Consider the following program and cache behaviors.

Data Reads per $1000$ instructions Data Wirtes per $1000$ instructions Instruction Cache Miss Rate Data Cache Miss Rate Block Size $($bytes$)$

$200500\mathrm{.}40\%2\%64$

a$.$ For a write through, write allocate cache, what are the minimum read and write bandwidths $($measured by byte per cycle$)$ needed to achieve a CPI of $2?(6$ pts$)$

read bandwidths : $\_\_\_\_$ write bandwidths : $\_\_\_\_$

b$.$ For a writeback, write allocate cache, assuming $30\%$ of replaced data cache blocks are dirty, what are the minimal read and write bandwidths needed for a CPI of $2?(6$ pts$)$

read bandwidths : $\_\_\_\_$ write bandwidths : $\_\_\_\_$Consider the following program and cache behaviors.

a$.$ For a write through, write allocate cache, what are the minimum read and

write bandwidths $($measured by byte per cycle$)$ needed to achieve a CPI of

$2?(6$ pts$)$

read bandwidths: $,$ write bandwidths :

b$.$ For a writeback, write allocate cache, assuming $30\%$ of replaced data cache

blocks are dirty, what are the minimal read and write bandwidths needed

for a CPI of $2?(6$ pts