Dali: Run DALI without CUDA

[macsmy]

Hello!
I would like to ask, if there is any possibility to run DALI without CUDA? As i read in release 2.6 description, there should be one. Unfortunately, I am still getting following error: 'CUDA runtime api error "no CUDA-capable device is detected"'.

[JanuszL]

Hi,
Please use None as a device_id value according to the documentation. You can also check cpu only test.

[macsmy]

thank You! indeed, no-cuda mode is enabled and pipeline is properly build. however, during run() i am still getting cuda-oriented error:
'RuntimeError: Critical error in pipeline:
Error when executing CPU operator ArithmeticGenericOp, instance name: "__ArithmeticGenericOp_15", encountered:
CUDA runtime API error cudaErrorNoDevice (38):
no CUDA-capable device is detected
Current pipeline object is no longer valid.'

[JanuszL]

Could you provide a minimal and self contained reproduction code so we can run it on our side?

[mchalecki]

Did you install with pip command or install from source ?

By the way. How can one build from source without cuda ? I dont see an option in cmake to build without nvcc. Or are there prebuild packages cpu only ?

[JanuszL]

By the way. How can one build from source without cuda ? I dont see an option in cmake to build without nvcc. Or are there prebuild packages cpu only ?

It is not possible to build without CUDA as DALI is coupled with it in the very roots, and I don't think it will be ever possible.

[JanuszL]

I have managed to reproduce the issue, https://github.com/NVIDIA/DALI/pull/2400 should fix that.

[JanuszL]

DALI 0.28 has been released, it should address this issue.