feat(uv): monitor wheel build memory#1174
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xangcastle merged 1 commit intoJun 24, 2026
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Add an explicit monitor_memory package override for source-built wheels. Sample the build process tree through Linux procfs and emit flushed high-water reports so failed or OOM-killed builds leave evidence for calibrating resource_set. Keep monitoring independent from scheduler reservations. Launch the PEP 517 frontend in the existing Bazel process group and leave cancellation to Bazel; the sampler observes descendants but never signals them. Only add the monitor dependency to opted-in generated build tools. Reject prebuilt-only packages and custom BUILD replacements that have no generated wheel action to instrument.
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Extracted from #1140. That patch coupled memory diagnostics to resource |
jbedard
approved these changes
Jun 24, 2026
xangcastle
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Jun 24, 2026
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Large source-built wheels can exhaust memory before their action logs show
enough evidence to size a scheduler reservation.
Add an explicit
monitor_memorypackage override that samples approximateLinux procfs RSS for the PEP 517 frontend and its descendants. Emit the
first sample, 256 MiB high-water crossings, and a final peak. Preserve
earlier samples across procfs races and identify a direct SIGKILL as a
possible OOM.
Keep diagnostics independent from
resource_set. The monitor inherits theBazel process group and never installs signal handlers or kills child
processes, so Bazel retains cancellation ownership. Only opted-in generated
build tools carry the monitor dependency.
Apply monitoring only to generated sdist actions. Selecting a compatible
prebuilt wheel produces no report; prebuilt-only packages and complete
custom BUILD replacements reject the override.