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Access time
Alina
asked
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CO and Architecture
Jan 6, 2019
edited
Jul 23, 2022
by
Shubham Sharma 2
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What is formula of Average memory access time?
And formula of effective access time?
And the difference between them . I always mix them .
co-and-architecture
cache-memory
general-topic-doubt
Alina
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CO and Architecture
Jan 6, 2019
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Shubham Sharma 2
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Alina
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Harsh Kumar
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303
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In the memory access time formula for the hierarchical cache - which is given as :$Emat = H1\times T1 + (1-H1)(H2\times (T1+T2) + (1-H2)\times (T1+T2+T3))$ (where Hi = Hit Ratio for the i-th level cache and Ti = Access time for i- ... transferred into the cache. Is my intuition correct? If yes, then what should be the Emat formula for Load Back cache ? Should we add extra Ti values?
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MayankSharma
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836
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Cache
What happens on write miss in a write back cache? First write in main memory then bring the block to cache (dirty bit = 0) or First bring the block to cache then write it (dirty bit = 1).
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Consider an array has 100 elements and each element occupies 4 words .A 32 word cache is used and divided into a block of 8 words .What is the hit ratio for this statement for(i=0; i<100; i++) A[i] = A[i]+10; I just want to ask that whenever ... ie 2 elements) are fetched and placed in cache,so why we are doing like this is it because we have to follow law of spatial locality ?
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