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All posts related to Cache

Rahul
Shared from Computer Organisation on Dec 12, 2012 6:31 AM

Calculate the impact on performance, i.e. CPU time, if cache miss penalty is 3 clock cycles; the entire instruction memory takes 8 cycles (ignoring memory stalls). Assume miss rate is 11% and there is an average of 6 memory reference per instruction. Calculate the impact on CPC time, if cache is used over without cache.

 
25% improvement
25% degradation
No change
None of the above
Please type your answer before submitting.
Rahul

Not able to understand properly explanation.

Aditee Gautam
Shared from Computer Organisation on Jun 09, 2012 12:35 PM

Suppose, in 1000 memory reference, there are 50 misses in the first level cache and 25 misses in the second level cache. What will be the percent local miss rate of the second level cache?

 
75
50
25
None of these
Please type your answer before submitting.
Shraddha Jayaraman

The solution to this is unclear. How can the global miss rate be 2.5% and how did he get the 50% local miss rate for L2? Can anyone kindly explain

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