Hello everyone! i tryed to use this command (you could see it below) to initiate simulation with parallel computing
The manual says that i should use this command
mpirun -np 8 liggghts -in in.script
i used for the chute_wear example
mpirun -np 8 liggghts -in in.chute_wear
But is doesn't work properly, i mean, it uses only one processor and the log says:
1 by 1 by 1 MPI processor grid
Loop time of 115.306 on 1 procs for 99999 steps with 834 atoms
yes i added
export WM_NCOMPPROCS=8 to bashrc
and nproc gives me the right number of nproc=8
well could you be so kind to tell me what have i done wrong?
P.S. The full log i put as an attachment
P.P.S. i use Intel Xeon E5620 2 sockets each of them has 8 cores and 16 logical procs, does this kind of cpu have any mpirun troubles? couse openfoam uses all cpus perfectly and gives no mistakes
| Attachment | Size |
|---|---|
 chute_wear_logs.tar_.gz | 5.54 KB |
aaigner | Tue, 09/15/2015 - 16:50
Hi Ural,
Hi Ural,
I am sry, I can't reproduce your error. It is working with my LIGGGHTS-PUBLIC.
How did you compile LIGGGHTS? Which Makefile did you use?
Bests
Andreas
ural | Tue, 09/15/2015 - 19:47
Here it is
Thanks for the fast answer, i used this manual http://www.cfdem.com/forums/liggghts-installation-guide-ubuntu-1204-lts-...
And this part
Make clean-all
make stubs
make serial
sudo ln -s /$HOME/LIGGGHTS-PUBLIC/src/lmp_serial /usr/bin/liggghts
Of this one http://www.cfdem.com/forums/compile-problems
It seems to me that i should try to use this cmnds?
sudo make clean-all
sudo make ubuntuVTK or make fedora
Am i right?
Daniel Queteschiner | Tue, 09/15/2015 - 20:01
Yes
It shouldn't come as a surprise, though, that when compiled as serial application, LIGGGHTS won't run in parallel.
Note that when using
make ubuntuVTKthe VTK 5 library is required.ural | Tue, 09/15/2015 - 20:24
And the last one about vtk
As far as i remember i got some troubles during compilation of vtk 5.8 may i use the newest one 6.3 or i must use 5.9?
Daniel Queteschiner | Wed, 09/16/2015 - 07:52
VTK
If you are on Ubuntu there are packages available for 5.8 and 6.0 so you don't have to compile it yourself.
The newest VTK version should work as well (the last I tested was VTK 6.0) but you have to use the
ubuntuVTK6makefile in that case.ural | Wed, 09/16/2015 - 14:19
Thanks!
I made it with
Make fedoraand everything went smoothly, it is intresting butMake UbuntuVTK5compilation failed