Non-Blocking Multicore Sync - David M. Washington - Bog

In a general-purpose multicore multithreaded parallel environment, multiple threads work simultaneously to finish a task faster. Usually, threads need to communicate with each other due to the need to share data or synchronize access to shared data. Communications commonly occur when threads need to wait for the computational results of other threads before continuing their own computations; all necessary data dependencies need to be met before subsequent computations take place.