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Method of data communications with reduced latency

United States Patent

November 5, 2013
View the Complete Patent at the US Patent & Trademark Office
Data communications with reduced latency, including: writing, by a producer, a descriptor and message data into at least two descriptor slots of a descriptor buffer, the descriptor buffer comprising allocated computer memory segmented into descriptor slots, each descriptor slot having a fixed size, the descriptor buffer having a header pointer that identifies a next descriptor slot to be processed by a DMA controller, the descriptor buffer having a tail pointer that identifies a descriptor slot for entry of a next descriptor in the descriptor buffer; recording, by the producer, in the descriptor a value signifying that message data has been written into descriptor slots; and setting, by the producer, in dependence upon the recorded value, a tail pointer to point to a next open descriptor slot.
Blocksome; Michael A. (Rochester, MN), Parker; Jeffrey J. (Rochester, MN)
International Business Machines Corporation (Armonk, NY)
12/ 947,520
November 16, 2010
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with Government support under Contract No. B544331 awarded by the Department of Energy. The Government has certain rights in this invention.