.NET Parallel Programming

All about Async/Await, System.Threading.Tasks, System.Collections.Concurrent, System.Linq, and more…

ParallelExtensionsExtras Tour – #3 – Additional Task Extensions Methods

April 5, 2010 Apr 5, 2010 04/5/10

Stephen Toub - MSFT

(The full set of ParallelExtensionsExtras Tour posts is available here.) In our last ParallelExtensionsExtras tour post, we discussed implementing an extension ToObservable method for Task<TResult>. This is just one of a myriad of extra pieces of functionality that are useful with Tasks, and the TaskExtrasExtensions...

ParallelExtensionsExtras Tour – #2 – Task.ToObservable

April 4, 2010 Apr 4, 2010 04/4/10

Stephen Toub - MSFT

(The full set of ParallelExtensionsExtras Tour posts is available here.) In our previous ParallelExtensionsExtras tour post, we discussed a custom implementation of the LINQ operators, in particular for working with Task<TResult> instances in an asynchronous manner. There is already an impressive implementation of the ...

ParallelExtensionsExtras Tour – #1 – LINQ to Tasks

April 4, 2010 Apr 4, 2010 04/4/10

Stephen Toub - MSFT

(The full set of ParallelExtensionsExtras Tour posts is available here.) The .NET Framework developer center provides a concise description of Language Integrated Query (LINQ):LINQ is a set of extensions to the .NET Framework that encompass language-integrated query, set, and transform operations. It extends C# and Visual Basic with ...

Parent-Child Task Relationships in the .NET Framework 4

March 27, 2010 Mar 27, 2010 03/27/10

Igor Ostrovsky - MSFT

The Task Parallel Library in the .NET Framework 4 provides an opt-in feature that enables parent-child relationships between tasks. This relationship brings with it some additional behaviors, including that a parent task is not considered completed until all of its child tasks have completed, and that exceptions from ...

FAQ :: Parallel.ForEach and non-generic collections?

March 2, 2010 Mar 2, 2010 03/2/10

Danny Shih

.NET 2.0 introduced Generics to allow enhanced code reusability and type safety. Since then, generic collections (IEnumerable<T>, List<T>, Dictionary<T>, etc.) have become standard and are recommended over their non-generic counterparts (IEnumerable, ArrayList, HashTable, etc.). As a result, Parallel.ForEach only ...

“Parallelism in .NET” Series by Reed Copsey, Jr.

February 10, 2010 Feb 10, 2010 02/10/10

Igor Ostrovsky - MSFT

Reed Copsey, Jr. has been writing a great series of articles on parallelism with the .NET Framework 4. The articles provide the insights of an expert developer who has been using parallelism with .NET to speed up real-world programs. Recommended reading.Parallelism in .NETIntroductionPart 1, Decomposition&...

Maintaining a Consistent Application State with TPL

February 9, 2010 Feb 9, 2010 02/9/10

Zlatko Michailov - MSFT

The aim of this post is to help developers writing applications in which operations may need to be performed and then later undone due to a subsequent failure. It shows a pattern for how to maintain such a consistent application state by utilizing functionality from the Task Parallel Library (TPL) in the .NET Framework 4. For the purposes of ...

FAQ :: The Debugger does not correctly handle Task exceptions?

January 11, 2010 Jan 11, 2010 01/11/10

Danny Shih

The following code correctly observes and handles a Task exception and should print “gotcha!” to the console. By default though, the Debugger will report a crash.Task t = Task.Factory.StartNew(() => { throw new Exception("poo"); }); try { t.Wait(); } catch (AggregateException) { Console.WriteLine("gotcha!"); } The issue ...

FAQ :: Why is the speedup not X on my X-way machine?

January 5, 2010 Jan 5, 2010 01/5/10

Danny Shih

We’ll be regularly posting answers to frequently asked questions that we’ve gotten on the forum, internal email lists, etc. Here’s the first – enjoy! Why is the speedup not X on my X-way machine? Or, why does my parallel code run slower? Less than ideal speedup can typically be attributed to two things: 1. ...

A Tour Through the Parallel Programming Samples for .NET 4

December 9, 2009 Dec 9, 2009 12/9/09

Stephen Toub - MSFT

On Code Gallery, we have a plethora of samples that highlight aspects of the .NET Framework 4 that help with writing scalable and efficient parallel applications. This post examines each of those samples, providing an overview of what each provides...

.NET Parallel Programming

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