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System.Tests.GCExtendedTests.GetAllocatedBytesForCurrentThread - Allocated too much #74388

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System.Tests.GCExtendedTests.GetAllocatedBytesForCurrentThread - Allocated too much#74388
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cshung
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area-GC-coreclr
Milestone
Future

Description

@danmoseley
danmoseley
opened on Aug 22, 2022

Runfo in last 30 days as of 10/3

  • 5 occurrences - 1x Rolling run + 4x PR
  • As of 8/4 there was 1x Rolling run + 1x PR (it was too rare to file it back then)

Original Report

❌ System.Tests.GCExtendedTests.GetAllocatedBytesForCurrentThread(size: 1000)

Allocated too much: start: 84649544 end: 84749920 size: 1000
Expected: True
Actual:   False
Stack Trace
   at System.Tests.GCExtendedTests.GetAllocatedBytesForCurrentThread(Int32 size) in /_/src/libraries/System.Runtime/tests/System/GCTests.cs:line 798
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr) in /_/src/libraries/System.Private.CoreLib/src/System/Reflection/MethodInvoker.cs:line 64

Debian.10.Amd64.Open

Console log: 'System.Runtime.Tests' from job 8b265039-da4a-4577-9fe9-3ae7a32573d4 (ubuntu.1804.amd64.open.rt) using docker image mcr.microsoft.com/dotnet-buildtools/prereqs:debian-10-helix-amd64-20220810215022-f344011 on a002IZM

https://dev.azure.com/dnceng/public/_build/results?buildId=1959322&view=ms.vss-test-web.build-test-results-tab&runId=50341050&paneView=dotnet-dnceng.dnceng-build-release-tasks.helix-test-information-tab&resultId=185272

Activity

  2. ghost added
    untriagedNew issue has not been triaged by the area owner
    on Aug 22, 2022
  3. danmoseley
    added
    area-GC-coreclr
    on Aug 22, 2022
  5. mangod9
    removed
    untriagedNew issue has not been triaged by the area owner
    on Aug 23, 2022
  6. mangod9
    assigned
    cshung
    on Aug 23, 2022
  7. mangod9
    added this to the 7.0.0 milestone on Aug 23, 2022

  8. mangod9 commented on Aug 23, 2022

    @mangod9
    mangod9
    on Aug 23, 2022
    Member

    this seems to be a new failure, would be good to determine if some recent change might have affected this.

  9. danmoseley commented on Aug 23, 2022

    @danmoseley
    danmoseley
    on Aug 23, 2022
    ContributorAuthor

    There is some slop already in the text, so apparently it's not expected to be totally deterministic?

            Assert.True((end - start) < 5 * size, $"Allocated too much: start: {start} end: {end} size: {size}");

    So it would allocate 1K, allow up to 5K but it was 10K

  10. mangod9
    modified the milestones: 7.0.0, 8.0.0 on Sep 9, 2022
  11. karelz
    changed the title [-]Failure in System.Tests.GCExtendedTests.GetAllocatedBytesForCurrentThread on Debian 10[/-] [+]System.Tests.GCExtendedTests.GetAllocatedBytesForCurrentThread - Allocated too much[/+] on Oct 3, 2022

  12. karelz commented on Oct 3, 2022

    @karelz
    karelz
    on Oct 3, 2022
    Member

    Happens on all platforms. Roughly 1x per week - see top post updated

  13. mangod9
    modified the milestones: 8.0.0, Future on Aug 2, 2023
  14. agocke
    added this to AppModelon Sep 23, 2025

  15. janvorli commented on Jul 9, 2026

    @janvorli
    janvorli
    on Jul 9, 2026
    Member

    This doesn't seem to happen anymore and the issue is ancient. Closing

  16. janvorli
    closed this as completedon Jul 9, 2026
  17. github-actions
    locked and limited conversation to collaborators on Aug 9, 2026
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