Public bug reported: There is a threading problem with openblas that causes it to interact poorly with python-numpy and probably several other linear algebra packages. The bug manifests itself by having all your cores peg to 100% utilization prior to completely freezing python.
The bug and it's cause are explained in some detail below. Note that there are some compiler flag changes that could make this issue go away. Also in this link is some test code. https://github.com/xianyi/OpenBLAS/issues/294 What is notable is that the bug seems to manifest itself saucy but did not do so in raring. The implication is that there was a change in compile flags or versions that has exposed this defect. It might be a simple fix in how openblas is compiled. I'm not certain if a fix on the python side is practical. ** Affects: openblas (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1262523 Title: Openblas freezes with heavy numpy usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openblas/+bug/1262523/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
