docs(profiling-315): py3.15 dev tooling and CPython upgrade runbook by vlad-scherbich · Pull Request #19273 · DataDog/dd-trace-py

vlad-scherbich · 2026-07-24T01:52:07Z

prev: #19272

Description

Delta vs #19272.

Adds docs/contributing-profiling-new-cpython.rst, docs/cpython-diffs/analysis_314_to_315.md, scripts/verify_profiler_compatibility.py, scripts/run-profiling-tests, compatibility baselines, AGENTS.md / type-annotate notes, and scripts/py315-stack/ bring-up files (including stale draft PR bodies).

No runtime profiler change.

Testing

Risks

Additional Notes

Docs and scripts only.

Contributes to #17817

datadog-prod-us1-3 · 2026-07-24T01:52:40Z

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cit-pr-commenter-54b7da · 2026-07-24T01:54:14Z

Codeowners resolved as

Resolved from the full PR diff against vlad/ddtracepy-315-profiling-asyncio-monitoring using the target branch CODEOWNERS file.
CODEOWNERS team requests not listed below are not required by the current file set.

.claude/skills/type-annotate/SKILL.md                                   @DataDog/python-guild
AGENTS.md                                                               @DataDog/python-guild
docs/contributing-profiling-new-cpython.rst                             @DataDog/python-guild
docs/contributing-testing.rst                                           @DataDog/python-guild
docs/contributing.rst                                                   @DataDog/python-guild
docs/cpython-diffs/analysis_314_to_315.md                               @DataDog/python-guild
scripts/profiles/compatibility_baselines.json                           @DataDog/profiling-python
scripts/py315-stack/DRAFT_PRS.md                                        @DataDog/python-guild
scripts/py315-stack/MANUAL_EXISTING_PRS.md                              @DataDog/python-guild
scripts/py315-stack/PROFILING_STACK.md                                  @DataDog/python-guild
scripts/py315-stack/TRACKING.md                                         @DataDog/python-guild
scripts/py315-stack/generate-pr-urls.sh                                 @DataDog/python-guild
scripts/py315-stack/open-all-draft-prs.sh                               @DataDog/python-guild
scripts/py315-stack/pr-bodies/01-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/01-gab-315-monitoring-multiplexer.md      @DataDog/python-guild
scripts/py315-stack/pr-bodies/02-chore-315-wrapping-context.md          @DataDog/python-guild
scripts/py315-stack/pr-bodies/02-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/03-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/03-vlad-315-ci-matrix.md                  @DataDog/python-guild
scripts/py315-stack/pr-bodies/04-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/04-vlad-315-ci-autoregen-lockfiles.md     @DataDog/python-guild
scripts/py315-stack/pr-bodies/05-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/05-vlad-315-official-support.md           @DataDog/python-guild
scripts/py315-stack/pr-bodies/05-vlad-315-peripheral-compat.md          @DataDog/python-guild
scripts/py315-stack/pr-bodies/06-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/06-vlad-315-peripheral-compat.md          @DataDog/python-guild
scripts/py315-stack/pr-bodies/06-vlad-profiling-native-test-install-subdir.md  @DataDog/python-guild
scripts/py315-stack/pr-bodies/07-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/07-vlad-ddtracepy-315-profiling-native.md  @DataDog/python-guild
scripts/py315-stack/pr-bodies/07-vlad-profiling-native-test-install-subdir.md  @DataDog/python-guild
scripts/py315-stack/pr-bodies/08-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/08-vlad-ddtracepy-315-profiling-collectors.md  @DataDog/python-guild
scripts/py315-stack/pr-bodies/08-vlad-ddtracepy-315-profiling-native.md  @DataDog/python-guild
scripts/py315-stack/pr-bodies/09-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/09-vlad-ddtracepy-315-profiling-collectors.md  @DataDog/python-guild
scripts/py315-stack/pr-bodies/09-vlad-ddtracepy-315-profiling-only.md   @DataDog/python-guild
scripts/py315-stack/pr-bodies/10-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/10-vlad-ddtracepy-315-profiling-asyncio-monitoring.md  @DataDog/python-guild
scripts/py315-stack/pr-bodies/10-vlad-ddtracepy-315-profiling-only.md   @DataDog/python-guild
scripts/py315-stack/pr-bodies/11-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/11-vlad-315-profiling-dev-tooling.md      @DataDog/python-guild
scripts/py315-stack/pr-bodies/11-vlad-ddtracepy-315-profiling-asyncio-monitoring.md  @DataDog/python-guild
scripts/py315-stack/pr-bodies/12-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/12-vlad-315-lib-injection-ssi.md          @DataDog/python-guild
scripts/py315-stack/pr-bodies/12-vlad-315-profiling-dev-tooling.md      @DataDog/python-guild
scripts/py315-stack/pr-bodies/13-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/13-vlad-315-lib-injection-ssi.md          @DataDog/python-guild
scripts/py315-stack/pr-bodies/13-vlad-315-profiling-release-note.md     @DataDog/python-guild
scripts/py315-stack/pr-bodies/14-compare.url                            @DataDog/python-guild
scripts/py315-stack/pr-bodies/14-vlad-315-official-support.md           @DataDog/python-guild
scripts/py315-stack/pr-bodies/14-vlad-315-profiling-release-note.md     @DataDog/python-guild
scripts/py315-stack/pr-bodies/VERSION-AUDIT-DRAFTS.md                   @DataDog/python-guild
scripts/py315-stack/pr-numbers.env                                      @DataDog/python-guild
scripts/py315-stack/rebuild-stack.sh                                    @DataDog/python-guild
scripts/py315-stack/sync-pr-numbers.sh                                  @DataDog/python-guild
scripts/run-profiling-tests                                             @DataDog/python-guild
scripts/verify_profiler_compatibility.py                                @DataDog/python-guild

