Re: [ckrm-tech] Virtual NUMA machine and CKRM

[Chandra Seetharaman <sekharan@us.ibm.com>]

On Fri, May 27, 2005 at 07:15:58AM -0700, Dave Hansen wrote:
> On Fri, 2005-05-27 at 22:16 +0900, Hirokazu Takahashi wrote:
> > Why don't you implement CKRM memory controller as virtual NUMA
> > node.
> > 
> > I think what you want do is almost what NUMA code does, which
> > restricts resources to use. If you define virtual NUMA node with
> > some memory and some virtual CPUs, you can just assign target jobs
> > to them.
> > 
> > What do you think of my idea?
> 
> First of all, NUMA nodes don't have any balancing done on them, so I
> don't think they're an appropriate structure.  But, NUMA nodes *do*
> contain zones, which are a slightly more appropriate structure.
> 
> One thing I pointed out when he first posted this code was that a lot of
> the accounting gets shifted from the 'struct zone' to the ckrm class.
> It was appropriate to have a set of macros to set up and perform this
> indirection.
> 
> However, a 'struct zone' currently has more than one job.  It collects
> "like" pages together, it provides accounting for those pages, and it
> represents a contiguous area of memory.
> 
> If you could collect just the accounting pieces out of 'struct zone',
> perhaps those could be used by both ckrm classes, and the old 'struct
> zone'.

will look into it.

Thanks
> 
> -- Dave
> 

-- 

----------------------------------------------------------------------
    Chandra Seetharaman               | Be careful what you choose....
              - sekharan@us.ibm.com   |      .......you may get it.
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