Deadlocks: The deadlock denotes a situation where a collection of threads remains blocked. It denotes waiting for a condition that would never be true. The progress graph denotes invaluable tool for understanding deadlock. If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap. If any execution trajectory reaches deadlock state “d” then no further progress will be possible. In this case each thread waits for the other one for a “V” operation that never occurs. The overlapping forbidden regions would induce a set of states called “deadlock region”. The deadlock is inevitable is trajectory touches a state in deadlock region. Once it enters deadlock regions, the trajectories could never leave. Mutex lock ordering rule: A program is deadlock-free if each thread acquires its mutexes in order. It releases them in reverse order and given a total ordering for all mutexes. The mutex should be achieved in order to ensure deadlock free scheme.

Question

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Answer 1

Question

Chapter 12, Problem 12.30HW

A.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

B.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

C.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The forbidden regions that are overlapping would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

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Specifications: Part-1Part-1: DescriptionIn this part of the lab you will build a single operation ALU. This ALU will implement a bitwise left rotation. Forthis lab assignment you are not allowed to use Digital's Arithmetic components.IF YOU ARE FOUND USING THEM, YOU WILL RECEIVE A ZERO FOR LAB2!The ALU you will be implementing consists of two 4-bit inputs (named inA and inB) and one 4-bit output (named out). Your ALU must rotate the bits in inA by the amount given by inB (i.e. 0-15).Part-1: User InterfaceYou are provided an interface file lab2_part1.dig; start Part-1 from this file.NOTE: You are not permitted to edit the content inside the dotted lines rectangle.Part-1: ExampleIn the figure above, the input values that we have selected to test are inA = {inA_3, inA_2, inA_1, inA_0} = {0, 1, 0,0} and inB = {inB_3, inB_2, inB_1, inB_0} = {0, 0, 1, 0}. Therefore, we must rotate the bus 0100 bitwise left by00102, or 2 in base 10, to get {0, 0, 0, 1}. Please note that a rotation left is…

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Answer 2

Question

Chapter 12, Problem 12.30HW

A.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

B.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

C.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The forbidden regions that are overlapping would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

Expert Solution & Answer

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See solution

Answer 3

Question

Chapter 12, Problem 12.30HW

A.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

B.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

C.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The forbidden regions that are overlapping would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 12, Problem 12.30HW

A.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

B.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

C.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The forbidden regions that are overlapping would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 5

Chapter 12, Problem 12.30HW

A.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

B.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

C.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The forbidden regions that are overlapping would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

Answer 6

Chapter 12, Problem 12.30HW

A.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

Answer 7

Chapter 12, Problem 12.30HW

A.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

Answer 8

B.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

Answer 9

B.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, the forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The overlapping forbidden regions would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

Answer 10

C.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The forbidden regions that are overlapping would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

Answer 11

C.

Program Plan Intro

Deadlocks:

The deadlock denotes a situation where a collection of threads remains blocked.

It denotes waiting for a condition that would never be true.

The progress graph denotes invaluable tool for understanding deadlock.

If “P” and “V” operations are been ordered incorrectly, forbidden regions for two semaphores would overlap.

If any execution trajectory reaches deadlock state “d” then no further progress will be possible.

In this case each thread waits for the other one for a “V” operation that never occurs.

The forbidden regions that are overlapping would induce a set of states called “deadlock region”.

The deadlock is inevitable is trajectory touches a state in deadlock region.

Once it enters deadlock regions, the trajectories could never leave.

Mutex lock ordering rule:

A program is deadlock-free if each thread acquires its mutexes in order.

It releases them in reverse order and given a total ordering for all mutexes.

The mutex should be achieved in order to ensure deadlock free scheme.

Answer 12

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Answer 13

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Answer 14

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Answer 15

Ch. 12.1 - Prob. 12.1PP Ch. 12.1 - Prob. 12.2PP Ch. 12.2 - Practice Problem 12.3 (solution page 1036) In...Ch. 12.2 - Practice Problem 12.4 (solution page 1036) In the...Ch. 12.4 - Prob. 12.5PP Ch. 12.4 - Prob. 12.6PP Ch. 12.5 - Prob. 12.7PP Ch. 12.5 - Prob. 12.8PP Ch. 12.5 - Prob. 12.9PP Ch. 12.5 - Prob. 12.10PP

Solution Summary: The author explains that deadlock is a situation where threads remain blocked. If "P" and "V" operations are ordered incorrectly, the forbidden regions for two semaphores would overlap.

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