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TROUBLESHOOTING.md

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Troubleshooting

  • Q: What kind of compilers do I need?
  • A: Usually the Linux system would come with gcc compilers, however, you might need to install gfortran:

sudo apt-get install gfortran

  • Q: I am not sure if my machine is installed with OpenMPI. How could I check?
  • A: Use following commands in terminal to check the installed version of OpenMPI and compilers.
mpicxx --showme:version
mpicc --showme:version
mpif90 --showme:version

which mpicc
export MPICXX=path-to-cxx-compiler-wrapper
  • Q: How to find LAPACK/BLAS path?
  • A: Use following commands in terminal to check the installed path,
dpkg -L liblapack3
dpkg -L libblas-dev

You need to locate the liblapack.so and libblas.so files (or so.3 files ). If you cannot find it in terminal, use GUI search function.

  • Q: What bash command should I type?
  • A: A typical bash command for setting up installation environment is
export MPICC=/usr/bin/mpicc
export MPICXX=/usr/bin/mpicxx
export MPIF90=/usr/bin/mpif90
export MPIRUN=/usr/bin/mpirun
export BLAS_LIB=/usr/lib/x86_64-linux-gnu/libblas.so
export LAPACK_LIB=/usr/lib/x86_64-linux-gnu/liblapack.so
export GPTUNEROOT=~/GPTune
  • Q: Why the pip does not work, or install into a wrong version of python?
  • A: Use sudo python -m pip to replace pip with the correction version of python. python --version gives you the version of python in use. If you must use pip and encounter permission denied error, try sudo pip instead.
  • Q: I get cannot import name '_imaging' from 'PIL' error.
  • A: Most likely you do not have the up-to-date version of Pillow, uninstall all versions of Pillow using sudo pip uninstall Pillow until there are none left (use pip list to check), then sudo pip install Pillow will give you the up-to-date version.
  • Q: I get ModuleNotFoundError: No module named 'gptune'
  • A: This may occur when you run an old version of example provided. You may try following import syntax in your .py header, BEFORE anything else.
import sys
import os
import mpi4py
#import logging
sys.path.insert(0, os.path.abspath(__file__ + "/../../GPTune/"))
sys.path.insert(0, os.path.abspath(__file__ + "/../scalapack-driver/spt/"))

Also try to export following environment variables.

export PYTHONPATH=$PYTHONPATH:$PWD/autotune/  
export PYTHONPATH=$PYTHONPATH:$PWD/scikit-optimize/  
export PYTHONPATH=$PYTHONPATH:$PWD/mpi4py/  
export PYTHONPATH=$PYTHONPATH:$PWD/GPTune/  
export PYTHONPATH=$PYTHONPATH:$PWD/examples/scalapack-driver/spt/  
export PYTHONWARNINGS=ignore