[Users] several questions on pugh

[Hee Il Kim]

Hi,

I have several questions about pugh. When I run a 64 cubed single
cpu simulation, the cactus run shows

INFO (CartGrid3D): x=>[0,63]  y=>[0,63]  z=>[0,63]
INFO (PUGH): MPI Evolution on 1 processors
INFO (PUGH): 3-dimensional grid functions
INFO (PUGH):   Size: 64 64 64
INFO (PUGH):   Processor topology: 1 x 1 x 1
INFO (PUGH):   Local load: 262144   [64 x 64 x 64]

Nothing strange. But when I make a mpirun, for example, using 8 cpus (=8 cpu
cores),

INFO (CartGrid3D): x=>[0,63]  y=>[0,63]  z=>[0,63]
INFO (PUGH): MPI Evolution on 8 processors
INFO (PUGH): 3-dimensional grid functions
INFO (PUGH):   Size: 64 64 64
INFO (PUGH):   Processor topology: 2 x 2 x 2
INFO (PUGH):   Local load: 35937   [33 x 33 x 33]

Why is the local load 33x33x33? I think it should be 32x32x32 or 34x34x34
if it includes ghostzones with stencil 1 ? I can get a correct result even
with this problem. What does the local load represent?

In order to look into further, I tried to use CCTK_MyProcs function. But I
only get rank 0. In fact I don't know how to display the rank of computing
node cpus. I tried "-r[o|e]" option for cactus run but no lucks.

I'm using 6 node intel dual core (presler 930) cluster. I use Cactus for
numerical relativity but I'm a newbie on computational science. I appreciate
your kind helps in advance.

Kim, Hee Il
from Korea
heeilkim at gmail.com
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