Part I: Parallel Computer Memory Access Models Cache-Only Memory Access(COMA) COMA model is a special case of NUMA in which the distributed memories are converted to caches All caches form a global address space Remote cache access is assisted by the distributed cache directories COMA multiprocessor model is the following Interconnection Network D c NHPCC(Hefei)·USTC· CHINA glchen @ustc.ed.cl -17NHPCC(Hefei) •USTC •CHINA glchen@ustc.edu.cn 1 -17 Part I : Parallel Computer Memory Access Models