Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

10 Questions

0 Views

Performance of Threads as Interrupts

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What does the thread library do when a system call is made to change the signal mask for a particular signal?

Instructs the user level threads to update their signal mask

Enables the signal for all kernel level threads simultaneously

Disables the signal for all kernel level threads simultaneously

Changes the signal mask for each kernel level thread one by one (correct)

In the context of signal handling, why are updates of the signal mask considered cheap?

They do not affect the performance of the thread library (correct)

Signals themselves occur more frequently

They occur at the kernel level

They require frequent system calls

When a user level thread decides to re-enable a particular signal, what action does the user level library take?

Instructs kernel level threads to avoid updating their signal masks

Notifies the kernel level thread to update its signal mask for that specific signal (correct)

Halts all system calls temporarily

Instructs kernel level threads to disable all signals

Why does updating the signal mask for each kernel level thread one by one optimize performance?

It reduces system call overhead Signup and view all the answers

What is the reason behind the need to update signal masks for kernel level threads one by one?

To optimize performance in handling signals Signup and view all the answers

How does the user level library optimize for the common case in managing signals?

By updating signal masks less frequently than handling signals Signup and view all the answers

What distinguishes updates of the signal mask from handling signals directly?

Signal handling involves system calls Signup and view all the answers

In managing signals, why are updates of the signal mask made at the user level?

To avoid kernel-level changes Signup and view all the answers

Why does each kernel level thread have its signal mask updated individually?

To optimize performance and reduce system call overhead Signup and view all the answers

What is the primary reason for running through the process of updating signal masks for each kernel level thread one by one as signals come in?

Optimizing performance as signals are received Signup and view all the answers