[3.12] gh-109974: Fix threading lock_tests race conditions (#110057) #110346
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vstinner
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Oct 4, 2023
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vstinner
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- Issue: test_threading: test_set_and_clear() failed on Windows x64 #109974
) Fix race conditions in test_threading lock tests. Wait until a condition is met rather than using time.sleep() with a hardcoded number of seconds. * Replace sleeping loops with support.sleeping_retry() which raises an exception on timeout. * Add wait_threads_blocked(nthread) which computes a sleep depending on the number of threads. Remove _wait() function. * test_set_and_clear(): use a way longer Event.wait() timeout. * BarrierTests.test_repr(): wait until the 2 threads are waiting for the barrier. Use a way longer timeout for Barrier.wait() timeout. * test_thread_leak() no longer needs to count len(threading.enumerate()): Bunch uses threading_helper.wait_threads_exit() internally which does it in wait_for_finished(). * Add BaseLockTests.wait_phase() which implements a timeout. test_reacquire() and test_recursion_count() use wait_phase(). (cherry picked from commit 4e356ad)
…n#110089) * Add context manager on Bunch class. * Bunch now catchs exceptions on executed functions and re-raise them at __exit__() as an ExceptionGroup. * Rewrite BarrierProxy.test_default_timeout(). Use a single thread. Only check that barrier.wait() blocks for at least default timeout seconds. * test_with(): inline _with() function. (cherry picked from commit 743e357)
vstinner
requested review from
brettcannon,
encukou,
ericsnowcurrently,
ncoghlan and
warsaw
as code owners
This was referenced Oct 4, 2023
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Thanks @vstinner for the PR 🌮🎉.. I'm working now to backport this PR to: 3.11. |
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Sorry, @vstinner, I could not cleanly backport this to |
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GH-110355 is a backport of this pull request to the 3.11 branch. |
vstinner
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Oct 4, 2023
…110355) [3.12] gh-109974: Fix threading lock_tests race conditions (#110057) (#110346) * gh-109974: Fix threading lock_tests race conditions (#110057) Fix race conditions in test_threading lock tests. Wait until a condition is met rather than using time.sleep() with a hardcoded number of seconds. * Replace sleeping loops with support.sleeping_retry() which raises an exception on timeout. * Add wait_threads_blocked(nthread) which computes a sleep depending on the number of threads. Remove _wait() function. * test_set_and_clear(): use a way longer Event.wait() timeout. * BarrierTests.test_repr(): wait until the 2 threads are waiting for the barrier. Use a way longer timeout for Barrier.wait() timeout. * test_thread_leak() no longer needs to count len(threading.enumerate()): Bunch uses threading_helper.wait_threads_exit() internally which does it in wait_for_finished(). * Add BaseLockTests.wait_phase() which implements a timeout. test_reacquire() and test_recursion_count() use wait_phase(). (cherry picked from commit 4e356ad) * gh-109974: Fix more threading lock_tests race conditions (#110089) * Add context manager on Bunch class. * Bunch now catchs exceptions on executed functions and re-raise them at __exit__() as an ExceptionGroup. * Rewrite BarrierProxy.test_default_timeout(). Use a single thread. Only check that barrier.wait() blocks for at least default timeout seconds. * test_with(): inline _with() function. (cherry picked from commit 743e357) (cherry picked from commit 1d032ea)
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