Apply Frank Loeffler's patch to improve the processor distribution of

PUGH:

Up to now, PUGH does not take the actual grid size into account while
setting the number of processors/domains in each direction.  This
gives problems, e.g. using boxes like 200x7x7 (with 3 ghostzones).  It
also does not really do a good job in situations with non near-cubic
domains (like in bitant mode it devides first in the z-direction,
which is usually the smallest).

I inserted another decomposition algorithm which is looking for the
longest direction and devides this if possible.  Because it was done
to be easy to understand, it can fail in certain situations, in which
it is gracefully falling back to the old decomposition (e.g. a cubic
box and 9 processors).

To include this algorithm I added a keyword "automatic_old" to
PUGH::processor_topology.  The new behaviour is the default; this
keyword re-enables the old behaviour.


git-svn-id: http://svn.cactuscode.org/arrangements/CactusPUGH/PUGH/trunk@471 b61c5cb5-eaca-4651-9a7a-d64986f99364

1 files changed, 1 insertions, 0 deletions

diff --git a/src/SetupPGH.c b/src/SetupPGH.c
index 8b56808..ab71fb4 100644
--- a/src/SetupPGH.c
+++ b/src/SetupPGH.c
@@ -144,6 +144,7 @@ pGH *PUGH_SetupPGH (void *callerid,
     }
 
     pughGH->Connectivity[idim-1] = PUGH_SetupConnectivity (idim, pughGH->nprocs,
+                                                           nsize, nghostzones,
                                                            nprocs, perme);
     free(nprocs);