$[4$ points$]$ We want to evaluate the processor with one cache. The processor$$s

base CPI is $1$ and clock rate is $4$ GHz$.$ Assume that the miss rate per

instruction is $2\%$ and main memory access time is $100$ns$.$

$1.$ What is an effective CPI $($total CPI$)$ with one level caching? $($Total CPI

$=$ Base CPI $+$ Memory$-$stall cycles per instruction$)$

$2.$ We want to add one more cache $($L$-2$ cache$)$ to the same system

presented in question # $1$ and evaluate it$.$ Its access time is $5$ ns and

global miss rate to main memory is $0\mathrm{.}5\%.$ What is an effective CPI

$($total CPI$)$ with two level caching? $($Total CPI $=$ Base CPI $+$ Primary

stalls per instruction $+$ Secondary stalls per instruction$)$