Question

What is exactly access time in cache memory access?

Comments

I mean:

Searching time is hit/miss latency

Accessing time means: how much time CPU will take in read/write.

If this is the correct explanation then in hierarchical memory access.

Tavg = H1T1 + (1-H1)(T1+T2)

So if data is miss in level 1 then CPU can't access it from the  level1 then why we are taking T1+T2 

Answer 1

" So if data is miss in level 1 then CPU can't access it from the  level1 then why we are taking T1+T2 "

if Data is miss in level one but we also waste T1 time in searching for that data in Level 1

thats why we consider T1

Whether it is present in cache or not we have to search for it in cache

Comments

T1 is accessing time not searching time....Searching time is hit/miss latency

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@Rock, This is called looking at something as close as it starts blurring. I do not know, where you read it, but searching time/ accessing time/ reading time/ writing time all are same, unless and until they have not told specifically different. The formula, you have written, T1 is memory access time, of Level 1 memory, and it represents checking of all the block present in level 1's cache. That's it.