Discussion
In a multiprocessor system where each multiple processors have their own local caches, what is the main challenge that needs to be addressed to ensure data consistency ?
Answer: C
The main challenge is cache coherence.
When each processor keeps its own copy of shared data in its local cache, a write by one processor can leave stale copies in the others. Cache coherence is the problem of keeping all those copies consistent, solved by protocols such as MESI using bus snooping or a directory.
Cache replacement decides which block to evict when a cache is full. Cache partitioning divides a cache among cores or processes. Cache latency is the time an access takes. Each matters for performance, but none of them is about consistency between processors.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development