GotoBLAS2 with multiple cores

Your report sounds somewhat similar to problems I encountered with OpenBLAS on Ubuntu Linux (which is a maintained version of GotoBLAS; I couldn't get the latter to compile properly).

OpenBLAS uses OpenMP for parallelization.  Once linked into R, other OpenMP-based code would only use a single core any more. I have never used foreach, but I can imagine that something similar might be going on.

The workaround I found was to compile OpenBLAS with the setting NO_AFFINITY=1.  In addition, if you're running parallel code, I'd very much recommend to limit the number of threads within each parallel process by setting the OMP_NUM_THREADS environment variable (or in some other way).

Hope this helps,
Stefan

So, is it possible to use many cores at the same time with GotoBLAS2, do
you have any ideas?