I appreciate the value of the feature - but it's possible the test doesn't pull its weight. Is the code that implements the feature liable to failure/often touched? If it's pretty static/failure is unlikely, possibly the time and flaky failures aren't worth the value of possibly catching a low-chance bug.
Another option might be to reduce how often/in which configurations the test is run - LLVM_ENABLE_EXPENSIVE_CHECKS presumably only works for code within LLVM itself, and not test cases - but maybe I'm wrong there & this parameter could be used (& then the timing bumped up quite a bit to try to make it much more reliable), or something similar could be implemented at the lit check level? Ah, compiler-rt tests use EXPENSIVE_CHECKS to disable certain tests: ./compiler-rt/test/lit.common.configured.in:set_default("expensive_checks", @LLVM_ENABLE_EXPENSIVE_CHECKS_PYBOOL@) ./compiler-rt/test/fuzzer/large.test:UNSUPPORTED: expensive_checks Could you bump the timeouts a fair bit and disable the tests except under expensive checks? On Wed, Sep 16, 2020 at 9:31 PM Dan Liew <d...@su-root.co.uk> wrote: > > Hi David, > > Unfortunately writing a reliable test is tricky given that the > functionality we're trying to test involves timing. I would advise > against disabling the test entirely because it actually tests > functionality that people use. I'd suggest bumping up the time limits. > This is what I've done in the past. See > > commit 6dfcc78364fa3e8104d6e6634733863eb0bf4be8 > Author: Dan Liew <d...@su-root.co.uk> > Date: Tue May 22 15:06:29 2018 +0000 > > [lit] Try to make `shtest-timeout.py` test more reliable by using a > larger timeout value. This really isn't very good because it will > still be susceptible to machine performance. > > While we are here also fix a bug in validation of > `maxIndividualTestTime` where previously it wasn't checked if the > type was an int. > > rdar://problem/40221572 > > llvm-svn: 332987 > > HTH, > Dan. > > On Wed, 16 Sep 2020 at 09:37, David Blaikie <dblai...@gmail.com> wrote: > > > > Ping on this > > > > On Wed, Sep 9, 2020 at 8:27 PM David Blaikie <dblai...@gmail.com> wrote: > > > > > > The clang-cmake-armv8-lld (linaro-toolchain owners) buildbot is timing > > > out trying to run some timeout tests (Dan Liew author): > > > > > > Pass: http://lab.llvm.org:8011/builders/clang-cmake-armv8-lld/builds/5672 > > > Fail: http://lab.llvm.org:8011/builders/clang-cmake-armv8-lld/builds/5673 > > > > > > Is there anything we can do to the buildbot? Or the tests? (bump up the > > > time limits or maybe remove the tests as unreliable?) _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain