HybridTCache:一种基于专用事务Cache的软硬件协同事务内存系统

文中提出一种高效的软硬件协同事务内存系统HybridTCache.在通常情况下,事务完全由硬件执行,当事务大小超出了硬件限制时,操作系统将协同硬件执行.HybridTCache提出了一种新的专用事务Cache,称为TCache,缓存事务执行过程中的临时数据,由操作系统协同管理TCache溢出.文中给出了基于GEMS模拟器的HybridTCache原型系统.系统的评测显示HybridTCache比传统系统在性能、可扩展性、设计复杂度方面有较好的改进.

HybridTCache: Tightly Coupled Hybrid Transactional Memory System to Support Efficient Unbounded Transactions with Strong Isolation

The paper proposes an efficient and unbounded hybrid-mode TM system,called HybridTCache,which maximum system performance by executing transaction completely in hardware in most common cases and triggering operating system(OS) support with low overhead when transaction size exceeds hardware capacity.HybridTCache provides new data version management by buffering transactional data in an independent cache,named TCache,which hides its value from other threads until transaction commits.TCache provides fast bookkeeping compared with traditional software approach,and makes both commit and abort fast.A key design point of hardware TM is to support unbounded transaction.HybridTCache achieves this by introducing TCache overflow exceptions and resorting OS to handle overflowed blocks.Evaluating the splash2 and STMAP benchmark suits shows that HybridTCache has advantages over traditional systems on performance,scalability and design complexity issues.