Multiprocessor system with apparatus for propagating cache buffe

Details Multiprocessor system with apparatus for propagating cache buffe Multiprocessor system with apparatus for propagating cache buffe

1980-04-03

1983-05-24

Thomas, James D.

Boots, shoes, and leggings

365189, 371 31, 371 38, G06F 702, G06F 1100, G06F 1500, G06F 1516

Patent

active

043853510

ABSTRACT:
This data processing system includes a main memory which is shared by a plurality of central processor units (CPUs) which are also coupled in cascade in a closed circular path. Each CPU has a cache buffer memory and two sets of transfer registers for receiving and transmitting cancel request signals which identify cache data which is no longer valid. Each CPU's receiving register subsystem includes circuitry for invalidating cache buffer data which has been updated or rewritten in main memory by another CPU in the loop. Each CPU's transmitting register subsystem includes circuitry for inhibiting the transmittal of a cancel request signal if the next CPU in the circle is the same one which originated the particular cache invalidation signal. Circuitry is also provided for propagating a cancel request signal around the loop in opposite directions simultaneously.

REFERENCES:
patent: 3618040 (1971-11-01), Iwamoto et al.
patent: 3631405 (1971-12-01), Hoff et al.
patent: 3699529 (1972-10-01), Beyers et al.
patent: 3735360 (1973-05-01), Anderson et al.
patent: 3771137 (1973-11-01), Barner et al.
patent: 3806885 (1974-04-01), Moore et al.
patent: 3889237 (1975-06-01), Alferness et al.
patent: 3958226 (1976-05-01), Kuroda et al.
patent: 4007450 (1977-02-01), Haibt et al.
patent: 4056844 (1977-11-01), Izumi et al.
patent: 4142234 (1979-02-01), Bean et al.
patent: 4264953 (1981-04-01), Douglas et al.
patent: 4298928 (1981-11-01), Etoh et al.
patent: 4314331 (1982-02-01), Porter et al.
patent: 4322795 (1982-03-01), Lange et al.

Affiliated with

Also associated with

Rating

Multiprocessor system with apparatus for propagating cache buffe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiprocessor system with apparatus for propagating cache buffe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiprocessor system with apparatus for propagating cache buffe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2148371