24 replies to this topic

[mitch_de]

Hi,
if you would try some OpenCL Benchmarks, like OceanWave it would be fine.
I get not the correct OpenCL result with 10.8 DP1 + Nvidia 9600GT in OceanWave.
Also Luxmark works but not correct results.

For an first test you can use OceanWave:
http://www.insanelym...5  

Nvidia 9600 GT =  89 fps


DL: OceanWave ML (10.8 only!)

Attached Files

•  OpenCL_OceanWave_ML.zip   3.54MB   93 downloads

[Blah101]

I have to fix my OpenCL before I test, then I will report back.

[bergoulle]

With Oceanwave  i m getting Failed to initialize OpenCL= mostly by OpenCL driver didnt know your gpu, like Fermi GTX.... which need to be patched TI
I have an AMD ATI 6850.

[Nanael]

bergoulle, on 18 February 2012 - 12:53 PM, said:

With Oceanwave  i m getting Failed to initialize OpenCL= mostly by OpenCL driver didnt know your gpu, like Fermi GTX.... which need to be patched TI
I have an AMD ATI 6850.

I got this too =(

[mitch_de]

Thats not good and and other problem you find out.
To be more easy , please try the small OCLinfo tool ( in terminal), should show at least 2 OpenCL devices : 1 CPU and 1 GPU. If only 1 CPU is shown,
OpenCL on GPU wont work at all. That problem is different to my problem with wrong screen drawings.

Attached Files

•  oclinfo.zip   25.98K   84 downloads

[Nanael]

that's what it give to me

Attached Files

•  Résultat de Terminal.zip   1.37K   5 downloads

[bergoulle]

Here the result

Attached Files

•  OpenCL.pdf   24.63K   38 downloads

[mitch_de]

OK, that (OCLinfo log) shows that OpenCL is available but in usage (OpenCL code) it fails with an error.
Apple will fix that soon / in next DPs i think. AMD made much more problems as Nvidia  in the past with OpenCL,  but Apple always fixed that later.
I also found out that, many changes in th eOpenGL API maybe the reason for the display glitches (running OceanWave on my Nvidia), so its not only an OpenCL problem, main prob was OpenGL which i get fixed by recompling unetr Xcode 4.4 & 10.8 SDK. Will upload soon an 10.8 Version of OcenWace - but that will not help in case of your OpenCL initilize error.

[Nanael]

so it's just that we can't test it but openCL is working, right?

[flip360]

i have two devices shown with the OpenCLinfo tool, 1 CPU one GPU in 10.8 DP1 on my notebook (specs in sig)

[mitch_de]

antaeus, on 19 February 2012 - 07:49 PM, said:

so it's just that we can't test it but openCL is working, right?

No - you can test it but it may fail even its enabled. OpenCL  Enabled doesnt mean the newer 10.8 DP1 OpenCL drivers work correct.
Also it may - in this stage of Dev Preview be very dependend from gpu type + gpu vendor.
For example the new OceanWave ML (10.8) Version works on my 9600 GT, on an GTX 460 (listed OK in OCLinfo) not, fails in OpenCL init section.
DL; first post

[Nanael]

the attached file give me the same things "ERROR: Failed to initialize OpenCL= mostly by OpenCL driver didnt know your gpu, like Fermi GTX.... which need to be patched"

[mitch_de]

Even if the OCLInfo tool - also OpenCL code works, it may happen than more complex OpenCL code may fail - like in OceanWave.
Maybe an bug in OpenCL or OceanWave may need code changes (from Apple) in deep.
because Luxmark also make some problems it think OpenCL App need some code changes.
Have someone else tried LuxMark V2.0 ?
I would recommend, because we know OceanWave make much probs, to try Luxmark V2.
Please compare the display of the scenes preview between gpu only and gpu + cpu. Should look 100% similar, otherwise, if the look very different,  problem (like me).
http://www.luxrender...uxMark#Download

[Nanael]

i got this:

[mitch_de]

Yep, even if you dondt get Init or Build errors , like me, Luxmark will fail running 10.8
cmf investigated:

opencl works ootb on fermi , but apple seems to have removed the sm_20 code and hard setting it to 1.2 or 1.3 won't work either

MEANS:  luxmark and all other programs that want to use more complex opencl stuff (like local memory atomics) will fail.

Thats the reason why less complex Code, like OCLInfo worked without any problem.

[mitch_de]

Great - i got (old) GALAXIES (OpenCL!) bench compiled for 10.7 + 10.8 - works with my Nvidia 9600 GT.
Info + Discuss + DL :
http://www.insanelym...howtopic=276190

[Nanael]

So just have to wait and see! Thx for your answer!

[mitch_de]

antaeus, on 20 February 2012 - 03:17 PM, said:

So just have to wait and see! Thx for your answer!

Did you test already the new galaxies build with your AMD  ?
An GTX 460 got 421 Gigaflops  with 10.8 - so at least some gpus (beside me)  can do galaxies.

[Nanael]

it's working but i got only 62 gigaflops

[mitch_de]

63 GigaFlops ? I get 114 GFlops with 9600 GT, Which GPU?
Perhaps some AGPM problem (gpu wont run at max MHz).