Author db3l
Recipients db3l, neologix, python-dev, skrah, vstinner
Date 2019-04-26.22:07:11
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Message-id <1556316431.7.0.81818722244.issue11871@roundup.psfhosted.org>
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I should mention that a high level of test parallelism on the part of my worker might have be a contributing factor in this most recent case.

The worker was recently upgraded to a faster 4-core VM, but with limited I/O.  In a test run the test processes invariably end up stuck on I/O heavy tests, idling the CPUs.

So I've been running the tests under -j8, as I found it the most effective combination of supporting tests stuck on I/O while keeping the CPUs busy, but it does mean that in some cases there's a lot pending on the CPUs, and depending on the exact test ordering in a run presumably some more sensitive tests could be impacted.

I have in fact seen an increase in random tests generating warnings (fail, then pass) than the worker had previously.  I suspect the benefits of the extra parallelism on total test time (-j8 is about 20% faster than -j4) probably isn't valuable enough and will most likely be reducing it a bit.
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Date User Action Args
2019-04-26 22:07:11db3lsetrecipients: + db3l, vstinner, skrah, neologix, python-dev
2019-04-26 22:07:11db3lsetmessageid: <1556316431.7.0.81818722244.issue11871@roundup.psfhosted.org>
2019-04-26 22:07:11db3llinkissue11871 messages
2019-04-26 22:07:11db3lcreate