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4 cards from this section. Quick, good the night before a test.
Define what L1 cache is.
Think about the cache that is closest to the CPU.
What does miss rate refer to?
Consider how often a requested data piece is not found in cache.
What is the primary function of L2 cache?
Think about the relationship between the two cache types.
A higher miss rate generally leads to what consequence?
Recall how miss rates correlate to memory access.
A system has an L1 cache with a 2% miss rate and a penalty of 50 cycles, along with an L2 cache miss rate of 1% with a penalty of 10 cycles. Calculate the effective CPI given that the base CPI is 1.
Apply the miss rates and penalties for both caches while starting with base CPI.
Given a CPU base CPI of 1.3 with a main memory access time of 150 nanoseconds and a clock cycle of 0.5 nanoseconds, calculate the miss penalty if the CPU accesses the main memory three times due to cache misses.
Find individual penalties before summing to get the overall effective CPI.
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