[mpich-discuss] Example MPICH2 multicore host file?

[Darius Buntinas]

You can double check how many processes would run on each machine by doing:
  mpiexec -n 10 hostname
(substitute an appropriate number of processes for "10")
This will run 10 processes which print out the name of the machine
they're running on.  You can then count the number of times a particular
name appears to verify that the correct number of processes are running
on each machine.

-d

On 04/02/2009 07:10 PM, Steve Smith wrote:
> I am running mpich2 on two multicore machines (linux dual-quad-core and
> OSX dual-core).
> 
> I haven't had any problems with building and running code. However, I've
> seen some behavior that makes me wonder if data/processing is actually
> being subdivided between my cores - or whether they are all getting the
> same data.
> 
> I have not seen an example of a working MPICH2 hostfile. Based on the
> OPENMPI ans MPICH1 examples at
> http://cs.calvin.edu/curriculum/cs/374/homework/MPI/01/multicoreHostFiles.html I'm
> thinking my MPICH2 hostfile should have a different format.
> 
> Can anyone point me to a working example MPICH2 multicore hostfile?
> 
> Sincerely,
> 
> -Steve Smith
> geophysics grad student
> Colorado School of Mines