3) A computer has 8 GByte of memory with 64 bit word sizes. Each block of memory stores 16 words. The computer has a direct-mapped cache of 128 blocks. The computer uses word-level addressing which means that the offset refers to individual words (not bytes) in the block. a) What is the address format? Give the total number of bits needed and how the bits are distributed between the tag, index (which block) and offset. b) If we change the cache to a 4-way set associative cache, what would be the address format?

Systems Architecture
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ISBN:9781305080195
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Chapter11: Operating Systems
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3)
A computer has 8 GByte of memory with 64 bit word sizes. Each block of memory
stores 16 words. The computer has a direct-mapped cache of 128 blocks. The computer
uses word-level addressing which means that the offset refers to individual words (not
bytes) in the block.
a)
What is the address format? Give the total number of bits needed and how the
bits are distributed between the tag, index (which block) and offset.
b)
If we change the cache to a 4-way set associative cache, what would be the
address format?
Transcribed Image Text:3) A computer has 8 GByte of memory with 64 bit word sizes. Each block of memory stores 16 words. The computer has a direct-mapped cache of 128 blocks. The computer uses word-level addressing which means that the offset refers to individual words (not bytes) in the block. a) What is the address format? Give the total number of bits needed and how the bits are distributed between the tag, index (which block) and offset. b) If we change the cache to a 4-way set associative cache, what would be the address format?
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