OS - Thread
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This document provides an overview of threads and processes. It defines a process as an executable file and thread as a function within a process. Each process has its own address space and resources, while each thread has its own program counter, stack, and registers. It discusses single-threaded and multi-threaded processes, as well as user space and kernel space. The document also covers concurrency on single-core and multi-core systems, different threading models (many-to-one, one-to-one, many-to-many), and benefits of multi-threading like responsiveness and resource sharing. Finally, it briefly discusses user threads, kernel threads, and common thread libraries.
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OS - Thread
- 1. Threads Organized By: Vinay Arora Assistant Professor CSED, TU Vinay Arora CSED
- 2. Disclaimer This is NOT A COPYRIGHT MATERIAL Content has been taken mainly from the following books: Operating Systems Concepts By Silberschatz & Galvin, Operating Systems: Internals and Design Principles By William Stallings www.os-book.com www.cs.jhu.edu/~yairamir/cs418/os2/sld001.htm www.personal.kent.edu/~rmuhamma/OpSystems/os.html http://msdn.microsoft.com/en-us/library/ms685096(VS.85).aspx http://www.computer.howsttuffworks.com/operating-system6.htm http://williamstallings.com/OS/Animations.html Etc… Vinay Arora CSED
- 3. Thread Application - Set of Multiple Processes Process – An Executable File (.exe) Each PROCESS has its own Address Space, CPU Quota, Access to Hardware Resources and Kernel Resources THREAD – Function Present within Executable File Each THREAD has its own PC, Stack , Registers Vinay Arora CSED
- 4. Process Thread View Vinay Arora CSED
- 5. Process View Vinay Arora CSED
- 6. Thread View Vinay Arora CSED
- 7. Processes & Threads Vinay Arora CSED
- 8. User Space & Kernel Space Vinay Arora CSED
- 9. Multicore Programming Multi-Core Systems putting pressure on programmers, challenges include Dividing activities Balance Data splitting Data dependency Testing and debugging Vinay Arora CSED
- 10. Concurrent Execution on a Single-core System Vinay Arora CSED
- 11. Concurrent Execution on a Multi-core System Vinay Arora CSED
- 12. Pure User Level Vinay Arora CSED
- 13. Pure Kernel Level Vinay Arora CSED
- 14. Combined Vinay Arora CSED
- 15. Combined Threads Vinay Arora CSED
- 16. Single & Multi Threaded Process Vinay Arora CSED
- 17. Benefits Responsiveness Resource Sharing Economy Utilization of MP Architectures Vinay Arora CSED
- 18. User Thread & Kernel Thread User Thread - Thread Management done by User-Level Threads Library Kernel Thread - Supported by the KERNEL Examples Windows XP/2000 Solaris Linux Tru64 UNIX Mac OS X Vinay Arora CSED
- 19. Thread Library Three Primary Thread Libraries: Java Threads Pthreads Win32 Threads Vinay Arora CSED
- 20. Multi Threading Models Many-to-One One-to-One Many-to-Many Vinay Arora CSED
- 21. Many-to-One Model Many User-Level Threads mapped to Single Kernel Thread Examples: Solaris Green Threads Vinay Arora CSED
- 22. One-to-One Model Each User-Level Thread maps to KERNEL THREAD Examples Linux Solaris 9 and later Windows NT/XP/2000 Vinay Arora CSED
- 23. 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 Windows NT/2000 Vinay Arora CSED
- 24. Thnx… Vinay Arora CSED