Podcast
Questions and Answers
The concurrent residency of more than one program in the main memory is referred to as multiprogramming.
The concurrent residency of more than one program in the main memory is referred to as multiprogramming.
True
The main objective of multiprogramming is to maximize CPU utilization and efficiently manage the main memory.
The main objective of multiprogramming is to maximize CPU utilization and efficiently manage the main memory.
True
What is the concept where a process is divided into several sub-processes called as threads, each thread is independent and has its own path of execution with enabled inter thread communication?
What is the concept where a process is divided into several sub-processes called as threads, each thread is independent and has its own path of execution with enabled inter thread communication?
Multithreading
Which of the following is NOT a benefit of multithreading?
Which of the following is NOT a benefit of multithreading?
Signup and view all the answers
What is the purpose of a thread pool?
What is the purpose of a thread pool?
Signup and view all the answers
What is the name of the compiler directives and API used for parallel programming in shared-memory environments?
What is the name of the compiler directives and API used for parallel programming in shared-memory environments?
Signup and view all the answers
Grand Central Dispatch is an Apple technology used only in Mac OS X operating system.
Grand Central Dispatch is an Apple technology used only in Mac OS X operating system.
Signup and view all the answers
What is the name of a virtual processor that is used to schedule user threads to run in an M:M or Two-Level threading model?
What is the name of a virtual processor that is used to schedule user threads to run in an M:M or Two-Level threading model?
Signup and view all the answers
Windows threads are managed by the operating system kernel, while Java threads are managed by the Java Virtual Machine (JVM).
Windows threads are managed by the operating system kernel, while Java threads are managed by the Java Virtual Machine (JVM).
Signup and view all the answers
Linux refers to threads as tasks.
Linux refers to threads as tasks.
Signup and view all the answers
The fork() system call creates a copy of the calling thread, while the exec() system call replaces the current process with a new one.
The fork() system call creates a copy of the calling thread, while the exec() system call replaces the current process with a new one.
Signup and view all the answers
A signal handler is used to handle the signal, and every signal has a default handler that the kernel runs when handling the signal.
A signal handler is used to handle the signal, and every signal has a default handler that the kernel runs when handling the signal.
Signup and view all the answers
Thread cancellation can be either asynchronous or deferred, and the default type is asynchronous cancellation.
Thread cancellation can be either asynchronous or deferred, and the default type is asynchronous cancellation.
Signup and view all the answers
Thread local storage (TLS) is a mechanism that allows each thread to have its own copy of data that is not accessible by other threads in the process.
Thread local storage (TLS) is a mechanism that allows each thread to have its own copy of data that is not accessible by other threads in the process.
Signup and view all the answers
The primary API for the Windows operating system is called the Windows API.
The primary API for the Windows operating system is called the Windows API.
Signup and view all the answers
Study Notes
Chapter 4: Threads
- Threads are fundamental units of CPU utilization in multithreaded computer systems.
- Multicore programming is challenging due to dividing activities, maintaining balance, and handling data dependencies.
- Multiprogramming (multitasking) allows multiple programs to be in memory simultaneously. This improves CPU utilization, but requires sufficient memory.
- Multiprogramming improves resource utilization; results in better throughput and lesser response time than uniprogramming, which executes only one program at a time.
- Multiprocessing uses multiple processors to complete tasks simultaneously; this improves speed.
- Multithreading is a programming paradigm where a process is divided into smaller sub-processes (threads). Threads share process resources.
- Threads support responsiveness, resource sharing, economy, and scalability.
- Multithreading is more efficient than processes for task-switching, because thread switching is cheaper than process switching.
- Multithreading is more efficient than message passing.
- Common multithreading models include many-to-one, one-to-one, many-to-many.
- Thread libraries (POSIX Pthreads, Windows threads, Java threads) provide programmers with APIs to create and manage threads.
- Amdahl's Law illustrates the effect of a serial portion of an application on overall performance improvement when adding more processing cores.
- Some thread issues include semantics, signals, cancellation, thread-local storage.
- There are different types of thread cancellation, asynchronous and deferred, which affect thread execution.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Explore the core concepts of threads in multithreading within chapter 4. Understand the significance of CPU utilization, multitasking, and the benefits of multithreading over traditional processes. This quiz covers the challenges of multicore programming and multiprocessing techniques.
