topic cblas_dgemm crashing when thread is terminated in Intel® oneAPI Math Kernel Library

cblas_dgemm crashing when thread is terminated

Almeida__Caetano — Thu, 23 May 2019 21:10:21 GMT

Hello,

I have a multithread code and I using MKL multithreaded as well.

I have created a unit test that always crashes MKL.

Let me explain the test:

From the main thread (MT), I create another thread (T1) to multiply a 4096x4096 matrix.
T1 calls cblas_dgemm
It's a heavy processing, then I let MT sleep for 1 second
Then, I invoke T1 termination
MKL crashes 100% of my attempts so far

Would someone know how can I work this around? I mean, to turn cblas_dgemm thread safer.

Thanks.

Gennady_F_Intel — Fri, 24 May 2019 03:35:40 GMT

could you give us the example of the code we could compile and reproduce?

Almeida__Caetano — Fri, 24 May 2019 16:23:00 GMT

Resolved!

Updated from 2018.3 to 2019.4 and the crash doesn't happen anymore!