# OLCF Summit

If this is your first time building MFIX-Exa on OLCF’s Summit, please review the general notes below and Basics section first.

- To access Summit, you will need an OLCF account and an RSA token.

- The name of the MFIX-Exa account is `cfd122`

- These instructions build MFIX-Exa on the login nodes using `-j8` CPUs. You may have to decrease this value if there is high traffic or you may want to increase this value if you are on a compute node interactively.

- The cmake instructions compile to a `build` directory. The gmake instructions compile to a `exec` directory.

- For the dependencies, it is assumed that you have set the following environment variables:

      export HYPRE_INSTALL_DIR=$HOME/<path/to/my/hypre-install-dir>
      export CSG_INSTALL_DIR=$HOME/<path/to/my/csg-dep-install-dir>
      export CSG_LIB_DIR=$HOME/<path/to/my/csg-lib-install-dir>
      export ASCENT_INSTALL_DIR=$HOME/<path/to/my/ascent-install-dir>

  to a path that you have read/write access to. You will need to recall these paths later if you want to build MFIX-Exa with the optional dependencies.

- After building the `mfix` executable (with cmake), you can build the PIC-to-DEM restarter app by executing the following command in the `build` directory

      cmake --build . --target pic2dem

## Basics

### Source code

Before building, first obtain a copy of the source code following the instructions on the MFIX-Exa website.

### Modules

All of the build instructions below have been tested with the following modules

    module load cmake/3.23.2
    module load gcc/9.3.0

Do NOT purge your default modules. You do not need to load an MPI module, this is handled by the preloaded `spectrum-mpi` module. The GPU-enabled builds additionally require

    module load cuda/11.5.2

Full builds that utilize external dependencies, also require setting certain environment variables as discussed below.

## Building MFIX-Exa

The commands below are the superbuild instructions, i.e., AMReX is built as part of the MFIX-Exa build process. To build MFIX-Exa with hypre, csg and/or ascent dependencies, you first need to build and install these libraries and their dependencies. Instructions on building the necessary dependencies are below and should be successfully installed first. There are two primary methods of building the code `cmake` and `gmake` which are provided separately below.

### cmake

    cmake -DCMAKE_C_COMPILER=gcc \
          -DCMAKE_CXX_COMPILER=g++ \
          -DMFIX_MPI=yes \
          -DMFIX_OMP=no \
          -DMFIX_GPU_BACKEND=NONE \
          -DAMReX_TINY_PROFILE=no \
          -DMFIX_CSG=no \
          -DMFIX_HYPRE=no \
          -DCMAKE_BUILD_TYPE=Release \
          ../
    make -j8

    cmake -DCMAKE_C_COMPILER=gcc \
          -DCMAKE_CXX_COMPILER=g++ \
          -DMFIX_MPI=yes \
          -DMFIX_OMP=no \
          -DMFIX_CSG=no \
          -DMFIX_HYPRE=no \
          -DMFIX_GPU_BACKEND=CUDA \
          -DAMReX_CUDA_ARCH=7.0 \
          -DCMAKE_CUDA_ARCHITECTURES="70" \
          -DGPUS_PER_SOCKET=1 \
          -DGPUS_PER_NODE=2 \
          -DAMReX_TINY_PROFILE=no \
          -DCMAKE_BUILD_TYPE=Release \
          ../
    make -j8

    module load mpfr/4.0.2
    module load boost/1.77.0

    export HYPRE_DIR=$HYPRE_INSTALL_DIR
    export HYPRE_ROOT=$HYPRE_DIR
    export HYPRE_LIBRARIES=$HYPRE_DIR/lib
    export HYPRE_INCLUDE_DIRS=$HYPRE_DIR/include

    export ASCENT_DIR=$ASCENT_INSTALL_DIR
    export CONDUIT_DIR=$ASCENT_DIR
    export CMAKE_PREFIX_PATH=$CMAKE_PREFIX_PATH:$ASCENT_DIR/lib/cmake/ascent
    export CMAKE_PREFIX_PATH=$CMAKE_PREFIX_PATH:$ASCENT_DIR/lib/cmake/conduit

    export CSG_DIR=$CSG_INSTALL_DIR/csg-deps
    export CMAKE_PREFIX_PATH=$CMAKE_PREFIX_PATH:$CSG_DIR

    export BOOST_ROOT=$OLCF_BOOST_ROOT

    cmake -DCMAKE_C_COMPILER=gcc \
          -DCMAKE_CXX_COMPILER=g++ \
          -DMFIX_MPI=yes \
          -DMFIX_OMP=no \
          -DMFIX_CSG=yes \
          -DMFIX_HYPRE=yes \
          -DAMReX_ASCENT=yes \
          -DAMReX_CONDUIT=yes \
          -DMFIX_GPU_BACKEND=NONE \
          -DAMReX_TINY_PROFILE=no \
          -DCMAKE_BUILD_TYPE=Release \
          ../
    make -j8

    module load mpfr/4.0.2
    module load boost/1.77.0

    export HYPRE_DIR=$HYPRE_INSTALL_DIR
    export HYPRE_ROOT=$HYPRE_DIR
    export HYPRE_LIBRARIES=$HYPRE_DIR/lib
    export HYPRE_INCLUDE_DIRS=$HYPRE_DIR/include

    export ASCENT_DIR=$ASCENT_INSTALL_DIR
    export CONDUIT_DIR=$ASCENT_DIR
    export CMAKE_PREFIX_PATH=$CMAKE_PREFIX_PATH:$ASCENT_DIR/lib/cmake/ascent
    export CMAKE_PREFIX_PATH=$CMAKE_PREFIX_PATH:$ASCENT_DIR/lib/cmake/conduit

    export CSG_DIR=$CSG_INSTALL_DIR
    export CMAKE_PREFIX_PATH=$CMAKE_PREFIX_PATH:$CSG_DIR

    export BOOST_ROOT=$OLCF_BOOST_ROOT

    cmake -DCMAKE_C_COMPILER=gcc \
          -DCMAKE_CXX_COMPILER=g++ \
          -DBoost_INCLUDE_DIR="$BOOST_ROOT/include" \
          -DMFIX_MPI=yes \
          -DMFIX_OMP=no \
          -DMFIX_CSG=yes \
          -DMFIX_HYPRE=yes \
          -DAMReX_ASCENT=yes \
          -DAMReX_CONDUIT=yes \
          -DMFIX_GPU_BACKEND=CUDA \
          -DAMReX_CUDA_ARCH=7.0 \
          -DCMAKE_CUDA_ARCHITECTURES="70" \
          -DGPUS_PER_SOCKET=1 \
          -DGPUS_PER_NODE=2 \
          -DAMReX_TINY_PROFILE=no \
          -DCMAKE_BUILD_TYPE=Release \
          ../mfix
    make -j8

### gmake

    make -C exec -j8 \
         COMP=gnu \
         USE_MPI=TRUE \
         USE_OMP=FALSE \
         USE_CUDA=FALSE \
         USE_TINY_PROFILE=FALSE \
         USE_CSG=FALSE \
         USE_HYPRE=FALSE \
         DEBUG=FALSE

    make -C exec -j8
         COMP=gnu \
         USE_MPI=TRUE \
         USE_OMP=FALSE \
         USE_CUDA=TRUE \
         CUDA_ARCH=7.0 \
         USE_TINY_PROFILE=FALSE \
         USE_CSG=FALSE \
         USE_HYPRE=FALSE \
         DEBUG=FALSE

    module load mpfr/4.0.2
    module load boost/1.77.0

    export HYPRE_DIR=$HYPRE_INSTALL_DIR
    export HYPRE_HOME=$HYPRE_DIR

    export ASCENT_DIR=$ASCENT_INSTALL_DIR
    export CONDUIT_DIR=$ASCENT_DIR

    export CSGEB_HOME=$CSG_LIB_DIR
    export LDFLAGS="-lmpfr -L$CSG_INSTALL_DIR/lib -Wl,-rpath=$CSG_INSTALL_DIR"

