Cache control method and cache controller

Details Cache control method and cache controller Cache control method and cache controller

1993-06-15

1998-05-05

Rudolph, Rebecca L.

39518318, 395468, G06F 1200

Patent

active

057489858

ABSTRACT:
In a cache controller having a cache disposed between a CPU and a direct access storage for temporarily storing therein data transferred between the CPU and the storage, data is written from the cache into the storage in a write after mode. There is employed an update generation identifier specified by the CPU at each predetermined point of time. When storing data (write after data) from the cache into the storage in the write after mode, the last update generation specified prior to when the data is first written in the cache is set as the update generation of the data. When an update generation is specified by the CPU, write after data having a generation older than the specified generation by a predetermined effective management generation number n or more is preferentially written in the storage. When write after data is lost in the cache due to a failure during execution of a program, old data is read from the storage to execute again the program beginning from a point thereof corresponding to the oldest update generation of write after data, thereby recovering the lost write after data. Alternatively, the write after data is recovered by use of the update journals beginning from a point thereof associated with the oldest update generation.

REFERENCES:
patent: 4084231 (1978-04-01), Capozzi et al.
patent: 4507751 (1985-03-01), Gawlick et al.
patent: 4593354 (1986-06-01), Ushiro
patent: 4916605 (1990-04-01), Beardsley et al.
patent: 5327556 (1994-07-01), Mohan et al.
patent: 5418921 (1995-05-01), Cortney et al.
Janssens et al, "Performance of Cache-Based Error Recovery in Multiprocessors", IEEE Trans on Par. & Dist. Sys, V5, N10, Oct. 1994 pp. 1033-1043.
Wu et al, "Error Recovery in Shared Memory Multiprocessors Using Private Caches", IEEE Trans on Par. & Dist. Sys., V1, N2, Apr. 1990 pp. 231-240.

Affiliated with

Also associated with

Rating

Cache control method and cache controller does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cache control method and cache controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cache control method and cache controller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-70860