Suppose we enhance a computer to make all multiplication instructions run four times faster. If the execution time of some benchmark before enhancement is 120sec, what will the speedup be if 80sec before improvement is spent executing multiplication instructions? (the answer is a numerical value only) Answer:

Suppose we enhance a computer to make all multiplication instructions run four times faster. If the execution time of some benchmark before enhancement is 120sec, what will the speedup be if 80sec before improvement is spent executing multiplication instructions? (the answer is a numerical value only) Answer:

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter4: Processor Technology And Architecture

Section: Chapter Questions

Problem 26VE: _____ is a CPU design technique in which instruction execution is divided into multiple stages and...

See similar textbooks

Similar questions

_____ is a CPU design technique in which instruction execution is divided into multiple stages and different instructions can execute in different stages simultaneously.
How does pipelining improve CPU efficiency? What’s the potential effect on pipelining’s efficiency when executing a conditional BRANCH instruction? What techniques can be used to make pipelining more efficient when executing conditional BRANCH instructions?
Suppose we enhance a machine making all floating-point instructions run sixtimes faster. The execution time of some benchmark before the floating-pointenhancement is 20 seconds. What will the speedup be if 8 seconds is spentexecuting floating-point instructions (before the enhancement)?
Suppose we have a benchmark that executes in 100 seconds of elapsed time, of which 90 seconds is CPU time and the rest is 1/0 time. Suppose the number of processors doubles every two years, but the processors remain the same speed, and I/O time doesn't improve. How much faster will our program run at the end of six years?
Suppose a process is responsible for YZ% of the execution time on a machine. Using a particular hardware will speed up the process by a factor of 20. An alternative solution is responsible for a total of 50% of the execution time. Compare these two design alternatives. Here, Y-First digit of your roll number, and Z-Second digit of your roll number. For example, if roll number is 2012-CS-427, then YZ-42
On the other hand, it has been suggested to use a processor that can decode encrypted data and system instructions, and then execute the instructions on the decoded data and system instructions. The CPU will then encrypt the suits that have been provided. What are the advantages of using a CPU of this caliber? What are the architectural requirements for a processor of this nature?
Discuss the concept of pipelining in CPU design. How does it improve performance, and what are its limitations?
Q4. Write some code (e.g. a loop) in MIPS assembly where you would expect no speedup from a superscalar CPU over a scalar CPU. For that same code, would you expect any speedup from an out-of-order vs an in-order (superscalar) CPU?
The 'pipeline' performance improving methods that are utilised within the CPU — could you kindly discuss them in detail?
Discuss the concept of pipelining in CPU design. How does pipelining improve processor efficiency, and what are the potential challenges in its implementation?
Define pipelining in terms of increasing the speed of a processor, and then determine how many cycles it would take to run five instructions if each part of the machine required the same amount of time. In the absence of pipelining With pipelining, you may do (a), (b), (c), and (d), respectively.
Consider a group of 5 benchmarks. With an old generation of CPU in the 90s, the execution times of these benchmarks were 10 minutes, 16 minutes, 4 minutes, 1 minute and 8 minutes. With a new generation of CPU in 2020, the execution time of these benchmarks are 5 minutes, 2 minutes, 2 minutes, 15 seconds and 1 minutes. What is the average speedup of the new CPU (comparing to the old CPU)? Note that, you need to determine whether arithmetic mean or geometric mean should be used here.