Table of Contents

tl;dr #

Put the following in your .bashrc

use_build() {
  if hostname | grep summit &>/dev/null; then
      echo "loading crusher spack"
      module swap PrgEnv-cray PrgEnv-gnu
      module load craype-accel-amd-gfx90a
      module load rocm
      export clustername=crusher
  fi
  #other OLCF Machines
  export SPACK_USER_CONFIG_PATH="$HOME/.spack/$clustername"
  export SPACK_USER_CACHE_PATH="$SPACK_USER_CONFIG_PATH"
  source $HOME/git/spack-crusher/share/spack/setup-env.sh
  source $HOME/git/spack-crusher/share/spack/spack-completion.bash
}

Then run

mkdir -p ~/git
git clone https://github.com/spack/spack git/spack-crusher
source ~/.bashrc
spack compiler find

First create packages.yaml at ~/.spack/crusher/packages.yaml with:

  cmake:
    externals:
    - spec: cmake@3.17.0
      prefix: /usr
  all:
    providers:
      mpi: [cray-mpich]
  hdf5:
    externals:
    - spec: hdf5@1.12.2+mpi+shared+hl
      prefix: /opt/cray/pe/hdf5-parallel/1.12.1.5/gnu/9.1
    buildable: False
  cray-mpich:
    externals:
    - spec: cray-mpich@8.1.16
      modules: [cray-mpich/8.1.16, libfabric/1.15.0.0, craype-accel-amd-gfx90a, rocm/5.1.0]
    buildable: false

After that create compilers.yaml at ~/.spack/crusher/cray/compilers.yaml with:

compilers:
- compiler:
    spec: gcc@12.1.0
    paths:
      cc: cc
      cxx: CC
      f77: ftn
      fc: ftn
    flags: {}
    operating_system: sles15
    target: any
    modules:
    - PrgEnv-gnu
    - gcc/12.1.0
    - cray-mpich/8.1.16
    - craype-accel-amd-gfx90a
    - rocm/5.1.0
    environment:
      set:
        PE_MPICH_GTL_DIR_amd_gfx90a: "-L/opt/cray/pe/mpich/8.1.16/gtl/lib"
        PE_MPICH_GTL_LIBS_amd_gfx90a: "-lmpi_gtl_hsa"

And now spack should work. On your next login, just call use_build to reload spack.

For the longer version see the guide on [configuring spack]({% link _guides/spack.markdown %})

What makes this machine special? #

Crusher’s module system seems to be more picky than most needing a rocm and craype-accel to be present for most uses. We provide these. There are also some magic environment variables that the OLCF docs said to add to the environment.
We use Cray’s provided MPI and HDF5 to get the most oout of the platform.
We load a GNU compiler from a module because it seems to work most reliably
Crusher shares a home filesystem with other machines like Summit these machines are completely different hardware wise and use different module systems. The load function loads a copy of spack specifically for Crusher and uses a separate spark instance for other machines. We use spack’s SPACK_USER_CONFIG_PATH to keep these cleanly separate.

Changelog #

2022-10-26 created this document