Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Reexamination Certificate
2007-06-22
2010-06-15
Kim, Matt (Department: 2186)
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
C711S147000
Reexamination Certificate
active
07739455
ABSTRACT:
Livelocks are prevented in multiple core processors by verifying that a data access request is still valid before sending messages to processor cores that may cause other data access requests to fail. A cache coherency manager receives data access requests from multiple processor cores. Upon receiving a data access request that may cause a livelock, the cache coherency manager first sends an intervention message back to the requesting processor core to confirm that this data access request will succeed. If the requesting processor core determines that the data access request is still valid, it directs the cache coherency manager to proceed with the data access request. The cache coherency manager may then send intervention messages to other processor cores to complete the data access request. If the requesting processor core determines that the data access request is invalid, it directs the cache coherency manager to abandon the data access request.
REFERENCES:
patent: 5941967 (1999-08-01), Zulian
patent: 6643803 (2004-11-01), Swoboda et al.
patent: 7096289 (2006-08-01), Brown et al.
patent: 2002/0087811 (2002-07-01), Khare et al.
patent: 2004/0083321 (2004-04-01), McAllister
patent: 2004/0093455 (2004-05-01), Duncan et al.
patent: 2007/0043913 (2007-02-01), Hetherington et al.
patent: 2008/0091884 (2008-04-01), Piry et al.
“International Search Report PCT/US08/67719”, Oct. 1, 2008.
Kinter Ryan C.
Vishin Sanjay
Kim Matt
Law Office of Jonathan Hollander PC
MIPS Technologies Inc.
Rossiter Sean
LandOfFree
Avoiding livelock using a cache manager in multiple core... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Avoiding livelock using a cache manager in multiple core..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Avoiding livelock using a cache manager in multiple core... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4168883