OpenBLAS hangs in

[Victor Rodriguez]

Hi 

I am building R using OpenBLAS and it has a great performance (thank you) . However when I run Rbenchmark [1]

the system hangs when threads > 66 (export OPENBLAS_NUM_THREADS=66). With less the test performs correctly

Is this a known issue ? Or am I missing some configuration flag: 

	make TARGET=SANDYBRIDGE F_COMPILER=GFORTRAN SHARED=1 DYNAMIC_THREADS=1 NUM_THREADS=128 %{?_smp_mflags} 

[1] https://github.com/jtalbot/riposte/blob/master/benchmarks/other/R-benchmark-25.R