mpich ch4/ofi: Add CVAR to set a preferred NIC per rank

Pull Request Description

The PR is based on top of https://github.com/pmodels/mpich/pull/6732.

Adds a MPIR_CVAR_CH4_OFI_PREF_NIC to let the user select a NIC per rank. Also extends MPIR_CVAR_DEBUG_SUMMARY to print the NIC assigned to a rank.

Author Checklist

[ ] Provide Description Particularly focus on why, not what. Reference background, issues, test failures, xfail entries, etc.
[ ] Commits Follow Good Practice Commits are self-contained and do not do two things at once. Commit message is of the form: module: short description Commit message explains what's in the commit.
[ ] Passes All Tests Whitespace checker. Warnings test. Additional tests via comments.
[ ] Contribution Agreement For non-Argonne authors, check contribution agreement. If necessary, request an explicit comment from your companies PR approval manager.

Oct 31 '23 03:10 tarudoodi

test:mpich/ch4/ofi

Oct 31 '23 03:10 tarudoodi

test:mpich/ch4/ofi

Dec 15 '23 22:12 tarudoodi

test:mpich/ch4/ofi

Mar 20 '24 19:03 tarudoodi

The ch3-tcp warnings test failed due to a cloning error: ERROR: Error cloning remote repo 'origin'

Mar 25 '24 23:03 tarudoodi

@hzhou This is ready for review.

Mar 25 '24 23:03 tarudoodi

Hi @hzhou, I somehow missed the review messages. I agree with your comments. I'll push an update.

Apr 03 '24 19:04 tarudoodi

Please add commit messages for each commit.

Added.

Apr 03 '24 21:04 tarudoodi

test:mpich/ch4/ofi

Apr 03 '24 21:04 tarudoodi

test:mpich/ch4/ofi

Apr 04 '24 15:04 tarudoodi

@hzhou The tests passed and rebased the branch.

Apr 04 '24 19:04 tarudoodi

Please do not merge main into branch. Rather, rebase on top of main.

Apr 04 '24 20:04 hzhou

Please do not merge main into branch. Rather, rebase on top of main.

Didn't expect the update button to do that. Rebased on main. Is it ok to merge after basic warning checks pass?

Apr 04 '24 20:04 tarudoodi

Yes, you can merge it

Apr 04 '24 21:04 hzhou