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Andrea Righi
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Merge pull request raspberrypi#116 from arighi/github-ci
ci: add github workflow to test the sched-ext kernel
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‎.github/workflows/run-schedulers

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#!/bin/bash
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#
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# Run sched-ext scheduler for TIMEOUT seconds inside virtme-ng and catch
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# potential errors, then unload the scheduler and return the exit status.
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# Maximum time for each scheduler run.
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TEST_TIMEOUT=30
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# Maximum timeout for the guest used for each scheduler run (this is used to
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# hard-shutdown the guest in case of system hangs).
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GUEST_TIMEOUT=60
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# Check if virtme-ng is available.
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if [ ! -x `which vng` ]; then
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echo "vng not found, please install virtme-ng to enable testing"
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exit 1
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fi
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# Test all the available schedulers.
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#
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# NOTE: virtme-ng automatically runs the kernel from the current working
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# directory by default.
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#
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# Each scheduler will be tested in a separate instance booted from scratch, to
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# ensure that each run does not impact the others.
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#
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# TODO: exclude scx_layered for now, because it requires a special config
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# file, otherwise its test would fail with "Error: No layer spec".
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#
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# Maybe in the future change scx_layered to run with a default layer spec, just
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# for testing it.
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#
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for sched in $(find tools/sched_ext/build/bin -type f -executable | grep -v scx_layered); do
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rm -f /tmp/output
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(timeout --foreground --preserve-status ${GUEST_TIMEOUT} \
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vng --force-9p --disable-microvm --verbose -- \
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"timeout --foreground --preserve-status ${TEST_TIMEOUT} ${sched}" \
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2>&1 </dev/null || true) | tee /tmp/output
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sed -n -e '/\bBUG:/q1' \
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-e '/\bWARNING:/q1' \
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-e '/\berror\b/Iq1' \
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-e '/\bstall/Iq1' \
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-e '/\btimeout\b/Iq1' /tmp/output
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res=$?
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if [ ${res} -ne 0 ]; then
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echo "FAIL: ${sched}"
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exit 1
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else
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echo "OK: ${sched}"
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fi
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done

‎.github/workflows/sched-ext.config

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# sched-ext mandatory options
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#
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CONFIG_BPF=y
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CONFIG_BPF_SYSCALL=y
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CONFIG_BPF_JIT=y
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CONFIG_DEBUG_INFO_BTF=y
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CONFIG_BPF_JIT_ALWAYS_ON=y
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CONFIG_BPF_JIT_DEFAULT_ON=y
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CONFIG_SCHED_CLASS_EXT=y
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# Enable scheduling debugging
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#
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CONFIG_SCHED_DEBUG=y
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# Enable extra scheduling features (for a better code coverage while testing
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# the schedulers)
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#
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CONFIG_SCHED_AUTOGROUP=y
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CONFIG_SCHED_CORE=y
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# Enable fully preemptible kernel for a better test coverage of the schedulers
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#
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# CONFIG_PREEMPT_NONE is not set
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# CONFIG_PREEMPT_VOLUNTARY is not set
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CONFIG_PREEMPT=y
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CONFIG_PREEMPT_COUNT=y
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CONFIG_PREEMPTION=y
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CONFIG_PREEMPT_DYNAMIC=y
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CONFIG_PREEMPT_RCU=y
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# Additional debugging information (useful to catch potential locking issues)
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#
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CONFIG_DEBUG_LOCKDEP=y
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CONFIG_DEBUG_ATOMIC_SLEEP=y

‎.github/workflows/test-kernel.yml

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name: test-kernel
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run-name: ${{ github.actor }} PR run
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on: [pull_request, push]
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jobs:
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test-schedulers:
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runs-on: ubuntu-22.04
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steps:
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### OTHER REPOS ####
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# Hard turn-off interactive mode
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- run: echo 'debconf debconf/frontend select Noninteractive' | sudo debconf-set-selections
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# Refresh packages list
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- run: sudo apt update
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### DOWNLOAD AND INSTALL DEPENDENCIES ###
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# Download dependencies packaged by Ubuntu
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- run: sudo apt -y install gcc make git coreutils cmake elfutils libelf-dev libunwind-dev libzstd-dev linux-headers-generic linux-tools-common linux-tools-generic ninja-build python3-pip python3-requests qemu-kvm udev iproute2 busybox-static libvirt-clients kbd kmod file rsync zstd pahole flex bison cpio libcap-dev libelf-dev python3-dev cargo rustc
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# clang 17
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# Use a custom llvm.sh script which includes the -y flag for
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# add-apt-repository. Otherwise, the CI job will hang. If and when
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# https://github.com/opencollab/llvm-jenkins.debian.net/pull/26 is
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# merged, we can go back to using https://apt.llvm.org/llvm.sh.
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- run: wget https://raw.githubusercontent.com/Decave/llvm-jenkins.debian.net/fix_llvmsh/llvm.sh
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- run: chmod +x llvm.sh
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- run: sudo ./llvm.sh all
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- run: sudo ln -sf /usr/bin/clang-17 /usr/bin/clang
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- run: sudo ln -sf /usr/bin/llvm-strip-17 /usr/bin/llvm-strip
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# Checkout repository
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- uses: actions/checkout@v4
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# Install virtme-ng
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- run: pip install virtme-ng
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### END DEPENDENCIES ###
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# Build a minimal kernel (with sched-ext enabled) using virtme-ng
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- run: vng -v --build --config .github/workflows/sched-ext.config
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# Build the in-kernel schedulers
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- run: cd tools/sched_ext && make
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# Test the schedulers inside the recompile kernel
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- run: .github/workflows/run-schedulers

‎.gitignore

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# Rust analyzer configuration
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/rust-project.json
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# Include ".github" directory
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!.github/

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