[MITgcm-support] Independent Tiling

[Chris Horvat]

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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