parallel problem ?

From: Alexandre Gillet <>
Date: Mon 06 Mar 2000 10:41:20 -0800

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 ?


Alexandre Gillet
graduate student
Mathematique Informatique et Genome,
Batiment des Biotechnologies,           Email:
INRA, Jouy-en-Josas, 78352, France
Received on Mon Mar 06 2000 - 10:41:20 PST
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