[ESPResSo-devel] ghost flag

[Axel Arnold]

Hello all,

since there was not much response to Christoph's mail, here some more 
information.

Christoph has added a new local particle property, which is always 0 for a 
real particle, but 1 for a ghost. That of course increases the size of the 
particle structure slightly, but since this information never needs to be 
sent around, it should not dramatically hit the performance. On the other 
hand, there is since ever an ugly hack in the domain decomposition to remove 
the ghosts from the local_particles-array. That could be done much easier and 
faster with a ghost-flag.

THEREFORE: if no one has serious concerns, I will make the ghost-flag a 
standard property, which will be used in the domain decomposition. This means 
it is impossible to compile Espresso without it.

Axel

-- 
Dr. Axel Arnold 
Fraunhofer SCAI
Schloss Birlinghoven, 53754 Sankt Augustin, Germany
Tel: +49 2241 14 2575