Ch5 threads galvin
Download as PPT, PDF1 like201 views
This document discusses threads and multithreading models. It covers user threads which are managed by a user-level library, and kernel threads which are supported by the operating system kernel. The main multithreading models are described as many-to-one, one-to-one, and many-to-many. Specific threading implementations for Pthreads, Solaris, Windows, Linux and Java are also summarized.
Ch5 threads galvin
- 1. Silberschatz, Galvin and Gagne ©20025.1 Chapter 5: Threads Overview Multithreading Models Threading Issues Pthreads Solaris 2 Threads Windows 2000 Threads Linux Threads Java Threads
- 2. Silberschatz, Galvin and Gagne ©20025.2 Single and Multithreaded Processes
- 3. Silberschatz, Galvin and Gagne ©20025.3 Benefits Responsiveness Resource Sharing Economy Utilization of MP Architectures
- 4. Silberschatz, Galvin and Gagne ©20025.4 User Threads Thread management done by user-level threads library Examples - POSIX Pthreads - Mach C-threads - Solaris threads
- 5. Silberschatz, Galvin and Gagne ©20025.5 Kernel Threads Supported by the Kernel Examples - Windows 95/98/NT/2000 - Solaris - Tru64 UNIX - BeOS - Linux
- 6. Silberschatz, Galvin and Gagne ©20025.6 Multithreading Models Many-to-One One-to-One Many-to-Many
- 7. Silberschatz, Galvin and Gagne ©20025.7 Many-to-One Many user-level threads mapped to single kernel thread. Used on systems that do not support kernel threads.
- 8. Silberschatz, Galvin and Gagne ©20025.8 Many-to-One Model
- 9. Silberschatz, Galvin and Gagne ©20025.9 One-to-One Each user-level thread maps to kernel thread. Examples - Windows 95/98/NT/2000 - OS/2
- 10. Silberschatz, Galvin and Gagne ©20025.10 One-to-one Model
- 11. Silberschatz, Galvin and Gagne ©20025.11 Many-to-Many Model Allows many user level threads to be mapped to many kernel threads. Allows the operating system to create a sufficient number of kernel threads. Solaris 2 Windows NT/2000 with the ThreadFiber package
- 12. Silberschatz, Galvin and Gagne ©20025.12 Many-to-Many Model
- 13. Silberschatz, Galvin and Gagne ©20025.13 Threading Issues Semantics of fork() and exec() system calls. Thread cancellation. Signal handling Thread pools Thread specific data
- 14. Silberschatz, Galvin and Gagne ©20025.14 Pthreads a POSIX standard (IEEE 1003.1c) API for thread creation and synchronization. API specifies behavior of the thread library, implementation is up to development of the library. Common in UNIX operating systems.
- 15. Silberschatz, Galvin and Gagne ©20025.15 Solaris 2 Threads
- 16. Silberschatz, Galvin and Gagne ©20025.16 Solaris Process
- 17. Silberschatz, Galvin and Gagne ©20025.17 Windows 2000 Threads Implements the one-to-one mapping. Each thread contains - a thread id - register set - separate user and kernel stacks - private data storage area
- 18. Silberschatz, Galvin and Gagne ©20025.18 Linux Threads Linux refers to them as tasks rather than threads. Thread creation is done through clone() system call. Clone() allows a child task to share the address space of the parent task (process)
- 19. Silberschatz, Galvin and Gagne ©20025.19 Java Threads Java threads may be created by: Extending Thread class Implementing the Runnable interface Java threads are managed by the JVM.
- 20. Silberschatz, Galvin and Gagne ©20025.20 Java Thread States