Understanding queues and queue families
Queues are the means by which an application and a physical device communicate. The application provides the jobs in the form of a command buffer that is submitted to the queues. These are read by the physical device and processed asynchronously.
A physical device may support four types of queues, as shown in the following diagram. There could be multiple queues of the same type on a physical device; this allows the application to choose the number of queues and what type of queue it needs. For example, a simple application may require two queues: compute and graphics; here, the former is used for convolution computing and the second renders the computed blur image.
A physical device may consist of one or ...
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