System and method of scoreboarding individual cache line segment

Details System and method of scoreboarding individual cache line segment System and method of scoreboarding individual cache line segment

1992-07-31

1995-11-28

Chan, Eddie P.

Boots, shoes, and leggings

36424341, 364259, 3642591, 3642593, 3642599, 364DIG1, 395453, 395471, 395375, G06F 1316, G06F 1300

Patent

active

054716020

ABSTRACT:
A system and method for scoreboarding individual cache line units in order to reduce the cache store-miss penalty is disclosed. Store operations to cache addresses which generate a store-miss are allowed to occur during the same time period that a missing line is being retrieved from memory. The cache memory is divided into a plurality of cache lines, each of the cache lines having a plurality of data units. A store-scoreboard, associated with a selected one of the cache lines, maintains a record of the contents of the plurality of data units within the selected cache line. Memory access performance is improved by allowing stores which miss the cache to complete in advance of the miss copy-in and by allowing multiple stores to the same cache line (being retrieved from memory) to occur without a penalty during the latency period of the store miss. Furthermore, a "safety net" is provided for hinted store instructions. The store-scoreboard provides the infrastructure necessary to allow the computer system to verify whether the instruction stream which contains the hinted store has completed its intended obligation.

REFERENCES:
patent: 5155824 (1992-10-01), Edenfield et al.
patent: 5233702 (1993-08-01), Emma et al.
PA-RISC 1.1 Architecture and Instruction Set Manual, Hewlett-Packard Company, 1986-1994.
DeLano et al., "A High Speed Superscalar PA-RISC Processor", IEEE COMPCOM Spring '92 Digest of Papers, Feb., 1992.

Affiliated with

Also associated with

Rating

System and method of scoreboarding individual cache line segment does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and method of scoreboarding individual cache line segment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method of scoreboarding individual cache line segment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2020535