Hitachi

Status

Cactus has been tested and used for large production runs on the Hitachi SR8000-F1. This machine has a native MPI implementation.

Notes

1. Initial tests have shown MPI-MPP to be far more efficient than MPI-COMPAS.
2. The -nopredicate is used for the default fortran optimisation flags to disable the generation of predicate operations which potentially cause code crashes for constructs like

if (use_mask) then 
  a(i) = mask(i) 
else 
  a(i) = 0 
end if

where the mask() array is passed in as a NULL pointer from the C wrapper (and use_mask is set to false).