[Nouveau] How to enable OpenCL device in Clover ?

[Timothy Maden]

On 10/23/23 20:54, Andrew Randrianasulu wrote:
> I think you can use
> NOUVEAU_ENABLE_CL=1 clpeak for example
> 
> it skips memory-hungry bandwidth test but then runs partially:
> 
> Platform: Clover
>    Device: NV106
>      Driver version  : 23.3.0-devel (Linux x86)
>      Compute units   : 1
>      Clock frequency : 512 MHz
> SPIR-V WARNING:
>      In file ../src/compiler/spirv/spirv_to_nir.c:4681
>      Unsupported SPIR-V capability: SpvCapabilityLinkage (5)
>      28 bytes into the SPIR-V binary
> 
>      Global memory bandwidth (GBPS)
>        float   : nve4_launch_grid:905 - Failed to launch grid !
> 
> [..]
> 
> Single-precision compute (GFLOPS)
>        float   : 80.74
>        float2  : 41.38
>        float4  : 50.49
>        float8  : 51.32
>        float16 : 53.58
> 
> on unreclocked NVIDIA GK208B (2gb ddr3 memory - ha!)

Oh, thank you !

Maybe this variable should be documented, like for example the new 
variable I_WANT_A_BROKEN_VULKAN_DRIVER is documented.

I have a GK208B chip, that I replaced with a GA102.

When I try to use the OpenCL device I get the following error on GA102:

     Build Log: <built-in>:1:10: fatal error: 'opencl-c.h' file not found

this happens with both Mesa 23.2.1 and latest Mesa 24.0.0-devel from git.

The missing header in the message is found in clang-libs package on 
Fedora for example, and if I add the needed -I flag to clBuildProgram(), 
the error goes away. So it looks like a missing include directory inside 
Clover ... ?

Unfortunately I can not add the missing -I flag to OpenCL compiler when 
using clpeak or LuxMark ... without recompiling. Is there an environment 
variable or some other way ?

--
Thank you,
Timothy Madden