Adaptive read pre-fetch

Details Adaptive read pre-fetch Adaptive read pre-fetch

2001-03-27

2004-09-21

Thai, Xuan M. (Department: 2111)

Electrical computers and digital data processing systems: input/

Input/output data processing

Data transfer specifying

C710S311000, C711S137000, C712S207000

Reexamination Certificate

active

06795876

ABSTRACT:

FIELD OF THE INVENTION
This disclosure relates to computer read pre-fetch operations.
BACKGROUND OF THE INVENTION
Existing PCI bridges assist in the control of the sequencing of operations and access to computer busses in accordance with the bus specification (such as, for example, PCI Local Bus Specification Rev. 2.2 published by the PCI Special Interest Group). Pre-fetch algorithms are not covered by the PCI specification, but are widely employed by PCI devices to circumvent a fundamental issue with PCI protocol: it does not include a read amount embedded within each transaction. Such PCI devices employ a static read pre-fetch which requests the same amount of information for a particular type of read operation, regardless of the actual demands of the requesting agent. While this constant pre-fetch amount may be adjustable by means of a device specific configuration register, the selected amount is constant and applicable to all requesting agents served in connection with that register. A static pre-fetch amount may result in pre-fetching too much data.


REFERENCES:
patent: 5146578 (1992-09-01), Zangenehpour
patent: 5761464 (1998-06-01), Hopkins
patent: 5765213 (1998-06-01), Ofer
patent: 5768548 (1998-06-01), Young et al.
patent: 5778435 (1998-07-01), Berenbaum et al.
patent: 5860150 (1999-01-01), Chiarot et al.
patent: 5958040 (1999-09-01), Jouppi
patent: 6012106 (2000-01-01), Schumann et al.
patent: 6029228 (2000-02-01), Cai et al.
patent: 6085291 (2000-07-01), Hicks et al.
patent: 6134643 (2000-10-01), Kedem et al.
patent: 6167506 (2000-12-01), Witt
patent: 6195735 (2001-02-01), Krueger et al.
patent: 6401193 (2002-06-01), Afsar et al.
patent: 6496921 (2002-12-01), Arimilli et al.
patent: 6609168 (2003-08-01), Willke, II
patent: 6622212 (2003-09-01), Tetrick
patent: 6625696 (2003-09-01), Willke, II
patent: 284100 (1988-09-01), None
patent: 0 924 620 (1999-06-01), None
patent: 01189728 (1989-07-01), None
patent: 2000187638 (2000-07-01), None
“Bus Request Update Mechanism to Improve Processor Performance,” Aug. 1, 1995, IBM Technical Disclosure Bulletin, p. 261 264.

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