Chapter 7 - Parallel architectures, shared memory and cache coherency

Advanced Computer Architecture Chapter 7.58

Summary

Caches contain all information on state of cached memory blocks

Snooping and Directory Protocols similar; bus makes snooping easier because of broadcast (snooping => uniform memory access)

Directory has extra data structure to keep track of state of all cache blocks

Distributing directory => scalable shared address multiprocessor
=> Cache coherent, Non uniform memory access