SCRAMNet GT Memory Access (PIO vs DMA) White Paper
When transferring data to and from a data store, selection of the most efficient and timely method for doing so is often critical. Selection of an underperforming method can have an adverse impact on what would otherwise be a high performance system. Therefore, when presented with a choice of methods, it is important to understand the characteristics that each provides so that the correct selection(s) can be made. This paper discusses the strengths, limitations, and performance characteristics of the methods for accessing GT memory to help ensure that the correct transfer method is selected for the target system.