OpenCL Programming Guide

Chapter 9. Events

OpenCL commands move through queues executing kernels, manipulating memory objects, and moving them between devices and the host. A particularly simple style of OpenCL programming is to consider the program as a single queue of commands executing in order, with one command finishing before the next begins.

Often, however, a problem is best solved in terms of multiple queues. Or individual commands need to run concurrently, either to expose more concurrency or to overlap communication and computation. Or you just need to keep track of the timing of how the commands execute to understand the performance of your program. In each of these cases, a more detailed way to interact with OpenCL is needed. We address this issue within ...