# Copyright 2022 The IREE Authors
#
# Licensed under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

# Workflow for running execution benchmarks.
# It is designed to be called from a parent workflow.
# The concurrency of this workflow is controlled by the caller's job.

name: Benchmark execution

on:
  workflow_call:
    inputs:
      runner-group:
        required: true
        type: string
      runner-env:
        required: true
        type: string
      e2e-test-artifacts-dir:
        required: true
        type: string
      e2e-test-artifacts-gcs-artifact-dir:
        required: true
        type: string
      benchmark-tools-gcs-artifact-dir:
        required: true
        type: string
    outputs:
      benchmark-results-dir:
        description: |
          Local path that stores all benchmark results.
          Empty if no benchmark runs.
        value: ${{ jobs.run_benchmarks.outputs.benchmark-results-dir }}
      benchmark-results-gcs-artifact-dir:
        description: |
          GCS path that stores all benchmark results.
          Empty if no benchmark runs.
        value: ${{ jobs.run_benchmarks.outputs.benchmark-results-gcs-artifact-dir }}

permissions:
  contents: read

env:
  # This duplicates the variable from benchmark.yml. The variable needs to be in env
  # instead of the outputs of setup because it contains the run attempt and we
  # want that to be the current attempt, not whatever attempt the setup step
  # last ran in. It therefore can't be passed in via inputs because the env
  # context isn't available there.
  GCS_DIR: gs://iree-github-actions-${{ github.event_name == 'pull_request' && 'presubmit' || 'postsubmit' }}-artifacts/${{ github.run_id }}/${{ github.run_attempt }}
  BENCHMARK_CONFIG: ${{ inputs.e2e-test-artifacts-dir }}/execution-benchmark-config.json
  BENCHMARK_CONFIG_GCS_ARTIFACT: ${{ inputs.e2e-test-artifacts-gcs-artifact-dir }}/execution-benchmark-config.json

jobs:
  generate_matrix:
    runs-on:
      - self-hosted  # must come first
      - runner-group=${{ inputs.runner-group }}
      - environment=${{ inputs.runner-env }}
      - cpu
      - os-family=Linux
    outputs:
      benchmark-matrix: ${{ steps.generate.outputs.benchmark-matrix }}
    steps:
      - name: "Checking out repository"
        uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3 # v3.5.0
      - name: "Checking out runtime submodules"
        run: ./build_tools/scripts/git/update_runtime_submodules.sh
      - name: "Generating benchmark matrix"
        id: generate
        run: |
          gcloud storage cp "${BENCHMARK_CONFIG_GCS_ARTIFACT}" "${BENCHMARK_CONFIG}"
          # This jq command takes a benchmark config with the following structure:
          #
          #   { "target_device_name" : {
          #      "host_environment" : { ... },
          #      "shards" : [ { ... }, { ... } ]
          #     },
          #     "other_target_device_name" : { ... }
          #
          # and turns it into a flat list of benchmark jobs:
          #
          #   [
          #     { "device_name" : "target_device_name",
          #       "host_environment" : { ... },
          #       "shard" : { index: 0, count: 2 }
          #     },
          #     { "device_name" : "target_device_name",
          #       "host_environment" : { ... },
          #       "shard" : { index: 1, count: 2 }
          #     },
          #     { "device_name" : "other_target_device_name",
          #       "host_environment" : { ... },
          #       "shard" : { index: 0, count: N }
          #     },
          #     ...
          #   ]
          echo benchmark-matrix="$(jq -c '[ . | to_entries[]
            | .key as $device_name
            | .value.host_environment as $host_environment
            | (.value.shards | length) as $count
            | .value.shards[]
            | {$device_name, $host_environment, shard: {index, $count}}
            ]' "${BENCHMARK_CONFIG}")" >> "${GITHUB_OUTPUT}"

