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goto_num_threads
2010 Aug 19
1
Can you share a working example of R program aided by fast BLAS?
...compatible with MPI.
This latter point not clearly stated in the GotoBLAS2 documents, so
far as I can find, but after I realized that was the problem, I did
find one other cluster website that mentioned the same problem. "If
your application uses GotoBLAS and all cores as MPI threads, setting
GOTO_NUM_THREADS larger than one will usually result in drastically
slower performance."
(http://hpc.uark.edu/hpc/support/software/numerical.html#gotoblas).
In the GotoBLAS2 documentation, it warns of weird thread related
delays, but it implies that the slowdown--if it happens--is a result
of bad user code, r...