[GRASS-user] quad core intel processor and grass

[Hamish]

stephen sefick wrote:
> I have noticed that GRASS utilizes two of the four processors when
> running a job (i.e. r.terraflow).

most modules are written only to use one. r.terraflow does lots of fancy
IO stuff so maybe will use two, although that's news to me.

> Is there a way to use more of the processors?  Is this wise?  I have
> been compiling my own GRASS and I am running ubuntu 9.10 on a quad core
> 2.5ghz 6gb RAM.

see  http://grass.osgeo.org/wiki/Parallel_GRASS_jobs
and  http://grass.osgeo.org/wiki/OpenMP


recently I have been playing around with mpirun[1] to trick a parallelized
fortran model into thinking my quad-core was a small beowulf cluster.
probably more overhead than it's worth, but perhaps some ideas in that.
[1] http://www.mcs.anl.gov/mpi/index.htm 


Hamish