Memory Hierarchy Motivation, Definitions, Four Questions about Memory Hierarchy, Improving Performance. Admin
Memory Hierarchy— Motivation, Definitions, Four Questions about Memory Hierarchy, Improving Performance Professor Alvin R. Lebeck Computer Science 220...
Memory Hierarchy— Motivation, Definitions, Four Questions about Memory Hierarchy, Improving Performance Professor Alvin R. Lebeck Computer Science 220 ECE 252 Fall 2008
Admin • Some stuff will be review…some will not • Projects… • Reading – – – –
Most of today should be review…later stuff will not The Memory Hierarchy Direct Mapped Cache. Two-Way Set Associative Cache Fully Associative cache Replacement Policies Write Strategies Memory Hierarchy Performance Improving Performance
Capacity Access Time Cost CPU Registers 100s Bytes 1 / DRAM write cycle – If this condition exist for a long period of time (CPU cycle time too quick and/or too many store instructions in a row): » Store buffer will overflow no matter how big you make it » The CPU Cycle Time