I have successfully tested a small C++ program which uses the NVIDIA cuDNN API to run code on a GPU. The cuDNN API level is 9.1.1. The program compiles, links and runs OK.

What puzzles me is that according to the official NVIDIA API documentation (https://docs.nvidia.com/deeplearning/cudnn/latest/api/overview.html) a large number of the cuDNN functions are marked as deprecated. E.g. one such function is cudnnActivationForward(), which seems to be at the core of what the cuDNN library is for.

Nowhere can I seem to find notes about *why *these functions are going away, or what *replaces *them. It is of course OK that an API is being modernized, but normally then some information on what to use instead, or a migration path is provided by the API developer.

Does anyone have any pointers or insight why these functions are being deprecated, and what else to use instead?