3. A program executes 200 billion instructions. It executes on an IBM processor that has an average CPI of 1.2 and a clock frequency of 4.0 GHz. How many seconds does the program take to execute? What is the cycle time of this IBM processor? Assume that an ARM processor takes 80 seconds to execute the program. What is the speedup provided by the IBM processor, relative to the ARM processor?
1. System A takes 80 seconds to run a
run on a new system B. What is the speedup provided by B over A? What is the
performance improvement (percentage of performance improvement) of B over A?
2. Anna designs a 2.5 GHz processor where two important programs, A and B, take one
second each to execute. Each program has a CPI of 1.25. Elsa is tasked with designing
the company's next-generation processor and she comes up with an idea that improves
the CPI of A to 1.1 and the CPI of B to 0.9. But the idea is so complex that the
processor can only be implemented with a cycle time of 0.5 ns. Does Elsa's new
processor out-perform Anna's processor on program A? How about on program B?
3. A program executes 200 billion instructions. It executes on an IBM processor that has
an average CPI of 1.2 and a clock frequency of 4.0 GHz. How many seconds does the
program take to execute? What is the cycle time of this IBM processor? Assume that
an ARM processor takes 80 seconds to execute the program. What is the speedup
provided by the IBM processor, relative to the ARM processor?
4. The table below (pic attached) describes the performance of two processors, the AMD Ryzen and
the X86, and two compilers on a common 'benchmark' program.
Which is the best compiler-machine combination? (10 points)
5. Consider two different implementations of the same instruction set architecture. The
instructions can be divided into four classes according to their CPI (class A, B, C, and
D). P1 with a clock rate of 2.5 GHz and CPIs of 1, 2, 3, and 3, and P2 with a clock
rate of 3 GHz and CPIs of 1, 2, 2, and 2.Given a program with a dynamic instruction
count of 106 instructions divided into classes as follows: 10% class A, 20% class B,
50% class C, and 20% class D, which is faster: P1 or P2?
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