cit-pr-commenter-54b7da · 2026-07-24T01:54:16Z

Circular import analysis

⚠️ Existing circular imports

There are 3 circular imports that already exist on the base branch and have not been changed by this PR.

ddtrace.llmobs -> ddtrace.llmobs._evaluators -> ddtrace.llmobs._evaluators.format -> ddtrace.llmobs._experiment -> ddtrace.llmobs
ddtrace.errortracking._handled_exceptions.bytecode_injector -> ddtrace.errortracking._handled_exceptions.callbacks -> ddtrace.errortracking._handled_exceptions.collector -> ddtrace.errortracking._handled_exceptions.bytecode_reporting -> ddtrace.errortracking._handled_exceptions.bytecode_injector
ddtrace.appsec._asm_request_context -> ddtrace.appsec._iast._iast_request_context_base -> ddtrace.appsec._iast._iast_env -> ddtrace.appsec._iast.reporter -> ddtrace.appsec._exploit_prevention.stack_traces -> ddtrace.appsec._asm_request_context

cit-pr-commenter-54b7da · 2026-08-21T18:47:14Z

Dependency direction analysis

⚠️ Existing dependency direction violations

There are 240 dependency direction violations that already exist on the base branch and have not been changed by this PR.

Show existing violations (showing 5 of 240 highest severity)

ddtrace.internal.tracemethods -×-> ddtrace.trace  (internal-core -> product:tracing, score=135)
ddtrace.llmobs._integrations.openai -×-> ddtrace.trace  (product:llmobs -> product:tracing, score=133)
ddtrace.internal.test_visibility.api -×-> ddtrace.trace  (product:ci_visibility -> product:tracing, score=133)
ddtrace.debugging._signal.tracing -×-> ddtrace.trace  (product:debugging -> product:tracing, score=133)
ddtrace.internal.ci_visibility.filters -×-> ddtrace.trace  (product:ci_visibility -> product:tracing, score=133)

To see all violations, download the layers-base.json and layers-pr.json artifacts from this CI job and run:
uv run --script scripts/import-analysis/layers.py compare layers-base.json layers-pr.json

Drop 6-PR / 14-PR numbering. Live stack is #19267 → #19269 → #19270 → #19272 → #19273. Leave #17849 and official-support / riot off this chain.

Copilot

Pull request overview

Adds Python 3.15 profiling bring-up tooling and documentation to support the ongoing py3.15 profiling stack work: a standalone profiler compatibility verifier, a one-command profiling test runner, CPython 3.14→3.15 ABI change notes, and a maintainer runbook for bringing profiling up on new CPython minors.

Changes:

Introduces scripts/verify_profiler_compatibility.py (asyncio guard validation + real pprof sample collection + baseline compare) and scripts/run-profiling-tests (runner wiring compatibility checks + Riot profiling suites).
Adds py3.15 stack navigation/helpers under scripts/py315-stack/ (tracking, PR body generation, PR-number syncing, historical rebuild notes).
Adds/updates documentation for CPython 3.15 profiling bring-up (docs/contributing-profiling-new-cpython.rst, docs/cpython-diffs/analysis_314_to_315.md) and links from contributor docs.

