A graphics processing unit (GPU) can be used in control and/or data processing systems that require high speed data processing with low input/output latency (i.e., fast transfers into and out of the GPU). Data and/or control information can be transferred directly to and/or from the GPU without involvement of a central processing unit (CPU) or a host memory. That is, in some embodiments, data to be processed by the GPU can be received by the GPU directly from a data source device, bypassing the CPU and host memory of the system. Additionally or alternatively, data processed by the GPU can be sent directly to a data destination device from the GPU, bypassing the CPU and host memory. In some embodiments, the GPU can be the main processing unit of the system, running independently and concurrently with the CPU.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 The invention was made with government support under Grant No. DE-FG02-86ER53222 awarded by the U.S. Department of Energy. The U.S. government has certain rights in the invention.