Salvaging lock elision transactions with instructions to change execution type
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United States of America Patent
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Sep 13, 2016
Grant Date -
Aug 27, 2015
app pub date -
Feb 27, 2014
filing date -
Feb 27, 2014
priority date (Note) -
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Abstract
A transactional memory system salvages a hardware lock elision (HLE) transaction. A processor of the transactional memory system executes a lock-acquire instruction in an HLE environment and records information about a lock elided to begin HLE transactional execution of a code region. The processor detects a pending point of failure in the code region during the HLE transactional execution. The processor stops HLE transactional execution at the point of failure in the code region. The processor acquires the lock using the information, and based on acquiring the lock, commits the speculative state of the stopped HLE transactional execution. The processor starts non-transactional execution at the point of failure in the code region.
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