Re: [RFC] CPU hard limits

Avi Kivity
2009-06-05T05:23:28Z

Balbir Singh wrote:
>> But then there is no other way to make a *guarantee*, guarantees come
>> at a cost of idling resources, no? Can you show me any other
>> combination that will provide the guarantee and without idling the
>> system for the specified guarantees?
>>
>
> OK, I see part of your concern, but I think we could do some
> optimizations during design. For example if all groups have reached
> their hard-limit and the system is idle, should we do start a new hard
> limit interval and restart, so that idleness can be removed. Would
> that be an acceptable design point?

I think so. Given guarantees G1..Gn (0 <= Gi <= 1; sum(Gi) <= 1), and a
cpu hog running in each group, how would the algorithm divide resources?

--
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