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Enable ILLink caching and post-build purging in CI - #135067
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Tagging subscribers to this area: @agocke, @dotnet/illink |
sbomer
added this pull request to stack #135070
October 1, 2026 22:43
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Cache eligible whole-task invocations with environment-only opt-in and explicit timestamp-based purging. Bypass caching for extra arguments; runtime-specific argument support is deferred to the next layer. Assisted-by: Copilot:gpt-6-astra Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 561d1c87-e14b-46f8-be7f-a08f544ec537
Assisted-by: Copilot:gpt-6-astra Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 561d1c87-e14b-46f8-be7f-a08f544ec537
Assisted-by: Copilot:gpt-6-astra Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 561d1c87-e14b-46f8-be7f-a08f544ec537
Replace the write-to-temp + File.Replace + retry approach with a plain overwrite. File.Replace's ReplaceFile API isn't meant for concurrent writers to the same destination, which caused a transient Windows CI failure. A plain File.WriteAllText is safe here: FileShare.Read makes the OS serialize conflicting writers, so a losing writer's open fails before touching the file. The marker is advisory bookkeeping, and CachePurge.cs already tolerates malformed content per entry. Assisted-by: Claude:claude-sonnet-5 (GitHub Copilot CLI) Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 561d1c87-e14b-46f8-be7f-a08f544ec537
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Keep purge usable if a best-effort last-used refresh leaves an invalid marker. Report the fallback while preserving errors for actual maintenance failures. Assisted-by: GitHub Copilot CLI:gpt-6-sol Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 561d1c87-e14b-46f8-be7f-a08f544ec537
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sbomer
removed request for
BrzVlad,
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October 19, 2026 18:42
Update the lower stack layer before propagating main to the dependent CI cache PR. Assisted-by: Copilot:gpt-6.1-sol Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 561d1c87-e14b-46f8-be7f-a08f544ec537
Preserve both Roslyn and ILLink final-job purge hooks after updating the stack bottom-up from main. Assisted-by: Copilot:gpt-6.1-sol Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 561d1c87-e14b-46f8-be7f-a08f544ec537
agocke
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Oct 19, 2026
agocke
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Oct 19, 2026
Assisted-by: Copilot:gpt-6.1-sol Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 561d1c87-e14b-46f8-be7f-a08f544ec537
Assisted-by: Copilot:gpt-6.1-sol Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 561d1c87-e14b-46f8-be7f-a08f544ec537
agocke
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Oct 20, 2026
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/ba-g "Unrelated failures: #136096" |
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Enable experimental ILLink task caching in the Linux x64, Windows x64, and macOS arm64 CoreLib/libraries jobs. Restore a job-private cache from Azure Pipelines, with snapshots separated by platform and configuration. After all build and post-build steps finish, purge entries unused by the current build before saving the next snapshot.
In CI build 1642482, linker cache hits were 254/255 on Linux and macOS (99.6%) and 252/255 on Windows (98.8%). Restore, reuse, purge, and snapshot saving succeeded on all three platforms.