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GVasi4
Beginner
268 Views

2 problems with Threading analysis

Hello!

I am trying to profile a C++ application with OpenMP using Intel Vtune Profiler and I have 2 troubles with Threading analysis.
1) If I run the application for a short time (there are different modes and options in this application, so I can vary the time of execution), I reach the limit of 1000 MB collected data in a few minutes.
2) Even if I run application for a short time (data limit isn't reached), after data collection, finalization of the results freezes (see "freeze" picture).

Tell me, please what should I do to solve these problems?

Many thanks! :)

P.S. For example, Hotspot analysis runs relatively correctly. I have Windows 10 and NetBeans with MinGW compiler.

UPD. I've accidentally discovered such options for application that Threading analysis runs correctly (these options corresponds to the most effective and short-time execution). But problems I've mentioned above are still interesting for me because I want to run Threading analysis with different options.

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4 Replies
Vladimir_R_Intel
Employee
268 Views

Hi Grigorii,

I suggest you to try HW-based Threading analysis. I can assume that it doesn't freeze but finalization takes too much time, it can occur with results containing big amount of interval objects (seems on a lot of synchronization objects in a short time).

GVasi4
Beginner
268 Views

Dear VLADIMIR R.,

thank you for your help!
Unfortunately, HW-based Threading analysis has the same problems :(

James_T_Intel
Moderator
268 Views

Can you confirm what version of Intel® VTune™ Profiler you are using?  Please make sure you are using 2020 Update 1.  Are you able to provide the code for us to try to reproduce?

GVasi4
Beginner
268 Views

Dear James T.,

thank you for your response!

Yes, I am using 2020 Update 1. Unfortunately, I can't provide the code.

I think that VLADIMIR R. was right 

it can occur with results containing big amount of interval objects

because I have very bad parallelism on my laptop in general due to unknown causes (see https://software.intel.com/en-us/forums/vtune/topic/856459).

So, I think that this problem is just a consequence of a bigger one, and I want to solve it first. I think this topic can be closed.

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