Use the two-level memory equation in Appendix 1A to answer this question: A computer has a cache and main memory. If a referenced word is in the cache, 20 ns are required to access it. If it is in main memory but not in the cache, 60 ns are needed to load it into the cache (this includes the time to originally check the cache), and then the reference is started again. The cache hit ratio is 0.9. What is the average time in ns required to access a referenced word on this system?
Use the two-level memory equation in Appendix 1A to answer this question: A computer has a cache and main memory. If a referenced word is in the cache, 20 ns are required to access it. If it is in main memory but not in the cache, 60 ns are needed to load it into the cache (this includes the time to originally check the cache), and then the reference is started again. The cache hit ratio is 0.9. What is the average time in ns required to access a referenced word on this system?
Chapter4: Processor Technology And Architecture
Section: Chapter Questions
Problem 2PE: If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the...
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