CONFIGURABLE SNOOP FILTERS FOR CACHE COHERENT SYSTEMS
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United States of America Patent
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Jun 30, 2016
app pub date -
Dec 31, 2014
filing date -
Dec 31, 2014
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Abstract
A cache coherent system includes a directory with more than one snoop filter, each of which stores information in a different set of snoop filter entries. Each snoop filter is associated with a subset of all caching agents within the system. Each snoop filter uses an algorithm chosen for best performance on the caching agents associated with the snoop filter. The number of snoop filter entries in each snoop filter is primarily chosen based on the caching capacity of just the caching agents associated with the snoop filter. The type of information stored in each snoop filter entry of each snoop filter is chosen to meet the desired filtering function of the specific snoop filter.
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