Autotuning tutorial for mali gpu error

1

I am using the latest TVM version 0.5
I’m trying to follow the autotuning tutorial for mobile gpus using Mali GPU on my firefly rk3399 board, but every time I set target=‘opencl -device=mali’,
“TVMError: Not all Vars are passed in api_args: ‘threadIdx.x’ does not appear in api_args” shows up

However when I follows the autituning tutorial for arm it runs fine on my board

I built tvm using opencl and llvm enabeled
If it matters my host machine have linux 16 and gtx 1080 gpu

Thanks in advance

2

I’ve been hitting this issue too. It looks to be a problem with using tophub during task discovery, so I’ve currently worked around it by disabling tophub during this step. This suggests there’s probably a bad fallback config somewhere on tophub for Mali.

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3

Thank you very much for the quick replay.
Could you please give me more info about tophub, what is it’s role and how could i disable it?
Will it effect the performance of tuning after disabiling it?

4

As I understand it, TopHub is collection of pretuned configurations for various devices which you can fall back on if you don’t perform autotuning yourself. Disabling it is a bit of a hack in this case, so I’ve raised an issue here to see if there’s a more permanent fix: tvm/issues/3980

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5

Thanks for illustration.But how could I disable it?
As I want to disable it and give it a try.