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@dependabot dependabot bot commented on behalf of github Aug 8, 2025

Updated Microsoft.NET.ILLink.Tasks from 9.0.7 to 9.0.8.

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9.0.8

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Full Changelog: dotnet/runtime@v9.0.7...v9.0.8

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Updated Microsoft.VisualStudio.Threading.Analyzers from 17.8.14 to 17.14.15.

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17.14.15

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Full Changelog: microsoft/vs-threading@v17.13.2...v17.14.15

17.14.2-alpha

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17.13.61

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17.13.2

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17.12.19

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Full Changelog: microsoft/vs-threading@v17.11.20...v17.12.19

17.11.20

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17.11.19-preview

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Full Changelog: microsoft/vs-threading@v17.10.48...v17.11.19-preview

17.10.48

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17.10.12-preview

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17.9.28

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17.9.1-alpha

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…ading.Analyzers

Bumps Microsoft.NET.ILLink.Tasks to 9.0.8
Bumps Microsoft.VisualStudio.Threading.Analyzers from 17.8.14 to 17.14.15

---
updated-dependencies:
- dependency-name: Microsoft.NET.ILLink.Tasks
  dependency-version: 9.0.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: microsoft
- dependency-name: Microsoft.NET.ILLink.Tasks
  dependency-version: 9.0.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: microsoft
- dependency-name: Microsoft.NET.ILLink.Tasks
  dependency-version: 9.0.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: microsoft
- dependency-name: Microsoft.NET.ILLink.Tasks
  dependency-version: 9.0.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: microsoft
- dependency-name: Microsoft.VisualStudio.Threading.Analyzers
  dependency-version: 17.14.15
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: microsoft
...

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dependabot bot commented on behalf of github Aug 8, 2025

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dependabot bot commented on behalf of github Aug 8, 2025

The reviewers field in the dependabot.yml file will be removed soon. Please use the code owners file to specify reviewers for Dependabot PRs. For more information, see this blog post.

@dependabot dependabot bot requested a review from mivertowski August 8, 2025 16:16
@mivertowski mivertowski merged commit 2e01fbd into main Aug 8, 2025
15 of 41 checks passed
@mivertowski mivertowski deleted the dependabot/nuget/plugins/backends/DotCompute.Backends.CPU/microsoft-decb2ffff1 branch August 8, 2025 19:37
mivertowski added a commit that referenced this pull request Nov 24, 2025
… crashes

Two critical issues discovered during Metal backend validation:

1. MPS Performance Test (Claim #2) - Disposal Crash:
   - Segfault (SIGSEGV) occurs after MetalMPSOrchestrator.Dispose()
   - Crash happens during resource cleanup phase
   - Root cause: Likely improper Metal device/resource lifecycle management
   - Impact: Cannot validate MPS 3-4x performance claim

2. Graph Execution Test (Claim #7) - Thread-Safety Crash:
   - Segfault (SIGSEGV) when executing multiple kernels in parallel
   - Crash at invalid memory address: 0x000002f93b6ef800
   - Root cause: Thread-safety issues in Metal backend
     * Command buffer acquisition not thread-safe
     * Binary archive cache access race condition
     * Metal device concurrent access issues
   - Impact: Cannot validate >1.5x parallel speedup claim

Validation Results (3/4 passing):
✅ Claim #5: Kernel Cache - 3.775 μs (target < 1000 μs)
✅ Claim #6a: Command Buffer - 0.27 μs (target < 100 μs)
✅ Claim #4: Cold Start - 7.84 ms (target < 10 ms)
❌ Claim #1: Unified Memory - 1.88x (target 2-3x) - Close!
⚠️  Claim #2: MPS Performance - SKIPPED (disposal crash)
⚠️  Claim #7: Graph Execution - SKIPPED (thread-safety crash)

Next Steps:
- Investigate MetalMPSOrchestrator disposal/cleanup
- Add thread-safety to Metal backend critical sections
- Consider adding locks around: device access, command buffers, binary archives
- Test parallel kernel execution with proper synchronization

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>
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