OpenCL?

[a mad pigeon]

Today I just found out about OpenCL by looking for new Nvidia drivers. I read up and watched and AMD CPU demo and I looked at an older thread in this forum about it. Then I looked through recent Dolphin builds and I found that there were OpenCL plugins for Dolphin. So I downloaded x64 r4633 and the x64 r4633 Nvidia OpenCL plugins, along with the new Nvidia drivers. When I launch a game it gives me tons of code selection and it tells me it "failed to create compute kernel". Is this really new or something? Also, both Direct3D9 and OpenGL look really messed up, and there is speed loss in D3D9.

[extreme64]

yes it's really new and really beta. It's incomplete and takes alot of work off of your cpu though in the texture conversion

[imk]

Yes, it appears to be broken now.

Here's an output from my log:

Code:

15:14:769 N[BOOT]: Booting D:\Games\Dolphin\Games/New Super Mario Bros. Wii [US] [SMNE01].gcz
15:14:782 N[OSREPORT]: 81200614->81300000|
Apploader Initialized.
15:14:782 N[OSREPORT]: 81200630->81300000| This Apploader built Jun 22 2009 18:54:04 for RVL
15:15:197 N[COMMON]: Initialized OpenCL!
15:15:481 E[*]: Warning: Error log:
Error: Code selection failed to select: 0000000031EDA248: v4i8 = scalar_to_vector 0000000031EDA150


15:16:219 E[*]: Warning: OpenCL error: Failed to create compute kernel! CL_INVALID_PROGRAM (-44)
15:17:299 E[*]: Warning: OpenCL error: Failed to create compute kernel! CL_INVALID_PROGRAM (-44)

I did a Google search for "Code selection failed to select" and the only thing that came up was a thread on the nVidia forum about a compiler bug.

[extreme64]

do you have drivers with opencl enabled?

[imk]

Yes. I actually develop software myself and have worked with OpenCL a bit. All of the OpenCL samples that came with the GPU Computing SDK work fine.

If it's like the post in the nVidia thread, it might be a compiler bug. Otherwise it might be something with Dolphin. Seeing as it's a relatively experimental feature in Dolphin right now, it could just be a bug there.

[a mad pigeon]

Yeah, it seems extremely broken and buggy right now. Games are nearly unplayable with the graphics, glitched up green and black screens and D3D9 suffers from performance loss. Hopefully the team can work on it!

Also, does OpenCL let applications scale to multiple processor cores? Does it do this only for applications programmed in OpenCL or does it do this for other programs? I'm confused (and how does it tie in with the GPU)

[extreme64]

opencl offloads cpu work to the gpu effectively freeing up resources on the cpu so more can be used for emulation

[Xtreme2damax]

Last time I checked OpenCL builds have severely broken graphics, seemed to start happening after the commits rodo posted. When he altered the graphics plugin and fixed some problems it likely created incompatibilities with OpenCL, the OpenCL code in Dolphin will probably have to be updated to fix this.

Just I guess, I know jack squat since I'm not a developer.