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An Oracle blog about Transactional locks

HCLH Locks - an additional constraint

Dave Dice
Senior Research Scientist

HCLH Locks are NUMA-friendly hierarchical queue-based CLH locks. Subsequently, we've discovered that for correctness threads must be bound 1:1. Absent such binding the locks are vulnerable to exclusion failure related to node circulation & lifecycle issues. That particular invariant wasn't made clear in the HCLH paper.

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