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Sat, 14 Feb 2026 15:56:22 +0000 Message-ID: <5d6ca759-e08a-4157-87ad-a32345685879@intel.com> Date: Sat, 14 Feb 2026 23:56:11 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 8/8] sched/fair: Simplify SIS_UTIL handling in select_idle_cpu() To: K Prateek Nayak CC: Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Shrikanth Hegde , "Gautham R. Shenoy" , "Ingo Molnar" , Peter Zijlstra , Juri Lelli , Vincent Guittot , References: <20260120113246.27987-1-kprateek.nayak@amd.com> <20260120113246.27987-9-kprateek.nayak@amd.com> Content-Language: en-US From: "Chen, Yu C" In-Reply-To: <20260120113246.27987-9-kprateek.nayak@amd.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SG2PR01CA0161.apcprd01.prod.exchangelabs.com (2603:1096:4:28::17) To DM4PR11MB6020.namprd11.prod.outlook.com (2603:10b6:8:61::19) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM4PR11MB6020:EE_|SA3PR11MB7413:EE_ X-MS-Office365-Filtering-Correlation-Id: e8f91558-29c4-45c1-d128-08de6be19986 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|366016|7053199007; X-Microsoft-Antispam-Message-Info: =?utf-8?B?T1VSanpmMHVxNlhxR0xHbG9kYWZJZm9Td01PZDBxeWx3S29DR1pVV3c0NW5L?= =?utf-8?B?aVR3aEJTZU1pbExwYlViSHBZMWoydjVwL0MxZ0FzTjV2RC9NL3JzNlhuVGh2?= =?utf-8?B?cXVhM1NkNnVmdmsrWnlSVDhQc05iV01EUUdSY3dTUVlsZUNrV1ZHQUEzT2lv?= =?utf-8?B?WHFiRkhOY0N4RjQ2dFlQTEdoRTRvUEY3c2NFMnA0SmEwUnVhRWNSd1FPeDAx?= =?utf-8?B?ZE93T0JpS0E4NndwV0RHS09JRjRVUGFaa0QyVndOZWhqZzgyRXQ0ZlI4cDQ1?= =?utf-8?B?MkpTSmRRUU5LeGl0a1dQUEszeDhMaWNsRkNoVVBSY0VjQW84bmJlZ2hrdmZN?= =?utf-8?B?T3FGMTFEeVZ5VCtqV2JoY0ZZVzVYQU94Y1pzN2ZIZkt4L2dzMjJxM1kvYTRo?= =?utf-8?B?aDd3V0l0NmlTKzdBdlF4bUt1OStQWWxqTzNGRUZWYUY0dG5adGFrSW9YaWpT?= =?utf-8?B?UEFEb3JHbDQvUkd3QWlyVFZvQktTdlpKSDdmQ29Iajk3U0RVbFRmWnlnWmxN?= =?utf-8?B?Rk8rdG4zRU5DT2xpcU9XRTJvNTZBOVlFTW1GT0dJUVZGRFRXY0dJUjd2akwv?= =?utf-8?B?Zk5ZWG9RT0NJTVJpNGpmYW9HbElpcHVFNSsvVEFYdFB4M1RwcE1DKzZpRlAv?= =?utf-8?B?dmVCUUlSM01XWWJZS1kzTk9QSDhlbjVMVWpKVWRDNWN0ZVZ4WHJEUmRFR3VH?= =?utf-8?B?TjNoMHdtU2NvbStPbk9MM0pHNUlsY0twZzE3NjJTUURZV2ZERzVPQllFNU5I?= =?utf-8?B?L1pTalZxRDUwYy9CNmZtWmJKeUxQMjlQMjJBcnZ2d1pDSVpHWi9Sa0YvRWcx?= =?utf-8?B?dXIwbHptZkptZkt4V2VaUldJQjFSM0VTVFJTdlpFMmNjcnY5bDhaWG1UN1Nm?