Messages in this thread | | | Date | Mon, 23 Jan 2017 12:30:09 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH 00/12] Cqm2: Intel Cache quality monitoring fixes |
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On Mon, Jan 23, 2017 at 10:47:44AM +0100, Thomas Gleixner wrote: > So again: > > Can please everyone involved write up their specific requirements > for CQM and stop spamming us with half baken design proposals? > > And I mean abstract requirements and not again something which is > referring to existing crap or some desired crap. > > The complete list of requirements has to be agreed on before we talk about > anything else.
So something along the lines of:
A) need to create a (named) group of tasks 1) group composition needs to be dynamic; ie. we can add/remove member tasks at any time. 2) a task can only belong to _one_ group at any one time. 3) grouping need not be hierarchical?
B) for each group, we need to set a CAT mask 1) this CAT mask must be dynamic; ie. we can, during the existence of the group, change the mask at any time.
C) for each group, we need to monitor CQM bits 1) this monitor need not change
Supporting Use-Cases:
A.1: The Job (or VM) can have a dynamic task set B.1: Dynamic QoS for each Job (or VM) as demand / load changes
Feel free to expand etc..
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