Documentation clarification

Discussion created by rick.weber on Sep 9, 2011
Latest reply on Sep 9, 2011 by antzrhere

In the APP guide on page 1-12, the following paragraph makes no sense:

"When using these interfaces, it is important to consider the amount of copying involved. There is a two-copy processes: between host and PCIe, and between PCIe and GPU compute device. This is why there is a large performance difference between the system GFLOPS and the kernel GFLOPS."

What does data transfer latency have to do with floating point performance?