how to find where my program is spinning?

[William_H_7]

Hello,

I have looked through the forums and other TBB resources and based on vtune I can see my program is spending a lot of time spinning but I have not found out where it is spinning yet.

I have parallel studio and would appreciate any advice on how to find out where the program is spinning so I can fix it. Overall it seems my parallelization is not very well balanced and I am trying to figure out where the problems are.

If this kind of thing is caused by one thread doing a lot of work and the others running out of work if I can find out where that is happening there are some tasks I can break up more finely at the cost of a small amount of memory.

I am using TBB + the TBB version of MKL for BLAS and LAPACK calls. 

Thank you for the help

[Dmitry_P_Intel1]

Hello,

Could you please switch stack attribution to "User/System" from default "User function +1" and provide the new picture?

It can be done with "Call Stack Mode" knob on filer bar:

Thank you, Regards, Dmitry

[William_H_7]

Thank you for looking at this.