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Implications of False Conflict Rate Trends for Robust Software Transactional Memory
2007 IEEE 10th International Symposium on Workload Characterization
We demonstrate that a common optimization for reducing the single-thread overhead of word-based Software Transactional Memory (STM) systems can have a significant negative impact on their scalability. Specifically, we find that the use of a tagless ownership table incurs false conflicts at a rate that grows superlinearly with both the TM data footprint and concurrency, and that increasing the size of the ownership table results in only a sub-linear reduction in conflict rate. These empiricallydoi:10.1109/iiswc.2007.4362177 dblp:conf/iiswc/ZillesR07 fatcat:efxqp5mmajhabl3vab2vrxu7oq