PPT-Unix System Calls and Posix Threads

Overview Processrelated Unix system calls Posix threads 2 Processrelated Unix System Calls A process in U nix consists of an address space and one thread Unix provides several processrelated system calls. Single and Multithreaded Processes. Benefits. Responsiveness. A program can continue running even if part of it is blocked or waiting for long I/O. Important for user interfaces. Resource Sharing. Easier to share resources between threads (shared memory) compared to between processes. Introduction & Operating Systems. Course Description. Basics of UNIX. Matlab. Shell Scripting. Seismic Analysis Code (SAC). Generic Mapping Tool (GMT). Matlab. GUIs. C/C++, Fortran, and Compiling. Unix and Mach. Ken Birman. CS6410. 1. Unifying question for today. What should be the central design principle of a modern operating system?. Unix (now called Linux): Elegant, powerful API. . Mach: Refocus the whole system on memory segments and sharing, message passing, componentation. . 15CS35 . SEMESTER – III . 04-08-2016. Syllabus and course outcomes. Link for syllabus. Operating system. The . o. perating . s. ystem (. OS. ).  is the most important program that runs on a computer. . Unix History. Developed by Dennis Ritchie and Ken Thompson at AT&T Bell Labs. Adapted some ideas from the . Multics. project in 1969. Design Features. Written in C – portable. Application program interface (API) –. (and what is it anyway?). Part II. Bob Eager. History of UNIX – Part II. 1. Phase II – the 32 bit systems. a major turning point was the transfer to the Digital Equipment VAX ‘supermini’ systems (~1980). Threads. Exam 1 on Wednesday morning at 8:30 AM. C, Linux, . Makefiles,svn. , Chapters . 1,2, and 3 . Open book, open notes, limited computer usage. What is a thread?. A thread is a unit of dispatching within a process. . Unix History. Developed by Dennis Ritchie and Ken Thompson at AT&T Bell Labs. Adapted some ideas from the . Multics. project in 1969. Design Features. Written in C – portable. Application program interface (API) –. Today…. Project 2, Steps 1 & 2. Chapter 4: Threading. Next Time…. Chapter . 5: Mutual Exclusion. Reminders…. Homework #2 . due . 09/29. Project 2: Tasking due Thursday (10/05). National White Chocolate Day. 2. Introduction. Unix-like system is everywhere. Linux. Android for smartphones. Google Chrome OS for . Chromebook. Web servers. OS X for MacBook/iMac . etc. iOS for iPhone/iPad . etc. 3. Unix Shell. 15CS35 . SEMESTER – III . 04-08-2016. Syllabus and course outcomes. Link for syllabus. Operating system. The . o. perating . s. ystem (. OS. ).  is the most important program that runs on a computer. . Posix Threads (Pthreads) Concurrency Chapter 26 Abstraction: Threads Here we introduce a new abstraction for a single running process: that of a thread. The state of a single thread is thus very similar to that of a process. It has a program counter (PC) that tracks where the program is fetching instructions from Unix System Calls and Posix Threads Overview Process-related Unix system calls Posix threads 2 Process-related Unix System Calls A process in U nix consists of an address space and one thread Unix provides several process-related system calls: Lecture . 2. C. Operating System Structures . 2. References for . Lecture:. Abraham . Silberschatz. , Peter Bear Galvin and Greg Gagne, Operating System Concepts, 9th Edition, . Chapter . 2. . Contents of Lecture.