leave_arena function question

[irisshinra308]

Hi~

I have a problem about the leave_arena function.

I have noticed that the master thread would leave and re-enter the arena and some worker threads would leave the arena, too.

What is the purpose of the leaving of the master thread and the worker threads.

By the way, could you tell me what ITT_NOTIFY is?

Thanks

Dennis

[Alexey-Kukanov]

Master thread leaves the arena when the job (e.g a TBBalgorithm) initiated by the master completes. Worker threadsleave the arena before shutting down.

ITT_NOTIFY is necessary to support Intel Threading Analysis Tools as well as Intel Parallel Studio.