Establish path finder support policy

Capturing some thoughts discussed offline

Library teams can request support for their libraries (shipped outside of CTK), provided that they contribute and help maintain the search logics.

For non-CTK libraries we need each library team’s help if they need pathfinder’s support. We will guide them for onboarding, review their contributions, and make sure we cut a new release to meet their release schedule (we’re very agile in this). We also need the library teams to be responsible for future maintenance.

...

One of the use cases: #776 (libmathdx)

cudss might be another use case: #833

cufftmp is another use case https://docs.nvidia.com/cuda/cufftmp/index.html

@ZzEeKkAa

cufftmp is another use case https://docs.nvidia.com/cuda/cufftmp/index.html

@ZzEeKkAa How is that library usually installed?

(I clicked around for a few minutes, I found examples, but didn't get lucky finding instructions for installing a .so or .dll.)

cufftmp is another use case https://docs.nvidia.com/cuda/cufftmp/index.html

@ZzEeKkAa How is that library usually installed?

(I clicked around for a few minutes, I found examples, but didn't get lucky finding instructions for installing a .so or .dll.)

It is only for linux, if I understand correctly.

You can install it by extracting tarball from https://developer.nvidia.com/cufftmp-downloads and populating LD_LIBRARY_PATH. Other option is to use nvidia-cufftmp-cu12 wheel

You can install it by extracting tarball from https://developer.nvidia.com/cufftmp-downloads and populating LD_LIBRARY_PATH.

I found a .deb there and installed it following the instructions exactly. Then, using PR #834, this works even without populating LD_LIBRARY_PATH:

(Cp13WslVenv) rwgk-win11.localdomain:~/forked/cuda-python $ python
Python 3.12.3 (main, Jun 18 2025, 17:59:45) [GCC 13.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from cuda.pathfinder import load_nvidia_dynamic_lib
>>> load_nvidia_dynamic_lib("cufftMp")
LoadedDL(abs_path='/lib/x86_64-linux-gnu/libcufftMp.so', was_already_loaded_from_elsewhere=False, _handle_uint=694625936)
>>>

It works through the standard system search.

There is a softlink:libcufftMp.so → libcufftMp.so.11

The details of the softlink involve /etc/alternatives, I guess that's to support switching versions.

I don't think there is anything actionable here at the moment. Closing for now.

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Establish path finder support policy #633

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Establish path finder support policy #633

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ZzEeKkAa commented on Jul 23, 2025

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rwgk commented on Aug 14, 2025

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rwgk commented on Aug 14, 2025

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