[MITgcm-support] problems at tile bdys?

[Jean-Michel Campin]

Hi Jody,

I tried to reproduce the problem, using your set-up with sNx=47,nPx=8
(sNy=16,nPy=2):
1) it runs fine with no tile egdes problem on the 1rst cluster, using
 gfortran and openmpi (optfile: linux_amd64_gfortran);
2) same good results on an other cluster, using
 ifort (10.0.025) and mpich-mx-1.2.7 (optfile: linux_amd64_ifort_beagle)
3) but when I try (on the 1rst cluster) to use
 ifort (13.0.0.079) and mvapich2-1.7 (optfile: linux_amd64_ifort11)
 it blows up at iteration 68 and show same problems as in your run.
 And with same compiler/mpi/optfile, with sNx=48 it runs fine (no problem).
 
So, it looks like there is a problem with ifort 13.0 (can't be MPI
 since your are using the intel one and (3) fails with mpich2).
Will take a look at compiler options.

Cheers,
Jean-Michel

PS: The problem in Yuan's setup is different: it can be reproduced with
 gfortran & openmpi.

On Mon, Jun 17, 2013 at 08:39:18PM -0700, Jody Klymak wrote:
> 
> On Jun 17, 2013, at  17:29 PM, Jody Klymak <jklymak at uvic.ca> wrote:
> 
> > If I run with nx=48, then I do not get an instability.  If I run with nx=47, I do (see attached PDFs).  If I run with exch2, the instability is different, but still there.
> 
> I should clarify, the instability is probably different between exch1 and exch2 because the initial conditions for \eta were different.  I initialize \eta with random red noise, so different realizations have a different instability response.  
> 
> Thanks,   Jody
> 
> --
> Jody Klymak    
> http://web.uvic.ca/~jklymak/
> 
> 
> 
> 
> 
> _______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
> http://mitgcm.org/mailman/listinfo/mitgcm-support