[3.11] gh-102795: Fix use of poll in test_epoll's test_control_and_wait (GH-102796) #104173
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pythonGH-102796) This test can fail unnecessarily. In the test we wait for events on two file descriptors. This is done in a single call to select.epoll's poll() function. However, it is valid for the OS to return only one event via poll() and the next via a subsequent call to poll(). This rarely happens, but it can cause the test to fail despite properly functioning polling. Instead, we poll a second time when necessary. (cherry picked from commit c9ecd3e) Co-authored-by: Kevin Krakauer <kevinGC@users.noreply.github.com>
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Oh, Python 3.11 tets.support doesn't have busy_wait(). I added it to Python 3.12. I don't think that this very specific test enhancement is needed for 3.11. It's an old test. |
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This test can fail unnecessarily. In the test we wait for events on two
file descriptors. This is done in a single call to select.epoll's poll()
function. However, it is valid for the OS to return only one event via
poll() and the next via a subsequent call to poll(). This rarely
happens, but it can cause the test to fail despite properly functioning
polling.
Instead, we poll a second time when necessary.
(cherry picked from commit c9ecd3e)
Co-authored-by: Kevin Krakauer kevinGC@users.noreply.github.com