3
Where Does the
Performance Go? or
Why Should I Cares About the Memory Hierarchy?
Why Should I Cares About the Memory Hierarchy?
µProc
60%/yr.
(2X/1.5yr)
DRAM
9%/yr.
(2X/10 yrs)
1
10
100
1000
DRAM
CPU
Processor-Memory
Performance Gap:(grows 50% / year)
Time
“Moore’s Law”
Processor-DRAM
Memory Gap (latency)