'File descriptors' diaporamas de présentation

POSIX Threads Programming

POSIX Threads Programming. The following is extracted from a tutorial by Blaise Barney at Livermore Computing (Lawrence Livermore National Labs) The URL for this tutorial is https://computing.llnl.gov/tutorials/pthreads/.

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Poject1

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T4-Input/Output Management

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Working with the BASH shell

Working with the BASH shell. Unit objectives Redirect the input and output of a command Identify, manipulate, create and export shell variables and edit environment files to create variables

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UNIX Process

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NSPR API Overview

NSPR API Overview . Srinivas Lingutla Wan-Teh Chang Lawrence Hardiman. NSPR 2.0. Netscape Portable Runtime Provides OS/system-level services with a platform- independent API. General purpose platform for use by clients and servers Supported on a large number of platforms including

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Chapter 6.2 DFS Design and Implementation

Chapter 6.2 DFS Design and Implementation. Brent R. Hafner. File Concept. OS abstracts from the physical storage devices to define a logical storage unit: File Types: Data: numeric, alphabetic, alphanumeric, binary Program: source and object form. Logical components of a file.

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Recitation

Recitation. By yzhuang , sseshadr. Agenda. Debugging practices GDB Valgrind Strace Errors and Wrappers System call return values and wrappers Uninitialization malloc () related bugs System IO. Debugging Practices. General Debugging.

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Chapter 12

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Agenda

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Operating Systems and Linux

Operating Systems and Linux. Partha Sarathi Dasgupta MIS Group Indian Institute of Management Calcutta. Partitions. Major partitions on a Linux system: data partition : normal Linux system data, including the root partition containing all the data to start up and run the system

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PROCESSES

PROCESSES. Concurrency and Process. What is concurrency? Process concurrency Decompose complex problems into simple ones The result: pseudoparallelism How do you check what processes are currently running at the computer?. Process Parallelism. Virtualization I/O parallelism

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Virtual File System in Linux (Chap. 12 in Understanding the Linux Kernel)

Virtual File System in Linux (Chap. 12 in Understanding the Linux Kernel). J. H. Wang Nov. 22, 2011. Outline. Role of VFS VFS Data Structures Filesystem Types Filesystem Handling Pathname Lookup Implementation of VFS System Calls File Locking. Role of VFS.

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Operating Systems IPC Unix Case Study: Pipes

Operating Systems IPC Unix Case Study: Pipes. Unix IPC. Shared memory. Process. Process. Process. Process. Process. Process. Shared info. Kernel. filesystem. Unix IPC. Message passing Pipes FIFOs Message queues Synchronization Mutexes Condition variables read-write locks

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Operating Systems Engineering

Operating Systems Engineering. Recitation 2: OS Organization. Based on MIT 6.828 (2012, lec3). Overall OS Design. Two major aspects: What should the main components be? What should the interfaces look like? To answer that, we need to ask: Why have an OS at all? Why not a library?.

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Processes, Unix, and IPC

Processes, Unix, and IPC. Today. Welcome back Midterm scores are on the Web; Lab #4 is where you left it. Today we continue with process management topics. last time : address space creation/initialization today : process interactions and synchronization

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Deadlocks, Message Passing Brief refresh from last week

Deadlocks, Message Passing Brief refresh from last week. Tore Larsen Oct. 2010. Deadlocks. Formal definition : A set of processes is deadlocked if each process in the set is waiting for an event that only another process in the set can cause

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CSC 552.201 - Advanced Unix Programming, Fall, 2008

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Multiplexed I/O

Multiplexed I/O. Motivation. Consider a process that reads from multiple sources without knowing in advance which source will provide some input first Three solutions: alternate non-blocking reads on input sources (wasteful of CPU)

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