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What is the impact of adding the cache memory on the CPU performance?

$-$A$)$ It decreases the performance due to higher power consumption.

$-$B$)$ It increases the performance by reducing the time needed to access frequently used data.

$-$C$)$ It has no effect on the CPU performance.

$-$D$)$ It complicates the CPU architecture without any performance gain.

Question $2$: Calculate the following $($Write the complete solution line$-$by$-$line, include the used equations and units$).1.$ Consider two computers, Computer A and Computer B$,$ that are being compared based on their performance in executing a particular program. Computer A has a clock cycle time of $300$ picoseconds $($ps$)$ and a Cycles Per Instruction $($CPI$)$ of $1\mathrm{.}8,$ while Computer B has a clock cycle time of $600$ nanoseconds $($ns$)$ and a CPI of $1\mathrm{.}3.$

Which computer is faster in executing the program, and by how much?

Suppose you are designing a new processor, and your goal is to achieve a $20\%$ reduction in execution time over the current design. If the current design has a clock rate of $3$ GHz $,$ what should be the target clock rate if the CPI increases by $10\%$ in the new design?

Consider two instruction sequences for a program running on a CPU with a clock rate of $3$ GHz $.$ Sequence $1$ has an instruction count of $1$ million and an average CPI of $2\mathrm{.}0.$ Sequence $2$ has an instruction count of $800,000$ and an average CPI of $2\mathrm{.}5.$

Calculate the total CPU execution time for each sequence and determine which sequence is more efficient.

CS $414-$ Chapter $-1$ assignment.docx

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