Consider three different processors P1, P2, P3 executing the same set of instructions. P1 has 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 4 GHz 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 the number of instructions for each processor. c. We would like to reduce the execution time by 20%. This will, however, increase the CPI by 25%. What clock rate do we need to obtain this amount of time reduction?

Consider three different processors P1, P2, P3 executing the same set of instructions. P1 has 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 4 GHz 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 the number of instructions for each processor. c. We would like to reduce the execution time by 20%. This will, however, increase the CPI by 25%. What clock rate do we need to obtain this amount of time reduction?

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter4: Processor Technology And Architecture

Section: Chapter Questions

Problem 1RP

See similar textbooks

Similar questions

Processor R is a 64-bit RISC processor with a 2 GHz clock rate. The average instruction requires one cycle to complete, assuming zero wait state memory accesses. Processor C is a CISC processor with a 1.8 GHz clock rate. The average simple instruction requires one cycle to complete, assuming zero wait state memory accesses. The average complex instruction requires two cycles to complete, assuming zero wait state memory accesses. Processor R can’t directly implement the complex processing instructions of Processor C. Executing an equivalent set of simple instructions requires an average of three cycles to complete, assuming zero wait state memory accesses. Program S contains nothing but simple instructions. Program C executes 70% simple instructions and 30% complex instructions. Which processor will execute program S more quickly? Which processor will execute program C more quickly? At what percentage of complex instructions will the performance of the two processors be equal?
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, 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 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?
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 3.1 GHz clock rate and a CPI (cycles per instruction) of 1.6. P2 has a 2.4 GHz clock rate and a CPI of 1.2. P3 has a 4.0 GHz clock rate and has a CPI of 2.0 If you could answer these id appreciate that greatly. 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. Does the processor with the highest clock rate have a better performance? Justify your answer.
Suppose two CPU A and B have exactly the same circuits, but different clock frequencies. Answer the following questions: a) If the clock frequency of CPU A is 8MHz, how long is one clock cycle of CPU A? b) If the CPU A can execute 0.4 million instructions per second on average, how long is the average time to execute one instruction? c) What is the average number of clock cycle to execute one instruction for CPU A? d) The frequency of CPU B is 12MHz. What is the average number of instructions that can be executed per second?
5. Consider three different processors P1, P2, and P3 executing the sameinstruction set. P1 has a 3 GHz clock rate and a CPI of 1.5. P2 has a 2.5 GHzclock 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 persecond?
Please solve and show all work and steps. 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 3 GHz clock rate and a CPI of 1.0. P3 has a 4.0 GHz clock rate and a CPI of 2.2. Which processor has the highest performance expressed in instructions per second? If the processors each execute a program in 15 seconds, find the number of cycles and the number of instructions?
Suppose we had a processor design with 5 stages where each stage takes the following amount of time: IF: 400 ps ID: 200 ps EX: 300 ps MEM: 500 ps WB: 200 psQ1: If you choose a pipelined design, what is the CPI? Assume that we have enough instructions such that the brief ramp up period at the beginning and the ramp down period at the end with less than 100% utilization does not matter. Q2: If you choose a pipelined design, what is the average execution time per instruction in picoseconds?
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.