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Thu, 3 Apr 2025 02:47:58 +0000 Message-ID: <7cbbbd8f-a4b4-491d-bb60-97defff6007c@intel.com> Date: Thu, 3 Apr 2025 10:47:44 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] sched/numa: Add statistics of numa balance task migration and swap To: =?UTF-8?Q?Michal_Koutn=C3=BD?= CC: Peter Zijlstra , Ingo Molnar , Juri Lelli , Vincent Guittot , Mel Gorman , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , "Muchun Song" , Andrew Morton , "Tim Chen" , Aubrey Li , Rik van Riel , Raghavendra K T , K Prateek Nayak , Baolin Wang , "Xunlei Pang" , , , , Chen Yu References: <20250402010611.3204674-1-yu.c.chen@intel.com> Content-Language: en-US From: "Chen, Yu C" In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SG2PR02CA0095.apcprd02.prod.outlook.com (2603:1096:4:90::35) 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_|CYYPR11MB8357:EE_ X-MS-Office365-Filtering-Correlation-Id: 49cf8ff4-cef6-49e0-4a97-08dd7259f14d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|366016|1800799024; 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Yes, we can iterate the /proc/$pid/sched to find the accumulated NUMA stat, and the introduction of per - cgroup numa stat can help users more conveniently track the overall data of the workload. Besides, I'm considering evaluating the per - cgroup NUMA balance control[1] to help users do fine - grain control per workload. This per - cgroup NUMA balance stat could be used to evaluate the efficiency of per - cgroup NUMA balance. > Also, you may want to update Documentation/admin-guide/cgroup-v2.rst > too. Got it, will do in next version. [1] https://lore.kernel.org/lkml/b3f1f6c478127a38b9091a8341374ba160d25c5a.1740483690.git.yu.c.chen@intel.com/ thanks, Chenyu > > Thanks, > Michal