Homework Answers
Note : 1 billian instructions = 1.0 x 10 ^ 9 instructions.
Similarly, All other values are converted by multiplying with 10^9
with the number. 
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Problem 3. (25 pts.) Compilers can have a profound impact on the performance of an application....
Compilers can have a profound impact on the performance of an application. Assume that for a...
Compilers can have a profound impact on the performance of an application. Assume that for a program, compiler A results in an instruction count of 1.0E9 and has an execution time of 1.1s, and compiler B results in an instruction count of 1.2E9 and 1.5s a. Find the average CPI for both compilers assuming a clock cycle time of 1ns. b. Another Compiler C creates for the same code on 6.0E8 instructions, and has an average CPI of 1.1. What...
Compller A Compler B Execution Ti Execution Time No. Instructions meNo. Instructions b. 1.9 s 1.60E+09 1.30E+09 2.1 s 1...
Compller A Compler B Execution Ti Execution Time No. Instructions meNo. Instructions b. 1.9 s 1.60E+09 1.30E+09 2.1 s 1.71 [5] <1.4> For the same program, two different compilers are used. The table above shows the execution time of the two different compiled programs. Find the average CPI for each program given that the processor has a clock cycle time of 1 ns. 1.7.2 [5] <1.4> Assume the compiled programs run on two different processors If the execution times on...
Assume that for a program, compiler A results in a dynamic instruction count of 8.0E8 and...
Assume that for a program, compiler A results in a dynamic instruction count of 8.0E8 and has an execution time of 2.4 s, while compiler B results in a dynamic instruction count of 1.25E9 and an execution time of 1.8 s. a. [10] Find the average CPI for each program given that the processor has a clock cycle time of 2 ns. b. [10] Assume the compiled programs run on two different processors. If the execution times on the two...
You look at compilers as a way to improve performance. Your outdated compiler produces an instruction...
You look at compilers as a way to improve performance. Your outdated compiler produces an instruction count of 2 times 10^9 instructions which execute in 1.3 sec. a) What is the average CPI of the program if the clock period is 0.5 ns? b) A new compiler generates only 1 times 10^9 instructions, with a CPI of 1.2. On the same processor (same clock), what speedup does the new compiler produce?
(e) Suppose we measure the code for the same program from two different compilers and obtain the following data. Assume clock rate is 3GHz, which code sequence will execute faster according to ex...
(e) Suppose we measure the code for the same program from two different compilers and obtain the following data. Assume clock rate is 3GHz, which code sequence will execute faster according to execution time? or According to MIPS? By how much? (25 pts CPI for Instructions Code from Instruction Count (billions) CPI Compiler 1 Compiler 2 9 1 3
(e) Suppose we measure the code for the same program from two different compilers and obtain the following data. Assume clock...
c. Performance: Company A's processor and Company B's processor are benchmarked on the same program. The...
c. Performance: Company A's processor and Company B's processor are benchmarked on the same program. The CPI of the component instructions that are executed in the program are shown above for each processor. Additionally, the number of instructions of each type is provided. Company A 5 Branch CPI Load/Store CPI Arithmetic CPI 7 1 Company B 4 Branch CPI Load/Store CPI Arithmetic CPI 9 1 Program Instruction Count Branch Load/Store Arithmetic CPL 1.2x109 1.67x1010 1.5x1011 i. Assume Company A has...
Make sure to show how you solved the problem step-by-step: Consider three different processors P1, P2,...
Make sure to show how you solved the problem step-by-step: Consider three different processors P1, P2, and P3, executing the same instruction set. P1 has a clock cycle time of 300 picosecond and a CPI (clock cycles per instruction) of 1.5. P2 has a clock cycle time of 400 picosecond and a CPI of 1.0. P3 has a clock cycle time of 250 picosecond and a CPI of 2.0. P1 is running a program with 10 instructions. P2 is running...
15. A given application written in Java, runs 15 seconds on a desktop computer. A new...
15. A given application written in Java, runs 15 seconds on a desktop computer. A new Java compiler is released that requires only .6 times as many instructions as the old compiler. Unfortunately, it increases the CPI by a factor of 1.1. How fast can we expect the application to run using the new compiler?! a. 15 X 0.6 = 8.2 seconds 1.1 applicatiely, it increquires only ads on a do 13x0.6 b. 15 X 1.1 = 27.5 seconds 0.6...
