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Method and apparatus for improving synchronization time in a parallel processing system

Patent 5787272 Issued on July 28, 1998. Estimated Expiration Date: Icon_subject June 10, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Parallelization compile method and system
Patent #: 5151991
Issued on: 09/29/1992
Inventor: Iwasawa, et al.

Multiprocessor system having synchronization control mechanism
Patent #: 5222229
Issued on: 06/22/1993
Inventor: Fukuda, et al.

Method of synchronizing parallel processors employing channels and compiling method minimizing cross-processor data dependencies
Patent #: 5317734
Issued on: 05/31/1994
Inventor: Gupta

Barrier synchronization for distributed memory massively parallel processing systems Patent #: 5434995
Issued on: 07/18/1995
Inventor: Oberlin, et al.

Inventors

Assignee

Application

No. 871562 filed on 06/10/1997

US Classes:

709/248, MULTICOMPUTER SYNCHRONIZING713/601Inhibiting timing generator or component

Examiners

Primary: Kim, Kenneth S.

Attorney, Agent or Firm

International Class

G06F 015/16

Abstract

A barrier is used to synchronize parallel processors. The barrier is "fuzzy", i.e. it includes several instructions in each instruction stream. None of the processors performing related tasks can execute an instruction after its respective fuzzy barrier until the others have finished the instruction immediately preceding their respective fuzzy barriers. Processors therefore spend less time waiting for each other. A state machine is used to keep track of synchronization states during the synchronization process.

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