I'm running Parallel Studio XE 2019 Update 3, and I've got the problem where, when I run a program compiled using MPI, the number of CPUs is always set to 1. It runs, but only on 1 CPU. (It also starts separate instances of the same code on the other CPUs, but the others crash because they don't get the input file.) This is a mixed Fortran, C++ code, but the MPI part is called from the C++ portion, so I think this is the correct forum. The code is run on the same computer I compiled it, with the command
mpirun -n 4 mycode < sphere.inp > sphere.out
This is a large code that has worked correctly on a different linux (maybe unix) system, when compiled using Intel Composer XE 2013. That had some additional flags that I don't think are relevant, but I give the command below:
mpirun --bind-to-core --cpus-per-proc 1 -np 8 mycode -lmpi -lmpi < sphere.inp > sphere.out
Adding -lmpi once when I run it on the new system doesn't change the behavior. If I add it twice, the code doesn't run at all. The --bind-to-core --cpus-per-proc flags aren't recognized on the new system.
Running which -a mpirun gives four identical lines (I guess because of the duplicated lines in my path, see below), but no other version of mpirun.
/opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/bin/mpirun
/opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/bin/mpirun
/opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/bin/mpirun
/opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/bin/mpirun
I've searched, and the answers given online always seem to be that there's another version of mpirun, but I'm not sure how that is. This is on a brand new install of Centos 7 (build 1810, so I think that's 7.6), made just so I can install Parallel Studio XE and compile this code. I don't think there's another MPI version that comes with Centos by default. And the which command doesn't show any other version.
Anyone got any ideas that I can try?
My .bashrc is given below, followed by my PATH.
# .bashrc
# Source global definitions
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi
# User specific environment and startup programs
#
# Add my personal bin directory.
#
PATH=$PATH:$HOME/bin
export PATH
source /opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/bin/mpivars.sh
source /opt/intel/compilers_and_libraries_2019/linux/bin/compilervars.sh intel64
Here's my path, with line returns added for clarity. (Yes, some directories are listed two to four times. I don't know why that is, but I don't think that will matter.)
/opt/intel/compilers_and_libraries_2019.3.199/linux/bin/intel64:
/opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/libfabric/bin:
/opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/bin:
/opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/libfabric/bin:
/opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/bin:
/opt/intel/compilers_and_libraries_2019.3.199/linux/bin/intel64:
/opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/libfabric/bin:
/opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/bin:
/opt/intel/debugger_2019/gdb/intel64/bin:
/opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/libfabric/bin:
/opt/intel/compilers_and_libraries_2019.3.199/linux/mpi/intel64/bin:
/usr/lib64/qt-3.3/bin:
/usr/local/bin:
/usr/local/sbin:
/usr/bin:
/usr/sbin:
/bin:
/sbin:
/home/zenbeam/bin:
/home/zenbeam/bin
