If you observe https://koschei.fedoraproject.org/package/scipy?collection=f33 you will see that ppc64le fails a lot. With Python 3.9, I got ~600 test failures (~2% of collected tests). I've ended up pushing https://src.fedoraproject.org/rpms/scipy/c/3b286e1db7d0f46092207e6ac122ac19e7bd7a6a?branch=master as a dirty workaround. I've opened this to track the workaround, so we can eventually drop it. I have not analyzed the failures. Side note: s390x tests are disabled entirely.
This bug appears to have been reported against 'rawhide' during the Fedora 33 development cycle. Changing version to 33.
An update on this. With scipy 1.5.2, there are no failures on ppc64le, even with all the workarounds disabled. There is a single failure on armv7hl, which I'm currently investigating, and 11 failures on s390x (that's 0.03%, so I'm thinking about dropping the acceptable_failure_rate patch entirely).
Note that the latest build on rawhide n Koji (Fedora 34, scipy-1.5.0-4.fc34) has: s390x: tests entirely skipped armv7hl: 1 failed i686: 2 failed all others (incl. ppc64le): all passed (Fedora 33 has similar results.) So this is not actually blocked on 1.5.2 but it has somehow gone away naturally.
I rebased scipy to 1.5.2, took care of the 2 tests failing (under right circumstainces) on 32-bit architectures, and explicitly disabled those 11 tests failing on s390x. I'll try to fix those and keep this bugzilla open to track the progress.
Thanks!
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A lot of test failures have been resolved in scipy 1.8.0, only 3 remain to be fixed, but only 2 are s390x specific.
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