Andreas Marek authored
It turned out that users ignored the warnings of the test programs if their MPI library did not provide "MPI_THREAD_SERIALIED" or "MPI_THREAD_MULTIPLE". Thus for safty reasons, ELPA does from now on during the call to "elpa_setup" check the provided threading level of the MPI library. If the provided level is too low, ELPA will do the following - limit the number of OpenMP threads **internal** to ELPA to 1 - print a warning about this - ignore the settings of the user via -- the OMP_NUM_THREADS variable -- calling the set-method set("omp_threads", value) These settings will **not** affect the run-time of a threaded blas and lapack library, **if** the number of threads for these libraries can be controlled independently of the OMP_NUM_THREADS variable (for example for Intel's MKL one can use MKL_NUM_THREADS)82ad3340
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