Multiprocessor system bus with combined snoop responses implicitly updating snooper LRU position

Upon snooping a combined data access and cast out/deallocate operation initiating by a horizontal storage device, snoop logic determines, from LRU position information appended to the combined response to the combined operation, whether the coherency state and/or LRU position of the victim may be up...

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Bibliographic Details
Main Authors JOYNER JODY B, DODSON JOHN STEVEN, GUTHRIE GUY LYNN, LEWIS JERRY DON, ARIMILLI RAVI KUMAR
Format Patent
LanguageEnglish
Published 21.08.2001
Edition7
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:Upon snooping a combined data access and cast out/deallocate operation initiating by a horizontal storage device, snoop logic determines, from LRU position information appended to the combined response to the combined operation, whether the coherency state and/or LRU position of the victim may be upgraded within the subject storage device. If so, the coherency state or LRU position is upgraded to improve global data storage management. For instance, a cache line within a snooping storage device may be altered to assume the coherency state of the victim within the storage device initiating the combined operation to improve data storage management under a given replacement policy.
Bibliography:Application Number: US19990368227