Meaning of "TBB Dispatch Loop" in VTune?

[AJ13]

Hi everyone,

I am currently tuning an application with VTune.  What exactly does it mean if a program spends considerable time in "TBB Dispatch Loop"?  I assume this is overhead introduced by the scheduler spawning tasks?

Thanks.

[Anton_M_Intel]

*wait_for_all methods are replaced in VTune by TBB Dispatch Loop. I doubt it is the top of the stack for a hot-spot you see. There should be either a parallel algorithm (with your functor) or receive_or_steal_task(). If you want more advice, please post here a snapshot of the stack where you see it.