ci: run gpu tests for cutile-rs

.github/workflows/cutile-rs.yml

@@ -155,8 +155,11 @@ jobs:
           command -v tileiras
           tileiras --help | grep -q "sm_120"
 
+      - uses: $/cutile-rs/.github/actions/setup
       - uses: actions/checkout@v7
-      - uses: ./cutile-rs/.github/actions/setup
+
+      - name: Mark checkout as safe
+        run: git config --global --add safe.directory /__w/cuda-rust/cuda-rust
 
       # Cheapest checks first so a formatting or lint slip fails in seconds.
       - name: Format check
@@ -184,6 +187,71 @@ jobs:
       - name: CPU only tests
         run: ./scripts/run_cpu_tests.sh
 
+      # nextest archives carry test executables, Cargo metadata, and build
+      # outputs needed to run on another machine without rebuilding Rust.
+      # Keep both workspaces separate, then bundle them in one downloadable tar.
+      - uses: taiki-e/install-action@9114bf4d891761788c546334fd37538eae1bf8b3  # v2.87.16
+        name: Install cargo-nextest
+        with:
+          tool: cargo-nextest
+
+      - name: Archive Tile runtime test packages
+        run: |
+          mkdir -p "$RUNNER_TEMP/cutile-gpu-tests"
+          cargo nextest archive --locked --features experimental-tune \
+            --archive-file "$RUNNER_TEMP/cutile-gpu-tests/tile-tests.tar.zst"
+
+      - name: Archive shared-host runtime test packages
+        working-directory: ${{ github.workspace }}
+        run: |
+          cargo nextest archive --locked \
+            -p cuda-bindings -p cuda-core -p cuda-async \
+            --archive-file "$RUNNER_TEMP/cutile-gpu-tests/host-tests.tar.zst"
+
+      - name: Bundle runtime test archives
+        run: |
+          cp "$(command -v cargo-nextest)" "$RUNNER_TEMP/cutile-gpu-tests/cargo-nextest"
+          git rev-parse HEAD > "$RUNNER_TEMP/cutile-gpu-tests/revision.txt"
+          cargo nextest --version > "$RUNNER_TEMP/cutile-gpu-tests/nextest-version.txt"
+          tar -cf "$RUNNER_TEMP/cutile-gpu-tests.tar" \
+            -C "$RUNNER_TEMP/cutile-gpu-tests" .
+
+      - name: Upload runtime test packages
+        uses: actions/upload-artifact@v4
+        with:
+          name: cutile-gpu-tests
+          path: ${{ runner.temp }}/cutile-gpu-tests.tar
+          if-no-files-found: error
+          compression-level: 0 # The nested nextest archives are already compressed.
+          retention-days: 1
+
+  gpu-tests:
+    needs: build
+    runs-on: linux-amd64-gpu-rtxpro6000-latest-1
+    timeout-minutes: 30
+    container:
+      image: nvidia/cuda:13.3.0-devel-ubuntu24.04
+    env:
+      CUDA_TOOLKIT_PATH: /usr/local/cuda
+      CUTILE_TILEIRAS_PATH: /usr/local/cuda/bin/tileiras
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: actions/download-artifact@v4
+        with:
+          name: cutile-gpu-tests
+          path: ${{ runner.temp }}/gpu-tests
+
+      - name: Extract runtime test packages
+        run: |
+          tar -xf "$RUNNER_TEMP/gpu-tests/cutile-gpu-tests.tar" -C "$RUNNER_TEMP/gpu-tests"
+          test "$(cat "$RUNNER_TEMP/gpu-tests/revision.txt")" = "$GITHUB_SHA"
+          nvidia-smi
+          "$CUTILE_TILEIRAS_PATH" --version
+
+      - name: GPU runtime tests
+        run: ./scripts/run_gpu_tests.sh --archive-dir "$RUNNER_TEMP/gpu-tests"
+
   # Breaking API changes must ship with the right version bump: compare each
   # publishable crate's API against its latest crates.io release and fail the
   # PR when a break arrives without one (the 0.3.0 -> 0.3.1 lesson). Same

CONTRIBUTING.md

@@ -192,6 +192,17 @@ cutile-rs/scripts/run_all.sh         # both of the above, then the examples and
 
 Run `cutile-rs/scripts/run_all.sh` before marking a Tile pull request ready
 for review.
+
+The GPU script also accepts `--archive-dir DIR` to run prebuilt tests without
+Cargo or a Rust toolchain. The directory must contain `cargo-nextest`,
+`tile-tests.tar.zst`, and `host-tests.tar.zst`, as bundled by CI. This mode runs
+tests serially and uses the checkout for source fixtures.
+See the archive, bundle, and extract steps in
+[the Tile CI workflow](.github/workflows/cutile-rs.yml) for how to produce this
+directory. Extract `cutile-gpu-tests.tar` first and use a checkout matching its
+`revision.txt`; `cargo-nextest` must be executable. The script's opening comments
+describe the directory layout and the contents of each test archive.
+
 CI runs the same suites in `.github/workflows/cutile-rs.yml`. Because the Tile
 lanes use NVIDIA self-hosted runners, that workflow triggers on the
 `pull-request/<n>` branches that copy-pr-bot mirrors rather than on the pull

cutile-rs/.github/actions/setup/action.yml

@@ -19,8 +19,8 @@ runs:
   using: composite
   steps:
     - name: Validate inputs
+      working-directory: ${{ github.workspace }}
       shell: bash
-      working-directory: cutile-rs
       env:
         RUST_COMPONENTS: ${{ inputs.components }}
         RUST_CACHE: ${{ inputs.cache }}
@@ -35,8 +35,8 @@ runs:
         fi
 
     - name: Install build dependencies
+      working-directory: ${{ github.workspace }}
       shell: bash
-      working-directory: cutile-rs
       run: |
         apt-get update -qq
         apt-get install -y -qq --no-install-recommends build-essential curl \
@@ -47,7 +47,8 @@ runs:
     # nightly lives in cuda-oxide/rust-toolchain.toml.
     - name: Install Rust
       shell: bash
-      working-directory: cutile-rs
+      # relative path to land at the rust-toolchain.toml regardless of use of $ or ./ syntax
+      working-directory: ${{ github.action_path }}/../../..
       env:
         RUST_COMPONENTS: ${{ inputs.components }}
       run: |