Re: [PATCH 1/1] x86/cqm: Cqm requirements

[Stephane Eranian]

Hi,

On Tue, Mar 7, 2017 at 12:04 PM, Luck, Tony <tony.luck@xxxxxxxxx> wrote:
>> That's all nice and good, but I still have no coherent explanation why
>> measuring across allocation domains makes sense.
>
> Is this in reaction to this one?
>
>>> 5)      Put multiple threads into a single measurement group
>
> If we fix it to say "threads from the same CAT group" does it fix things?
>
Inside a CAT partition, there may be multiple tasks split into
different cgroups.
We need the ability to monitor groups of tasks individually within that CAT
partition. I think this is what this bullet is about.


> We'd like to have measurement groups use a single RMID ... if we
> allowed tasks from different CAT groups in the same measurement
> group we wouldn't be able to split the numbers back to report the
> right overall total for each of the CAT groups.
>
> -Tony