Telcon: 2023 10 18

Wednesday October 18th, 9am PT (UTC -7:00)

Attendees

• Peter Scheibel (host)
• Mark Krentel
• Brian Van Essen
• Prentice Bisbal
• Phil Regier
• Yang Liu
• Richarda Butler
• Tammy Dahlgren
• Pranav Sivaraman

Agenda

This meeting is for Q&A: there are no pre-planned general topics.

• Prentice: is there a way to tell Spack "build openmpi for each compiler I have"?
  • This is possible with an environment using matrices
  • https://spack.readthedocs.io/en/latest/environments.html#spec-matrices
  • Overall strategy:
    • Create one env for the cluster
    • In etc profile script
    • Want to use lmod modules, not activate the env
      • This works: spack can generate module files for packages installed in an env
      • Don't have to activate the env to use the modules
• Prentice: building hierarchies
  • Issue creating modules for oneapi-compilers
  • They go below gcc (because they were installed with gcc)
  • Loading oneapi-compiler module, not seeing any other packages
  • Want to be able to load oneapi-compiler (to run the compiler binaries) and also load modules for packages built with oneapi
  • Don't see packages built with oneapi under the oneapi component of the hierarchy
  • https://spack.readthedocs.io/en/latest/module_file_support.html

modules:
  default:
    enable:
      - lmod
    lmod:
      core_compilers:
        - 'gcc@4.8'

• Prentice: want to rebuild packages with different compilers
  • amd-aocl package was concretized with %aocc but all its dependencies are concretized with aocl%gcc
  • concretizer:reuse:false
  • If you use env matrices and above setting, you should get a hierarchy for each compiler
• Pranav: building cuda_arch when building packages
  • OpenMP offload + cuda
  • Spack allows these to be done together, but they should be exclusive
  • In particular if you want to set cuda_arch for offload, right now spack requires +cuda when cuda_arch=...
  • Related: desire to have GPU as part of arch: https://github.com/spack/spack/issues/31581
  • For now: adding compiler flags to enable openmp offload
  • Desire: +sycl variant consistent across packages
• Yang: installing package that prompts user for installation location
  • hangs at prompt
  • You can provide an answer file, but it needs to be redirected to stdin when running the script
    • spack doesn't have a way to do that
      • actually: can you set input= when invoking the executable
      • open the answer file (in python)