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Hunting for nondeterminism in our tools #209

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PeterMatula opened this issue Feb 8, 2018 · 1 comment
Open

Hunting for nondeterminism in our tools #209

PeterMatula opened this issue Feb 8, 2018 · 1 comment
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C-tests Q-discussion T-nondeterminism

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@PeterMatula
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From time to time, we notice nondeterminism in some of our tools. We try to fix it once it is identified. It would be nice to be able to automatically and periodically test for it. We should ideally test:

  • Diffs in several runs of the same build.
  • Diffs in runs of different builds (compilers, options, etc.).
  • Diffs in runs on different systems (Linux/Windows).
    Moreover, there might be some inherent nondeterminisms - time stamps, absolute paths, etc.

Right now, I have no idea how to do something like this. If anyone have any suggestion, please comment.
@s3rvac s3rvac mentioned this issue Apr 1, 2018
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PeterMatula added a commit to avast/retdec-regression-tests that referenced this issue Aug 23, 2018
@PeterMatula
disable 2 tests on macos
93f9d66 
They are timeouting after 1200 seconds. It looks like there is some nondeterminism going on, because one of them (my-printf-decompilation-quality) did successfully run (once) when run manually on macOS server. There are slight differences between *.ll produces on macOS server and my Linux. Related to avast/retdec#209.
@PeterMatula PeterMatula mentioned this issue Aug 27, 2018
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@PeterMatula
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PeterMatula commented Sep 12, 2018 •
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Commits disabling regression tests on macOS due to non-determinism:

Enable these when solved.

@s3rvac s3rvac mentioned this issue Jan 30, 2019
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@s3rvac s3rvac mentioned this issue Feb 13, 2019
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@PeterMatula