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Lock-free scheduler with per-priority queues - #193

Merged

TrentHouliston merged 50 commits into

mainfrom

houliston/scheduler

Jun 17, 2026

Merged

Lock-free scheduler with per-priority queues#193
TrentHouliston merged 50 commits into
mainfrom
houliston/scheduler

Commits on May 27, 2026
- Lock-free scheduler with per-priority queues and pre-existing TSAN race fixes
  
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  3f052ee
- Formatting
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  c03ffd2
- Replace atomic shared_ptr cache with atomic raw pointer; fix clang-tidy
  
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  3d2ebfd
Commits on May 28, 2026
- Address Copilot review: leak fix + group drain + doc cleanup
  
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  1268385
- Merge branch 'main' into houliston/scheduler
  TrentHouliston
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  64b9879
Commits on Jun 3, 2026
- Fix idle epoch lost when a Sync waiter is parked off-pool
  
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  9159be4
Commits on Jun 15, 2026
- Give UDP test the same CI timeout budget as TCP
  
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  105cefe
- Address SonarCloud PR 193 issues: code fixes and scoped suppressions
  
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  84da938
- Address Copilot review: queue dtor leaks, block reclaim race, force-stop, benchmark gating
  
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  3244882
- Fix group token leak when opportunistic drain races park publish.
  
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  aa8b9a2
- Make group token handback accounting exact and add contention stress test
  
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  5f74b95
Commits on Jun 16, 2026
- Fix clang-tidy findings in scheduler headers.
  
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  fb14e22
- Remove unused Semaphore and fix pending_tasks publish ordering
  
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  28a0ad9
- Fix force-stop deadlock hazard and scope test API define
  
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  04de2ed
- Fix clang-tidy diagnostics in threading unit tests.
  
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  e032424
- Fix SonarCloud findings in pool teardown and scheduler dtor.
  
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  31377e2
- Improve scheduler new-code coverage via deletion and BDD tests.
  
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  054d399
- Fix CI failures in scheduler tests and multicast probing.
  
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  4fb157a
- Extract shared queue BDD helpers to cut SonarCloud duplication.
  
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  307691f
- Adopt PR #190 multicast round-trip probe for UDP CI stability.
  
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  da737ff
- Consolidate shared queue tests into templated Catch2 cases.
  
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  42d386a
- Extract shared lock-free block helpers to cut SonarCloud duplication.
  
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  aecf5c0
- Delegate MPSC force-stop drain to the consumer thread.
  
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  1708045
- Fix MPSC force-stop hangs after the consumer thread exits.
  
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  d500e32
- Apply PR review queue cleanups for docs, BLOCK_SIZE, and test constants.
  
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  5735023
- Type Reaction scheduler cache as atomic Pool* for type safety.
  
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  eb13426
- Replace Pool external-waiter register/unregister with RAII handle.
  
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  e92f9bb
- Document why Catch2 BENCHMARK was not adopted for emit ping-pong matrix.
  
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  d5fdd39
- Introduce PriorityLevel enum for scheduler bucket mapping.
  
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  b78ea74
- Close IOController wake-then-lock race with wake_requested handoff.
  
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  1e8a509
- Drop PR #190 UDP CI workarounds; rely on multicast probe.
  
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  15ee1ea
- Spike: document TaskQueue wait-freedom and tighten spin back-off
  
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  a7b63ea
- Define BUILD_TESTS before add_subdirectory(src).
  
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  a550cad
- Fix clang-tidy forward-ref warning in spin_until.
  
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  94c3ac2
- Format taskqueue wait-free assessment for mdformat.
  
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  a35eca3
- Fix CI: PriorityLevel enum size and UDP timeout scaling.
  
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  030a98a
- Restore 20s UDP timeout budget on Windows CI.
  
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  db584f1
- Give Windows UDP matrix 25s CI timeout headroom.
  
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  166a903
- Allow UDP matrix to finish and shut down on Windows CI.
  
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  31962a2
- Extend UDP CI timeout for Windows shutdown pipeline.
  
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  3568c44
- Restore Windows CI UDP skip; IOController path still flaky on GHA.
  
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  fe9fdba
Commits on Jun 17, 2026
- Add explanation docs for the lock-free scheduler.
  
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  42a7953
- Fix mdformat violations in scheduler docs.
  
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  c33d48b
- Remove R&D spike docs from houliston/scheduler branch.
  
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  3b3ca4b
- Refactor IO notifier wake_requested to RAII guards.
  
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  b7534f6
- Revert queue spin backoff to std::this_thread::yield().
  
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  c49d925
- Fix clang-tidy on NotifierWakeGuard RAII helpers.
  
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  dff42d6
- Remove NUCLEAR_GROUP_TEST_API hooks from Group production code.
  
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  4591e31
- Address latest Copilot review on PR #193.
  
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  c53c2a9
- Fix clang-tidy include-cleaner in Group test
  
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  5612b90

Commits

Commits on May 27, 2026

Commits on May 28, 2026

Commits on Jun 3, 2026

Commits on Jun 15, 2026

Commits on Jun 16, 2026

Commits on Jun 17, 2026