Practice Cache Coherence And Consistency (7.6) - Caches

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10 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is cache coherence?
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Think about what happens when one core updates shared data.
Question 2.
What does MESI stand for?
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It’s an acronym related to cache protocols.
3Question 3.
What is the primary purpose of cache coherence protocols?
- To increase CPU speed
- To reduce memory traffic
- To maintain data consistency
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Think about why multiple caches need to agree.
4Question 4.
True or False: The MESI protocol only includes the Modified and Shared states.
- True
- False
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Recall the full acronym of MESI.
Question 5.
Analyzing a multi-core system, if Core A updates a cache line to Modified while Core B has it as Shared, what mechanisms ensure Core B receives the updated value, and how does this impact performance?
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Consider how communication happens between caches.
Question 6.
Propose enhancements to the MESI protocol that could further reduce the latency in cache coherence mechanisms.
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Think about improving notification processes for updates.

6 more questions in this section. Enroll free to practise them all.