[mvapich-discuss] Core binding oversubscription with batch schedulers

[Mark Dixon]

On Mon, 14 Oct 2013, Jonathan Perkins wrote:
...
> I missed this in the earlier email.  Does this mean that the correct 
> behavior is seen with mpirun_rsh but not hydra?

No: it's just that I hadn't tested mpirun_rsh with core bindings. I have 
just done so now and it's the same behaviour I saw with the hydra 
launcher.

...
> I'm not familiar with the current state of Grid Engine.  I do hope that 
> they are moving forward in this direction as it will make it easier for 
> lots of software to "just work".
...

I think they are - maybe this is one of those problems that just go away 
in time. It's just unfortunate that MVAPICH2's default behaviour is 
harmful in these cases (until someone notices and turns core binding off).

Mark
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Mark Dixon                       Email    : m.c.dixon at leeds.ac.uk
HPC/Grid Systems Support         Tel (int): 35429
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University of Leeds, LS2 9JT, UK
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