Kokkos Variant Checksum Differences
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Description
Some kokkos variants produce a checksum that is significantly different than the other variants.
I compiled with mvapich 2.3.7 gcc 11.2.1 and ran with 36 ranks.
The difference between checksums should be negligible, less than 1e-10. This is printed in the RAJAPerf-checksum.txt output file.
Affected kernels:
- Basic_ARRAY_OF_PTRS
- Basic_PI_ATOMIC
- Basic_REDUCE3_INT
- Apps_NODAL_ACCUMULATION_3D
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the checksum comparison with the reported MVAPICH 2.3.7, GCC 11.2.1, and 36-rank setup, then inspect RAJAPerf-checksum.txt for the listed affected kernels. Done means determining why the Kokkos variants differ and bringing their checksum differences below 1e-10.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 38/100