dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 6 Regressions on 6/27/2026 8:54:05 AM +00:00

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arch-x64 branch-11.0 compilationmode-tiered kind-bepuphysics Look Again os-linux perf-regression runkind-bepuphysics runtime-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [fb43ff15847a6821ac4f3cb5b2581076124a06df](https://github.com/dotnet/sdk/commit/fb43ff15847a6821ac4f3cb5b2581076124a06df)
Compare | [e8cf72e05e4866224daa6b959d1f44a810dc0606](https://github.com/dotnet/sdk/commit/e8cf72e05e4866224daa6b959d1f44a810dc0606)
Diff | [Diff](https://github.com/dotnet/sdk/compare/fb43ff15847a6821ac4f3cb5b2581076124a06df...e8cf72e05e4866224daa6b959d1f44a810dc0606)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.TwoBodyConstraintBenchmarks

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [AngularSwivelHinge - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 44.06 μs | 58.58 μs | 1.33 | 0.00 | True | | |
|
  • [DistanceServo - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 82.91 μs | 99.03 μs | 1.19 | 0.00 | True | | |
|
  • [LinearAxisServo - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 86.51 μs | 95.47 μs | 1.10 | 0.00 | True | | |

![graph]()
![graph]()
![graph]()
[Test Report]()

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'DemoBenchmarks.TwoBodyConstraintBenchmarks*'
```

### DemoBenchmarks.TwoBodyConstraintBenchmarks.AngularSwivelHinge

#### ETL Files

#### Histogram

#### JIT Disasms

### DemoBenchmarks.TwoBodyConstraintBenchmarks.DistanceServo

#### ETL Files

#### Histogram

#### JIT Disasms

### DemoBenchmarks.TwoBodyConstraintBenchmarks.LinearAxisServo

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

---

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [fb43ff15847a6821ac4f3cb5b2581076124a06df](https://github.com/dotnet/sdk/commit/fb43ff15847a6821ac4f3cb5b2581076124a06df)
Compare | [e8cf72e05e4866224daa6b959d1f44a810dc0606](https://github.com/dotnet/sdk/commit/e8cf72e05e4866224daa6b959d1f44a810dc0606)
Diff | [Diff](https://github.com/dotnet/sdk/compare/fb43ff15847a6821ac4f3cb5b2581076124a06df...e8cf72e05e4866224daa6b959d1f44a810dc0606)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.ThreeBodyConstraintBenchmarks

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [AreaConstraint - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 81.75 μs | 95.06 μs | 1.16 | 0.00 | True | | |

![graph]()
[Test Report]()

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'DemoBenchmarks.ThreeBodyConstraintBenchmarks*'
```

### DemoBenchmarks.ThreeBodyConstraintBenchmarks.AreaConstraint

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

---

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [fb43ff15847a6821ac4f3cb5b2581076124a06df](https://github.com/dotnet/sdk/commit/fb43ff15847a6821ac4f3cb5b2581076124a06df)
Compare | [e8cf72e05e4866224daa6b959d1f44a810dc0606](https://github.com/dotnet/sdk/commit/e8cf72e05e4866224daa6b959d1f44a810dc0606)
Diff | [Diff](https://github.com/dotnet/sdk/compare/fb43ff15847a6821ac4f3cb5b2581076124a06df...e8cf72e05e4866224daa6b959d1f44a810dc0606)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.GatherScatterBenchmarks

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [GatherState - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 21.80 μs | 25.90 μs | 1.19 | 0.00 | True | | |

![graph]()
[Test Report]()

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'DemoBenchmarks.GatherScatterBenchmarks*'
```

### DemoBenchmarks.GatherScatterBenchmarks.GatherState

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

---

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [fb43ff15847a6821ac4f3cb5b2581076124a06df](https://github.com/dotnet/sdk/commit/fb43ff15847a6821ac4f3cb5b2581076124a06df)
Compare | [e8cf72e05e4866224daa6b959d1f44a810dc0606](https://github.com/dotnet/sdk/commit/e8cf72e05e4866224daa6b959d1f44a810dc0606)
Diff | [Diff](https://github.com/dotnet/sdk/compare/fb43ff15847a6821ac4f3cb5b2581076124a06df...e8cf72e05e4866224daa6b959d1f44a810dc0606)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.GroupedCollisionTesterBenchmarks

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

  • [CheapCollisionBenchmarks - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 22.33 μs | 24.59 μs | 1.10 | 0.00 | True | | |

![graph]()
[Test Report]()

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'DemoBenchmarks.GroupedCollisionTesterBenchmarks*'
```

### DemoBenchmarks.GroupedCollisionTesterBenchmarks.CheapCollisionBenchmarks

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

Contributor guide

No contributing guide indexed for this repository

Research direction

Start by running the listed benchmarks_ci.py command for the DemoBenchmarks.TwoBodyConstraintBenchmarks and ThreeBodyConstraintBenchmarks filters on Ubuntu 22.04. Compare the baseline and compare commits, then inspect the benchmark sources named in TwoBodyConstraintBenchmarks.cs, ThreeBodyConstraintBenchmarks.cs, and GatherScatterBenchmarks.cs; done means identifying and addressing the reported regressions and confirming the benchmark results.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp, linux, python
Domain
performance, testing
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
35/100

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