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Tue, 12 Nov 2024 22:25:20 +0000 Message-ID: <6e614ae5-b7ee-44bf-8d33-93bd9a92aae2@intel.com> Date: Tue, 12 Nov 2024 14:25:18 -0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v8 7/7] x86/resctrl: Document the new "mba_MBps_event" file To: Tony Luck , Fenghua Yu , "Peter Newman" , Jonathan Corbet , Shuah Khan , CC: James Morse , Jamie Iles , Babu Moger , Randy Dunlap , "Shaopeng Tan (Fujitsu)" , , , References: <20241029172832.93963-1-tony.luck@intel.com> <20241029172832.93963-8-tony.luck@intel.com> Content-Language: en-US From: Reinette Chatre In-Reply-To: <20241029172832.93963-8-tony.luck@intel.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4P223CA0023.NAMP223.PROD.OUTLOOK.COM (2603:10b6:303:80::28) To SJ2PR11MB7573.namprd11.prod.outlook.com (2603:10b6:a03:4d2::10) Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ2PR11MB7573:EE_|DM4PR11MB7351:EE_ X-MS-Office365-Filtering-Correlation-Id: bcca9b26-3dab-4a1e-1664-08dd0368e488 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|1800799024|366016|376014; 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I expected at least a verb to summarize what this patch does. > > Signed-off-by: Tony Luck > --- > Documentation/arch/x86/resctrl.rst | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/Documentation/arch/x86/resctrl.rst b/Documentation/arch/x86/resctrl.rst > index a824affd741d..d86081e76bbf 100644 > --- a/Documentation/arch/x86/resctrl.rst > +++ b/Documentation/arch/x86/resctrl.rst > @@ -384,6 +384,16 @@ When monitoring is enabled all MON groups will also contain: > Available only with debug option. The identifier used by hardware > for the monitor group. On x86 this is the RMID. > > +When the "mba_MBps" mount option is used all CTRL_MON groups will also contain: > + > +"mba_MBps_event": > + Reading this file shows which memory bandwidth event is used > + as input to a software feedback loop to keep memory bandwidth Since there is only one "software feedback loop" it could be specific: " ... input to the software feedback loop that keeps memory bandwidth ..." > + below the value specified in the schemata file. Writing the > + name of one of the supported memory bandwidth events found in > + /sys/fs/resctrl/info/L3_MON/monfeatures will change the input "monfeatures" -> "mon_features" "will change the input event" -> "changes the input event" (changes to document expectations wrt timing to be included) > + event. > + > Resource allocation rules > ------------------------- > Reinette