Github user mpjlu commented on the issue:
https://github.com/apache/spark/pull/18551
hi @felixcheung , I have tested one case, write a single thread java
program, and call native blas. The performance is much better to disable native
blas multi-threading (the total program performance). This is because JVM
itself is multi-threading.
For JVM env, maybe we cannot set "the number of core assigned to Spark and
number of threads to native BLAS add up to the total number of CPU core
available on the worker". I didn't do enough test for this.
Thanks.
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