[Swift-devel] How is hostCount handled by JETS Swift coaster interface?

[Michael Wilde]

So hostCount=2 essentially does an mpirun with np=2 for an mpi_size of 2?

Even if you are not allocating by core, can you set the mpi_size to nodes x cores?

- MIke

----- Original Message -----
> From: "Justin M Wozniak" <wozniak at mcs.anl.gov>
> To: "Michael Wilde" <wilde at mcs.anl.gov>
> Cc: "swift-devel Devel" <swift-devel at ci.uchicago.edu>
> Sent: Tuesday, August 30, 2011 5:40:00 PM
> Subject: Re: How is hostCount handled by JETS Swift coaster interface?
> It means two distinct hosts, I have not turned on the use of
> multi-core
> yet.
> 
> On Tue, 30 Aug 2011, Michael Wilde wrote:
> 
> > Does globus::hostCount=2 really mean 2 hosts, or nproc=2 to mpi?
> >
> > How does it interact with jobsPerNode or anything similar to specify
> > how many cores are to be used per node?
> >
> > Thanks,
> >
> > - Mike
> 
> --
> Justin M Wozniak

-- 
Michael Wilde
Computation Institute, University of Chicago
Mathematics and Computer Science Division
Argonne National Laboratory