llnl / llnl/ExaCA

Temperature unit test hang with multiple threads and ranks

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#279 2 comments 0 reactions 0 assignees View on GitHub

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bug
Dominant language
C++
Stars
96
Forks
29
Avg merge
3d 3h
Merged PRs (30d)
1

Description

`ExaCA_Temperature_test_OPENMP_np_2_nt_2` failure - only seen once, but probably indicates an unlikely race condition

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the `ExaCA_Temperature_test_OPENMP_np_2_nt_2` test and try to reproduce the reported hang using multiple threads and ranks. Inspect the test and its failure behavior to identify whether a race is involved; done means the test runs reliably without hanging and any confirmed race is addressed.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
hpc, testing-qa
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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