= =?utf-8?B?Zys1cmpGLzhhYjRJUWNZL0FOYk02a0ZnQkREbnM2Z3dxNG1CdG9IS2JOU093?= =?utf-8?B?ck9LcG5IU1UrMGVVejRNMkIxU1FYMmlmRGs1dVljdEJHejNSSWVHc1lmSEVo?= =?utf-8?B?S2dIWDhlUHRmQ1pLZ3dmNlV3VjFrcWFqdEp4TDZaMzNlRkFTMmU1YTVhVFdN?= =?utf-8?B?SjBUelBNaTF5RDNyQjlzU1NjQ29Wb2Vpa3BKOWJMRnl4MzFyaVU0TWl5SEZm?= =?utf-8?B?QzAxbUpKNEd0dng1eS9KMEV4YUV1eG53YTdSb0x5MTE2dFkxdmovcFdDTlQ4?= =?utf-8?B?QmxabDhqK0dBVmp6RmcyU2FYUFl1ME5Rajg0cEMzS0hHbHRuZ3BiRHVsTzZW?= =?utf-8?B?em5Pb25na2NxRnhlMlR5T3NORzhkVldDbE5OcWZDdEZzcnkyU1NaQ2hhTGdP?= =?utf-8?B?d1NJS3Y0azRpSGlOZUs2TG1tOFhQNFQ3dDZVWUZCbFQzdW91YXp5d3dHdlJM?= =?utf-8?B?MnlQeDJJVzZlb0xPQzQxcjMvZWROZWhoSjN4Vng3ZklPWHU5WHkyZ2FXRjNy?= =?utf-8?B?c1VuZU1XMWkzNE5WRUhDdWR3cmFuTkM2SXJxMmg2Z1lDRWdIcGtMTE1KRytn?= =?utf-8?B?MzBuTXRKNXBDVkNZeWVCdnRoMERQbmpSWDgwTG5QaUhZWm50ei9vTXJvVXBM?= =?utf-8?B?bXNyaHB6S1k1by8rN0ZubGNUT0lmTVVaZjBsRUVkUVBoT1M5bHl1S0lTc0JV?= =?utf-8?B?K1RDck9zbitnYitRWFB2cnhrR2orWlpPaFVRQXZnT2I3R3o1Q2VFRUZmaStC?= =?utf-8?B?b25sc2g4RHY5QkxTa1ZNZDdyOUlHbG5rNGdaUEtNUzRoZzd0YWF5Wk44MExr?= =?utf-8?B?L3pZbXozODJ0RzNOSlo2d1BsYVZiejBuTmw5VWVMdm1DaTE3QTJqNG1jWFBK?= =?utf-8?B?QWJiMi9BNHI3SHg4ckFKMk1ESkczbEdQMGY2OG5QQWRNRVJSN1VHcmRadVda?= =?utf-8?B?Z0wrd1NXdzc3aVRCeWxYd01BOG5wQklEeVYwaEdNb1lPVEVpZWNzWUdRNWlp?= =?utf-8?B?c3NmVUQyUkhDZXZDL1FQcWlEdEc1OHZpQThNekR5U3pLSWpvenJXLysrYjJu?= =?utf-8?B?WWJZVTdkeC92enF0T0Y5RE1STE9JQWZ2M1hsOUIrWHNrYTFyWml3eTMvT3JD?= =?utf-8?B?MFhucEtnYUVQc01zSkJjZ1owTkkvelhrMitrOTFrRnE4aFNIYTMvZ08xbklX?= =?utf-8?Q?OGXg=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM4PR11MB6020.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(376014)(366016)(7053199007);DIR:OUT;SFP:1101; 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(Netperf is of the greatest interest because SIS_UTIL had a substantial impact on netperf when it was first introduced.) I suppose sched/topology: Switch to assigning "sd->shared" from s_data will have a new version, I'll look at it when it is posted. netperf baseline llc Hmean-96pairs 119.86 ( 0.00%) 122.21 ( 1.96%) Hmean-192pairs 56.48 ( 0.00%) 57.37 ( 1.57%) Hmean-288pairs 78.27 ( 0.00%) 78.21 ( -0.08%) Hmean-384pairs 62.69 ( 0.00%) 62.98 ( 0.47%) thanks, Chenyu