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Communication System Using Scalable Parallel Non-Uniform Memory Access, with Address Translation, for Parallel Processing Systems

IP.com Disclosure Number: IPCOM000015014D
Original Publication Date: 2002-Jan-11
Included in the Prior Art Database: 2003-Jun-20

Publishing Venue

IBM

Abstract

This proposal relates to the field of high-performance computing, and in particular to the field of parallel processing , which involves the use of many closely-coupled processor/cache/memory subsystems in parallel to solve computing problems more quickly than can be solved on a single processor/cache/memory subsystem. To a large extent, the performance of many parallel processing applications depends strongly on the communications within the parallel processing system. Two important issues in the field of communications within parallel processing systems include (1) the ability to move small and large amounts of data quickly from one processor, where it is generated, to one or more other processors, where the data is used, and on (2) the ease of programming the parallel system, such that all processor/cache/memory subsystems can be effectively programmed to work efficiently together. Currently, the field of communications within parallel processing systems can be broadly divided into systems using two mechanisms non-coherent communications, and coherent communications. "Non-coherent communications" involve processor-to-processor communications for data where the processors and their associated operating systems address distinct (separate) address spaces. Since the processors address different address spaces, the address where the data is generated in the source processor is unrelated to the address that it is referenced by in the destination processor, so different fields to associate the data in the source and destination processors. Examples of non-coherent processor-to-processor communications range from systems with processors connected through a LAN or WAN using TCP/IP protocols to transport data, to more tightly coupled systems, which use more optimized, high-performance protocols commonly called “message-passing”.