List available devices

[jakirkham]

Would be really handy if there was a way to list all available devices on a machine. Not sure if this is possible or already exists (and I overlooked the docs 🤦‍♂️).

[abergeron]

You can list the number of platforms with

pygpu.gpuarray.count_platforms(kind)

and the devices with

pygpu.gpuarray.count_devices(kind, platno)

Is this what you had in mind?

[jakirkham]

Not exactly, but that does work. Thanks.

Would note that pygpu.gpuarray.count_platforms("cuda") returned 1 on a platform with no CUDA compatible GPUs. Can open a new issue to investigate further if there is interest.

[abergeron]

The platform is there, but there should be no devices. It's a side effect of dynamically loading the libraries when required.

However, I don't claim that these functions are 100% bug-free, so if you find issues, please report them.

[lepeuvedic]

There is an issue with pygpu.gpuarray.count_platforms("cuda") returning 1 on platform without CUDA compatible GPUs : when the program tries to explore the devices on this inexistant platform, python tries to load libcuda.so dynamically, doesn't find if (of course) and raises an exception. A correct piece of software should not raise exceptions. In this case, calling count_devices('cuda',0) is a legitimate action when count_platforms('cuda') returns greater than zero.

[abergeron]

That is something we could fix.