Given : Instruction Type 1, 2, and 3 on Machine M CPI, = 1: CPI2 = 2; CPI3 = 3 Answer with just a number' a. What is Average CPI of machine M running a program P that has 31% Type 1 instructions, 29% Type 2 instructions, and the remainder Type 3 instructions? Answer with just a number. b What is the execution time if program P has 15000 instructions and machine M has a clock rate o 4 GHz? Answer in microseconds, with 3 decimal places of precision. Just a number no units. c. What is the speedup if M's clock rate is improved to 5 GHz. Just a number.

Given : Instruction Type 1, 2, and 3 on Machine M CPI, = 1: CPI2 = 2; CPI3 = 3 Answer with just a number' a. What is Average CPI of machine M running a program P that has 31% Type 1 instructions, 29% Type 2 instructions, and the remainder Type 3 instructions? Answer with just a number. b What is the execution time if program P has 15000 instructions and machine M has a clock rate o 4 GHz? Answer in microseconds, with 3 decimal places of precision. Just a number no units. c. What is the speedup if M's clock rate is improved to 5 GHz. Just a number.

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter4: Processor Technology And Architecture

Section: Chapter Questions

Problem 2PE: If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the...

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Suppose we have two implementations:Machine A has a clock cycle time of 10 ns. and a CPI of 2.0. Machine B has aclock cycle time of 20 ns. and a CPI of 1.2. Which machine is faster for thisprogram, and how much in percentage? Consider that the total instruction in the program is 1x10^9 or about 1,000,000,000 set of instructions since the cycle time is running in nanoseconds.
Consider three different processors P1, P2, and P3 executing the same instructionset. P1 has a 3GHz clock rate and a CPI of 1.5. P2 has a 2.5GHz clock rate and a CPI of 1.0, P3has a 4GHz and a CPI of 2.5.a) Which processor has the highest performance expressed in instructions per second?b) If the processors each execute a program in 5 seconds, find the number of cycles and thenumber of instructions.c) We are trying to reduce the execution time by 20% but this leads to an increase of 15% inthe CPI. What clock rate should we have to get this time reduction?
Consider a machine with three instruction classes and CPI measurements as follows: Instruction class CPI of the instruction class A 2 B 5 C 7 Suppose that we measured the code for a given program in two different compilers and obtained the following data: Code sequence Instruction counts (in millions) A B C 1 15 5 3 2 25 2 2 Assume that the machine’s clock rate is 500 MHz. Which code sequence will execute faster according to MIPS? How much according to execution time of each code sequence?
The following table shows the number of instructions for a program with two sequences:Arith Store Load Branch Totala. 650 100 600 50 1400b. 750 250 500 500 2000Assuming that arith instructions take 1 cycle, load and store 5cycles, and branches 2 cycles, and the clock rate is 2 GHz processor.a. Which one is faster?b. Find the CPI for the sequence.b. If the number of load instructions can be reduced by one half,what is the speedup?
Q: Consider three different processors P1, P2, and P3 that support the same instruction set. P1 has a 3 GHz clock rate and a CPI of 1.5. P2 has a 2.5 GHz clock rate and a CPI of 1.0. P3 has a 4.0 GHz clock rate and has a CPI of 2.2. (a) Which processor has the highest performance expressed in instructions per second? Show your calculations. (b) If the processors each execute a program in 10 seconds, find the number of cycles and the number of instructions for each processor. (c) We are trying to reduce the execution time by 30% (i.e., execution time is reduced from 10 seconds to 7 seconds). However, this leads to an increase of 20% in the CPI. For each processor, what clock rate should we have to get this time reduction? (Show the calculations you did to answer this question.)
Consider three different processors P1, P2, and P3 executing the same instruction set. P1 has a 3 GHz clock rate and a CPI of 1.5. P2 has a 2.5 GHz clock rate and a CPI of 1.0. P3 has a 4.0 GHz clock rate and has a CPI of 2.2. Which processor has the highest performance expressed in instructions per second? If the processors each execute a program in 10 seconds, find the number of cycles and the number of instructions.
Consider three different processors P1, P2, P3 executing the same set of instructions. P1has a 3 GHz clock rate and a CPI of 1.5. P2 runs at 2 GHz and has a CPI of 1.2. P3 has a 4GHz clock rate and a CPI of 2.4.a. Which processor has the highest performance in terms of instructions per second?b. If each processor executes a program in 5 second, find the number of cycles and thenumber of instructions for each processor.c. We would like to reduce the execution time by 20%. This will, however, increasethe CPI by 25%. What clock rate do we need to obtain this amount of timereduction?
Consider two different implementations, M1 and M2, of the same instruction set. There are three classes of instructions (A, B, and C) in the instruction set. M1 has a clock rate of 2.0GHz and M2 has a clock rate of 2.5GHz. The average number of cycles for each instruction class and their frequencies (for a typical program) are as follow on the table. (a) Calculate the average CPI for each machine, M1, and M2.(b) Calculate the average MIPS ratings for each machine, M1 and M2
A benchmark program is run on a 40 MHz processor. The executed program consists of 80000 instruction executions, with the following instruction mix and clock cycle count: Instr. Type Instr. Count CPI Move 45000 1 Math 20000 2 fixed point 10000 3 double 5000 4 Determine the execution time for this program? Hint: you must calculate the effective CPI, and MIPS first. a. 3.175 ms b. 1.588 ms c. 1.688 ms d. 3.375 ms
Consider three different processors P1, P2, and P3 executing the same instruction set. P1 has a 3 GHz clock rate and a CPI of 1.5. P2 has a 2.5 GHz clock rate and a CPI of 1.0. P3 has a 4.0 GHz clock rate and has a CPI of 2.2. a. Which processor has the highest performance expressed in instructions per second? b. If the processors each execute a program in 10 seconds, find the number of cycles and the number of instructions. c. We are trying to reduce the execution time by 30% but this leads to an increase of 20% in the CPI. What clock rate should we have to get this time reduction?
Consider two processors P1 and P2. P1 has a clock rate of 2 GHz, average CPI of 0.8, and requires the execution of 5.0 x 10^9 instructions for a given task. P2 has a clock rate of 3 GHz, an average CPI of 1.2, and requires the execution of 6.0 x 10^9 instructions for the same task. Using the above CPI and clock rates of P1 and P2, determine the number of instructions that P2 can execute in the same time that P1 needs to execute 10.0 x 10^9 instructions.
Question: Suppose a program of 600 instructions runs on a 2 GHz processor. The frequency of instructions and the clock cycle counts per instruction are given as follows. What is the average CPI of this instruction mix? Operation Frequency Clock Cycles ALU operations 55% 1 Loads/Stores 30% 2 Branches 15% 3 Question: Continue from the previous question. What is the CPU time of the program in nanoseconds? Question: Suppose a processor P has a 2.5 GHz clock rate and a CPI of 1.5. If the processor executes a program in 3 microseconds, find the number of instructions in the program.