Arm build and runner CI

.ci/docker/build.sh

@@ -26,6 +26,9 @@ case "${IMAGE_NAME}" in
   executorch-ubuntu-22.04-linter)
     LINTRUNNER=yes
     ;;
+  executorch-ubuntu-22.04-arm-sdk)
+    ARM_SDK=yes
+    ;;
   *)
     echo "Invalid image name ${IMAGE_NAME}"
     exit 1
@@ -41,6 +44,9 @@ BUILD_DOCS=1
 # Copy requirements-lintrunner.txt from root to here
 cp ../../requirements-lintrunner.txt ./
 
+# Copy arm setup script from root to here
+cp -r ../../examples/arm/ ./arm
+
 docker build \
   --no-cache \
   --progress=plain \
@@ -52,8 +58,9 @@ docker build \
   --build-arg "TORCHAUDIO_VERSION=${TORCHAUDIO_VERSION}.${NIGHTLY}" \
   --build-arg "TORCHVISION_VERSION=${TORCHVISION_VERSION}.${NIGHTLY}" \
   --build-arg "BUCK2_VERSION=${BUCK2_VERSION}" \
-  --build-arg "LINTRUNNER=${LINTRUNNER}" \
+  --build-arg "LINTRUNNER=${LINTRUNNER:-}" \
   --build-arg "BUILD_DOCS=${BUILD_DOCS}" \
+  --build-arg "ARM_SDK=${ARM_SDK:-}" \
   -f "${OS}"/Dockerfile \
   "$@" \
   .

.ci/docker/ubuntu/Dockerfile

@@ -51,5 +51,10 @@ COPY ./requirements-lintrunner.txt requirements-lintrunner.txt
 RUN if [ -n "${LINTRUNNER}" ]; then bash ./install_linter.sh; fi
 RUN rm install_linter.sh utils.sh requirements-lintrunner.txt
 
+ARG ARM_SDK
+COPY --chown=ci-user:ci-user ./arm /opt/arm
+# Set up ARM SDK if needed
+RUN if [ -n "${ARM_SDK}" ]; then git config --global user.email "[email protected]"; git config --global user.name "OSS CI"; bash /opt/arm/setup.sh --i-agree-to-the-contained-eula /opt/arm-sdk; chown -R ci-user:ci-user /opt/arm-sdk; fi
+
 USER ci-user
 CMD ["bash"]

.github/workflows/docker-builds.yml

@@ -27,6 +27,7 @@ jobs:
         include:
           - docker-image-name: executorch-ubuntu-22.04-clang12
           - docker-image-name: executorch-ubuntu-22.04-linter
+          - docker-image-name: executorch-ubuntu-22.04-arm-sdk
     env:
       DOCKER_IMAGE: 308535385114.dkr.ecr.us-east-1.amazonaws.com/executorch/${{ matrix.docker-image-name }}
     steps:

.github/workflows/trunk.yml

@@ -131,6 +131,24 @@ jobs:
         # Test selective build
         PYTHON_EXECUTABLE=python bash examples/portable/scripts/test_demo_backend_delegation.sh "${BUILD_TOOL}"
 
+  test-arm-backend-delegation:
+    name: test-arm-backend-delegation
+    uses: pytorch/test-infra/.github/workflows/linux_job.yml@main
+    with:
+      runner: linux.2xlarge
+      docker-image: executorch-ubuntu-22.04-arm-sdk
+      submodules: 'true'
+      ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}
+      script: |
+        # The generic Linux job chooses to use base env, not the one setup by the image
+        CONDA_ENV=$(conda env list --json | jq -r ".envs | .[-1]")
+        conda activate "${CONDA_ENV}"
+
+        PYTHON_EXECUTABLE=python bash .ci/scripts/setup-linux.sh cmake
+        # Test selective build
+        source /opt/arm-sdk/setup_path.sh
+        PYTHON_EXECUTABLE=python bash examples/arm/run.sh /opt/arm-sdk buck2
+
   test-coreml-delegate:
     name: test-coreml-delegate
     uses: pytorch/test-infra/.github/workflows/macos_job.yml@main

backends/arm/arm_backend.py

@@ -196,9 +196,7 @@ def vela_compile(tosa_fb):
             # Add a block for scratch, inputs and outputs;  scratch shape is a 1 element
             # array giving us size in bytes so extract this and add a block of 0's.
             # Currently we preallocated this on the host to provide SRAM for computation.
-            if len(data["scratch_shape"][0]) != 1:
-                raise RuntimeError("Expected scratch to be single array")
-            block_length = data["scratch_shape"][0].item()
+            block_length = int(data["scratch_shape"][0])
             bin_blocks["scratch_data"] = b"\x00" * block_length
 
             # Capture inputs and outputs