Way to reduce thread back-off spinning?

[slomp]

Is there a way to set a policy to make worker thread prefer parking/waiting instead of spinning?

[dnmokhov]

Hi @slomp. Thank you for asking.

You can use the following preview feature: https://uxlfoundation.github.io/oneTBB/main/reference/parallel_phase_for_task_arena.html

Consider setting fast leave policy to move worker threads back to the thread pool to sleep once there are no arenas with active demand.

More details and examples for this feature are available at https://github.com/uxlfoundation/oneTBB/tree/master/rfcs/experimental/parallel_phase_for_task_arena