dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/arm64: 12 Improvements on 6/30/2026 7:21:17 PM +00:00

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arch-arm64 branch-refs/heads/main compilationmode-tiered kind-sve Look Again os-linux perf-improvement runkind-sve runtime-coreclr untriaged
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Description

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [dc6840e6978b3f0e3f2917b43f4b27a05f3cc984](https://github.com/dotnet/runtime/commit/dc6840e6978b3f0e3f2917b43f4b27a05f3cc984)
Compare | [01890b5bf452cfe1fea89cf3302b93a2950117ca](https://github.com/dotnet/runtime/commit/01890b5bf452cfe1fea89cf3302b93a2950117ca)
Diff | [Diff](https://github.com/dotnet/runtime/compare/dc6840e6978b3f0e3f2917b43f4b27a05f3cc984...01890b5bf452cfe1fea89cf3302b93a2950117ca)
Configs | CompilationMode:tiered, RunKind:sve

### Improvements in SveBenchmarks.MultiplyPow2

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

  • [SveTail - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 357.17 ns | 234.00 ns | 0.66 | 0.17 | False | | |
|
  • [SveTail - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 6.71 μs | 6.24 μs | 0.93 | 0.18 | False | | |
|
  • [SveTail - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 89.96 ns | 83.99 ns | 0.93 | 0.21 | False | | |
|
  • [SveMultiplyPow2 - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 7.67 μs | 7.19 μs | 0.94 | 0.20 | False | | |

![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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'SveBenchmarks.MultiplyPow2*'
```

### SveBenchmarks.MultiplyPow2.SveTail(Size: 527)

#### ETL Files

#### Histogram

#### JIT Disasms

### SveBenchmarks.MultiplyPow2.SveTail(Size: 10015)

#### ETL Files

#### Histogram

#### JIT Disasms

### SveBenchmarks.MultiplyPow2.SveTail(Size: 127)

#### ETL Files

#### Histogram

#### JIT Disasms

### SveBenchmarks.MultiplyPow2.SveMultiplyPow2(Size: 10015)

#### 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 | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [dc6840e6978b3f0e3f2917b43f4b27a05f3cc984](https://github.com/dotnet/runtime/commit/dc6840e6978b3f0e3f2917b43f4b27a05f3cc984)
Compare | [01890b5bf452cfe1fea89cf3302b93a2950117ca](https://github.com/dotnet/runtime/commit/01890b5bf452cfe1fea89cf3302b93a2950117ca)
Diff | [Diff](https://github.com/dotnet/runtime/compare/dc6840e6978b3f0e3f2917b43f4b27a05f3cc984...01890b5bf452cfe1fea89cf3302b93a2950117ca)
Configs | CompilationMode:tiered, RunKind:sve

### Improvements in SveBenchmarks.PairwiseAdd

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

  • [Sve2PairwiseAdd - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 289.13 ns | 236.86 ns | 0.82 | 0.26 | False | | |
|
  • [Sve2PairwiseAdd - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 5.40 μs | 4.43 μs | 0.82 | 0.21 | False | | |
|
  • [Sve2PairwiseAdd - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 74.45 ns | 62.01 ns | 0.83 | 0.25 | False | | |
|
  • [Sve2PairwiseAdd - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 14.31 ns | 13.12 ns | 0.92 | 0.26 | False | | |

![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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'SveBenchmarks.PairwiseAdd*'
```

### SveBenchmarks.PairwiseAdd.Sve2PairwiseAdd(Size: 527)

#### ETL Files

#### Histogram

#### JIT Disasms

### SveBenchmarks.PairwiseAdd.Sve2PairwiseAdd(Size: 10015)

#### ETL Files

#### Histogram

#### JIT Disasms

### SveBenchmarks.PairwiseAdd.Sve2PairwiseAdd(Size: 127)

#### ETL Files

#### Histogram

#### JIT Disasms

### SveBenchmarks.PairwiseAdd.Sve2PairwiseAdd(Size: 15)

#### 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 | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [dc6840e6978b3f0e3f2917b43f4b27a05f3cc984](https://github.com/dotnet/runtime/commit/dc6840e6978b3f0e3f2917b43f4b27a05f3cc984)
Compare | [01890b5bf452cfe1fea89cf3302b93a2950117ca](https://github.com/dotnet/runtime/commit/01890b5bf452cfe1fea89cf3302b93a2950117ca)
Diff | [Diff](https://github.com/dotnet/runtime/compare/dc6840e6978b3f0e3f2917b43f4b27a05f3cc984...01890b5bf452cfe1fea89cf3302b93a2950117ca)
Configs | CompilationMode:tiered, RunKind:sve

### Improvements in SveBenchmarks.FP64Overflow

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

  • [SveFP64Overflow - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 704.92 ns | 641.24 ns | 0.91 | 0.19 | False | | |
|
  • [SveFP64Overflow - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 174.08 ns | 158.56 ns | 0.91 | 0.24 | False | | |
|
  • [SveFP64Overflow - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 13.44 μs | 12.32 μs | 0.92 | 0.18 | False | | |
|
  • [SveFP64Overflow - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 24.43 ns | 22.52 ns | 0.92 | 0.26 | False | | |

![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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'SveBenchmarks.FP64Overflow*'
```

### SveBenchmarks.FP64Overflow.SveFP64Overflow(Size: 527)

#### ETL Files

#### Histogram

#### JIT Disasms

### SveBenchmarks.FP64Overflow.SveFP64Overflow(Size: 127)

#### ETL Files

#### Histogram

#### JIT Disasms

### SveBenchmarks.FP64Overflow.SveFP64Overflow(Size: 10015)

#### ETL Files

#### Histogram

#### JIT Disasms

### SveBenchmarks.FP64Overflow.SveFP64Overflow(Size: 15)

#### 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 with the benchmark sources src/benchmarks/micro/sve/MultiplyPow2.cs and PairwiseAdd.cs, then read the linked performance reports and benchmarking workflow documentation. Run scripts/benchmarks_ci.py with the provided SveBenchmarks.MultiplyPow2 filter on the specified arm64 configuration; the payload does not define a specific code change or completion criterion beyond investigating the reported improvements.

Written by the indexing model from the issue text.

Assessment

Tech stack
linux, python
Domain
performance
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
25/100

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