Reviewed changes

Copilot reviewed 57 out of 57 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
scripts/verify_profiler_compatibility.py	New Python script to validate asyncio profiling guards + collect/validate profiler samples and compare to stored baselines.
scripts/run-profiling-tests	New Bash runner to execute the compatibility script plus Riot profiling suites on a target Python.
scripts/py315-stack/TRACKING.md	Post-split tracking notes for remaining py3.15 parity follow-ups.
scripts/py315-stack/sync-pr-numbers.sh	Helper to sync PR numbers for stack navigation using `gh`.
scripts/py315-stack/rebuild-stack.sh	Historical script for rebuilding the older 14-PR stack chain.
scripts/py315-stack/PROFILING_STACK.md	Defines the live 5-PR profiling stack merge order and validation legs.
scripts/py315-stack/pr-numbers.env	Stores PR numbers for stack navigation tooling.
scripts/py315-stack/pr-bodies/VERSION-AUDIT-DRAFTS.md	Draft PR-body correction notes for version-claim audit.
scripts/py315-stack/pr-bodies/14-vlad-315-profiling-release-note.md	Generated PR body for historical stack layer 14 (release note).
scripts/py315-stack/pr-bodies/14-vlad-315-official-support.md	Generated PR body for historical stack layer 14 (official support).
scripts/py315-stack/pr-bodies/14-compare.url	Generated GitHub compare URL for historical stack layer 14.
scripts/py315-stack/pr-bodies/13-vlad-315-profiling-release-note.md	Generated PR body for historical stack layer 13 (release note).
scripts/py315-stack/pr-bodies/13-vlad-315-lib-injection-ssi.md	Generated PR body for historical stack layer 13 (SSI).
scripts/py315-stack/pr-bodies/13-compare.url	Generated GitHub compare URL for historical stack layer 13.
scripts/py315-stack/pr-bodies/12-vlad-315-profiling-dev-tooling.md	Generated PR body for historical stack layer 12 (dev tooling).
scripts/py315-stack/pr-bodies/12-vlad-315-lib-injection-ssi.md	Generated PR body for historical stack layer 12 (SSI).
scripts/py315-stack/pr-bodies/12-compare.url	Generated GitHub compare URL for historical stack layer 12.
scripts/py315-stack/pr-bodies/11-vlad-ddtracepy-315-profiling-asyncio-monitoring.md	Generated PR body for historical stack layer 11 (asyncio monitoring).
scripts/py315-stack/pr-bodies/11-vlad-315-profiling-dev-tooling.md	Generated PR body for historical stack layer 11 (dev tooling).
scripts/py315-stack/pr-bodies/11-compare.url	Generated GitHub compare URL for historical stack layer 11.
scripts/py315-stack/pr-bodies/10-vlad-ddtracepy-315-profiling-only.md	Generated PR body for historical stack layer 10 (profiling-only).
scripts/py315-stack/pr-bodies/10-vlad-ddtracepy-315-profiling-asyncio-monitoring.md	Generated PR body for historical stack layer 10 (asyncio monitoring).
scripts/py315-stack/pr-bodies/10-compare.url	Generated GitHub compare URL for historical stack layer 10.
scripts/py315-stack/pr-bodies/09-vlad-ddtracepy-315-profiling-only.md	Generated PR body for historical stack layer 9 (profiling-only).
scripts/py315-stack/pr-bodies/09-vlad-ddtracepy-315-profiling-collectors.md	Generated PR body for historical stack layer 9 (collectors).
scripts/py315-stack/pr-bodies/09-compare.url	Generated GitHub compare URL for historical stack layer 9.
scripts/py315-stack/pr-bodies/08-vlad-ddtracepy-315-profiling-native.md	Generated PR body for historical stack layer 8 (native ABI).
scripts/py315-stack/pr-bodies/08-vlad-ddtracepy-315-profiling-collectors.md	Generated PR body for historical stack layer 8 (collectors).
scripts/py315-stack/pr-bodies/08-compare.url	Generated GitHub compare URL for historical stack layer 8.
scripts/py315-stack/pr-bodies/07-vlad-profiling-native-test-install-subdir.md	Generated PR body for historical stack layer 7 (INSTALL_SUBDIR).
scripts/py315-stack/pr-bodies/07-vlad-ddtracepy-315-profiling-native.md	Generated PR body for historical stack layer 7 (native ABI).
scripts/py315-stack/pr-bodies/07-compare.url	Generated GitHub compare URL for historical stack layer 7.
scripts/py315-stack/pr-bodies/06-vlad-profiling-native-test-install-subdir.md	Generated PR body for historical stack layer 6 (INSTALL_SUBDIR).
scripts/py315-stack/pr-bodies/06-vlad-315-peripheral-compat.md	Generated PR body for historical stack layer 6 (peripheral compat).
scripts/py315-stack/pr-bodies/06-compare.url	Generated GitHub compare URL for historical stack layer 6.
scripts/py315-stack/pr-bodies/05-vlad-315-peripheral-compat.md	Generated PR body for historical stack layer 5 (peripheral compat).
scripts/py315-stack/pr-bodies/05-vlad-315-official-support.md	Generated PR body for historical stack layer 5 (official support).
scripts/py315-stack/pr-bodies/05-compare.url	Generated GitHub compare URL for historical stack layer 5.
scripts/py315-stack/pr-bodies/04-vlad-315-ci-autoregen-lockfiles.md	Generated PR body for historical stack layer 4 (lockfile regen).
scripts/py315-stack/pr-bodies/04-compare.url	Generated GitHub compare URL for historical stack layer 4.
scripts/py315-stack/pr-bodies/03-vlad-315-ci-matrix.md	Generated PR body for historical stack layer 3 (CI matrix).
scripts/py315-stack/pr-bodies/03-compare.url	Generated GitHub compare URL for historical stack layer 3.
scripts/py315-stack/pr-bodies/02-compare.url	Generated GitHub compare URL for historical stack layer 2.
scripts/py315-stack/pr-bodies/02-chore-315-wrapping-context.md	Generated PR body for historical stack layer 2 (wrapping context).
scripts/py315-stack/pr-bodies/01-gab-315-monitoring-multiplexer.md	Generated PR body for historical stack layer 1 (monitoring multiplexer).
scripts/py315-stack/pr-bodies/01-compare.url	Generated GitHub compare URL for historical stack layer 1.
scripts/py315-stack/open-all-draft-prs.sh	Helper to open compare URLs for drafting PRs in historical stack order.
scripts/py315-stack/MANUAL_EXISTING_PRS.md	Manual navigation notes for the live 5-PR stack and related PRs.
scripts/py315-stack/generate-pr-urls.sh	Generator for compare URLs and PR bodies (historical 14-PR chain).
scripts/py315-stack/DRAFT_PRS.md	Generated index of historical 14-PR compare URLs and bodies (archival).
scripts/profiles/compatibility_baselines.json	Adds saved compatibility baselines for 3.9–3.15 for the verifier script.
docs/cpython-diffs/analysis_314_to_315.md	New CPython 3.14→3.15 header/change analysis notes for Echion/profiling.
docs/contributing.rst	Adds link to the new profiling-on-new-CPython guide and updates toctree.
docs/contributing-testing.rst	Documents using `scripts/run-profiling-tests` for profiling validation on new Python versions.
docs/contributing-profiling-new-cpython.rst	New maintainer runbook for profiling bring-up on new CPython minors (stack/Echion, gating, CI, validation).
AGENTS.md	Documents the `type-annotate` skill in the project’s AI assistant guidance.
.claude/skills/type-annotate/SKILL.md	Adds the new `type-annotate` skill definition and workflow guidance.

