On 01/28/2017 01:11 AM, Janne Blomqvist wrote: ... snip ... >> I am doubtful LAPACK is thread safe. I think you need to force single thread >> through execution of those functions. > > Since LAPACK 3.3, all routines are thread safe: > http://www.netlib.org/lapack/lapack-3.3.0.html > Thanks Janne for this clarification. Jerry