Directory in a Chip Multiprocessor 目录在所有处理器共享的最外层 Cache中 目录记录了每个私有 Cache中块的相关信息 ·最外层 Cache分成若干个 banks,以便并行访问 Cache的 banks数可以与 cores的数量相同,也可以不同 Processor Processor Processor I Processor Processor Processor I Processor Processor Core o Core 1 Core 2 Core 3 Core 4 Core 5 Core 6 Core 7 Private Private Private Private Private Private Private Private Cache Cache 1 Cache 2 Cache 3 Cache 4 Cache 5 Cache 6 Cache 7 Interconnection Network (or Crossbar Switch) Shared Cache Bank o Shared Cache Bank 1 Shared Cache Bank 2 Shared Cache Bank 3 Directory o Directory 1 Directory 2 Directory 3 Memory Controller 0 Memory Controller 1 Memory Controller 2 Memory Controller 3 2021/22 计算机体系结构Directory in a Chip Multiprocessor • 目录在所有处理器共享的最外层Cache中 – 目录记录了每个私有Cache中块的相关信息 • 最外层Cache分成若干个banks，以便并行访问 – Cache的banks数可以与cores的数量相同，也可以不同 2021/2/2 计算机体系结构 7