gpu_full_multi_gpu_tests.yml

# Compile and test tfhe-cuda-backend on an AWS instance
name: TFHE Cuda Backend - Full tests multi-GPU

env:
  CARGO_TERM_COLOR: always
  ACTION_RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
  RUSTFLAGS: "-C target-cpu=native"
  RUST_BACKTRACE: "full"
  RUST_MIN_STACK: "8388608"
  SLACK_CHANNEL: ${{ secrets.SLACK_CHANNEL }}
  SLACK_ICON: https://pbs.twimg.com/profile_images/1274014582265298945/OjBKP9kn_400x400.png
  SLACK_USERNAME: ${{ secrets.BOT_USERNAME }}
  SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
  IS_PULL_REQUEST: ${{ github.event_name == 'pull_request' }}

on:
  # Allows you to run this workflow manually from the Actions tab as an alternative.
  workflow_dispatch:
  pull_request:
    types: [ labeled ]

jobs:
  should-run:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
    outputs:
      gpu_test: ${{ env.IS_PULL_REQUEST == 'false' || steps.changed-files.outputs.gpu_any_changed }}
    steps:
      - name: Checkout tfhe-rs
        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
        with:
          fetch-depth: 0

      - name: Check for file changes
        id: changed-files
        uses: tj-actions/changed-files@c65cd883420fd2eb864698a825fc4162dd94482c
        with:
          since_last_remote_commit: true
          files_yaml: |
            gpu:
              - tfhe/Cargo.toml
              - tfhe/build.rs
              - backends/tfhe-cuda-backend/**
              - tfhe/src/core_crypto/gpu/**
              - tfhe/src/integer/gpu/**
              - tfhe/shortint/parameters/**
              - tfhe/src/high_level_api/**
              - tfhe/src/c_api/**
              - 'tfhe/docs/**.md'
              - Makefile
              - '.github/workflows/**_multi_gpu_tests.yml'
              - scripts/**
              - ci/**

  setup-instance:
    name: Setup instance (cuda-tests-multi-gpu)
    needs: should-run
    if: github.event_name != 'pull_request' ||
      (github.event.action != 'labeled' && needs.should-run.outputs.gpu_test == 'true') ||
      (github.event.action == 'labeled' && github.event.label.name == 'approved' && needs.should-run.outputs.gpu_test == 'true')
    runs-on: ubuntu-latest
    outputs:
      runner-name: ${{ steps.start-instance.outputs.label }}
    steps:
      - name: Start instance
        id: start-instance
        uses: zama-ai/slab-github-runner@447a2d0fd2d1a9d647aa0d0723a6e9255372f261
        with:
          mode: start
          github-token: ${{ secrets.SLAB_ACTION_TOKEN }}
          slab-url: ${{ secrets.SLAB_BASE_URL }}
          job-secret: ${{ secrets.JOB_SECRET }}
          backend: hyperstack
          profile: multi-gpu-test

  cuda-tests-linux:
    name: CUDA multi-GPU tests
    needs: [ should-run, setup-instance ]
    if: github.event_name != 'pull_request' ||
      (github.event_name == 'pull_request' && needs.setup-instance.result != 'skipped')
    concurrency:
      group: ${{ github.workflow }}_${{ github.ref }}
      cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
    runs-on: ${{ needs.setup-instance.outputs.runner-name }}
    strategy:
      fail-fast: false
      # explicit include-based build matrix, of known valid options
      matrix:
        include:
          - os: ubuntu-22.04
            cuda: "12.2"
            gcc: 11 
    env:
      CUDA_PATH: /usr/local/cuda-${{ matrix.cuda }}
      CMAKE_VERSION: 3.29.6
    steps:
      # Mandatory on hyperstack since a bootable volume is not re-usable yet.
      - name: Install dependencies
        run: |
          sudo apt update
          sudo apt install -y checkinstall zlib1g-dev libssl-dev 
          wget https://github.com/Kitware/CMake/releases/download/v${{ env.CMAKE_VERSION }}/cmake-${{ env.CMAKE_VERSION }}.tar.gz
          tar -zxvf cmake-${{ env.CMAKE_VERSION }}.tar.gz
          cd cmake-${{ env.CMAKE_VERSION }}
          ./bootstrap
          make -j"$(nproc)"
          sudo make install

