Re: [RFC] scheduler: improve SMP fairness in CFS

[hui]

On Tue, Jul 24, 2007 at 04:39:47PM -0400, Chris Snook wrote:
> Chris Friesen wrote:
>> We currently use CKRM on an SMP machine, but the only way we can get away 
>> with it is because our main app is affined to one cpu and just about 
>> everything else is affined to the other.
>
> If you're not explicitly allocating resources, you're just low-latency, not 
> truly realtime.  Realtime requires guaranteed resources, so messing with 
> affinities is a necessary evil.

You've mentioned this twice in this thread. If you're going to talk about this
you should characterize this more specifically because resource allocation is
a rather incomplete area in the Linux. Rebalancing is still an open research
problem the last time I looked.

Tong's previous trio patch is an attempt at resolving this using a generic
grouping mechanism and some constructive discussion should come of it.

bill

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