    make -C exec -j8 \
         COMP=gnu \
         USE_MPI=TRUE \
         USE_OMP=FALSE \
         USE_CUDA=FALSE \
         USE_TINY_PROFILE=FALSE \
         USE_CSG=TRUE \
         USE_HYPRE=TRUE \
         USE_ASCENT=TRUE \
         USE_CONDUIT=TRUE \
         DEBUG=FALSE

    module load mpfr/4.0.2
    module load boost/1.77.0

    export HYPRE_DIR=$HYPRE_INSTALL_DIR
    export HYPRE_HOME=$HYPRE_DIR

    export ASCENT_DIR=$ASCENT_INSTALL_DIR
    export CONDUIT_DIR=$ASCENT_DIR

    export CSGEB_HOME=$CSG_LIB_DIR
    export LDFLAGS="-lmpfr -L$CSG_INSTALL_DIR/lib -Wl,-rpath=$CSG_INSTALL_DIR"

    make -C exec -j8 COMP=gnu \
         USE_MPI=TRUE \
         USE_OMP=FALSE \
         USE_CUDA=TRUE \
         CUDA_ARCH=7.0 \
         USE_TINY_PROFILE=FALSE \
         USE_CSG=TRUE \
         USE_HYPRE=TRUE \
         USE_ASCENT=TRUE \
         USE_CONDUIT=TRUE \
         DEBUG=FALSE

## Optional build dependencies

The following dependencies need to be built and installed prior to following any of the full build instructions above.

1. Set environment helpers

       export CC=$(which gcc)
       export CXX=$(which g++)
       export FC=$(which gfortran)
       mkdir $HOME/scratch && cd $HOME/scratch

Note

For whatever reason, building hypre with GPU support does not like this. So if you are building everything all at once, start with hypre with cuda and then set your compilers and build the rest (including hypre without cuda).

1. HYPRE

       git clone https://github.com/hypre-space/hypre.git
       pushd hypre/src/
       git checkout v2.26.0
       ./configure --prefix=$HYPRE_INSTALL_DIR --with-MPI
       make -j8 install
       popd

       git clone https://github.com/hypre-space/hypre.git
       pushd hypre/src/
       git checkout v2.26.0
       ./configure --prefix=$HYPRE_INSTALL_DIR \
                   --without-superlu \
                   --disable-bigint \
                   --without-openmp \
                   --enable-shared  \
                   --with-MPI \
                   --with-cuda \
                   --with-gpu-arch="70" \
                   --with-cuda-home=$OLCF_CUDA_ROOT \
                   --enable-cusparse \
                   --enable-curand
       make -j8 install
       popd

2. Catch2

       git clone --depth 1 --branch v2.13.7 https://github.com/catchorg/Catch2
       pushd Catch2/
       cmake -S . -B build -DCMAKE_INSTALL_PREFIX=$CSG_INSTALL_DIR
       cd build/
       make -j8 install
       popd

3. GMP

       wget --no-check-certificate https://ftp.gnu.org/gnu/gmp/gmp-6.2.1.tar.xz
       tar -xf gmp-6.2.1.tar.xz
       pushd gmp-6.2.1
       ./configure --prefix=$CSG_INSTALL_DIR
       make -j8 install
       popd

4. CGAL

       git clone --depth 1 --branch v5.3 https://github.com/CGAL/cgal
       pushd cgal/
       cmake -S . -B build -DCMAKE_INSTALL_PREFIX=$CSG_INSTALL_DIR
       cd build/
       make -j8 install
       popd

5. PEGTL

       git clone --branch 3.2.2 https://github.com/taocpp/PEGTL
       pushd PEGTL/
       cmake -S . -B build -DCMAKE_INSTALL_PREFIX=$CSG_INSTALL_DIR
       cd build/
       make -j8 install
       popd

