Hi Benjamin, I have written some simple parser for output of certain IB commands: https://gitlab.com/domke/ParseInfiniband Maybe it will help you, since it includes iblinkinfo and is in py3. Best, Jens On 1/5/22 19:32, Benjamin Drung wrote:
Hi, we have an in-house Shell script that uses iblinkinfo to check if the InfiniBand cabling is correct. This information can be derived from the node names that can be seen for the HCA port. I want to improve that check and rewrite it in Python, but I failed to find an easy and robust way to retrieve the node names for a HCA port: 1) Call "iblinkinfo --line" and parse the output. Parsing the output could probably be done with a complex regular expression. This solution is too ugly IMO. 2) Extend iblinkinfo to provide a JSON output. Then let the Python script call "iblinkinfo --json" and simply use json.load for parsing. This solution requires some C coding and probably a good json library should be used to avoid generating bogus JSON. 3) Use https://github.com/jgunthorpe/python-rdma but this library has not been touched for five years and needs porting to Python 3. So that is probably a lot of work as well. 4) Use pyverbs provided by rdma-core, but I found neither a single API call to query similar data to iblinkinfo, nor an example for that use case. What should I do?
