Explicit coherence using split-phase controls
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United States of America Patent
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Sep 1, 1998
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N/A
app pub date -
Sep 10, 1996
filing date -
Sep 10, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for maintaining cache coherence in a shared memory multiprocessor system, where cache coherence is preserved between lock acquires and releases rather than at every single memory load and store. With this invention, a Global Lock Manager (GLM) keeps track of the status of locked ranges without the need to maintain a list of individual processors in the system. Further a Recently Acquired Lock Manager (RALM) keeps track of the status of locked ranges within a processing node to reduce the need to communicate with a GLM.
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