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Wed, 16 Apr 2025 16:18:17 +0000 Message-ID: <5cbd73c9-421c-4147-9922-29123f011882@intel.com> Date: Wed, 16 Apr 2025 09:18:14 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v12 18/26] x86/resctrl: Add default MBM event configurations for mbm_cntr_assign mode To: , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , References: <03cfb41a0b2538cb994fa0c5b0950b7280cf2eb7.1743725907.git.babu.moger@amd.com> <8c3aa9cd-335e-415d-a9d3-35593fdbe812@intel.com> <15852d2a-5a44-4d15-aecd-d28660a40a85@amd.com> From: Reinette Chatre Content-Language: en-US In-Reply-To: <15852d2a-5a44-4d15-aecd-d28660a40a85@amd.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR04CA0311.namprd04.prod.outlook.com (2603:10b6:303:82::16) To SJ2PR11MB7573.namprd11.prod.outlook.com (2603:10b6:a03:4d2::10) 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: SJ2PR11MB7573:EE_|DM6PR11MB4643:EE_ X-MS-Office365-Filtering-Correlation-Id: 68e3aef5-9a58-49b9-3a6c-08dd7d024c07 X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|366016; 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To maintain the same level of support, two default >>> MBM configurations are added. These configurations will initially be used >>> to set up the counters upon mounting, while users will have the option to >>> modify them as needed. >> >> This jumps in quite fast by stating that MBM configurations are added but >> there is no definition of what an MBM configuration is. > > How about this? > > > By default, each resctrl group supports two MBM events: mbm_total_bytes > and mbm_local_bytes. These represent total and local memory bandwidth > monitoring, respectively. Each event corresponds to a specific MBM > configuration. Use these default configurations to set up the counters > during mount. Allow users to modify the configurations as needed after > initialization. I am still missing a definition of "MBM configuration". How about: "Each event corresponds to a specific MBM configuration." -> "Each event corresponds to an MBM configuration that specifies the bandwidth sources tracked by the event." ... >> >> There seems more and more overlap with Tony's RMID work. Did you get a >> chance to look at that? > > Looked little bit. Will have look bit closer again. I'll study that series next to catch up with Tony's plans. Reinette