1 / 20

Chapter 5: Threads

Chapter 5: Threads. Overview Multithreading Models Threading Issues Pthreads Solaris 2 Threads Windows 2000 Threads Linux Threads Java Threads. Single and Multithreaded Processes. Benefits. Responsiveness Resource Sharing Economy Utilization of MP Architectures. User Threads.

yeo-harper
Download Presentation

Chapter 5: Threads

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 5: Threads • Overview • Multithreading Models • Threading Issues • Pthreads • Solaris 2 Threads • Windows 2000 Threads • Linux Threads • Java Threads 111/19/2014

  2. Single and Multithreaded Processes 211/19/2014

  3. Benefits • Responsiveness • Resource Sharing • Economy • Utilization of MP Architectures 311/19/2014

  4. User Threads • Thread management done by user-level threads library • Examples - POSIX Pthreads - Mach C-threads - Solaris threads 411/19/2014

  5. Kernel Threads • Supported by the Kernel • Examples - Windows 95/98/NT/2000 - Solaris - Tru64 UNIX - BeOS - Linux 511/19/2014

  6. Multithreading Models • Many-to-One • One-to-One • Many-to-Many 611/19/2014

  7. Many-to-One • Many user-level threads mapped to single kernel thread. • Used on systems that do not support kernel threads. 711/19/2014

  8. Many-to-One Model 811/19/2014

  9. One-to-One • Each user-level thread maps to kernel thread. • Examples - Windows 95/98/NT/2000 - OS/2 911/19/2014

  10. One-to-one Model 1011/19/2014

  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 1111/19/2014

  12. Many-to-Many Model 1211/19/2014

  13. Threading Issues • Semantics of fork() and exec() system calls. • Thread cancellation. • Signal handling • Thread pools • Thread specific data 1311/19/2014

  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. 1411/19/2014

  15. Solaris 2 Threads 1511/19/2014

  16. Solaris Process 1611/19/2014

  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 1711/19/2014

  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) 1811/19/2014

  19. Java Threads • Java threads may be created by: • Extending Thread class • Implementing the Runnable interface • Java threads are managed by the JVM. 1911/19/2014

  20. Java Thread States 2011/19/2014

More Related