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Title: Managing coherence via put/get windows

Abstract

A method and apparatus for managing coherence between two processors of a two processor node of a multi-processor computer system. Generally the present invention relates to a software algorithm that simplifies and significantly speeds the management of cache coherence in a message passing parallel computer, and to hardware apparatus that assists this cache coherence algorithm. The software algorithm uses the opening and closing of put/get windows to coordinate the activated required to achieve cache coherence. The hardware apparatus may be an extension to the hardware address decode, that creates, in the physical memory address space of the node, an area of virtual memory that (a) does not actually exist, and (b) is therefore able to respond instantly to read and write requests from the processing elements.

Inventors:
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [3]
  1. Ridgefield, CT
  2. Croton on Hudson, NY
  3. Yorktown Heights, NY
  4. Mount Kisco, NY
  5. Irvington, NY
  6. Cortlandt Manor, NY
  7. Ossining, NY
Publication Date:
Research Org.:
International Business Machines Corporation (Armonk, NY)
Sponsoring Org.:
USDOE
OSTI Identifier:
1036472
Patent Number(s):
8,122,197
Application Number:
12/543,890
Assignee:
International Business Machines Corporation (Armonk, NY) OSTI
DOE Contract Number:  
B517552
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING

Citation Formats

Blumrich, Matthias A, Chen, Dong, Coteus, Paul W, Gara, Alan G, Giampapa, Mark E, Heidelberger, Philip, Hoenicke, Dirk, and Ohmacht, Martin. Managing coherence via put/get windows. United States: N. p., 2012. Web.
Blumrich, Matthias A, Chen, Dong, Coteus, Paul W, Gara, Alan G, Giampapa, Mark E, Heidelberger, Philip, Hoenicke, Dirk, & Ohmacht, Martin. Managing coherence via put/get windows. United States.
Blumrich, Matthias A, Chen, Dong, Coteus, Paul W, Gara, Alan G, Giampapa, Mark E, Heidelberger, Philip, Hoenicke, Dirk, and Ohmacht, Martin. Tue . "Managing coherence via put/get windows". United States. https://www.osti.gov/servlets/purl/1036472.
@article{osti_1036472,
title = {Managing coherence via put/get windows},
author = {Blumrich, Matthias A and Chen, Dong and Coteus, Paul W and Gara, Alan G and Giampapa, Mark E and Heidelberger, Philip and Hoenicke, Dirk and Ohmacht, Martin},
abstractNote = {A method and apparatus for managing coherence between two processors of a two processor node of a multi-processor computer system. Generally the present invention relates to a software algorithm that simplifies and significantly speeds the management of cache coherence in a message passing parallel computer, and to hardware apparatus that assists this cache coherence algorithm. The software algorithm uses the opening and closing of put/get windows to coordinate the activated required to achieve cache coherence. The hardware apparatus may be an extension to the hardware address decode, that creates, in the physical memory address space of the node, an area of virtual memory that (a) does not actually exist, and (b) is therefore able to respond instantly to read and write requests from the processing elements.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 21 00:00:00 EST 2012},
month = {Tue Feb 21 00:00:00 EST 2012}
}

Patent:

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