linux-kernel - Re: [PATCH v4 6/7] x86/resctrl: Display CLOSID and RMID for the resctrl groups

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Message-ID: <3fee06bb-a9a1-19db-b1da-70981b6f979c@amd.com>
Date:   Tue, 18 Apr 2023 09:11:41 -0500
From:   "Moger, Babu" <babu.moger@....com>
To:     Bagas Sanjaya <bagasdotme@...il.com>, corbet@....net,
        reinette.chatre@...el.com, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de
Cc:     fenghua.yu@...el.com, dave.hansen@...ux.intel.com, x86@...nel.org,
        hpa@...or.com, paulmck@...nel.org, akpm@...ux-foundation.org,
        quic_neeraju@...cinc.com, rdunlap@...radead.org,
        damien.lemoal@...nsource.wdc.com, songmuchun@...edance.com,
        peterz@...radead.org, jpoimboe@...nel.org, pbonzini@...hat.com,
        chang.seok.bae@...el.com, pawan.kumar.gupta@...ux.intel.com,
        jmattson@...gle.com, daniel.sneddon@...ux.intel.com,
        sandipan.das@....com, tony.luck@...el.com, james.morse@....com,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        eranian@...gle.com, christophe.leroy@...roup.eu, jarkko@...nel.org,
        adrian.hunter@...el.com, quic_jiles@...cinc.com,
        peternewman@...gle.com
Subject: Re: [PATCH v4 6/7] x86/resctrl: Display CLOSID and RMID for the
 resctrl groups



On 4/17/23 21:22, Bagas Sanjaya wrote:
> On 4/18/23 06:34, Babu Moger wrote:
>> +"ctrl_hw_id":
>> +	Available only with debug option. On x86, reading this file shows
>> +	the Class of Service (CLOS) id which acts as a resource control
>> +	tag on which the resources can be throttled. Kernel assigns a new
>> +	CLOSID a control group is created depending on the available
>> +	CLOSIDs. Multiple cores(or threads) or processes can share a
>> +	same CLOSID in a resctrl group.
>> +
>> <snipped>...
>> +"mon_hw_id":
>> +	Available only with debug option. On x86, reading this file shows
>> +	the Resource Monitoring ID (RMID) for monitoring the resource
>> +	utilization. Monitoring is performed by tagging each core (or
>> +	thread) or process via a RMID. Kernel assigns a new RMID when
>> +	a group is created depending on the available RMIDs. Multiple
>> +	cores (or threads) or processes can share a same RMID in a
>> +	resctrl group.
>> +
> 
> Is CONFIG_DEBUG=y required?
No. Available with resctrl dubug option.
Thanks
Babu Moger