.NET Parallel Programming

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

.NET 4 - .NET Parallel Programming

What’s new in Beta 2 for the Task Parallel Library? (Part 2/3)

October 27, 2009 Oct 27, 2009 10/27/09
Danny Shih
Related posts:Last week, we talked about how TPL adopted a new, better cancellation model.  Today, we’ll cover a change that makes Tasks Detached by Default, some ContinueWhenAll/Any Refactoring, and the handy UnobservedTaskException event.Tasks are Detached by DefaultIn Beta 2, we have changed an important default.  Tasks ...

What’s new in Beta 2 for the Task Parallel Library? (Part 1/3)

October 19, 2009 Oct 19, 2009 10/19/09
Danny Shih
Related posts:Visual Studio 2010 and .NET 4 Beta 2 is here!  In terms of completeness and readiness for production coding, Beta 2 promises to be much better than Beta 1, and TPL is one component that delivers significant improvements over what was previously available.  To get you excited about it, this series of posts ...

.NET 4 Beta 2 is here!

October 19, 2009 Oct 19, 2009 10/19/09
Stephen Toub - MSFT
The .NET Framework 4 Beta 2 is now available! MSDN Subscribers can download it today, and it will be generally available for download on Wednesday.  More information is available at https://msdn.microsoft.com/en-us/vstudio/dd582936.aspx.  Additionally, one of the really exciting things about this Beta release is that it’s &...

Parallel Computing Presentations in Michigan, Ohio, Kentucky, and Tennessee

October 16, 2009 Oct 16, 2009 10/16/09
Stephen Toub - MSFT
In a week, I’m going to be traveling through Michigan, Ohio, Kentucky, and Tennessee, speaking about parallel computing, Visual Studio 2010, and .NET 4, primarily at corporations during the day and at user groups in the evenings.If you’re in the area and interested, please do attend, and I look forward to meeting you!  A list ...

Parallelized Map and Filter Operations

October 12, 2009 Oct 12, 2009 10/12/09
Stephen Toub - MSFT
Common operations like map and filter are available in parallelized form through PLINQ, though the names differ.  A map can be achieved with PLINQ’s Select operator, and a filter with PLINQ’s Where operator.For example, I could implement a ParallelMap operation that takes in one array and returns another as follows: public ...

TaskScheduler.FromCurrentSynchronizationContext

September 22, 2009 Sep 22, 2009 09/22/09
Stephen Toub - MSFT
The Task abstractions in .NET 4 run on instances of the TaskScheduler class.  Two implementations of TaskScheduler ship as part of the .NET Framework 4.  The first is the default scheduler, which is integrated with the .NET 4 ThreadPool and takes advantage of its work-stealing queues.  The second is the type of TaskScheduler ...

The meaning of TaskStatus

August 30, 2009 Aug 30, 2009 08/30/09
Stephen Toub - MSFT
Every System.Threading.Tasks.Task instance goes through a lifecycle, and it only makes this journey once.  To provide insight into where in that lifecycle a given Task is, the Task class provides an instance Status property.  That property returns a value from the TaskStatus enumeration that reflects the current point in the ...

Parallel Extensions and I/O

August 4, 2009 Aug 4, 2009 08/4/09
Danny Shih
In this post, we’ll investigate some ways that Parallel Extensions can be used to introduce parallelism and asynchrony to I/O scenarios.Here’s a simple scenario.  I want to retrieve data from a number of web resources.static string[] Resources = new string[]{    "http://www.microsoft.com", "http://www.msdn.com",&...

Asynchronous methods, C# iterators, and Tasks

June 30, 2009 Jun 30, 2009 06/30/09
Stephen Toub - MSFT
More and more, developers are realizing the significant scalability advantages that asynchronous programming can provide, especially as it relates to I/O. Consider an application that needs to copy data from one stream to another stream, such as is being done in the following synchronous implementation: static void CopyStreamToStream(Stream ...