[MITgcm-support] Independent Tiling

[Jean-Michel Campin]

Hi Chris,

I would sugest to start with one of the simple verification experiment
(e.g., exp2) using a clean fresh downloaded version of the code.
If the problem with MPI shows up again there, then you could report the 
full sequence of command you typed and what you are getting (log files
and output).
Otherwise, we will know that the problem is in your customised set-up
and we should investigate this.

Cheers,
Jean-Michel

On Mon, Mar 17, 2014 at 12:07:10PM -0400, Chris Horvat wrote:
> Hi Jody and Martin,
> 
> I was hoping that you would both be right but I am in fact compiling with
> mpi turned on. STDOUT reports
> 
> nTiles =    1 ; /* Total no. tiles per process ( = nSx*nSy ) */
> 
> (PID.TID 0000.0001)   nProcs =   12 ; /* Total no. processes ( = nPx*nPy )
> */
> 
> (PID.TID 0000.0001) nThreads =    1 ; /* Total no. threads per process ( =
> nTx*nTy ) */
> 
> (PID.TID 0000.0001) usingMPI =    T ; /* Flag used to control whether MPI
> is in use */
> 
> 
> and a few lines later...
> 
> 
> ======= Starting MPI parallel Run =========
> 
> 
> I've attached STDOUT.0000 to this email. I'm also submitting jobs with
> 
> mpirun -np 12 ../build/mitgcmuv > xx 2>errors.txt
> 
> 
> Any thoughts?
> 
> 
> On Mar 14, 2014 1:21 AM, "Martin Losch" <Martin.Losch at awi.de> wrote:
> 
> > Chris,
> >
> > in order to compiler with MPI you need to specify "-mpi" at the genmake2
> > step:
> >
> > genmake2 -mpi (+all the options that you normally use)
> >
> > Martin
> >
> > On Mar 14, 2014, at 2:34 AM, Klymak Jody <jklymak at uvic.ca> wrote:
> >
> > > Hi Chris.  Did you compile w MPI turned on?   Cheers.  Jody
> > >
> > > Sent from my iPhone
> > >
> > > On Mar 13, 2014, at 9:40, Chris Horvat <horvat at fas.harvard.edu> wrote:
> > >
> > >> Hi everyone,
> > >>
> > >> I've recently "upgraded" simulations to a larger domain, and now am
> > tiling results and spreading execution over several CPUs. At the moment,
> > however, all of the tiles are producing the exact same output, so it
> > appears that the model is just simulating each small tile as its own
> > channel.
> > >>
> > >> This appears to be the case even when all packages are turned off. I've
> > attached my data file and SIZE.h to this email, any suggestions?
> > >>
> > >>
> > >> Chris
> > >>
> > >> <data>
> > >> <SIZE.h>
> > >> _______________________________________________
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