I want to run delwaq2 on 28 processors. I used the nothreads command
to manage the computations. When I use -nothreads 1 it runs fine,
without errors. When I use -nothreads 2 or 3 it runs fine, with some
warnings but the Simulation is not crashed. Using 4 and more
processors the simulation will be crashed. I attached the simulation
files from 1,2,3 and 4 processors. Could you tell me how can I solve
Hm, seems like you are running multiple instances of Delwaq at once.
This is not how is parallelism in Delwaq works. Delwaq uses OpenMP
parallelisation, so only one instance of Delwaq should be running on
one node, which could use multiple threads. Seen from your screen dump
you have an extra tool to launch multiple Delwaq's on 4 nodes. They
will all try to write the same files, so this will crash...
It might be that the command line option -nothreads also trigers the
multiple instances of Delwaq. It is best to set the number of threads
in the input file of Delwaq itself in block 7 (which is terminated
by #7) through the special constant nothreads. Like
CONSTANTS nothreads DATA 0.0
You can either set it to 0 (max number of threads) or to the
number of threads you want. No command line argument is needed then.
If you need more info, look in the Input File Description
manual (section 220.127.116.11).
Hi Michelle, thanks a lot. Now it works fine.