OpenFOAM 14 Parallel build

mplongjr · May 8, 2007, 12:09

Hi all... I've been using OpenFOAM 1.3 for several months now and I've been very impressed with it's capabilities. In the 1.4 release notes, there is mention of a parallel build process with wmake, but I can't find any mention of how to initiate it.

I naively tried ./Allwmake -j 2 .. but it didn't seem to use more than one process..

Is there something I'm missing?

mbeaudoin · May 8, 2007, 22:48

Mike,

There is a new environment variable called $WM_NCOMPPROCS.

Check out the file $WM_DIR/wmake for the details.

The funny thing is: that variable is not initialized under OpenFOAM 1.4.

Just add the following line to your $WM_PROJECT_DIR/$FOAM_DOT_DIR/bashrc

export WM_NCOMPPROCS=2

Adjust the number to the number of processors you want to use for compiling.

(For csh, adjust your file $WM_PROJECT_DIR/$FOAM_DOT_DIR/cshrc

setenv WM_NCOMPPROCS 2
)

Enjoy,

Martin

mplongjr · May 9, 2007, 12:28

Thanks Martin... that worked perfectly. I've been trying out some different optimizations with the pre-release GCC 4.2 and it really helps cutting the compile time down.

Mike

mattijs · May 15, 2007, 04:32

You can also distribute parallel builds. Works great on clusters. See the Wiki page about wmake.

May 8, 2007, 12:09	Hi all... I've been using Open	#1
mplongjr New Member Mike Long Join Date: Mar 2009 Location: Norman, OK, USA Posts: 8 Rep Power: 17	Hi all... I've been using OpenFOAM 1.3 for several months now and I've been very impressed with it's capabilities. In the 1.4 release notes, there is mention of a parallel build process with wmake, but I can't find any mention of how to initiate it. I naively tried ./Allwmake -j 2 .. but it didn't seem to use more than one process.. Is there something I'm missing?

May 8, 2007, 22:48	Mike, There is a new enviro	#2
mbeaudoin Senior Member Martin Beaudoin Join Date: Mar 2009 Posts: 332 Rep Power: 22	Mike, There is a new environment variable called $WM_NCOMPPROCS. Check out the file $WM_DIR/wmake for the details. The funny thing is: that variable is not initialized under OpenFOAM 1.4. Just add the following line to your $WM_PROJECT_DIR/$FOAM_DOT_DIR/bashrc export WM_NCOMPPROCS=2 Adjust the number to the number of processors you want to use for compiling. (For csh, adjust your file $WM_PROJECT_DIR/$FOAM_DOT_DIR/cshrc setenv WM_NCOMPPROCS 2 ) Enjoy, Martin lakeat and serles like this.

May 9, 2007, 12:28	Thanks Martin... that worked p	#3
mplongjr New Member Mike Long Join Date: Mar 2009 Location: Norman, OK, USA Posts: 8 Rep Power: 17	Thanks Martin... that worked perfectly. I've been trying out some different optimizations with the pre-release GCC 4.2 and it really helps cutting the compile time down. Mike

May 15, 2007, 04:32	You can also distribute parall	#4
mattijs Senior Member Mattijs Janssens Join Date: Mar 2009 Posts: 1,419 Rep Power: 26	You can also distribute parallel builds. Works great on clusters. See the Wiki page about wmake.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
OpenFOAM 15 icc build	mschoenberg	OpenFOAM Installation	4	October 2, 2008 01:09
How can I build OpenFOAM in cygwin	joywe	OpenFOAM Installation	10	September 12, 2008 10:39
Build OpenFOAM on MacOSX	Mauro Augelli (Augelli)	OpenFOAM Installation	101	July 21, 2008 07:42
OpenFOAM build from source instructions	tj22	OpenFOAM Installation	7	April 6, 2006 17:15
Build OpenFOAM on Tru64	francois	OpenFOAM Installation	18	April 4, 2006 06:45