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.

+    # Import _asyncio BEFORE asyncio to ensure the ModuleWatchdog callback is
+    # registered first. The callback fires when asyncio is subsequently imported.
+    # Importing asyncio triggers the ModuleWatchdog callback, which runs
+    # _call_init_asyncio() — exercising all the hasattr guards.
+    import asyncio
+
+    import ddtrace.profiling._asyncio as _asyncio_mod


+            failures.append(f"{suite}: was PASS in baseline, now FAIL — {cur.get('error', '?')}")
+
+        # Check sample count regression
+        if "wall_time_samples" in ref and "wall_time_samples" in cur:


+- Tagged int shift changed: `(i << 2)` instead of `(i << 2)` — same for non-debug,
+  but `Py_TAGGED_SHIFT = 2` is now the canonical name.


-``validate_supported_configurations_v2_local_file`` GitLab CI job to fail, displaying the missing keys
-in its output. A Datadog maintainer must add the key to the registry before the PR can merge.
-
 .. toctree::


Profiling bring-up scripts, compatibility baselines, Echion migration runbook, and py315-stack PR navigation helpers (PR 12/14).

Update pr-numbers, generate-pr-urls, MANUAL_EXISTING_PRS, and rebuild-stack to reflect linear stack with peripheral/profiling before packaging (#19254). Replacement PRs #19267–#19275 supersede wrongly-merged #19255–#19259.

Point the 3.15 runbook row at this stack instead of closed #17294/hasattr guards, and draft paste-ready PR bodies that do not treat sys.monitoring as a 3.15-only API.

