If you require that a specific rank go to a specific core, then use the rankfile mapper - you can see explanations on the syntax in "man mpirun"

If you just want mpirun to respect an external cpuset limitation, it already does so when binding - it will bind within the external limitation


On Aug 18, 2013, at 6:09 AM, Siddhartha Jana <siddharthajana24@gmail.com> wrote:

So my question really boils down to:
How does one ensure that mpirun launches the processes on the "specific" cores that are expected of them to be bound to. 
As I mentioned, if there were a way to specify the cores through the hostfile, this problem should be solved. 

Thanks for all the quick replies,
-- Sid

On 18 August 2013 09:04, Siddhartha Jana <siddharthajana24@gmail.com> wrote:
Thanks John. But I have an incredibly small system. 2 nodes - 16 cores each.
2-4 MPI processes. :-)

On 18 August 2013 09:03, John Hearns <hearnsj@googlemail.com> wrote:

You really should install a job scheduler.
There are free versions.

I'm not sure about cpuset support in Gridengine. Anyone?


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