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Error using gpucoder.profile (line 41)

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Emiliano Rosso
Emiliano Rosso on 2 Nov 2022
Commented: Emiliano Rosso on 8 Nov 2022
I have a problem running:
cfg = coder.gpuConfig('exe');
cfg.GpuConfig.MallocMode = 'discrete';
gpucoder.profile('tvd_sim2_MEX',ARGS{1},'CodegenConfig',cfg,...
'CodegenArguments','-d profilingdir','Threshold',0.001);
I get error:
Error using gpucoder.profile (line 41)
Incorrect class for expression 'x': expected 'double' but found 'coder.PrimitiveType'.
What to do?
I have NVIDIA GPU Computing Toolkit\CUDA\v10.2
Microsoft Visual C++ 2019 (C)
Matlab R2020b
CUDA 5.2 compute capability
Thanks!
  6 Comments
Justin Hontz
Justin Hontz on 7 Nov 2022
The code generated for profiling is roughly the same as the code generated from usual SIL codegen, though with some additional profiling API calls inserted in some places to enable the profiling to work as expected.
The error was occurring because the profiler was trying to pass the codegen input specification value (e.g. produced by coder.typeof) to the SIL executable, which is not valid as a runtime input.
The 'Gpu' option of coder.typeof simply controls whether the input of the generated entry-point function will be passed on GPU or not. This can improve performance by eliminating cudaMemcpy calls each time the entry-point function is executed in the case the input comes from GPU (e.g. a GPU array input for MEX).

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