C# OpenCL bindings ready for testing

Thanks for testing.

I have encountered similar issues here and it's good to know they are not limited to my system. Haven't been able to find the cause yet.

It's a fact that P/Invokes work slightly different than the C linker, so it's possible that one works where the other one fails in some specific cases. We might be hitting such a corner case here.

I've yet to test on Linux.

Already done in SVN. The actual bindings are under 4 files in the CL10 directory. Everything else is empty and has remained as a guide for the high level classes.

Yes, please create a new thread for this. It's also a good idea to create separate threads for any issues you encounter (e.g. GetPlatformIDs), otherwise they tend to get lost in the woods.

Thanks for testing.

Can you please create an issue report with the exception and some details on your operating system? (OS, version and whether it's 32- or 64-bits)

Edit: Ati Stream 2.0 beta 3 still suffers from issue #1124: [OpenCL] EntryPointNotFoundException on CL calls. This is a bug in Ati's code on Windows - the Linux version is working correcty, as is Nvidia's implementation.

fyi: AMD released Stream SDK v2.0 beta 4 today.

Thanks, I believe this error has been fixed in SVN and 0.9.9-3, but I cannot test right now.

Nythrix is working on an OOP wrapper and there's OpenCL.Net, but I don't know the current status of either project. Right now, we are focusing on core OpenTK and the GL & ES bindings and we'll work OpenTK.Compute.

Of course help is welcome:

• Bug reports for errors like the one you encountered
• Suggestions on how to make the OpenCL bindings simpler to use (they are hard right now!)
• Examples and test code (the VectorAdd sample is not enough!)
• Checking that the bindings match the specs

Every little bit helps!

Well, I've tested it and it does not throw any exceptions for me. But the result I get is

0+0=0
0+0=0
0+0=0
0+0=0
0+0=0
0+0=0
...

To be honest I haven't checked what this example should do. I was only interested if the bindings work.

Hi,

the following line from the "vectorAdd" example returns an error 'OpenTK.Compute.CL10.ErrorCode.InvalidKernelName':

// create kernel
            cl_kernel hKernel = CL.CreateKernel(hProgram, "vectorAdd", out error);

resulting in hKernel staying 0 so nothing gets ever called. That is why the result is still all 0.

I am using the ATi Beta 4 together with a HD 5770 using VS 2008.

Regards,
Bernd Krekeler.

Hi,

I have a computer with :
- an Intel CPU
- an Intel Graphic Card

So, my question is... if I write an application based on OpenCL... will it work to on machines that doesn't support OpenCL ?
or I must write another version of my soft ?

Thanks

You can use Ati's Stream SDK (free registration required). It requires SSE3 (any Core 2 or newer will do), but otherwise runs on Intel CPUs just fine.

Hi,

I have download the AMD Stream SDK at : http://developer.amd.com/gpu/ATIStreamSDKBetaProgram/Pages/default.aspx#...

I have download this one : "ati-opencl-beta-driver-v2.0-beta4-xp.zip (109MB)"

But I can't find any OpenCL dll !!!! Even during installation I can't find any option regarding OpenCL :-(

After adding <dllmap os="osx" dll="opencl.dll" target="/System/Library/Frameworks/OpenCL.framework/OpenCL"/> to OpenTK.dll.config the VectorAdd Sample seems to work correctly on my Snow Leopard system. It outputs correct sums of random integers.

Hello,

My system is an AMD Phenom2 X4 940 with 3 * 4870 1GB (they are in crossfireX) on Vista x64, i am running the recently released 9.12 hotfix drivers and i have installed the ati-stream-sdk-v2.0-beta4-vista-win7-64.exe (59.3MB).
I am using VSExpress C# 2008 with the OpenTK-0.9.9-3 and running the VectorAdd from trunk I am seeing the following error (i added additional Error checks after each setting of error):

Launching sample: "Vector Addition"
 
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Exception: InvalidKernelName
   at Examples.VectorAdd.Main() in C:\Users\Cody\Documents\Downloads\opentk-0.9.9-3\opentk-0.9.9-3\Source\Examples\OpenCL\VectorAdd.cs:line 77
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
   at Examples.ExampleBrowser.RunSample(Control parent, ExampleInfo e) in C:\Users\Cody\Documents\Downloads\opentk-0.9.9-3\opentk-0.9.9-3\Source\Examples\ExampleBrowser.cs:line 335

Pointing at this :

            CL.BuildProgram(hProgram, 0, (IntPtr[])null, null, IntPtr.Zero, IntPtr.Zero);
 
            // create kernel
            cl_kernel hKernel = CL.CreateKernel(hProgram, "vectorAdd", out error);
            if (error != ErrorCode.Success)
                throw new Exception(error.ToString());
 
            // allocate host  vectors

I see your comment on the Invalid Kernel Name exception above but that was back in late October and i was hoping this was addressed by these latest drivers. Is there anything i should check on my end to see if something is not setup properly?

A friend of mine suggested I put a line here, given the amount of people (inluding him) ending up reading this thread and never finding the oo wrapper mentioned above. So here goes:

Cloo, the .NET, object oriented OpenCL API wrapper, is finally available and can be downloaded from its sourceforge pages.

What is the OP?

Edit: Original Post, got it.