Re: [PATCH v8 05/24] x86/resctrl: Track the closid with the rmid

James Morse
2024-01-22T18:05:30Z

Hi Reinette,

On 16/12/2023 04:58, Reinette Chatre wrote:
> On 12/15/2023 9:43 AM, James Morse wrote:
>> x86's RMID are independent of the CLOSID. An RMID can be allocated,
>> used and freed without considering the CLOSID.
>>
>> MPAM's equivalent feature is PMG, which is not an independent number,
>> it extends the CLOSID/PARTID space. For MPAM, only PMG-bits worth of
>> 'RMID' can be allocated for a single CLOSID.
>> i.e. if there is 1 bit of PMG space, then each CLOSID can have two
>> monitor groups.
>>
>> To allow resctrl to disambiguate RMID values for different CLOSID,
>> everything in resctrl that keeps an RMID value needs to know the CLOSID
>> too. This will always be ignored on x86.
>
> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>

Thanks!

James