Safely rolling back transactions in a transactional memory system with concurrent readers
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United States of America Patent
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Oct 4, 2016
Grant Date -
Mar 3, 2011
app pub date -
Sep 3, 2009
filing date -
Sep 3, 2009
priority date (Note) -
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Abstract
A technique for safely rolling back transactional memory transactions without impacting concurrent readers of the uncommitted transaction data. An updater uses a transactional memory technique to perform an data update on data that is shared with a reader. The update is implemented as a transaction in which the updated data is initially uncommitted due to the transaction being subject to roll back. The reader is allowed to perform a data read on the uncommitted data during the transaction. Upon a rollback of the transaction, reclamation of memory locations used by the uncommitted data is deferred until a grace period has elapsed after which the reader can no longer be referencing the uncommitted data.
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