[Bf-committers] Blender support for shader mdoel 6.0

[Sergey Sharybin]

There is no immediate plans for that, because it will require CUDA Toolkit
higher than 6.5 and we are not ready with such a bump yet mainly because
any newer CUDA Toolkit causes measurable speed regressions. For until we
solve or accept those regressions we can't go officially higher than sm_52.

I also don't see any cards which supports sm_60 [1] which means we can't
really choose any reasonable parameters for stack size and number of
threads.

I also didn't find information if any of publicly available CUDA Toolkits
supports sm_60.

So what kind of secret hardware, drivers and toolkit you're using?

[1] https://developer.nvidia.com/cuda-gpus

On Mon, Feb 8, 2016 at 12:00 PM, Martijn Berger <martijn.berger at gmail.com>
wrote:

> HI Nadir,
>
> I would expect some version of cuda 7.5 or 8.0 to offer sm_60 support (
> which i presume is pascal ? ).  There are some plans for falling back onto
> PTX when precompiled kernels do not match the requested feature-set of the
> available hardware.  But due to the size and complexity of our kernel that
> needs a bit of extra work as ptxas will likely chew on those files for a
> non trivial time rendering blender unresponsive, which we need to handle
> before adding ptx fallback kernel support.
>
> If you have the possibility of enabling us to test with a version of the
> cuda toolkit that can generate the needed binaries feel free to contact
> Thomas. Sergey or myself directly.
>
> Martijn
>
> On Mon, Feb 8, 2016 at 7:56 AM, Nadir Cazi <ncazi at nvidia.com> wrote:
>
> > Hi,
> >
> >    We are facing an error in our internal testing while rendering using
> > Blender, with our latest chip running Shader Model 6.0.
> > >> "cuda binary kernal for this graphics card  compute capability 6.0 not
> > found"
> >
> >    We see app creates context, checks for sm version, and then destroys
> > the context and quits.
> >
> >     Does Blender NOT support shader model 6.0? If so, are there any
> > immediate plans to support it?
> >
> >
> > Thanks and regards,
> > Nadir Cazi,
> > SW-GPU,
> > Nvidia Graphics
> >
> >
> >
> > P.S.: Exact steps to reproduce error:
> > 1. Launch Blender app, double click to open.
> > 2. Click on file > Open > select any project by traversing to the path it
> > is saved.
> > 3. Go to File > User Preference > System, select CUDA under "Compute
> > Device".
> > 4. Close User Preference.
> > 5. Click on the Render option (small camera icon) toward the right view.
> > 6. There should be a "Device" drop-down option, which is defaulted to
> > "CPU", change that to "GPU Compute".
> > 7. Render the active scene by clicking the render option, which is the
> > button with the small camera with the word "Render" next to it. It's the
> > first button from the "Render" pane.
> >
> > Observations:
> > 1. Failed with error "cuda binary kernal for this graphics card compute
> > capability 6.0 not found" error after clicking on render button
> >
> >
> >
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-- 
With best regards, Sergey Sharybin