GitHub user mpjlu opened a pull request:
https://github.com/apache/spark/pull/18551
[SPARK-21305][ML][MLLIB]Add options to disable multi-threading of native
BLAS
## What changes were proposed in this pull request?
Many ML/MLLIB algorithms use native BLAS (like Intel MKL, ATLAS, OpenBLAS)
to improvement the performance.
Many popular Native BLAS, like Intel MKL, OpenBLAS, use multi-threading
technology, which will conflict with Spark. Spark should provide options to
disable multi-threading of Native BLAS.
https://github.com/xianyi/OpenBLAS/wiki/faq#multi-threaded
https://software.intel.com/en-us/articles/recommended-settings-for-calling-intel-mkl-routines-from-multi-threaded-applications
## How was this patch tested?
The existing UT.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mpjlu/spark optimzeBLAS
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18551.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #18551
----
commit d0d94e117e5ce6b69a44299ee1ef180df1935aab
Author: Peng Meng <[email protected]>
Date: 2017-07-06T07:51:10Z
disable multi-threading in spark-env.sh
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