  run_benchmarks:
    needs: [generate_matrix]
    if: needs.generate_matrix.outputs.benchmark-matrix != '[]'
    strategy:
      # Don't kill other benchmark jobs if one of them failed.
      fail-fast: false
      # Matrix is dynamically generated by the job generate_matrix. So we only
      # runs the benchmarks specified in ${BENCHMARK_CONFIG}.
      # All tasks in matrix are seen as a single job in Github CI and the job
      # can output a single set of values.
      matrix:
        benchmark: ${{ fromJSON(needs.generate_matrix.outputs.benchmark-matrix) }}
    runs-on:
      - self-hosted  # must come first
      - runner-group=${{ inputs.runner-group }}
      - environment=${{ inputs.runner-env }}
      - machine-type=${{ matrix.benchmark.device_name }}
    env:
      DEVICE_NAME: ${{ matrix.benchmark.device_name }}
      SHARD_INDEX: ${{ matrix.benchmark.shard.index }}
      SHARD_COUNT: ${{ matrix.benchmark.shard.count }}
      PLATFORM_ARCH: ${{ matrix.benchmark.host_environment.platform }}-${{ matrix.benchmark.host_environment.architecture }}
      E2E_TEST_ARTIFACTS_GCS_ARTIFACT_DIR: ${{ inputs.e2e-test-artifacts-gcs-artifact-dir }}
      BENCHMARK_RESULTS_DIR: benchmark-results
    outputs:
      benchmark-results-dir: ${{ env.BENCHMARK_RESULTS_DIR }}
      # Ideally this should be defined in env, so it can be used in the upload
      # step. But Github CI doesn't allow us to access env.GCS in env.
      benchmark-results-gcs-artifact-dir: ${{ env.GCS_DIR }}/${{ env.BENCHMARK_RESULTS_DIR }}
    steps:
      - name: "Checking out repository"
        uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3 # v3.5.0
      - name: "Checking out runtime submodules"
        run: ./build_tools/scripts/git/update_runtime_submodules.sh
      - name: "Downloading benchmark tools"
        id: download-tools
        env:
          # See `build_benchmark_tools` step for the name format of benchmark tools artifacts.
          BENCHMARK_TOOLS_ARCHIVE: ${{ env.PLATFORM_ARCH }}-benchmark-tools.tar
          BENCHMARK_TOOLS_GCS_ARTIFACT: ${{ inputs.benchmark-tools-gcs-artifact-dir }}/${{ env.PLATFORM_ARCH }}-benchmark-tools.tar
        run: |
          gcloud storage cp "${BENCHMARK_TOOLS_GCS_ARTIFACT}" "${BENCHMARK_TOOLS_ARCHIVE}"
          echo "benchmark-tools-archive=${BENCHMARK_TOOLS_ARCHIVE}" >> "${GITHUB_OUTPUT}"
      - name: "Downloading benchmark assets"
        id: download-assets
        run: |
          gcloud storage cp "${BENCHMARK_CONFIG_GCS_ARTIFACT}" "${BENCHMARK_CONFIG}"
          echo "benchmark-config=${BENCHMARK_CONFIG}" >> "${GITHUB_OUTPUT}"
      - name: "Unpacking benchmark tools"
        id: unpack-tools
        env:
          BENCHMARK_TOOLS_ARCHIVE: ${{ steps.download-tools.outputs.benchmark-tools-archive }}
          # See `build_benchmark_tools` step for the name format of benchmark tools directory.
          BENCHMARK_TOOLS_DIR: ${{ env.PLATFORM_ARCH }}-benchmark-tools-dir
        run: |
          tar -xf ${BENCHMARK_TOOLS_ARCHIVE}
          echo "benchmark-tools-dir=${BENCHMARK_TOOLS_DIR}/build/tools" >> "${GITHUB_OUTPUT}"
      - name: "Determine Shard Suffix"
        id: sharding
        run: |
          if (( SHARD_COUNT > 1 )); then
            echo "suffix=$(printf -- "-%02d-of-%02d" "${SHARD_INDEX}" "${SHARD_COUNT}")" >> "${GITHUB_OUTPUT}"
          else
            echo "suffix=" >> "${GITHUB_OUTPUT}"
          fi
      - name: "Running benchmarks"
        env:
          IREE_EXECUTION_BENCHMARK_CONFIG: ${{ steps.download-assets.outputs.benchmark-config }}
          IREE_DOCKER_WRAPPER: ./build_tools/github_actions/docker_run.sh
          IREE_BENCHMARK_TOOLS_DIR: ${{ steps.unpack-tools.outputs.benchmark-tools-dir }}
          IREE_TARGET_DEVICE_NAME: ${{ env.DEVICE_NAME }}
          IREE_SHARD_INDEX: ${{ matrix.benchmark.shard.index }}
          IREE_BENCHMARK_RESULTS: ${{ env.BENCHMARK_RESULTS_DIR }}/benchmark-results-${{ matrix.benchmark.device_name }}${{ steps.sharding.outputs.suffix }}.json
        run: |
          mkdir -p ${BENCHMARK_RESULTS_DIR}
          export IREE_E2E_TEST_ARTIFACTS_DIR="${E2E_TEST_ARTIFACTS_GCS_ARTIFACT_DIR/gs:\/\//https://storage.googleapis.com/}"
          ./build_tools/benchmarks/run_benchmarks.sh
      - name: "Uploading benchmark results"
        run: gcloud storage cp -r "${BENCHMARK_RESULTS_DIR}" "${GCS_DIR}/"