Assume for arithmetic, load/store, and branch instructions, a processor has CPls of 3, 15, and 7, respectively. Also as...
Assume for arithmetic, load/store, and branch instructions, a processor has CPls of 3, 15, and 7, respectively. Also assume that on a single processor a program requires the execution of 3.12E9 arithmetic instructions, 1.75E9 load/store instructions, and 512Million branch instructions. Assume that each processor has a 2.5GHz clock frequency. Assume that, as the program is parallelized to run over multiple cores, the number of arithmetic and load/store instructions per processor divided by 0.8xp ( where p is the number of...
Design and implement a C Language program that measures the performance of given processors. There are...
Design and implement a C Language program that measures the
performance of given processors.
There are several metrics that measure the performance of a
processor. We will be using the following 3 measures:
1.CPI (clock cycles per instruction) = #clock cycles
/#instructions
2.CPU execution time = #instructions x CPI x clock cycle time
.
cylce time = 1/CPU clock rate in hertz units
3.MIPS (mega instructions per second)= #instrucrions/ CPU X
1000000
Typically, processors’ performance is measured using a wide...
Compller A Compler B Execution Ti Execution Time No. Instructions meNo. Instructions b. 1.9 s 1.60E+09 1.30E+09 2.1 s 1.71 [5] <1.4> For the same program, two different compilers are used. The table above shows the execution time of the two different compiled programs. Find the average CPI for each program given that the processor has a clock cycle time of 1 ns. 1.7.2 [5] <1.4> Assume the compiled programs run on two different processors If the execution times on...
You look at compilers as a way to improve performance. Your outdated compiler produces an instruction count of 2 times 10^9 instructions which execute in 1.3 sec. a) What is the average CPI of the program if the clock period is 0.5 ns? b) A new compiler generates only 1 times 10^9 instructions, with a CPI of 1.2. On the same processor (same clock), what speedup does the new compiler produce?
(e) Suppose we measure the code for the same program from two different compilers and obtain the following data. Assume clock rate is 3GHz, which code sequence will execute faster according to execution time? or According to MIPS? By how much? (25 pts CPI for Instructions Code from Instruction Count (billions) CPI Compiler 1 Compiler 2 9 1 3
(e) Suppose we measure the code for the same program from two different compilers and obtain the following data. Assume clock...
c. Performance: Company A's processor and Company B's processor are benchmarked on the same program. The CPI of the component instructions that are executed in the program are shown above for each processor. Additionally, the number of instructions of each type is provided. Company A 5 Branch CPI Load/Store CPI Arithmetic CPI 7 1 Company B 4 Branch CPI Load/Store CPI Arithmetic CPI 9 1 Program Instruction Count Branch Load/Store Arithmetic CPL 1.2x109 1.67x1010 1.5x1011 i. Assume Company A has...
15. A given application written in Java, runs 15 seconds on a desktop computer. A new Java compiler is released that requires only .6 times as many instructions as the old compiler. Unfortunately, it increases the CPI by a factor of 1.1. How fast can we expect the application to run using the new compiler?! a. 15 X 0.6 = 8.2 seconds 1.1 applicatiely, it increquires only ads on a do 13x0.6 b. 15 X 1.1 = 27.5 seconds 0.6...
Assume for arithmetic, load/store, and branch instructions, a processor has CPls of 3, 15, and 7, respectively. Also assume that on a single processor a program requires the execution of 3.12E9 arithmetic instructions, 1.75E9 load/store instructions, and 512Million branch instructions. Assume that each processor has a 2.5GHz clock frequency. Assume that, as the program is parallelized to run over multiple cores, the number of arithmetic and load/store instructions per processor divided by 0.8xp ( where p is the number of...
Design and implement a C Language program that measures the
performance of given processors.
There are several metrics that measure the performance of a
processor. We will be using the following 3 measures:
1.CPI (clock cycles per instruction) = #clock cycles
/#instructions
2.CPU execution time = #instructions x CPI x clock cycle time
.
cylce time = 1/CPU clock rate in hertz units
3.MIPS (mega instructions per second)= #instrucrions/ CPU X
1000000
Typically, processors’ performance is measured using a wide...
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