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Thu, 23 Oct 2025 04:28:51 +0000 Message-ID: Date: Wed, 22 Oct 2025 21:28:48 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v12 15/31] x86,fs/resctrl: Fill in details of events for guid 0x26696143 and 0x26557651 To: Tony Luck , Fenghua Yu , "Maciej Wieczor-Retman" , Peter Newman , James Morse , Babu Moger , Drew Fustini , Dave Martin , Chen Yu CC: , , References: <20251013223348.103390-1-tony.luck@intel.com> <20251013223348.103390-16-tony.luck@intel.com> From: Reinette Chatre Content-Language: en-US In-Reply-To: <20251013223348.103390-16-tony.luck@intel.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR03CA0169.namprd03.prod.outlook.com (2603:10b6:303:8d::24) To SJ2PR11MB7573.namprd11.prod.outlook.com (2603:10b6:a03:4d2::10) Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ2PR11MB7573:EE_|CYYPR11MB8408:EE_ X-MS-Office365-Filtering-Correlation-Id: 5448aeaa-e2b2-45c0-13ff-08de11ecaac8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|366016; 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In comparison I understand "event group" (thanks to struct event_group) as all aggregators of a particular type (energy or perf) that have the *same* guid and thus the same events. Does this match the intent? > and xml/CWF/OOBMSM/RMID-PERF/cwf_aggregator.xml files in the Intel PMT > GIT repository [1]. > > The counter offsets in MMIO space are arranged in groups for each RMID. > > E.g the "energy" counters for guid 0x26696143 are arranged like this: > > MMIO offset:0x0000 Counter for RMID 0 PMT_EVENT_ENERGY > MMIO offset:0x0008 Counter for RMID 0 PMT_EVENT_ACTIVITY > MMIO offset:0x0010 Counter for RMID 1 PMT_EVENT_ENERGY > MMIO offset:0x0018 Counter for RMID 1 PMT_EVENT_ACTIVITY > ... > MMIO offset:0x23F0 Counter for RMID 575 PMT_EVENT_ENERGY > MMIO offset:0x23F8 Counter for RMID 575 PMT_EVENT_ACTIVITY > > After all counters there are three status registers that provide > indications of how many times an aggregator was unable to process > event counts, the time stamp for the most recent loss of data, and > the time stamp of the most recent successful update. > > MMIO offset:0x2400 AGG_DATA_LOSS_COUNT > MMIO offset:0x2408 AGG_DATA_LOSS_TIMESTAMP > MMIO offset:0x2410 LAST_UPDATE_TIMESTAMP > > Define these events in the file system code and add the events > to the event_group structures. Could you please correct earlier definition to help make this transition from "feature group" to "event group" clear? > > PMT_EVENT_ENERGY and PMT_EVENT_ACTIVITY are produced in fixed point > format. File system code must output as floating point values. > > Signed-off-by: Tony Luck > Link: https://github.com/intel/Intel-PMT # [1] > --- Reinette