[libfabric-users] Linux verbs / Windows netdir Interoperability

dshinaberry at MRU.MEDICAL.CANON dshinaberry at MRU.MEDICAL.CANON
Tue Jan 4 12:06:53 PST 2022

Hello Sean and fellow list users,

I'm starting to think about this effort in very high-level broad brushstrokes and I have some administrative/bookkeeping questions.

-- Venue for Discussion

I am certain that I am going to want to have a lot of back and forth discussions about this task. How you would like to handle that? I imagine it could be:

  1.  just messages on this list; or
  2.  a dedicated issue in the GitHub repository; or
  3.  something else entirely.

My thinking was #2, but I'm happy to do whatever makes sense for the project.

-- Required Testing

I am aware of the existence of fabtests, but those seem like more a set of tools for end users to familiarize themselves with the library and check for correct installation/configuration. I'm curious to know if you have any requirements and/or guidelines for what testing should be done for new code. Unit tests? Regression tests? Integration tests? Etc.

Obviously, code I submit will work for my use case, however that seems like a bare minimum and I feel like I should aspire to more than just that. Just looking for some guidance about expectations for testing.

-- Earliest Notions of an Approach to the Problem

I could imagine this effort being directed in one of several directions and was interested in your opinion on the pros and cons of them and what direction you think I ought to head. We could:

  1.  completely scrap the existing netdir provider and start over with something new;
  2.  keep the existing netdir provider and augment it with some sort of verbs compatibility setting via an environment variable;
  3.  keep the existing netdir provider and create a new one along side it, e.g. ndverbs, that will play well with the verbs provider running on Linux;
  4.  port libibverbs to Windows/NetworkDirect and theoretically use the libfabric verbs provider on both Linux and Windows;
  5.  something I haven't even contemplated.

Kind Regards,

Derek Shinaberry
Senior Software Engineer, Platform Software
Canon Medical Research USA, Inc.
706 N. Deerpath Drive, Vernon Hills, IL 60061, USA

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