Which processor has the highest performance expressed in instructions per second?
computer science
Description
Computer
Architecture & Organization
Rescheduled Midterm.
Date: 13 March 2020 8
April 2020 on D2L
Duration: 1.2 hours 10:00 am to 1:00 pm
Instructions:
- Answer all the
questions in the answer sheets provided
- You are allowed
to bring the RISC V instruction sheet (green)
- Wherever
necessary, explain with suitable figures.
- Draw diagrams
neatly.
- Please note that the exam has been set
for a total of 89 points. You can answer as many as you want. The total
scored points will be considered for 80 points. This gives you some
flexibility.
Name of the student:
…………………………………………………………….
Q1. Consider three different
processors P1, P2, and P3 executing the same instruction set. P1 has 3GHz clock
rate and a CPI of 1.5; P2 has a 2.5 GHz of clock rate and a CPI of 1.2; 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?
- While
trying to reduce the execution time by 30% it leads to an increase of 10%
in the CPI. What clock rate should we have to get this time reduction?
(15 points)
Q2. An AI benchmark program runs
in 10 seconds on Computer A, which has a 4 GHz clock. We have to design a
Computer B to run this program twice the speed. If this increase in speed will
cause the Computer B CPI to increase 1.2 times as many clock cycles as Computer
A, what clock rate should we target for Computer B? (10 points)
Q3. What is Moore’s law? Explain.
(5 points)
Q4. Give the starting and ending
memory address of a 4Kilo Byte memory?
(5 points)
Q5. A) Represent the following numbers
in IEEE 754 format:
X = 44.125
Y = - 11.0625
Give both single
and double precision forms. Show all the steps very clearly.
B) What decimal number does the
following IEEE 754 Standard Single precision bit pattern represent?
