Tightly coupled processor arrays using coarse grained reconfigurable architecture with iteration level commits

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United States of America Patent

PATENT NO 10120685
APP PUB NO 20170123795A1
SERIAL NO

14932672

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Abstract

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An apparatus and method for supporting simultaneous multiple iterations (SMI) in a course grained reconfigurable architecture (CGRA). In support of SMI, the apparatus includes: Hardware structures that connect all of multiple processing engines (PEs) to a load-store unit (LSU) configured to keep track of which compiled program code iterations have completed, which ones are in flight and which are yet to begin, and a control unit including hardware structures that are used to maintain synchronization and initiate and terminate loops within the PEs. SMI permits execution of the next instruction within any iteration (in flight). If instructions from multiple iterations are ready for execution (and are pre-decoded), then the hardware selects the lowest iteration number ready for execution. If in a particular clock cycle, a loop iteration with a lower iteration number is stalled (i.e., is waiting for data), the instruction from the next highest iteration number that is ready thereby will be automatically executed automatically allowing the CGRA to have high ILP by overlapping concurrent loop iterations.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINE CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Chia-yu White Plains, US 113 690
Gopalakrishnan, Kailash San Jose, US 86 968
Oh, Jinwook Edgewater, US 32 72
Shukla, Sunil K Dobbs Ferry, US 24 100
Srinivasan, Vijayalakshmi New York, US 101 1216

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