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Use minimal PAL and nano libraries in Cortex-M size tests #24216

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Merged
rascani merged 2 commits into from
Oct 28, 2026
Merged

Use minimal PAL and nano libraries in Cortex-M size tests #24216

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17b99e6
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rascani Oct 27, 2026
038aacb
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rascani Oct 27, 2026
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16 changes: 11 additions & 5 deletions .github/workflows/pull.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -729,12 +729,12 @@ jobs:
setup_script_args=""
if [[ ${{ matrix.os}} == "bare_metal" ]]; then
toolchain_prefix=arm-none-eabi-
threshold="118000" # GCC 15.2 baseline: 115868 bytes, 2026-05-13
threshold="34000" # GCC 15.2, minimal PAL + nano baseline: 33372 bytes, 2026-10-27
toolchain_cmake=examples/arm/ethos-u-setup/arm-none-eabi-gcc.cmake
elif [[ ${{ matrix.os}} == "zephyr-preset" ]]; then
setup_script_args="--target-toolchain zephyr"
toolchain_prefix=arm-zephyr-eabi-
threshold="136020" # 136 KiB
threshold="57000" # Zephyr SDK 1.0.1, minimal PAL baseline: 55800 bytes, 2026-10-27
toolchain_cmake=examples/zephyr/x86_64-linux-arm-zephyr-eabi-gcc.cmake
else
echo "Unsupported OS selection: ${{ matrix.os }}"
Expand All @@ -752,11 +752,17 @@ jobs:
# Setup cmake target to desired toolchain
toolchain_cmake=$(realpath ${toolchain_cmake})

# Build and run size test
# Measure the embedded runtime with minimal PAL.
if [[ ${{ matrix.os}} == "bare_metal" ]]; then
bash test/build_size_test.sh "-DCMAKE_TOOLCHAIN_FILE=${toolchain_cmake} -DEXECUTORCH_BUILD_ARM_BAREMETAL=ON"
# Use nano libc and libstdc++ without exception support.
bash test/build_size_test.sh \
"-DCMAKE_TOOLCHAIN_FILE=${toolchain_cmake}" \
-DEXECUTORCH_BUILD_ARM_BAREMETAL=ON \
-DEXECUTORCH_PAL_DEFAULT=minimal \
-DCMAKE_C_FLAGS_INIT=--specs=nano.specs \
-DCMAKE_CXX_FLAGS_INIT=--specs=nano.specs
elif [[ ${{ matrix.os}} == "zephyr-preset" ]]; then
CXXFLAGS=${cxx_flags} cmake --preset zephyr -DCMAKE_BUILD_TYPE=Release -DEXECUTORCH_OPTIMIZE_SIZE=ON -DEXECUTORCH_BUILD_EXTENSION_DATA_LOADER=ON -DCMAKE_INSTALL_PREFIX=cmake-out -Bcmake-out .
CXXFLAGS=${cxx_flags} cmake --preset zephyr -DCMAKE_BUILD_TYPE=Release -DEXECUTORCH_OPTIMIZE_SIZE=ON -DEXECUTORCH_PAL_DEFAULT=minimal -DEXECUTORCH_BUILD_EXTENSION_DATA_LOADER=ON -DCMAKE_INSTALL_PREFIX=cmake-out -Bcmake-out .
cmake --build cmake-out -j9 --target install --config Release
CXXFLAGS=${cxx_flags} cmake -DCMAKE_TOOLCHAIN_FILE=${toolchain_cmake} -DEXECUTORCH_SIZE_TEST_NO_OS_LINK=ON -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=cmake-out -Bcmake-out/test test
cmake --build cmake-out/test -j9 --config Release
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