conceptual doubt

Question

in case of hierarchical memory organization when there is a miss in cache , we need to bring the entire block from main memory to cache so in the formula-

AMAT= H1*T1+(1-H1(T1+T2))

T1- cache access time/word

T2= memory access time/word

T2 should be the entire block transfer time right? Why in some cases we just take word access time of main memory.

also please tell me what should be T2 in case of simultaneous organization?

Comments

Oh right, I didn't see that, you're correct. It's for write policies. Yes, you're correct. Whenever a read is a miss, it is brought to the cache and read. I'll edit my comment so that other people don't get confused.

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For your other doubt, maybe this will help.

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Thanks. Can u please share if u know about memory access time for write back policy?