6. CSG EB library (gmake)

   For the gmake install instructions, you need to install `libcsgeb` to `$CSG_LIB_DIR` using either cmake or gmake:

       cd subprojects/csg-eb

       module load boost/1.77.0
       export Boost_INCLUDE_DIR="-I$OLCF_BOOST_ROOT/include"

       export CSG_DIR=$CSG_INSTALL_DIR
       export CMAKE_PREFIX_PATH=$CMAKE_PREFIX_PATH:$CSG_DIR

       cmake -S . -B build -DCMAKE_INSTALL_PREFIX=$CSG_LIB_DIR \
             -DCMAKE_BUILD_TYPE="Release"
       cd build
       make -j8 install

       export CSG_DIR=$CSG_INSTALL_DIR

       make -C subprojects/csg-eb install DESTDIR=$CSG_LIB_DIR \
       BOOST_HOME=$OLCF_BOOST_ROOT \
       PEGTL_HOME=$CSG_DIR \
       CGAL_HOME=$CSG_DIR \
       CATCH2_HOME=$CSG_DIR \
       ENABLE_CGAL=TRUE

7. Conduit

       git clone --recursive https://github.com/LLNL/conduit.git
       pushd conduit/
       git checkout v0.8.6
       mkdir build && cd build
       cmake -S ../src -DCMAKE_INSTALL_PREFIX=$ASCENT_INSTALL_DIR \
             -DCMAKE_BUILD_TYPE=Release \
             -DENABLE_OPENMP=OFF \
             -DENABLE_MPI=ON \
             -DENABLE_CUDA=OFF \
             -DCMAKE_C_COMPILER=$(which gcc) \
             -DCMAKE_CXX_COMPILER=$(which g++)
       make -j8 install
       popd

8. Vtk-m

       git clone --branch master https://gitlab.kitware.com/vtk/vtk-m.git
       pushd vtk-m/
       git checkout v1.9.0
       mkdir build && cd build/
       cmake -S ../ -DCMAKE_INSTALL_PREFIX=$ASCENT_INSTALL_DIR \
             -DCMAKE_BUILD_TYPE=Release \
             -DVTKm_ENABLE_OPENMP=OFF \
             -DVTKm_ENABLE_MPI=ON \
             -DVTKm_ENABLE_CUDA=OFF \
             -DVTKm_USE_64BIT_IDS=OFF \
             -DVTKm_USE_DOUBLE_PRECISION=ON \
             -DVTKm_USE_DEFAULT_TYPES_FOR_ASCENT=ON \
             -DVTKm_NO_DEPRECATED_VIRTUAL=ON
       make -j8 install
       popd

9. Ascent

       git clone --recursive https://github.com/Alpine-DAV/ascent.git
       pushd ascent
       git checkout v0.9.0
       mkdir build && cd build/
       cmake -S ../src -DCMAKE_INSTALL_PREFIX=$ASCENT_INSTALL_DIR \
             -DCMAKE_BUILD_TYPE=Release \
             -DCONDUIT_DIR=$ASCENT_INSTALL_DIR \
             -DVTKM_DIR=$ASCENT_INSTALL_DIR \
             -DENABLE_VTKH=ON \
             -DENABLE_FORTRAN=OFF \
             -DENABLE_PYTHON=OFF \
             -DENABLE_DOCS=OFF \
             -DBUILD_SHARED_LIBS=ON
       make -j8 install
       popd

## Running Jobs

Common Slurm commands:

- `bsub runit_cpu.sh` submit a cpu job to the queue

- `bjobs -u USER` check job status of user USER

- `bkill JOBID` kill a job with id JOBID

- `bsub -W 0:20 -nnodes 1 -P <ALLOC>` grab a node interactively for 20 minutes

Example run scripts for GPU is below. For CPU-only, you remove `module load cuda`, set `--gpu_per_rs 0` and remove `--bind packed:1` from the run line.

    #!/bin/bash
    #BSUB -P CFD122
    #BSUB -W 00:20
    #BSUB -nnodes 2
    #BSUB -J MFIX
    #BSUB -o MFIXo.%J
    #BSUB -e MFIXe.%J
    module load gcc/9.3.0
    module load cuda/11.5.2
    module load mpfr/4.0.2
    module load boost/1.77.0
    module list
    set -x
    omp=1
    export OMP_NUM_THREADS=${omp}

    jsrun --nrs 12 --tasks_per_rs 1 --cpu_per_rs 1 --gpu_per_rs 1 --launch_distribution packed --bind packed:1 ./mfix inputs > screen.txt