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From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2006-11-28 19:16:55


There is not, right now. However, this is mainly because back when I
implemented the processor affinity stuff in OMPI (well over a year
ago), no one had any opinions on exactly what interface to expose to
the use. :-)

So right now there's only this lame control:

     http://www.open-mpi.org/faq/?category=tuning#using-paffinity

I am not opposed to implementing more flexible processor affinity
controls, but the Big Discussion over the past few months is exactly
how to expose it to the end user. There have been several formats
proposed (e.g., mpirun command line parameters, magic MPI attributes,
MCA parameters, etc.), but nothing that has been "good" and "right".
So here's the time to chime in -- anyone have any opinions on this?

On Nov 25, 2006, at 9:31 AM, shaposh_at_[hidden] wrote:

> Hello,
> i cant figure out, is there a way with open-mpi to bind all
> threads on a given node to a specified subset of CPUs.
> For example, on a multi-socket multi-core machine, i want to use
> only a single core on each CPU.
> Thank You.
>
> Best Regards,
> Alexander Shaposhnikov
> _______________________________________________
> users mailing list
> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users

-- 
Jeff Squyres
Server Virtualization Business Unit
Cisco Systems