Github user mpjlu commented on the issue:
https://github.com/apache/spark/pull/18551
hi @srowen , I understand Felix's point. I mean if you only have 1 task in
C/C++, and 2 CPUs, setting native BLAS to use 2 CPUs will be faster. But in JVM
env, even you only have one task, and 2 CPUs, but there is still some JVM
system threads, setting native BLAS to use 2 CPUs maybe not faster.
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