nccl-tests: init at 2.13.6

[jmillerpdt]

Description of changes

Adds tests to check both the performance and the correctness of NVIDIA NCCL operations.

Closes Package request: nccl-tests#239212

CC @NixOS/cuda-maintainers @ConnorBaker

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.11 Release Notes (or backporting 23.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

$ nix-build --expr 'with (import ./. { config = { allowUnfree = true; cudaSupport = true; }; }).pkgs; cudaPackages.nccl-tests'
/nix/store/l6n4w81qnwb05fpjgg4dv3lnanb40z3g-nccl-tests-2.13.6

[ConnorBaker]

Thank you for submitting this! And sorry about the delay in reviewing.

Overall, looks good, and the result runs as expected. I included a few things I'd like to see addressed before I merge.

[jmillerpdt]

Thank you for submitting this! And sorry about the delay in reviewing.

Overall, looks good, and the result runs as expected. I included a few things I'd like to see addressed before I merge.

Thank you @ConnorBaker for the review and the suggestions. I believe these have all been addressed.

[ConnorBaker]

Fantastic!