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A fully associative cache memory unit with a capacity of 64KB is built using a block size of 32 words.The size of the physical address is 30 bits. The size of the tag comparator (in bits) is ____________
asked ago in CO & Architecture by Boss (8.1k points) 1 14 99 | 41 views
word size is 8B or 16 B? should be given
Assume as 8B @sreshtha
Why 8B ? Why not 1 word = 1B
yes 8 bit
what is ans?

1 Answer

0 votes

It is already answered please check this link

http://gateoverflow.in/1963/gate2014-2-9

answered ago by Loyal (3.4k points) 7 17
@ deepthi please note...the above link is based on set assosiativity

here  it is fully associative

but @ A_i_$_h

here asking for tag field

so set associtivity could be assumed.

 

@sreshtha when associativity is not mentioned how to consider

fully associative means the block number = tag bits

what i ahd a doubt is the block size should be converted to bits and then taken for calculation or converting to bytes is enough?
I think answer is 25...is it ??
but it asks for tag comparator

@ashwini how?

 

you have done BS=32 = 25

therefore 30 - 5=25 right

they have asked in bits

so shouldnt we be converting the BS to bytes and then bits and then proceed ..that my doubt

@srestha

read fully associative mapping concept


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