Parallel Programming with .NET

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Parallel Extensions June CTP is out

This is great news--I've been using the Parallel Extensions to parallelize a game engine, and I'm eager to try out the new release!

Nice! I'm also interested in trying this out, but the download link doesn't work (same as what BKStrelioff said above).

4:07pm, here in Scotland and the link does not work!!, at least not yet...

PingBack from http://www.damonpayne.com/2008/06/02/June2008ParallelExtensionsCTP.aspx

Now, the link is working!! Great job!

Begining to test...

Regards

Today, Parallel Programming team released 2nd CTP for Parallel Extensions to .NET Framework 3.5. Major

Today, Parallel Programming team released 2nd CTP for Parallel Extensions to .NET Framework 3.5. Major

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PingBack from http://www.itedge.net/blog/2008/06/02/microsoft-parallel-extensions-to-net-framework-june-ctp/

Download the Parallel Extensions June 2008 CTP Parallel Extensions simplifies development by providing

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PingBack from http://blogs.msdn.com/mvplead/archive/2008/06/02/download-the-parallel-extensions-june-2008-ctp.aspx

nifty :)

btw do you know what happend to the accelerator team? they guys that used the gpu to do general purpose computing?

it would be awsome to see someting like that in plinq :)

At Microsoft we are always looking to get feedback about our products and technologies from communities

Hi All, Parallel Extensions simplifies development by providing library-based support for introducing

Parallel Programming with .NET : Released! Parallel Extensions to the .NET Framework June 2008 CTP .NET

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Вышел второй CTP для Parallel Extensions - библиотеки позволяющей облегчить напи

Free performance lunch is over. During the past few decades we witnessed continuous growth of single

PingBack from http://vladvino.wordpress.com/2008/06/03/parallel-extensions-to-net-june-2008-ctp/

On top of Bill Gates announcements at the Microsoft Tech·Ed North America 2008 Developers conference,

My latest in a series of the weekly, or more often, summary of interesting links I come across related to Visual Studio. The June 2008 CTP of the Parallel Extensions to the .NET Framework has been released. VSX Team announced the VSX Developer Conference

Le Parallel Extensions per .NET sono sicuramente uno degli argomenti più caldi del periodo. Se ne

Under hela vårens lanseringsroadshow så har jag och Robert visat hur Parallel Extensions som

The June 2008 Community Technology Preview (CTP) of Parallel Extensions to the .NET Framework was released

I watched the TechEd (US Developers) Keynote just yesterday. Tech·Ed NA Developers Keynote delivered...

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l'equipe PFX, vient d'annoncer la disponibilité de la deuxième CTP du framework parallèle pour .NET blogs

PingBack from http://tempuzfugit.wordpress.com/2008/06/12/publicada-la-parallelfx-ctp-junio-2008/

at 06/02, Microsoft just released the latest CTP of Parallel Extension to .NET 3.5 (as PFX later), available

crosspost from http://blogs.msdn.com/rextang at 06/02, Microsoft just released the latest CTP of Parallel

When I run the following test in NUnit, I get this exception when NUnit has finished running all tests:

Unhandled Exception:Unhandled Exception:  System.AppDomainUnloadedException: The

application domain in which the thread was running has been unloaded.System.App

DomainUnloadedException: The application domain in which the thread was running

has been unloaded.

The program works as expected when run as a console application. Is there a workaround?

using System;

using System.Threading;

using NUnit.Framework;

namespace Tests

{

   [TestFixture]

   public class ParallelExtensionsTest

   {

       [Test]

       public void FirstTest()

       {

           Parallel.Invoke(

               () => A(),

               () => B());

       }

       private static void A()

       {

           Console.WriteLine("A");

       }

       private static void B()

       {

           Console.WriteLine("B");

       }

   }

}

It looks like the exception Casper indicated above happens whenever parallel extensions were used from app domain which later got unloaded. Here's a simple example to replicate this:

using System;

using System.Reflection;

using System.Threading;

public class Program : MarshalByRefObject

{

   private static void Main()

   {

       AppDomain appDomain = AppDomain.CreateDomain("Moo");

       var p = (Program) appDomain.CreateInstanceAndUnwrap(

                             Assembly.GetExecutingAssembly().FullName,

                             "Program");

       p.ParallelTest();

       AppDomain.Unload(appDomain);

   }

   public void ParallelTest()

   {

       Parallel.Invoke(() => Console.WriteLine("Leet!"));

   }

}

Any ideas how to avoid this?

I found another problem. After the parallel operations are performed, the Parallel Extensions library does hog the CPUs. Even for my simple test program below, it uses up to about 1/3 of my 4 Xeon cores long after the operations are performed. It doesn't seem to ever stop. The CPU load is about evenly distributed accross all cores. Both Parallel.For and Parallel.ForEach has this problem. My OS is Windows Server 2003. Is there a fix or workaround available?

using System;

using System.Threading;

namespace ParallelExtensionsConsole

{

   public class Program

   {

       static void Main(string[] args)

       {

           Console.WriteLine("Call Parallel.For (y/n)?");

           var key = Console.ReadKey();

           Console.WriteLine();

           if (key.KeyChar == 'y')

           {

               Parallel.For(0, 10, i =>

                                       {

                                           Console.WriteLine(i);

                                       });

           }

           Console.WriteLine("Press any key to continue...");

           Console.ReadLine();

       }

   }

}

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PingBack from http://khason.net/blog/just-released-parallel-extensions-%e2%80%93-june-ctp/

Re: The app domain "workaround" - this doesn't work. I used Reflector to take a look at the assembly, and the default TaskManager is not lazily initialized, so you can't create a TaskManager instance without also creating the default one.

However, for NUnit you can work around this by copying the NUnit console exe and the various assemblies it needs into the same directory as the assembly containing the tests you wish to run, then specify  /domain:None when you run it.

I'm having trouble testing PLINQ code or using PLINQ to make parametric tests run faster. NUnit consistently throws AppDomainUnloadedException after the tests. I've tried many workarounds suggested in this thread and elsewhere, to no avail.

What's happened in the last 14 months to make AppDomainUnloadedException easier to avoid, diagnose, and — ideally — prevent?

Yours,

Garth.

"Download the Parallel Extensions June 08 CTP" link is broken.