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https://github.com/Cockatrice/Cockatrice.git
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2b515d0866
--mount type=bind refuses a missing source, and docker.sh only creates its default cache directory, so both probe builds died at the mount.
103 lines
3.8 KiB
YAML
103 lines
3.8 KiB
YAML
---
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# Throwaway diagnostic: why does master's ccache serve only ~14% of calls when a
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# whole pull-request cache is restored?
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#
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# Result so far (run 41818008344): one Arch configuration costs 1.2 GB with the
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# default flags, and a cache bigger than that serves 1058 of 1059 calls. The 700M
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# bound therefore cannot hold one build, and a cache just under the working set
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# evicts exactly what the next build asks for.
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#
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# This run measures the only lever that can make one configuration fit a bound:
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# less debug info. Every leg's objects carry full DWARF (Debug uses -ggdb, and
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# CrashReporting adds -g to Release whenever the SDK is on), and debug info
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# dominates the compressed object.
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#
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# Two jobs, two cold builds each, no Actions cache, so the repository quota is
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# untouched:
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# -g0 no debug info at all: the lower bound of what a cache could cost
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# -g1 file and line only: what a backtrace needs, and the candidate default
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# `du` of each cache dir is the number to compare against 1.2 GB.
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name: ccache probe
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on:
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push:
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branches:
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- ci/ccache-probe
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pull_request:
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branches:
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- master
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concurrency:
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group: ${{ github.workflow }} @ ${{ github.ref_name }}
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cancel-in-progress: true
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jobs:
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probe:
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name: ${{ matrix.label }} debug info
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runs-on: ubuntu-latest
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timeout-minutes: 150
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strategy:
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fail-fast: false
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matrix:
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include:
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# The debug leg: -ggdb on every object.
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- label: Arch
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name: Arch
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leg: --server --debug --test --cmake-generator Ninja
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run_env: ''
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# The release leg that packages: CrashReporting adds -g on top of -O2.
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- label: Debian 13
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name: Debian13
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leg: --server --release --test --cmake-generator Ninja
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run_env: '-e WITH_CRASH_REPORTING=ON'
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env:
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NAME: ${{ matrix.name }}
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CACHE: ${{ github.workspace }}/.cache/${{ matrix.name }}
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# Far above any candidate working set: a cache that evicts cannot be measured.
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CCACHE_BOUND: 6G
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steps:
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- name: "Checkout"
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uses: actions/checkout@v7
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- name: "Build image and record the compiler's identity"
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shell: bash
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run: |
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source .ci/docker.sh --build
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docker image inspect --format 'image id: {{.Id}}' "$IMAGE_NAME"
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echo "=== compiler as ccache sees it (compiler_check = mtime hashes mtime and size)"
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docker run --rm "$IMAGE_NAME" bash -c 'for c in c++ cc gcc g++; do p="$(command -v $c)"; [ -n "$p" ] && stat -c "%n size=%s mtime=%Y" "$p"; done; c++ --version | head -1'
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- name: "Cold build with -g0"
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shell: bash
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run: |
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rm -rf build
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source .ci/docker.sh
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export RUN_ARGS="$RUN_ARGS ${{ matrix.run_env }}"
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# One cache directory per measurement: a shared one would mix the two results.
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export CCACHE_DIR="$CACHE/.ccache-g0"
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# --mount type=bind refuses a source that does not exist, and docker.sh only
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# creates its default cache directory.
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mkdir -p "$CCACHE_DIR"
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export RUN_ARGS="$RUN_ARGS -e PROBE_CMAKE_ARGS=-DCOCKATRICE_DEBUG_INFO_LEVEL=0"
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RUN ${{ matrix.leg }} --ccache "$CCACHE_BOUND"
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echo "=== cache for -g0"
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du -sh "$CCACHE_DIR"
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- name: "Cold build with -g1"
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shell: bash
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run: |
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rm -rf build
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source .ci/docker.sh
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export RUN_ARGS="$RUN_ARGS ${{ matrix.run_env }}"
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export CCACHE_DIR="$CACHE/.ccache-g1"
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mkdir -p "$CCACHE_DIR"
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export RUN_ARGS="$RUN_ARGS -e PROBE_CMAKE_ARGS=-DCOCKATRICE_DEBUG_INFO_LEVEL=1"
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RUN ${{ matrix.leg }} --ccache "$CCACHE_BOUND"
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echo "=== cache for -g1"
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du -sh "$CCACHE_DIR"
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- name: "Both measurements"
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shell: bash
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run: |
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du -sh "$CACHE"/.ccache-* | sed 's/^/ /'
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