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4 cards from this section. Quick, good the night before a test.
What is the main purpose of a cache in a CPU?
Think about why computers often have a memory component close to the CPU.
Define L1 cache in one sentence.
Remember its purpose of speed in memory access.
What is the main function of L1 cache?
Consider which cache level is closest to the CPU.
True or False: The L1 cache is larger and slower than the L2 cache.
Remember the size and access speed comparisons.
A CPU accesses main memory at 4 GHz with a base CPI of 1. If it misses L1 at a rate of 2% and the main memory access time is 100 ns, calculate the effective CPI. What performance ratio can be anticipated after adding a L2 cache that mitigates the miss penalty to 20 cycles?
Keep the formulas handy.
Compare the performance metrics of a system with only L1 Cache and one with both L1 and L2 Cache. What does the analysis reveal about cache effectiveness?
Think about the interaction between L1 and L2 in your calculations.
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