in CO and Architecture
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Compute the average access time for a machine with 80%cache hit ratio.The cache access time and memory access time are 20 ns and 200 ns .

DOUBT:: While solving these type of questions which type of model we need to follow case 1 or case 2 ?

PS: Circle is a processor :P

in CO and Architecture
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60ns
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I do not want the answer .Plz tell me by default which model is used ?
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1 Answer

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Mostly they will be mentioned , if not case 2 is generally considered

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By default cache access is Hierarchical.[ here by default means if no hint is given in the question ]

{ Reason : simultaneous is a more specialized technique and it also reduces access time even though marginally , hence not a practical scenario . }

By Default Use Case 1

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