Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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1. Consider two different machines, with two different instruction sets, both of which
have a clock rate of 300 MHz. The following measurements are recorded on the two
machines running a given set of benchmark programs:
Instruction Type
Instruction Count
Cycles per instruction
(CPI)
(millions)
Machine A
Arithmetic and Logic
Load and Store
8
1
3
Branch
2
4
Others
4
4
Machine B
Arithmetic and Logic
Load and Store
Branch
Others
10
1
8
2
4
4
6
a. Determine the effective average CPI, MIPS rate, and execution time for each
machine.
b. Comment on the comparison between the MIPS and CPI for both machines.
2. (a) How many instruction bits are required to specify the following:
(i)
Two operand registers and one result register in a machine that has 128
general-purpose registers?
(ii)
Three memory addresses in a machine with 256 KB of main memory?
(b) Data movement within the CPU can be performed in several different ways.
Contrast the following methods in terms of their advantages and disadvantages:
(i) One-bus datapath
(ii) Two-bus datapath
(iii) Point-to-point interconnect
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Transcribed Image Text:1. Consider two different machines, with two different instruction sets, both of which have a clock rate of 300 MHz. The following measurements are recorded on the two machines running a given set of benchmark programs: Instruction Type Instruction Count Cycles per instruction (CPI) (millions) Machine A Arithmetic and Logic Load and Store 8 1 3 Branch 2 4 Others 4 4 Machine B Arithmetic and Logic Load and Store Branch Others 10 1 8 2 4 4 6 a. Determine the effective average CPI, MIPS rate, and execution time for each machine. b. Comment on the comparison between the MIPS and CPI for both machines. 2. (a) How many instruction bits are required to specify the following: (i) Two operand registers and one result register in a machine that has 128 general-purpose registers? (ii) Three memory addresses in a machine with 256 KB of main memory? (b) Data movement within the CPU can be performed in several different ways. Contrast the following methods in terms of their advantages and disadvantages: (i) One-bus datapath (ii) Two-bus datapath (iii) Point-to-point interconnect
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