topic Re: Intel Advisor 2021.1 : What are the percentage numbers next to each module under module filter? in Analyzers

Intel Advisor 2021.1 : What are the percentage numbers next to each module under module filter?

mikeitexpert — Sat, 19 Jun 2021 10:14:12 GMT

Intel Advisor 2021.1 :

What are the percentage numbers next to each module under module filter?

Please let me know.

Re: Intel Advisor 2021.1 : What are the percentage numbers next to each module under module filter?

Ruslan_M_Intel — Mon, 21 Jun 2021 09:53:10 GMT

It's amount of time spent within corresponding module

Re: Intel Advisor 2021.1 : What are the percentage numbers next to each module under module filter?

mikeitexpert — Tue, 22 Jun 2021 05:53:53 GMT

Thanks for the input ...

Do you think it is a sign for over parallelization? If so, how would I be able to better track down the problem? I speculate it has too do with forcing parallelizing using #pragma omp parallel for ... so I may consider using if clauses just to avoid unnecessary parallel execution. However, I am not sure how to verify my guess ...

Please let me know what you think ...

Regards

Re: Intel Advisor 2021.1 : What are the percentage numbers next to each module under module filter?

Ruslan_M_Intel — Tue, 22 Jun 2021 07:02:13 GMT

Yes, the overhead you faced with can be caused by the reason you are talking about. You can try playing with OMP_NUM_THREADS env var (e.g. 1, 4 and

Re: Intel Advisor 2021.1 : What are the percentage numbers next to each module under module filter?

mikeitexpert — Thu, 24 Jun 2021 04:43:38 GMT

Is there any way to force IA (Intel Advisor) use omp debug dlls just to better find out ? I am not sure how I can use debug dlls....

I have tried below but no luck ....

Re: Intel Advisor 2021.1 : What are the percentage numbers next to each module under module filter?

Ruslan_M_Intel — Thu, 24 Jun 2021 08:04:36 GMT

Unfortunately, no. Advisor doesn't do anything like that. Could you tell what you're going to achieve doing that?

Re:Intel Advisor 2021.1 : What are the percentage numbers next to each module under module filter?

RashmiP_Intel — Fri, 25 Jun 2021 13:19:43 GMT

Hi,

Intel® VTune™ Profiler optimizes application performance, system performance, and system configuration for HPC, cloud, IoT, media, storage, and more.

So you can also use vtune for this question.

You can refer to https://software.intel.com/content/www/us/en/develop/documentation/vtune-cookbook/top/tuning-recipes/openmp-imbalance-and-scheduling-overhead.html this cookbook.

Regards,

Rashmi

Re: Intel Advisor 2021.1 : What are the percentage numbers next to each module under module filter?

mikeitexpert — Fri, 25 Jun 2021 14:08:14 GMT

Ruslan,

Thanks for the comment I lowered the number of threads to 1 and it turns out it reduces libiomp5md.dll time. Though I am not sure whether it is a good sign or bad sign ??? I am just trying to find whether I have unnecessary parallelizing or not.

Re: Intel Advisor 2021.1 : What are the percentage numbers next to each module under module filter?

Ruslan_M_Intel — Fri, 25 Jun 2021 14:57:48 GMT

Probably you need to go through Threading Workflow then. Check this out - https://software.intel.com/content/www/us/en/develop/videos/introduction-to-intel-advisor-threading-workflow.html

Re: Intel Advisor 2021.1 : What are the percentage numbers next to each module under module filter?

mikeitexpert — Mon, 28 Jun 2021 13:11:40 GMT

Feel free to close the thread ...

Thank you

Re:Intel Advisor 2021.1 : What are the percentage numbers next to each module under module filter?

RashmiP_Intel — Tue, 29 Jun 2021 04:53:30 GMT

Hi,

Thanks for accepting our solution. If you need any additional information, please submit a new question as this thread will no longer be monitored.

Regards,

Rashmi