Matthew Brett <matthew.br...@gmail.com> wrote: > Is it possible this is related to: > > https://github.com/numpy/numpy/issues/4007
Possibly, but it seems to be in _dotblas which uses cblas. NumPy has its own cblas.h. Perhaps it conflicts with Apple's? Apple's documentation says that cblas_sdot returns float, but knowing Apple this might not be accurate. OK, time to locate cblas.h on my MacBook... > or even: > > https://github.com/numpy/numpy/issues/4776 No. This happens because Accelerate and GCD are not designed to be fork-safe. One can argue that this bug is actually in multiprocessing and not in NumPy or Accelerate, since BLAS is not a part of POSIX. Only POSIX functions are required to be fork safe. Python 3.4 has a fix for it by allowing spawn (fork+exec) to be used instead of fork. It will never be fixed on Python 2.7 unless someone backports multiprocessing from Python 3.4. BTW: GotoBLAS2 is also affected by this problem, not just Accelerate. MKL and Atlas are safe, and so is OpenBLAS from master at GitHub. Sturla _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
