适用于多核环境的混合Cache一致性协议

Hybrid Cache Coherence Protocol Suitable for Multi-core Environment

提出一种适用于多核环境的混合Cache一致性协议。该协议采用混合值传播策略,引入小容量目录D-Cache,克服传统监听一致性协议发送数据请求时盲目广播的缺点,通过数据块状态的扩展,有效避免乒乓现象的发生。仿真实验结果表明,该协议能减少测试程序的运行时间,降低多核处理器私有L1 Cache的失效率,提高系统性能。

This paper presents a hybrid Cache coherence protocol suitable for multi-core environment. It uses the hybrid value propagation police, introduces a small capacity directory, D-Cache. The protocol overcomes the shortcoming of traditional coherence protocol that data request is undifferentiated broadcasted. It extends data block state so that eliminates ping-pang phenomenon. Simulation experimental results show that the protocol reduces test workload runtime and L1 Cache miss rate, improves the system performance.