Cap CMake Build parallelism to avoid OOM-cancelled runners - #190
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Unbounded --parallel starts one compiler invocation per core; on heavily-templated C++ (e.g. sigma's TaylorModel headers) that can exceed a GitHub-hosted runner's RAM, OOM-killing the runner's own listener process. GitHub Actions then reports the job as cancelled (exit 143) instead of a normal build failure, which is what happened 3/3 times on Integrals#171's (ubuntu-latest, gcc-14) sigma job while every other matrix cell passed. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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🚀 [bumpr] Bumped! |
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Summary
cmake_buildcomposite action's Build step used unboundedcmake --build build --parallel(defaults to nproc concurrent compiler invocations).TaylorModelheaders), that can push memory use past what a GitHub-hosted runner has available, OOM-killing the runner's own listener process. GitHub Actions then reports the job as cancelled (exit 143 / "runner has received a shutdown signal") rather than a normal build failure.test_enable_sigma / test_cmake_build (ubuntu-latest, gcc-14)job, always dying mid-compile, while every other matrix cell (including the same sigma build on macos-14 and on ubuntu-latest/clang-18) passed cleanly.nproc(minimum 1) instead of leaving it unbounded.Test plan
test_enable_sigma / test_cmake_build (ubuntu-latest, gcc-14)job on Integrals#171 (it references this action via@master) and confirm it completes without cancellation🤖 Generated with Claude Code