On Wed, 2006-09-20 at 17:42 -0700, Paul Menage wrote:
> On 9/20/06, Paul Jackson <[email protected]> wrote:
> > Chandra wrote:
> > > AFAICS, That doesn't help me in over committing resources.
> >
> > I agree - I don't think cpusets plus fake numa ... handles over commit.
> > You might could hack up a cheap substitute, but it wouldn't do the job.
>
> I have some patches locally that basically let you give out a small
> set of nodes initially to a cpuset, and if memory pressure in
> try_to_free_pages() passes a specified threshold, automatically
> allocate one of the parent cpuset's unused memory nodes to the child
> cpuset, up to specified limit. It's a bit ugly, but lets you trade of
> performance vs memory footprint on a per-job basis (when combined with
> fake numa to give lots of small nodes).
Interesting. So you could set up the fake node with "guarantee" and let
it grow till "limit" ?
BTW, can you do these with fake nodes:
- dynamic creation
- dynamic removal
- dynamic change of size
Also, How could we account when a process moves from one node to
another ?
>
> Paul
--
----------------------------------------------------------------------
Chandra Seetharaman | Be careful what you choose....
- [email protected] | .......you may get it.
----------------------------------------------------------------------
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