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Avoid incrementing bg process utime/stime counters by negative durations #14323
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squahtx
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Oct 31, 2022
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LGTM!
It feels like we may be papering over a bug here, but there's not enough information to tell.
I'd be interested in finding out what ru_stime/ru_utime are in new_stats and _reported_stats when things go wrong. But I think this isn't worth spending a huge amount of time on, so let's merge the fix and move on (unless you're keen on logging a warning with that info for debugging.)
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Thanks! Looks like I need to fix up the olddeps test job though. |
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Synapse 1.71.0 (2022-11-08) =========================== Please note that, as announced in the release notes for Synapse 1.69.0, legacy Prometheus metric names are now disabled by default. They will be removed altogether in Synapse 1.73.0. If not already done, server administrators should update their dashboards and alerting rules to avoid using the deprecated metric names. See the [upgrade notes](https://matrix-org.github.io/synapse/v1.71/upgrade.html#upgrading-to-v1710) for more details. **Note:** in line with our [deprecation policy](https://matrix-org.github.io/synapse/latest/deprecation_policy.html) for platform dependencies, this will be the last release to support PostgreSQL 10, which reaches upstream end-of-life on November 10th, 2022. Future releases of Synapse will require PostgreSQL 11+. No significant changes since 1.71.0rc2. Synapse 1.71.0rc2 (2022-11-04) ============================== Improved Documentation ---------------------- - Document the changes to monthly active user metrics due to deprecation of legacy Prometheus metric names. ([\matrix-org#14358](matrix-org#14358), [\matrix-org#14360](matrix-org#14360)) Deprecations and Removals ------------------------- - Disable legacy Prometheus metric names by default. They can still be re-enabled for now, but they will be removed altogether in Synapse 1.73.0. ([\matrix-org#14353](matrix-org#14353)) Internal Changes ---------------- - Run unit tests against Python 3.11. ([\matrix-org#13812](matrix-org#13812)) Synapse 1.71.0rc1 (2022-11-01) ============================== Features -------- - Support back-channel logouts from OpenID Connect providers. ([\matrix-org#11414](matrix-org#11414)) - Allow use of Postgres and SQLlite full-text search operators in search queries. ([\matrix-org#11635](matrix-org#11635), [\matrix-org#14310](matrix-org#14310), [\matrix-org#14311](matrix-org#14311)) - Implement [MSC3664](matrix-org/matrix-spec-proposals#3664), Pushrules for relations. Contributed by Nico. ([\matrix-org#11804](matrix-org#11804)) - Improve aesthetics of HTML templates. Note that these changes do not retroactively apply to templates which have been [customised](https://matrix-org.github.io/synapse/latest/templates.html#templates) by server admins. ([\matrix-org#13652](matrix-org#13652)) - Enable write-ahead logging for SQLite installations. Contributed by [@asymmetric](https://github.com/asymmetric). ([\matrix-org#13897](matrix-org#13897)) - Show erasure status when [listing users](https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#query-user-account) in the Admin API. ([\matrix-org#14205](matrix-org#14205)) - Provide a specific error code when a `/sync` request provides a filter which doesn't represent a JSON object. ([\matrix-org#14262](matrix-org#14262)) Bugfixes -------- - Fix a long-standing bug where the `update_synapse_database` script could not be run with multiple databases. Contributed by @thefinn93 @ Beeper. ([\matrix-org#13422](matrix-org#13422)) - Fix a bug which prevented setting an avatar on homeservers which have an explicit port in their `server_name` and have `max_avatar_size` and/or `allowed_avatar_mimetypes` configuration. Contributed by @ashfame. ([\matrix-org#13927](matrix-org#13927)) - Check appservice user interest against the local users instead of all users in the room to align with [MSC3905](matrix-org/matrix-spec-proposals#3905). ([\matrix-org#13958](matrix-org#13958)) - Fix a long-standing bug where Synapse would accidentally include extra information in the response to [`PUT /_matrix/federation/v2/invite/{roomId}/{eventId}`](https://spec.matrix.org/v1.4/server-server-api/#put_matrixfederationv2inviteroomideventid). ([\matrix-org#14064](matrix-org#14064)) - Fix a bug introduced in Synapse 1.64.0 where presence updates could be missing from `/sync` responses. ([\matrix-org#14243](matrix-org#14243)) - Fix a bug introduced in Synapse 1.60.0 which caused an error to be logged when