bench.yml

name: Bench
on:
  push:
    branches: ["main"]
    paths-ignore: ["*.md", "*.png", "*.svg", "LICENSE-*"]
  pull_request:
    branches: ["main"]
    paths-ignore: ["*.md", "*.png", "*.svg", "LICENSE-*"]
# on:
#   workflow_run:
#     workflows: [CI]
#     types: [completed]
env:
  CARGO_PROFILE_BENCH_BUILD_OVERRIDE_DEBUG: true
  CARGO_TERM_COLOR: always
  RUST_BACKTRACE: 1
  TOOLCHAIN: nightly

jobs:
  bench:
    name: Benchmark
    runs-on: self-hosted
    # if: ${{ github.event.workflow_run.conclusion == 'success' }}
    defaults:
      run:
        shell: bash

    steps:
      - name: Install Rust
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: $TOOLCHAIN
          components: rustfmt

      - name: Use sccache
        uses: mozilla-actions/sccache-action@v0.0.4
      - run: |
          echo "SCCACHE_GHA_ENABLED=true" >> "$GITHUB_ENV"
          echo "RUSTC_WRAPPER=sccache" >> "$GITHUB_ENV"

      - name: Install dependencies
        env:
          DEBIAN_FRONTEND: noninteractive
        run: |
          sudo apt-get install -y --no-install-recommends \
            git gyp mercurial ninja-build lld python-is-python3 zlib1g-dev libclang-dev \
            linux-tools-common linux-tools-generic linux-tools-$(uname -r)
          echo "RUSTFLAGS=-C link-arg=-fuse-ld=lld" >> "$GITHUB_ENV"
          echo "$HOME/.cargo/bin"
          echo "$HOME/.cargo/bin" >> $GITHUB_PATH

      - name: Checkout and build
        uses: actions/checkout@v4
      - run: cargo +$TOOLCHAIN bench --features ci,bench --no-run

      # Disable turboboost, hyperthreading and use performance governor
      - name: Prepare machine
        run: |
          echo 1 > sudo tee /sys/devices/system/cpu/intel_pstate/no_turbo
          echo off > sudo tee /sys/devices/system/cpu/smt/control
          sudo cpupower frequency-set -g performance

      # Pin the benchmark to core 0 and run it at elevated priority.
      - name: Benchmark
        run: |
          sudo nice -n -20 sudo -u "$USER" taskset -c 0 \
            cargo +$TOOLCHAIN bench --features ci,bench | tee output.txt

      # Enable turboboost, hyperthreading and use powersave governor
      - name: Restore machine
        run: |
          echo 0 > sudo tee /sys/devices/system/cpu/intel_pstate/no_turbo
          echo on > sudo tee /sys/devices/system/cpu/smt/control
          sudo cpupower frequency-set -g powersave
        if: success() || failure()

      - name: Download previous benchmark results
        uses: actions/cache@v4
        with:
          path: ./cache
          key: ${{ runner.os }}-benchmark

      # - name: Store current benchmark results
      #   uses: benchmark-action/github-action-benchmark@v1
      #   with:
      #     tool: 'cargo'
      #     output-file-path: output.txt
      #     external-data-json-path: ./cache/benchmark-data.json
      #     fail-on-alert: true
      #     github-token: ${{ secrets.GITHUB_TOKEN }}
      #     comment-on-alert: true
      #     summary-always: true