'Lock lock' presentation slideshows

OMSE 510: Computing Foundations 7: More IPC & Multithreading

1.89k views • 176 slides

Concurrent Objects

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Mutual Exclusion

Mutual Exclusion. Mutual Exclusion. We will clarify our understanding of mutual exclusion We will also show you how to reason about various properties in an asynchronous concurrent setting. Mutual Exclusion. Formal problem definitions Solutions for 2 threads Solutions for n threads

1.34k views • 114 slides

666 views • 65 slides

Monitors, Condition Variables, and Readers-Writers

Monitors, Condition Variables, and Readers-Writers. Sarah Diesburg Operating Systems COP 4610. Motivation for Monitors. Semaphores are a big step from the low-level loads and stores However, semaphores are used for both mutual exclusion and scheduling

762 views • 59 slides

Synchronization

Synchronization. Synchronization Motivation. Thread 1 p = someFn (); isInitialized = true; . Thread 2 while (! isInitialized ) ; q = aFn(p ); if q != aFn(someFn ()) panic. Too Much Milk Example. Definitions.

439 views • 38 slides

CS514: Intermediate Course in Operating Systems

CS514: Intermediate Course in Operating Systems. Professor Ken Birman Krzys Ostrowski: TA. Today. Multicore! Hardware trends Issues in taking advantage of multicore Can we adapt transactional constructs to make it easier to program multicore machines?

467 views • 35 slides

Scaling Model Checking of Dataraces Using Dynamic Information

Scaling Model Checking of Dataraces Using Dynamic Information. Ohad Shacham Tel Aviv University IBM Haifa Lab. Mooly Sagiv Tel Aviv University. Assaf Schuster Technion. Datarace. Happens when two threads access a memory location concurrently At least one access is a write

380 views • 31 slides

Java Concurrency

512 views • 27 slides

p Calculus

p Calculus. Reasoning about concurrency and communication (Part 2). big. little. 1p. 2p. collect. A Process with Alternative Behavior.

269 views • 17 slides

Chapter 28 Locks

310 views • 16 slides

Classic Synchronization Problems

Classic Synchronization Problems. Classic Synchronization E xamples. Dining philosophers Readers and writers. The Dining Philosophers Problem. Five philosophers sit at a table A fork lies between every pair of philosophers

274 views • 11 slides

15 ,30 & 60 Litres Plastic Storage Box, Set of 3 by Lock & Lock

LOCK Storage Goods have various categories with great functionality and design. They can be used anywhere including the bedroom, living room, children room or office. After the transformation to efficient space use, you will want to stay in the new space. You can check out more storage boxes online at Pepperfry here - https://www.pepperfry.com/home-utilities-storage-boxes.html

65 views • 6 slides

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) {

129 views • 5 slides

?? ????? ?? message queue semaphore shared memory fcntl ? ??? ??? ?? - ??? - ???

271 views • 4 slides