)) { > + sib_mask = topology_sibling_cpumask(cpu); > + if (!cpumask_empty(sib_mask) && cpumask_first(sib_mask) != cpu) > + prio = (prio * 7) / 8; > + } > + > + sched_set_itmt_core_prio(prio, cpu); If asym capacity is enabled, we should not use the IPCC information. The scheduler is smart enough to go find an idle core if it exists that fits the task capacity. > > return 0; > } -- Thanks and Regards, Prateek