[MITgcm-support] CRAY XD1

[Martin Losch]

Hi,

we have a new platform, a CRAY XD1, (basically opteron CPUs with a very 
fast network). I have a hard time on this machine:
I was able to run a global_ocean experiment (180x80x23, the ecco 2deg 
configuration, with KPP, GMRedi, etc.) with up to 12CPUs, scales and 
everything, but I have a different configuration (1500x1x100, or 
256x256x100,  cartesian coordinates, non-hydrostatic, but no other 
extra packages, no netcdf, runs fine on many platforms with up to 
20CPUs so far), which ends with a segmentation fault in the routine 
packages_boot.F (actually, while printing a message with 
print_message). Works only with MPI turned off.
For these two cases I use the same build_options file 
(linux_amd64_pgf77+mpi_xd1).

Any idea what might be going on?

Martin