AMBER Archive (2000)

Subject: parallel problem ?

From: Alexandre Gillet (gillet_at_glycine.jouy.inra.fr)
Date: Mon Mar 06 2000 - 12:41:20 CST

Dear amber users,

I am running amber 5 on a parallel machine using MPI.
The program run well but the time I get are quiet long.
On 9 processors the cpu time is 0.39 hours to do a 2ps simulation but
the job ends after almost 3hours even if there are no other jobs running
on the machine. It seems that each processors are just using only a few
percentage of the cpu available.
When I am running the same simulation on only one processor I got 2.26
hours of cpu, and I really get the result after 2 hours 25.
this time the program use all the cpu available all the time.

I would like to know if someone has already encounter this problem and
how I can fix it ?

Sincerely, 

--
==========================================================================
Alexandre Gillet

graduate student
Mathematique Informatique et Genome,
Batiment des Biotechnologies,           Email: gillet_at_glycine.jouy.inra.fr
INRA, Jouy-en-Josas, 78352, France