EBK CONCEPTS OF PROGRAMMING LANGUAGES
12th Edition
ISBN: 9780135102251
Author: Sebesta
Publisher: VST
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Chapter 1, Problem 10PS
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Aspects of writing efficient
In present time the cost of hardware has reduced significantly and now a normal person can easily afford personal computers with standard hardware.
- Even though there has been downfall in the cost of hardware, but there is more effort to produce efficient and quality code.
- One reason is the execution time. Some programs like system software need to run continuously for long hours.
- So, they need to be efficient enough to meet the needs of the users. Also some may argue that instead of wasting efforts to optimize code, one can always upgrade his hardware.
- But who would want to upgrade the hardware for running just one code...
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Q.1. Architecture performance [10 marks]
Answer
A certain microprocessor requires either 2, 4, or 6 machine cycles to perform various operations.
⚫ (40+g+f)% require 2 machine cycles,
⚫ (30-g) % require 4 machine cycles, and
⚫ (30-f)% require 6 machine cycles.
(a) What is the average number of machine cycles per instruction for this microprocessor?
Answer
(b) What is the clock rate (machine cycles per second) required for this microprocessor to be a
"1000 MIPS" processor?
Answer
(c) Suppose that 35% of the instructions require retrieving an operand from memory which
needs an extra 8 machine cycles. What is the average number of machine cycles per
instruction, including the instructions that fetch operands from memory?
Chapter 1 Solutions
EBK CONCEPTS OF PROGRAMMING LANGUAGES
Ch. 1 - Why is it useful for a programmer to have some...Ch. 1 - Prob. 2RQCh. 1 - Prob. 3RQCh. 1 - Prob. 4RQCh. 1 - Prob. 5RQCh. 1 - In what language is most of UNIX written?Ch. 1 - What is the disadvantage of having too many...Ch. 1 - How can user-defined operator overloading harm the...Ch. 1 - Prob. 9RQCh. 1 - Prob. 10RQ
Ch. 1 - Describe some design trade-offs between efficiency...Ch. 1 - Prob. 12RQCh. 1 - Prob. 13RQCh. 1 - Prob. 14RQCh. 1 - Prob. 15RQCh. 1 - Prob. 16RQCh. 1 - Prob. 17RQCh. 1 - Prob. 18RQCh. 1 - Prob. 19RQCh. 1 - Prob. 20RQCh. 1 - Prob. 21RQCh. 1 - Prob. 22RQCh. 1 - Prob. 23RQCh. 1 - Prob. 24RQCh. 1 - Prob. 25RQCh. 1 - What role does the symbol table play in a...Ch. 1 - Prob. 27RQCh. 1 - Prob. 28RQCh. 1 - What are the advantages in implementing a language...Ch. 1 - Prob. 1PSCh. 1 - What are some features of specific programming...Ch. 1 - Prob. 3PSCh. 1 - Prob. 4PSCh. 1 - Prob. 5PSCh. 1 - What common programming language statement, in...Ch. 1 - Java uses a right brace to mark the end of all...Ch. 1 - Prob. 8PSCh. 1 - Explain the different aspects of the cost of a...Ch. 1 - Prob. 10PSCh. 1 - Describe some design trade-offs between efficiency...Ch. 1 - Prob. 12PSCh. 1 - Prob. 13PSCh. 1 - Prob. 14PSCh. 1 - How do type declaration statements for simple...Ch. 1 - Write an evaluation of some programming language...Ch. 1 - Prob. 17PSCh. 1 - Many contemporary languages allow two kinds of...
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- Q.2. Architecture performance [25 marks] Consider two different implementations, M1 and M2, of the same instruction set. M1 has a clock rate of 2 GHz and M2 has a clock rate of 3.3 GHz. There are two classes of instructions with the following CPIs: Class A CPI for M1 CPI for M2 2.f 1.g B 5 3 C 6 4 Note that the dots in 2 fand 1.g indicate decimal points and not multiplication. a) What are the peak MIPS performances for both machines? b) Which implementation is faster, if half the instructions executed in a certain program are from class A, while the rest are divided equally among classes B and C. c) What speedup factor for the execution of class-A instructions would lead to 20% overall speedup? d) What is the maximum possible speedup that can be achieved by only improving the execution of class-A instructions? Explain why. e) What is the clock rate required for microprocessor M1 to be a "1000 MIPS" (not peak MIPS) processor?arrow_forwardPLEASE SOLVE STEP BY STEP WITHOUT ARTIFICIAL INTELLIGENCE OR CHATGPT I don't understand why you use chatgpt, if I wanted to I would do it myself, I need to learn from you, not from being a d amn robot. SOLVE STEP BY STEP I WANT THE DIAGRAM PERFECTLY IN SIMULINKarrow_forwardI need to develop and run a program that prompts the user to enter a positive integer n, and then calculate the value of n factorial n! = multiplication of all integers between 1 and n, and print the value n! on the screen. This is for C*.arrow_forward
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