Systems, methods, and devices for cache block coherence
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United States of America Patent
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Oct 7, 2014
Grant Date -
Dec 13, 2012
app pub date -
Jun 9, 2011
filing date -
Jun 9, 2011
priority date (Note) -
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Abstract
Systems, methods, and devices for efficient cache coherence between memory-sharing devices are provided. In particular, snoop traffic may be suppressed based at least partly on a table of block tracking entries (BTEs). Each BTE may indicate whether groups of one or more cache lines of a block of memory could potentially be in use by another memory-sharing device. By way of example, a memory-sharing device may employ a table of BTEs that each has several cache status entries. When a cache status entry indicates that none of a group of one or more cache lines could possibly be in use by another memory-sharing device, a snoop request for any cache lines of that group may be suppressed without jeopardizing cache coherence.
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