Distributed data dependency stall mechanism

Details Distributed data dependency stall mechanism Distributed data dependency stall mechanism

1997-10-24

2000-07-04

Nguyen, Hiep T.

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

711143, 711121, 711148, 710 39, 710 40, G06F 1208

Patent

active

060852941

ABSTRACT:
A method and apparatus for preventing system wide data dependent stalls is provided. Requests that reach the top of a probe queue and which target data that is not contained in an attached cache memory subsystem, are stalled until the data is filled into the appropriate location in cache memory. Only the associated central processor unit's probe queue is stalled and not the entire system. Accordingly, the present invention allows a system to chain together two or more concurrent operations for the same data block without adversely affecting system performance.

REFERENCES:
patent: 5325510 (1994-06-01), Frazier
patent: 5404483 (1995-04-01), Stamm et al.
patent: 5522058 (1996-05-01), Iwasa et al.
patent: 5530933 (1996-06-01), Frink et al.
patent: 5881253 (1999-03-01), Seeman

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