open mpi安装

The following instructions will help you installing OpenMPI on your machine. It takes about 5-10min.

Create a temporary directory for compiling OpenMPI. You can do this in a terminal by typing
mkdir $HOME/built/src
Download openmpi-4.1.5.tar.bz2 from http://www.open-mpi.org
Move the openmpi-4.1.5.tar.bz2 to the directory just created:
mv $HOME/Downloads/openmpi-4.1.5.tar.bz2 $HOME/built/src/
Change to the directory and extract the package using
cd $HOME/built/src
tar -jxf openmpi-4.1.5.tar.bz2
如果是.tar.gz的话
tar -zxvf openmpi-4.1.5.tar.gz
Go into the source directory
cd openmpi-4.1.5
Configure, compile and install by executing the following commands
./configure –prefix=$HOME/local/openmpi-4.1.5
make all -j && make install
This will install OpenMPI in your home directory in the $HOME/local/openmpi-4.1.5/
Remove the temporary directories:
rm $HOME/built/src/openmpi-4.1.5.tar.bz2
rm -r $HOME/built/src/openmpi-4.1.5
To use MPI you will have to adapt your PATH and LD_LIBRARY_PATH environment variable:
echo “export PATH=$PATH:$HOME/local/openmpi-4.1.5/bin” >> $HOME/.bashrc
echo “export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$HOME/local/openmpi-4.1.5/lib” \

$HOME/.bashrc
This appends the two lines to your .bashrc file which is executed when starting a terminal session.
或者vim ~/.bashrc然后添加

export PATH=$PATH:$HOME/local/openmpi-4.1.5/bin
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$HOME/local/openmpi-4.1.5/lib

To compile your MPI C++ programs you have to use mpicxx with the same arguments as you would use for g++. To run a program PRG with N MPI processes, you would then use mpirun -np N PRG.
To uninstall OpenMPI just delete the folder opt/openmpi in your home directory and remove the last two lines from the .bashrc file in your home directory.

You can find more information on http://www.open-mpi.org