Synapse received a SIGHUP signal if debug logging was enabled. ([\matrix-org#14258](matrix-org#14258)) - Prevent history insertion ([MSC2716](matrix-org/matrix-spec-proposals#2716)) during an partial join ([MSC3706](matrix-org/matrix-spec-proposals#3706)). ([\matrix-org#14291](matrix-org#14291)) - Fix a bug introduced in Synapse 1.34.0 where device names would be returned via a federation user key query request when `allow_device_name_lookup_over_federation` was set to `false`. ([\matrix-org#14304](matrix-org#14304)) - Fix a bug introduced in Synapse 0.34.0 where logs could include error spam when background processes are measured as taking a negative amount of time. ([\matrix-org#14323](matrix-org#14323)) - Fix a bug introduced in Synapse 1.70.0 where clients were unable to PUT new [dehydrated devices](matrix-org/matrix-spec-proposals#2697). ([\matrix-org#14336](matrix-org#14336)) Improved Documentation ---------------------- - Explain how to disable the use of [`trusted_key_servers`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#trusted_key_servers). ([\matrix-org#13999](matrix-org#13999)) - Add workers settings to [configuration manual](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#individual-worker-configuration). ([\matrix-org#14086](matrix-org#14086)) - Correct the name of the config option [`encryption_enabled_by_default_for_room_type`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#encryption_enabled_by_default_for_room_type). ([\matrix-org#14110](matrix-org#14110)) - Update docstrings of `SynapseError` and `FederationError` to bettter describe what they are used for and the effects of using them are. ([\matrix-org#14191](matrix-org#14191)) Internal Changes ---------------- - Remove unused `@lru_cache` decorator. ([\matrix-org#13595](matrix-org#13595)) - Save login tokens in database and prevent login token reuse. ([\matrix-org#13844](matrix-org#13844)) - Refactor OIDC tests to better mimic an actual OIDC provider. ([\matrix-org#13910](matrix-org#13910)) - Fix type annotation causing import time error in the Complement forking launcher. ([\matrix-org#14084](matrix-org#14084)) - Refactor [MSC3030](matrix-org/matrix-spec-proposals#3030) `/timestamp_to_event` endpoint to loop over federation destinations with standard pattern and error handling. ([\matrix-org#14096](matrix-org#14096)) - Add initial power level event to batch of bulk persisted events when creating a new room. ([\matrix-org#14228](matrix-org#14228)) - Refactor `/key/` endpoints to use `RestServlet` classes. ([\matrix-org#14229](matrix-org#14229)) - Switch to using the `matrix-org/backend-meta` version of `triage-incoming` for new issues in CI. ([\matrix-org#14230](matrix-org#14230)) - Build wheels on macos 11, not 10.15. ([\matrix-org#14249](matrix-org#14249)) - Add debugging to help diagnose lost device list updates. ([\matrix-org#14268](matrix-org#14268)) - Add Rust cache to CI for `trial` runs. ([\matrix-org#14287](matrix-org#14287)) - Improve type hinting of `RawHeaders`. ([\matrix-org#14303](matrix-org#14303)) - Use Poetry 1.2.0 in the Twisted Trunk CI job. ([\matrix-org#14305](matrix-org#14305)) <details> <summary>Dependency updates</summary> Runtime: - Bump anyhow from 1.0.65 to 1.0.66. ([\matrix-org#14278](matrix-org#14278)) - Bump jinja2 from 3.0.3 to 3.1.2. ([\matrix-org#14271](matrix-org#14271)) - Bump prometheus-client from 0.14.0 to 0.15.0. ([\matrix-org#14274](matrix-org#14274)) - Bump psycopg2 from 2.9.4 to 2.9.5. ([\matrix-org#14331](matrix-org#14331)) - Bump pysaml2 from 7.1.2 to 7.2.1. ([\matrix-org#14270](matrix-org#14270)) - Bump sentry-sdk from 1.5.11 to 1.10.1. ([\matrix-org#14330](matrix-org#14330)) - Bump serde from 1.0.145 to 1.0.147. ([\matrix-org#14277](matrix-org#14277)) - Bump serde_json from 1.0.86 to 1.0.87. ([\matrix-org#14279](matrix-org#14279)) Tooling and CI: - Bump black from 22.3.0 to 22.10.0. ([\matrix-org#14328](matrix-org#14328)) - Bump flake8-bugbear from 21.3.2 to 22.9.23. ([\matrix-org#14042](matrix-org#14042)) - Bump peaceiris/actions-gh-pages from 3.8.0 to 3.9.0. ([\matrix-org#14276](matrix-org#14276)) - Bump peaceiris/actions-mdbook from 1.1.14 to 1.2.0. ([\matrix-org#14275](matrix-org#14275)) - Bump setuptools-rust from 1.5.1 to 1.5.2. ([\matrix-org#14273](matrix-org#14273)) - Bump twine from 3.8.0 to 4.0.1. ([\matrix-org#14332](matrix-org#14332)) - Bump types-opentracing from 2.4.7 to 2.4.10. ([\matrix-org#14133](matrix-org#14133)) - Bump types-requests from 2.28.11 to 2.28.11.2. ([\matrix-org#14272](matrix-org#14272)) </details>
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Fixes #14322---see that issue for context. Added in #3553.
I don't understand why we get the negative timestamps (see speculation here). Take the approach we have elsewhere of clamping to 0 upwards, as in #4061.