On 1/23/21 4:39 PM, Rolf Eike Beer wrote: > The Python testsuite in all versions of Python3 I remember fails the eintr > tests with output like this: > > FAIL: test_poll (__main__.SelectEINTRTest) > ---------------------------------------------------------------------- > Traceback (most recent call last): > File "/usr/lib/python3.9/test/eintrdata/eintr_tester.py", line 451, in > test_poll > self.assertGreaterEqual(dt, self.sleep_time) > AssertionError: 0.19999999995343387 not greater than or equal to 0.2 There have been some changes in the generic timekeeping functions. I see timing issues on a few of my machines too, e.g. in the xor time measurement functions as reported at lkml. Sadly I don't have time right now to look deeper into this. Helge > There are 2 more failing tests with likewise output. This happens on my 4-core > C8000. I have attached the testcase, when running it with "python3 > test_eintr.py" I also get that results. > > I suspect this could be some cross-cpu clock scew, but of course it can be > something entirely different. Could someone have a look what is up there? > Kernel is currently 5.10.4, but this has been there for a while. > > Eike >
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