setNumThreads not working in maven distribution

[austin-sandia]

Hi,

I am using this jar:
https://mvnrepository.com/artifact/com.intel.analytics.bigdl.native/mkl-java/0.2.0

When I run the (Kotlin) code below

println("${MKL.getMklNumThreads()}, ${MKL.getNumThreads()}")
MKL.setNumThreads(2)
println("${MKL.getMklNumThreads()}, ${MKL.getNumThreads()}")

my output is

1, 1
true
1, 1

I see that there is a libiomp5.so in the jar. Any idea why setNumThreads isn't working?

Thanks.

[i8run]

Hi amuseoffire,

You should use getNumThreads instead of getMklNumThreads. https://github.com/intel-analytics/BigDL-core/blob/94120d6a1bc060cd255a7cdf76339cc72f88f1aa/mkl2017-xeon-blas/jni/src/main/java/com/intel/analytics/bigdl/mkl/MKL.java#L276

The getMklNumThreads() in mkl-java is used for getting the number of threads user defined through java property bigdl.mklNumThreads .
https://github.com/intel-analytics/BigDL-core/blob/94120d6a1bc060cd255a7cdf76339cc72f88f1aa/mkl2017-xeon-blas/jni/src/main/java/com/intel/analytics/bigdl/mkl/MKL.java#L88

This project is mainly for https://github.com/intel-analytics/BigDL. So it contains some methods/functions which just fit to BigDL.

[austin-sandia]

Hi,

Thank you for your response.

I am seeing the same behavior with MKL.getNumThreads(). Here's the code:

println("${MKL.getNumThreads()}")
MKL.setNumThreads(2)
println("AFTER CHANGE")
println("${MKL.getNumThreads()}")

And the output is still this:

1
AFTER CHANGE
1

Any suggestions?

Thanks.

[i8run]

Hi,

Thanks for your test. :) It's due to the bug (wrong usage of omp_get_num_threads). I will push the fix soon.

[austin-sandia]

Thank you. When might I be able to pick up the fix on maven?

[i8run]

Hi, we have pushed to sonatype with 0.4.0-SNAPSHOT. You can try it now. Any question is welcomed.