      - name: Checkout tfhe-rs
        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
        with:
          persist-credentials: 'false'

      - name: Set up home
        run: |
          echo "HOME=/home/ubuntu" >> "${GITHUB_ENV}"

      - name: Install latest stable
        uses: dtolnay/rust-toolchain@7b1c307e0dcbda6122208f10795a713336a9b35a
        with:
          toolchain: stable

      - name: Export CUDA variables
        if: ${{ !cancelled() }}
        run: |
          echo "CUDA_PATH=$CUDA_PATH" >> "${GITHUB_ENV}"
          echo "$CUDA_PATH/bin" >> "${GITHUB_PATH}"
          echo "LD_LIBRARY_PATH=$CUDA_PATH/lib:$LD_LIBRARY_PATH" >> "${GITHUB_ENV}"
          echo "CUDACXX=/usr/local/cuda-${{ matrix.cuda }}/bin/nvcc" >> "${GITHUB_ENV}"

      # Specify the correct host compilers
      - name: Export gcc and g++ variables
        if: ${{ !cancelled() }}
        run: |
          {
            echo "CC=/usr/bin/gcc-${{ matrix.gcc }}";
            echo "CXX=/usr/bin/g++-${{ matrix.gcc }}";
            echo "CUDAHOSTCXX=/usr/bin/g++-${{ matrix.gcc }}";
            echo "HOME=/home/ubuntu";
          } >> "${GITHUB_ENV}"

      - name: Check device is detected
        if: ${{ !cancelled() }}
        run: nvidia-smi

      # No need to test core_crypto and classic PBS in integer since it's already tested on single GPU.
      - name: Run multi-bit CUDA integer tests
        run: |
          BIG_TESTS_INSTANCE=TRUE make test_integer_multi_bit_gpu_ci

      - name: Run user docs tests
        run: |
          BIG_TESTS_INSTANCE=TRUE make test_user_doc_gpu

      - name: Test C API
        run: |
          BIG_TESTS_INSTANCE=TRUE make test_c_api_gpu

      - name: Run High Level API Tests
        run: |
          BIG_TESTS_INSTANCE=TRUE make test_high_level_api_gpu

  slack-notify:
    name: Slack Notification
    needs: [ setup-instance, cuda-tests-linux ]
    runs-on: ubuntu-latest
    if: ${{ always() && needs.cuda-tests-linux.result != 'skipped' }}
    continue-on-error: true
    steps:
      - name: Send message
        uses: rtCamp/action-slack-notify@4e5fb42d249be6a45a298f3c9543b111b02f7907
        env:
          SLACK_COLOR: ${{ needs.cuda-tests-linux.result }}
          SLACK_MESSAGE: "Multi-GPU tests finished with status: ${{ needs.cuda-tests-linux.result }}. (${{ env.ACTION_RUN_URL }})"

  teardown-instance:
    name: Teardown instance (cuda-tests-multi-gpu)
    if: ${{ always() && needs.setup-instance.result != 'skipped' }}
    needs: [ setup-instance, cuda-tests-linux ]
    runs-on: ubuntu-latest
    steps:
      - name: Stop instance
        id: stop-instance
        uses: zama-ai/slab-github-runner@447a2d0fd2d1a9d647aa0d0723a6e9255372f261
        with:
          mode: stop
          github-token: ${{ secrets.SLAB_ACTION_TOKEN }}
          slab-url: ${{ secrets.SLAB_BASE_URL }}
          job-secret: ${{ secrets.JOB_SECRET }}
          label: ${{ needs.setup-instance.outputs.runner-name }}

      - name: Slack Notification
        if: ${{ failure() }}
        continue-on-error: true
        uses: rtCamp/action-slack-notify@4e5fb42d249be6a45a298f3c9543b111b02f7907
        env:
          SLACK_COLOR: ${{ job.status }}
          SLACK_MESSAGE: "Instance teardown (cuda-tests-multi-gpu) finished with status: ${{ job.status }}. (${{ env.ACTION_RUN_URL }})"