Pro TBB: C++ Parallel Programming with Threading Building Blocks

© Intel Corporation 2019

Michael Voss, Rafael  Asenjo and James ReindersPro TBBhttps://doi.org/10.1007/978-1-4842-4398-5_11

11. Controlling the Number of Threads Used for Execution

Michael Voss¹ , Rafael Asenjo² and James Reinders³

(1)

Austin, Texas, USA

(2)

Málaga, Spain

(3)

Portland, Oregon, USA

 

By default, the TBB library initializes its scheduler with what is typically the right number of threads to use. It creates one worker thread fewer than the number of logical cores on the platform, leaving one of the cores available to execute the main application thread. Because the TBB library implements parallelism using tasks that are scheduled on to these threads, this is usually the right amount of threads to have – there is exactly one software thread ...