Question: If a serial mode cache is used and a 5% penalty in speedup ratio over the corresponding parallel access cache can be tolerated, what value

If a serial mode cache is used and a 5% penalty in speedup ratio over the corresponding parallel access cache can be tolerated, what value of the hit ratio is necessary to achieve this? Assume that the main store access time is 30 ns and that the cache access time is 3 ns.

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