On Wed, 2006-06-07 at 10:15 -0600, Christopher Friesen wrote:
> Is anyone aware of any implementations (or even research) for accurate 
> cpu controllers on SMP systems?

Christopher,

Have you tried the f-series CPU controller ? How does it fair in the
cases you describe below ?

> 
> I'd like to be able to control the cpu allocated to classes (aka 
> resource groups) with  long-term (1-minute) accuracy better than .1%, 
> and short-term (2-second) accuracy of .6% or so.

I do not think we have these goals. Maeda can elaborate more.

> 
> I want to set the guarantees on a per-cpu basis.  I need to handle the 
> case where there are fewer tasks in a class than there are cpus--the 
> performance hit of forced load balancing and task migration is less 
> important than cpu share accuracy.
> 
> Anyone have any pointers?  Research papers?  We've got the older version 
> of ckrm working reasonably well on UP, but it pretty much fell apart on SMP.

I presume by old you mean the e-series CPU controller (or the version in
SLES9 ?). 

Can you try f-series ?

> 
> Thanks,
> 
> Chris
> 
> 
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-- 

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    Chandra Seetharaman               | Be careful what you choose....
              - [EMAIL PROTECTED]   |      .......you may get it.
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