Run GPU tests on python 3.8 & 3.10

[charlesbluca]

In rapidsai/dask-build-environment#58, @jakirkham suggested that it might be worth running GPU testing against python 3.8 (currently the lowest Python version supported by RAPIDS):

To ensure RAPIDS + Dask work on Python 3.8, it may be worth testing on that version. Presumably Python 3.10 will still work in that case. However if Python 3.10 is tested and a Python 3.9 or 3.10 feature is used in RAPIDS-specific code path in Dask, it may work when tested against Python 3.10, but not work in Python 3.8 environment should users try that.

Interested in if any failures will crop up here, and also to solicit opinions from other RAPIDS maintainers (cc @pentschev @quasiben)

• Closes #xxxx
• Tests added / passed
• Passes pre-commit run --all-files

[pentschev]

This makes sense to me, best to test with the oldest support. Thanks @charlesbluca and @jakirkham !

[jakirkham]

Thanks Charles! 🙏

Is there anything else needed before marking this ready for review?

[charlesbluca]

Chatted with @ajschmidt8 and seems like it's pretty trivial to run testing for both python 3.8 and 3.10 on each PR (a run for example):

https://gpuci.gpuopenanalytics.com/job/dask/job/dask/job/prb/job/dask-prb/3428/

Given this, how do we feel about running the GPU tests on both 3.8 and 3.10? Don't think should have much of an impact on the overall runtime of CI

[jrbourbeau]

Thanks @charlesbluca!

both python 3.8 and 3.10 on each PR

I'm curious why Python 3.10 instead of Python 3.11?

[charlesbluca]

I'm curious why Python 3.10 instead of Python 3.11?

RAPIDS deprecated python 3.9 support in 22.12, and moving forward plans to maintain support for 3.8 and 3.10.

[jrbourbeau]

RAPIDS deprecated python 3.9 support in 22.12, and moving forward plans to maintain support for 3.8 and 3.10.

Ah, I see. I hadn't realized that, thanks for clarifying.

I'll defer to folks like yourself, John, and Peter about what's best here. It looks like testing on 3.8 and 3.10 doesn't have a big impact on overall CI runtime, so I think we're good on that front 👍

[jakirkham]

I'm curious why Python 3.10 instead of Python 3.11?

RAPIDS deprecated python 3.9 support in 22.12, and moving forward plans to maintain support for 3.8 and 3.10.

Just to add to Charles' response, RAPIDS only recently added Python 3.10 support and has not yet added Python 3.11 support.

[jakirkham]

Given this, how do we feel about running the GPU tests on both 3.8 and 3.10? Don't think should have much of an impact on the overall runtime of CI

+1

As long as we include Python 3.8, happy with any other CI jobs.

[jakirkham]

cc @rjzamora (for awareness)

[jrbourbeau]

Thanks @charlesbluca