Hi, I'm studying Computer Architecture in my uni and I'm very confused about the average access time formula. It seems like there are 2 formulas to calculate the average access time the one you used in the video and another one is AMAT = Hit time + (Miss rate x Miss penalty) My question is what is the 'Miss penalty' above. Could you explain me? I would be very appreciate to hear the answer.
+Acerinth Miss penalty basically means the total time to fetch and read a record when a miss occurs. In short, it is the time incurred when a miss occurs. It may include the time taken to perform block transfers to load the record in cache and some additional overheads. Hope this would have been helpful...
Thank you for the reply! Still, I am a little bit confused. Is there any difference between those 2 formulas? I tried to solve a problem using each of them but the answers I got were different. That's the point why I'm very confused.
Mam hindi bona paap ho jayega kya aapke liye english mein hi upload karti ho lectures hindi mein bhi upload kar diya karo samajh mien toh hindi mein hi jyaada aata hai
Cache latency is included in the timings of cache itself (i.e. 5 ns and 50 ns). There is no extra cache latency given. Please go through the question once again. I always make a point to verify the solutions and answers posted by me from reputed sources and thus they are always correct.
Why did you take simultaneous access rather than hierarchical (because cache word is mentioned so it should be hierarchical)
What is the correct measurement of cache performance Avg M/M access time Or Hit Ratio?
thnx
Hi, I'm studying Computer Architecture in my uni and I'm very confused about the average access time formula.
It seems like there are 2 formulas to calculate the average access time the one you used in the video and another one is
AMAT = Hit time + (Miss rate x Miss penalty)
My question is what is the 'Miss penalty' above. Could you explain me? I would be very appreciate to hear the answer.
+Acerinth Miss penalty basically means the total time to fetch and read a record when a miss occurs. In short, it is the time incurred when a miss occurs. It may include the time taken to perform block transfers to load the record in cache and some additional overheads. Hope this would have been helpful...
Thank you for the reply! Still, I am a little bit confused. Is there any difference between those 2 formulas?
I tried to solve a problem using each of them but the answers I got were different. That's the point why I'm very confused.
I'll upload an example question corresponding to each one of them very soon...
i don't think that ur farmula is correct
and the farmula used my mam is common sence and straight forward
@@GANESHKUMAR-kq8vj change your teacher, both for english and COA
Why don't we have to add five in 80/100(5) +20/100(5+50) in miss section of problem ?
Because it is specifically given that the time taken for miss is 50 ns.
I think you are confusing it with general memory access time. It's written time taken in case of "Miss".
i think we also has to add .2 * 5 as in case of miss we first search in cache...so we have to add that time period as well....
No, its specifically written that it is total time for miss.
What to use simultaneous or hierarchical
Depends upon your need and purpose.
Memory Access time of RAM or cache plz define it this is confusing for me
Its cache.
Ur voice is like anushka sharma
Thank you.
Mam hindi bona paap ho jayega kya aapke liye english mein hi upload karti ho lectures hindi mein bhi upload kar diya karo samajh mien toh hindi mein hi jyaada aata hai
hindi videos bhi hain. plz check channel.
mam can u pls give your email id for doubt purpose plzz m from ece and preparing for ies so these subjcts are included in our syllabus..
Sure its rkclasses15@gmail.com
thanku mam :)
Wrong answer as you miss cache latency
Cache latency is included in the timings of cache itself (i.e. 5 ns and 50 ns). There is no extra cache latency given. Please go through the question once again. I always make a point to verify the solutions and answers posted by me from reputed sources and thus they are always correct.