DRAM

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The Memory HierarchyHow Computers Work

More terms from this board

• cachesmall fast memory near the CPU
• cache linethe ~64B unit moved between levels
• hit ratefraction of hits
• hit/missfound in cache / had to go slower
• latency vs bandwidthper-access delay vs throughput
• LRU/associativitythe cache's eviction policy
• memory wallCPU-vs-RAM speed gap
• MMU/page tablethe address translator
• NUMAmemory closer to some cores than others (many-socket)
• prefetchCPU guesses & preloads the next line
• spatial localityuse nearby data
• swap/pagingspilling RAM to disk when full
• temporal localityreuse soon
• TLBa cache of translations
• virtual memoryper-process address space
• working setthe memory a program touches often