topic Re:VTune shows more threads than OpenMP is using in Analyzers

VTune shows more threads than OpenMP is using

high_end_compute — Fri, 08 Dec 2023 09:18:43 GMT

On my system, running a code parallelised with OpenMP and setting OMP_NUM_THREADS=2, OMP_DYNAMIC=false, OMP_PROC_BIND=true, we observe 10 threads, as per screenshot. Please can you explain why?

And what is "orted", "ucs_async_thread_func", "progress_engine" and "listen_thread" that we observe. DLPOLY.Z is the name of our executable which contains MPI calls so was compiled with mpif90 but we are (implicitly) using only 1 MPI process).

We launch our collection:
vtune -collect hotspots --app-working-dir=$(pwd) -- ${EXE_PATH}/DLPOLY.Z

Yours, Michael @mkbane_hec

Re:VTune shows more threads than OpenMP is using

SreedeviK_Intel — Mon, 11 Dec 2023 10:32:04 GMT

Hi,

Good day to you.

Thanks for posting in Intel Communities.

Could you please share the following details so that we could investigate further:

1. Sample reproducer code.

2. VTune version.

3. Exact steps and the commands used.

4. OS and Processor details.

Regards,

Sreedevi

Re:VTune shows more threads than OpenMP is using

SreedeviK_Intel — Tue, 19 Dec 2023 09:59:09 GMT

Hi,

We haven't heard back from you. Could you please confirm if your issue is resolved or not?

Regards,

Sreedevi

Re:VTune shows more threads than OpenMP is using

SreedeviK_Intel — Tue, 26 Dec 2023 06:56:54 GMT

Hi,

Good day to you.

We have not heard back from you. This thread will no longer be monitored by Intel. If you need further assistance, please post a new question.

Regards,

Sreedevi