feat(python): add cross-cutting gate scenarios for 3.14/3.15 (PROF-15511) - #172
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Add paired gil_contention, uvloop, and gevent scenarios for integration shapes on the migration gate path. Gate grows from 20 to 26 scenarios.
Python 3.14 uses Target.method stack frames and numeric thread IDs in alloc profiles; gevent Hub frames are Hub.run;loop.run. Simplify gevent assertions to percent-based checks, fix ruff format on safe_point_bias README, and widen node_heap space margin for CI variance.
Absolute object counts are unstable across Node CI runners; switch to percent-based checks with wider margins while keeping space assertions.
Drop node_heap objects checks (dominated by startup noise on CI); keep space ratio assertions. Widen node_code_hotspots busyLoop margin to 3%.
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Prev: #171
Motivation
Final batch of the default migration gate — integration-shaped workloads that stress the profiler under GIL contention, alternative event loops (uvloop), and greenlet-based concurrency (gevent). Completes the 22-scenario default downstream regexp.
Summary
Adds 6 scenario directories (3 families × 2 versions):
python_gil_contentionpython_uvlooppython_geventAll paired 3.14/3.15; 3.15 dirs wheel-only.
Gate grows 16 → 22 scenarios. Feature-specific pairs (
mem_domain,live_heap) remain in parallel PRs #167 / #168.After this stack lands: wire dd-trace-py downstream job to pass the gate regexp (not bare
python.*), then tighten to blocking once CI is stable.Test plan
go test -run TestSchemaValidationruff checkon scenario sourcesDDTRACE_INSTALL_URL