'Condition variables' diaporamas de présentation

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Programming with Shared Memory

Chapter 8. Programming with Shared Memory. Shared memory multiprocessor system Any memory location can be accessible by any of the processors. A single address space exists, meaning that each memory location is given a unique address within a single range of addresses.

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Operating Systems ECE344

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CS510 Concurrent Systems

CS510 Concurrent Systems. Introduction to Concurrency. Why is Concurrency Important?. Scaling up vs scaling out Concurrent hardware vs concurrent software. Sequential Programming with Processes. What is a Process? Private memory a program data stack heap CPU context

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Synchronization (3)

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Distributed Systems

Distributed Systems. Mutual Exclusion & Election Algorithms Paul Krzyzanowski pxk@cs.rutgers.edu ds@pk.org. Except as otherwise noted, the content of this presentation is licensed under the Creative Commons Attribution 2.5 License. Process Synchronization.

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Sleep/Wakeup and Condition Variables

Sleep/Wakeup and Condition Variables. Example: Await/Awake. Consider a very simple use of sleep/wakeup to implement two new primitives: currentThread->Await () Block the calling thread. Thread::Awake () If the target thread is sleeping in a previous Await (), wake it up.

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Pthreads : A shared memory programming model

Pthreads : A shared memory programming model. POSIX standard shared memory multithreading interface. Not just for parallel programming, but for general multithreaded programming Provide primitives for thread management and synchronization.

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Dining-Philosophers Problem

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Language Support for Concurrency

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Language Support for Concurrency

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Monitors

Monitors. CSCI 444/544 Operating Systems Fall 2008. Agenda. What is monitor? Condition variables Hoare monitor vs Mesa monitor Solution to Dining Philosophers. Background. Motivation Users can inadvertently misuse locks and semaphores E.g., never unlock a mutex

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CS162 Section 2

CS162 Section 2. True/False. A thread needs to own a semaphore, meaning the thread has called semaphore.P (), before it can call semaphore.V () False: Any thread with a reference to the semaphore can call V(). True/False.

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Nachos

Nachos. Getting the Source Code. -See CVS quickstart on COSC3407 website. On windows use putty: In the computer lab: -> start -> Math and computer science -> internet applications -> putty or open dos window: p: -> cd putty -> putty

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CSE332: Data Abstractions About the Final

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CPS 310 final exam, 12/15/2013 Your name please:

CPS 310 final exam, 12/15/2013 Your name please: . Part 1. Get with the program ( 6 0 points).

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Condition variables

Condition variables. proc notify (cvar) { acquire (tt_lock); for (i = 0 to N-1) do { if (ttable[i].cvar == cvar && ttable[i].state == WAITING) { ttable[i].state ? RUNNABLE;} } release(tt_lock);}. proc wait(cvar, lock) {

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Thread Ownership of Memory

Thread Ownership of Memory. ? Finds sharing errors at runtime. Data races. Atomicity Violations. Memory Errors. ? Supports locks but also joins, events, condition variables, etc. ? Cheap enough to keep in all debug builds. ? Ask me how!. Jean-Philippe Martin Microsoft Research.

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Concurrency, Memory Managment & Uniprocessor Scheduling Stallings OS 6 th edition Chapters 5, 7 & 9 Kevin C

Concurrency, Memory Managment & Uniprocessor Scheduling Stallings OS 6 th edition Chapters 5, 7 & 9 Kevin Curran. Part 1: Concurrency: Mutual Exclusion and Synchronization. Multiple Processes. Operating System design is concerned with the management of processes and threads:

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