dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 25 Regressions on 8/3/2026 7:26:34 AM +00:00

Open
#77,704 1 comment 0 reactions 0 assignees View on GitHub
arch-wasm arch-x64 branch-refs/heads/main compilationmode-wasm kind-micro Look Again os-linux perf-regression runkind-micro untriaged
Dominant language
No language data
Stars
10
Forks
8
PR metrics pending

Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [79efd2de59f086171fd811d7375241616c43b890](https://github.com/dotnet/runtime/commit/79efd2de59f086171fd811d7375241616c43b890)
Compare | [c4fc2a5afc5644e10973054b1aa63c27a1584404](https://github.com/dotnet/runtime/commit/c4fc2a5afc5644e10973054b1aa63c27a1584404)
Diff | [Diff](https://github.com/dotnet/runtime/compare/79efd2de59f086171fd811d7375241616c43b890...c4fc2a5afc5644e10973054b1aa63c27a1584404)
Configs | CompilationMode:wasm, RunKind:micro

### Regressions in System.MathBenchmarks.Double

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

  • [Acos - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 68.26 μs | 110.63 μs | 1.62 | 0.12 | False | | |
|
  • [Exp - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 43.64 μs | 70.71 μs | 1.62 | 0.12 | False | | |
|
  • [Atan - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 61.54 μs | 98.20 μs | 1.60 | 0.11 | False | | |
|
  • [Asinh - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 82.53 μs | 130.73 μs | 1.58 | 0.06 | False | | |
|
  • [Pow - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 90.28 μs | 142.01 μs | 1.57 | 0.06 | False | | |
|
  • [Cbrt - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 57.89 μs | 84.14 μs | 1.45 | 0.01 | False | | |
|
  • [Log10P1 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 105.59 μs | 149.88 μs | 1.42 | 0.34 | False | | |
|
  • [Atan2 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 90.88 μs | 117.09 μs | 1.29 | 0.11 | False | | |
|
  • [Exp10 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 90.15 μs | 115.17 μs | 1.28 | 0.09 | False | | |
|
  • [Exp2 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 93.59 μs | 117.85 μs | 1.26 | 0.11 | False | | |
|
  • [AtanPi - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 73.98 μs | 89.77 μs | 1.21 | 0.20 | False | | |
|
  • [Sin - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 46.45 μs | 53.02 μs | 1.14 | 0.11 | False | | |
|
  • [Log2 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 43.20 μs | 47.40 μs | 1.10 | 0.06 | False | | |

![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![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 'System.MathBenchmarks.Double*'
```

### System.MathBenchmarks.Double.Acos

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Exp

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Atan

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Asinh

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Pow

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Cbrt

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Log10P1

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Atan2

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Exp10

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Exp2

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.AtanPi

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Sin

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Log2

#### 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 | [79efd2de59f086171fd811d7375241616c43b890](https://github.com/dotnet/runtime/commit/79efd2de59f086171fd811d7375241616c43b890)
Compare | [c4fc2a5afc5644e10973054b1aa63c27a1584404](https://github.com/dotnet/runtime/commit/c4fc2a5afc5644e10973054b1aa63c27a1584404)
Diff | [Diff](https://github.com/dotnet/runtime/compare/79efd2de59f086171fd811d7375241616c43b890...c4fc2a5afc5644e10973054b1aa63c27a1584404)
Configs | CompilationMode:wasm, RunKind:micro

### Regressions in System.MathBenchmarks.Single

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

  • [Exp - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 36.53 μs | 72.64 μs | 1.99 | 0.09 | False | | |
|
  • [Log - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 41.24 μs | 80.33 μs | 1.95 | 0.02 | False | | |
|
  • [LogP1 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 57.60 μs | 98.68 μs | 1.71 | 0.39 | False | | |
|
  • [Exp10 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 54.54 μs | 86.95 μs | 1.59 | 0.04 | False | | |
|
  • [Exp10M1 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 65.25 μs | 103.99 μs | 1.59 | 0.08 | False | | |
|
  • [Atanh - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 65.98 μs | 102.93 μs | 1.56 | 0.02 | False | | |
|
  • [Atan2 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 74.25 μs | 109.81 μs | 1.48 | 0.11 | False | | |
|
  • [Cos - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 38.23 μs | 54.27 μs | 1.42 | 0.22 | False | | |
|
  • [Exp2 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 56.74 μs | 75.29 μs | 1.33 | 0.08 | False | | |
|
  • [Pow - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 66.19 μs | 76.09 μs | 1.15 | 0.09 | False | | |
|
  • [AcosPi - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 55.55 μs | 62.25 μs | 1.12 | 0.04 | False | | |

![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![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 'System.MathBenchmarks.Single*'
```

### System.MathBenchmarks.Single.Exp

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Log

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.LogP1

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Exp10

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Exp10M1

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Atanh

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Atan2

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Cos

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Exp2

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Pow

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.AcosPi

#### 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 | [79efd2de59f086171fd811d7375241616c43b890](https://github.com/dotnet/runtime/commit/79efd2de59f086171fd811d7375241616c43b890)
Compare | [c4fc2a5afc5644e10973054b1aa63c27a1584404](https://github.com/dotnet/runtime/commit/c4fc2a5afc5644e10973054b1aa63c27a1584404)
Diff | [Diff](https://github.com/dotnet/runtime/compare/79efd2de59f086171fd811d7375241616c43b890...c4fc2a5afc5644e10973054b1aa63c27a1584404)
Configs | CompilationMode:wasm, RunKind:micro

### Regressions in System.Numerics.Tests.Perf_Matrix4x4

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

  • [InequalityOperatorBenchmark - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 175.61 ns | 189.13 ns | 1.08 | 0.04 | False | | |

![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 'System.Numerics.Tests.Perf_Matrix4x4*'
```

### System.Numerics.Tests.Perf_Matrix4x4.InequalityOperatorBenchmark

#### 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 comparing the baseline commit 79efd2de59f086171fd811d7375241616c43b890 with compare commit c4fc2a5afc5644e10973054b1aa63c27a1584404, then inspect the listed benchmark sources such as src/benchmarks/micro/runtime/Math/Functions/Double/Acos.cs. Reproduce the wasm microbenchmark regressions using the linked reports; done means identifying and addressing the regression across the affected System.MathBenchmarks.Double tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
wasm
Domain
performance
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
38/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.