BusSpeedDownload and BusSpeedReadback - Measures the bandwidth of the PCIe bus by repeatedly transferring data of various sizes to and from the device.

DeviceMemory - Measures device memory bandwidth, including global, constant, and local (shared) memory

Kernel Compilation - Measures the speed at which the OpenCL implementation compiles various example kernels

MaxFlops - Measures maximum achievable FLOPS by executing synthetic kernels composed of different combinations of floating-point arithmetic operations

Queue Delay - Measures overhead of the OpenCL implementation's queueing system