Data cache using dynamic frequency based replacement and boundary criteria
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United States of America Patent
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Aug 27, 1991
Grant Date -
N/A
app pub date -
Aug 8, 1989
filing date -
Aug 8, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cache directory keeps track of which blocks are in the cache, the number of times each block in the cache has been referenced after aging at least a predetermined amount (reference count), and the age of each block since the last reference to that block, for use in determining which of the cache blocks is replaced when there is a cache miss. At least one preselected age boundary threshold is utilized to determine when to adjust the reference count for a given block on a cache hit and to select a cache block for replacement as a function of reference count value and block age.
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