cache coherence

1. Cache Coherence
Kirtan Shrestha

2. What is Cache?
• Super fast
• Buffer
• Frequently accessed data
• CPU memory
• SRAMs
• L1, L2, L3

3. Cache Coherence and the problem
• Consistency of data
• Change propagated properly
• Multiprocessing system
• Many copies of a same data
• Overwritten and lost data

4. Solutions:
 Snooping Cache
o Write invalidate
o Write update