Drop 6-PR / 14-PR numbering. Live stack is #19267 → #19269 → #19270 → #19272 → #19273. Leave #17849 and official-support / riot off this chain.

This was referenced Jul 24, 2026

chore(py-315): enable lib-injection SSI for Python 3.15 #19274

Closed

refactor(profiling-315): sys.monitoring asyncio path for py3.15 #19272

Draft

vlad-scherbich mentioned this pull request Jul 24, 2026

chore: wrapping context support for Python 3.15 #17849

Merged

2 tasks

vlad-scherbich force-pushed the vlad/ddtracepy-315-profiling-asyncio-monitoring branch from 4b85b1d to 636fd80 Compare August 21, 2026 04:53

vlad-scherbich force-pushed the vlad/315-profiling-dev-tooling branch from e703ab0 to e95f62f Compare August 21, 2026 04:53

vlad-scherbich force-pushed the vlad/ddtracepy-315-profiling-asyncio-monitoring branch from 636fd80 to ba0a39e Compare August 21, 2026 17:43

vlad-scherbich force-pushed the vlad/315-profiling-dev-tooling branch 2 times, most recently from b906b1e to ba0e2bf Compare August 21, 2026 18:43

vlad-scherbich force-pushed the vlad/ddtracepy-315-profiling-asyncio-monitoring branch from ba0a39e to 082c37a Compare August 21, 2026 18:43

vlad-scherbich mentioned this pull request Aug 21, 2026

chore(py3.15): official support, SSI, and profiling reno #19254

Closed

2 tasks

vlad-scherbich force-pushed the vlad/ddtracepy-315-profiling-asyncio-monitoring branch from 082c37a to 6d9945a Compare August 28, 2026 00:45

vlad-scherbich force-pushed the vlad/315-profiling-dev-tooling branch from 50bf856 to f29e0ea Compare August 28, 2026 00:45

vlad-scherbich force-pushed the vlad/ddtracepy-315-profiling-asyncio-monitoring branch from 6d9945a to 5059048 Compare August 28, 2026 15:51

vlad-scherbich force-pushed the vlad/315-profiling-dev-tooling branch from f29e0ea to 8b78ec5 Compare August 28, 2026 15:51

vlad-scherbich changed the title ~~docs(profiling): py3.15 dev tooling and CPython upgrade runbook~~ docs(profiling-315): py3.15 dev tooling and CPython upgrade runbook Aug 28, 2026

vlad-scherbich requested a lite review from Copilot August 28, 2026 16:12

Copilot started reviewing on behalf of vlad-scherbich August 28, 2026 16:12 View session

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vlad-scherbich added 6 commits August 28, 2026 14:38

docs(profiling): add py3.15 dev tooling and CPython upgrade runbook

b0b9954

Profiling bring-up scripts, compatibility baselines, Echion migration runbook, and py315-stack PR navigation helpers (PR 12/14).

typing: annotate profiler compatibility script

35a4b41

typing: add type-annotate skill

4f966c5

docs(py315): document 6-PR profiling stack after consolidation

1ad6c8d

docs(py315): fix profiling stack tip SHAs after consolidation push

62b3efe

vlad-scherbich added 2 commits August 28, 2026 14:38

docs(py315): correct CPython version claims in runbook and PR bodies

cd4575a

Point the 3.15 runbook row at this stack instead of closed #17294/hasattr guards, and draft paste-ready PR bodies that do not treat sys.monitoring as a 3.15-only API.

docs(py315): rewrite profiling stack docs to the 5-PR chain

1c11f4f

Drop 6-PR / 14-PR numbering. Live stack is #19267 → #19269 → #19270 → #19272 → #19273. Leave #17849 and official-support / riot off this chain.

vlad-scherbich force-pushed the vlad/ddtracepy-315-profiling-asyncio-monitoring branch from 5059048 to 20c0559 Compare August 28, 2026 18:38

vlad-scherbich force-pushed the vlad/315-profiling-dev-tooling branch from 8b78ec5 to 1c11f4f Compare August 28, 2026 18:38

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docs(profiling-315): py3.15 dev tooling and CPython upgrade runbook - #19273

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		- Tagged int shift changed: `(i << 2)` instead of `(i << 2)` — same for non-debug,
		but `Py_TAGGED_SHIFT = 2` is now the canonical name.

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cit-pr-commenter-54b7da Bot commented Jul 24, 2026 •

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cit-pr-commenter-54b7da Bot commented Jul 24, 2026 •

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cit-pr-commenter-54b7da Bot commented Aug 21, 2026 •

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