Understanding physical and logical devices
Vulkan divides the representation of a device into two forms known as the logical and physical device:
- Physical device: A physical device represents a single workforce that may comprise a single GPU along with other hardware parts that work together to help the system accomplish the submitted jobs. On a very simple system, a physical device can be considered to represent the physical GPU unit.
- Logical device: A logical device represents the application view of the actual device.
OpenGL does not expose physical devices; it connects them behind the curtains. Vulkan, on the other hand, exposes the system real computing device or GPU to the application. It allows the application to enumerate ...