多核共享cache确定性技术

Deterministic technology of multi-core shared cache

为解决多核共享cache竞争冲突引发的确定性问题,研究多核共享cache确定性缓解技术,提出针对多核实时系统的共享cache确定性缓解方法。通过硬件和软件协同方式,以软件配置方式,利用cache硬件分区和cache软件分区方法,优化存储空间管理,避免多核访问同一cache空间,减少多核共享cache竞争。创新点在于设计平台无关的核间cache隔离,在多核实时操作系统中设计和实现,并在国产和国外多核处理器上进行测试验证。实现结果表明,经过确定性缓解后,能够达到共享cache确定性效果,提高多核并行的确定性。

To solve the deterministic problem which caused by multi-core contention conflict on shared cache,the technology of deterministic mitigation on multi-core shared cache was researched,a deterministic mitigation method of shared cache for multi-core real-time system was proposed.Through the hardware and software cooperation,and configuration in software,hardware cache partition software cache partition method was used,the memory space management was redesigned and implemented,multi-core accessing the same cache space was avoided at the same time.The innovation was designing platform independent cache isolation between cores.It was designed and implemented in multi-core real time operation system,and verified on domestic and foreign multi-core processor.Experimental results demonstrate that the deterministic of multi-core shared cache is improved.