Hi Yanbin,
Did you first try to change
if(TopNodes[sub].Count > All.TotNumPart / (TOPNODEFACTOR * NTask * NTask))
to
if(TopNodes[sub].Count > All.TotNumPart / (TOPNODEFACTOR * NTask))
as proposed by Volker ?
http://www.mpa-garching.mpg.de/gadget/gadget-list/
see : Domain decomposition takes too much time
Cheers,
yves
> I feel the imbalance is linked to the domain decomposition. Because
> during the merger, the gas component may be decoupled from baryon
> strongly, while the domain decomposition is a global process ignoring
> the type of particles (I don't know if I'm correct), Thus when N_CPU
> increases, more regions are created. Some CPUs may have very large
> number of gas particles, some may have few gas particles.
> One thing I should tell you is that at the early stage of the simulation,
> the work-load looks nice, the imbalance become significant after
> the interaction begins.
>
>
> Am I right? If I'm, is that possible to improve that? Any comments are
> welcome.
>
> Thanks in advance.
> Yanbin.
>
>
>
>
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--
(o o)
--------------------------------------------oOO--(_)--OOo-------
Dr. Yves Revaz
Laboratory of Astrophysics EPFL
Observatoire de Sauverny Tel : ++ 41 22 379 24 28
51. Ch. des Maillettes Fax : ++ 41 22 379 22 05
1290 Sauverny e-mail : Yves.Revaz_at_epfl.ch
SWITZERLAND Web : http://www.lunix.ch/revaz/
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Received on 2010-06-30 10:39:01