topic pardiso in multi thread mode in Intel® oneAPI Math Kernel Library

pardiso in multi thread mode

Alexey1978 — Tue, 17 Aug 2021 18:41:44 GMT

Good day.

I have encountered with the folowing problem.

A have Qt C++ on Win 64, MSVC2019 64bit

LIBS += -L'C:\Program Files (x86)\Intel\oneAPI\mkl\2021.2.0\lib\intel64'\
-lmkl_core_dll -lmkl_intel_thread_dll -lmkl_intel_lp64_dll

I run my program with the following dll:
mkl_core.1.dll
mkl_def.1.dll
mkl_intel_thread.1.dll
mkl_sequential.1.dll

it doesn't work without mkl_sequential.1.dll

Im solving sparse complex matrix
PARDISO (pt, &maxfct, &mnum, &mtype, &phase,
&n, a, ia, ja, &idum, &nrhs, iparm, &msglvl, b, x, &error);

it works only in sequential mode. It uses only 25% of my processor Intel i5-6400.

Why id doesn't work in parallel mode?

Thanks a lot

Re: pardiso in multi thread mode

VidyalathaB_Intel — Wed, 18 Aug 2021 10:19:16 GMT

Hi,

Thanks for reaching out to us.

>>Why id doesn't work in parallel mode?

We tried executing a sample code using pardiso in Visual Studio 2019 in parallel mode and it is working fine.

>>A have Qt

Please refer the below link for system requirements of Intel oneMKL

https://software.intel.com/content/www/us/en/develop/articles/oneapi-math-kernel-library-system-requirements.html

>>Intel\oneAPI\mkl\2021.2.0

Also please try with the latest mkl version 2021.3.0

We suggest you to try compiling the code in Visual studio by following the below link

https://software.intel.com/content/www/us/en/develop/articles/intel-math-kernel-library-intel-mkl-compiling-and-linking-with-microsoft-visual-cc.html

Hope the provided information might help you

Regards,

Vidya.

Re: pardiso in multi thread mode

Alexey1978 — Mon, 23 Aug 2021 09:52:58 GMT

Thank you, Vidya.

As I realised, the problem in Qt. It cannot compile (both MSVC, MinGW) program with #include <omp.h> and gives an error. Withot omp.h it works good in sequential mode.

Alexey.

Re: pardiso in multi thread mode

VidyalathaB_Intel — Thu, 02 Sep 2021 11:48:51 GMT

Hi,

>>As I realised, the problem in Qt

Since the issue is related to Qt, we won't be able to provide support on it.

Do let us know if you need any other help. If not could you please confirm us whether we can close this thread from our end?

Regards,

Vidya.

Re: Re:pardiso in multi thread mode

Alexey1978 — Sun, 29 Aug 2021 10:10:49 GMT

Yes, I think it is Qt problem. Thank you very much.

Re:pardiso in multi thread mode

VidyalathaB_Intel — Mon, 30 Aug 2021 03:24:03 GMT

Hi,

Thanks for the confirmation.

If you need any additional information from intel, please post a new question as this thread will no longer be monitored.

Regards,

Vidya.