事务存储系统是一种全新的多核体系结构，为并行编程提供了一个简洁高效的编程环境。基于Signature的冲突检测算法是事务存储系统中很有前景的一种冲突检测方法，其误判率直接影响系统性能。GHB算法是一种优秀的冲突检测算法，具有较低的误判率，但硬件实现开销较大。本文对GHB冲突检测算法进行进一步改进，提出了一种PGHB算法。与GHB算法相比，PGHB算法在硬件开销和误判率两者之间取得了更好的折衷。

Transactional memory is a new multiprocessor architecture intended to make parallel programming easy and efficient. Signaturebased conflict detection is a promising approach in transactional memory systems and its rate of false positive has much influence on its performance. The GHB algorithm is an excellent algorithm with a lower false positive rate, but high hardware cost. In this paper, we propose an improved PGHB algorithm based on GHB. The experimental results show that our improvement gains a compromise between the hardware cost and the false positive rate.