topic Hello, in Intel® oneAPI Math Kernel Library

MKL cluster solver: number of threads always equal 1

Facchini__Alberto — Thu, 14 Jun 2018 07:43:57 GMT

Hello everyone,

I'm using the MKL cluster sparse solver but I found a problem related to the number of threads. In fact the number of threads for my example is kept equal to 1 for every calculation and is not maximize according to the maximum number or threads in my nodes.

Someone can help me?

what is the problem size? and

Gennady_F_Intel — Thu, 14 Jun 2018 15:46:22 GMT

what is the problem size? and how to you track the number of threads using by cluster solver?

Hello,

Facchini__Alberto — Fri, 15 Jun 2018 01:56:06 GMT

Hello,

My code is running on 2 or more MPI process. When I run my calculation the Cluster solver should maximize the number of threads per MPI process but is only using 1 threads per MPI process.

If I then build my exe file with Parallel library linking the library "mkl_blacs_intelmpi_lp64" the code works properly maximizing the number of threads but only in 1 MPI process. When I run the calculation with 2 MPI processes I got a segmentation error.

What can I do?

if segmentation fault happens

Gennady_F_Intel — Fri, 15 Jun 2018 04:27:58 GMT

if segmentation fault happens, then please give us the example of this code and show how do you exactly linked launched this case.

You may also report the problem to Intel Online Service Center where you may share your code ( as well as data ) in a private manner.