dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/arm64: 85 Regressions on 5/19/2026 5:33:16 PM +00:00

Open
#73,686 3 comments 0 reactions 0 assignees View on GitHub
arch-arm64 bdn-update branch-refs/heads/main compilationmode-tiered kind-micro os-linux perf-regression r2rtype-r2r_interpreter runkind-micro runtime-coreclr untriaged
Dominant language
No language data
Stars
10
Forks
8
PR metrics pending

Description

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [21d1570e075a895f62c292a5e1854947b97c7dbc](https://github.com/dotnet/runtime/commit/21d1570e075a895f62c292a5e1854947b97c7dbc)
Compare | [f397c835cc1c655505d2a22fd0cebb9e96733d0b](https://github.com/dotnet/runtime/commit/f397c835cc1c655505d2a22fd0cebb9e96733d0b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/21d1570e075a895f62c292a5e1854947b97c7dbc...f397c835cc1c655505d2a22fd0cebb9e96733d0b)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Regressions in System.IO.Tests.Perf_FileStream

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

  • [ReadAsync_NoBuffering - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 36.62 ms | 103.55 ms | 2.83 | 0.70 | False | | |
|
  • [ReadAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.13 ms | 3.14 ms | 2.77 | 0.77 | False | | |
|
  • [ReadAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 124.88 ms | 315.68 ms | 2.53 | 0.84 | False | | |
|
  • [ReadAsync_NoBuffering - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 391.57 ฮผs | 903.30 ฮผs | 2.31 | 0.74 | False | | |
|
  • [WriteAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 279.61 ms | 619.68 ms | 2.22 | 0.77 | False | | |
|
  • [ReadAsync_NoBuffering - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 43.38 ms | 95.21 ms | 2.19 | 0.75 | False | | |
|
  • [WriteAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 274.96 ms | 581.24 ms | 2.11 | 0.76 | False | | |
|
  • [WriteAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 5.60 ms | 11.64 ms | 2.08 | 0.70 | False | | |
|
  • [AppendAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.59 ms | 5.39 ms | 2.08 | 0.68 | False | | |
|
  • [ReadAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.54 ms | 5.02 ms | 1.97 | 0.76 | False | | |
|
  • [ReadAsync_NoBuffering - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 428.24 ฮผs | 802.09 ฮผs | 1.87 | 0.66 | False | | |
|
  • [ReadAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.97 ms | 5.54 ms | 1.87 | 0.82 | False | | |
|
  • [WriteAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 5.34 ms | 9.91 ms | 1.85 | 0.63 | False | | |
|
  • [FlushAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 8.76 ms | 15.77 ms | 1.80 | 0.78 | False | | |
|
  • [ReadAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 30.59 ฮผs | 54.05 ฮผs | 1.77 | 0.70 | False | | |
|
  • [ReadAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 31.37 ฮผs | 53.45 ฮผs | 1.70 | 0.72 | False | | |
|
  • [WriteAsync_NoBuffering_PreallocationSize - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 1.38 ms | 2.09 ms | 1.52 | 0.56 | False | | |
|
  • [WriteAsync_NoBuffering - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 210.69 ms | 314.96 ms | 1.49 | 0.83 | False | | |
|
  • [WriteAsync_NoBuffering_PreallocationSize - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 144.87 ms | 204.94 ms | 1.41 | 0.53 | False | | |
|
  • [ReadAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 97.68 ms | 128.39 ms | 1.31 | 0.84 | False | | |
|
  • [ReadAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.16 ms | 1.47 ms | 1.27 | 0.81 | False | | |
|
  • [WriteAsync_NoBuffering - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 2.19 ms | 2.64 ms | 1.20 | 0.62 | False | | |

![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Tests.Perf_FileStream*'
```

### System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize: 104857600, userBufferSize: 16384, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 4096, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 104857600, userBufferSize: 4096, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize: 1048576, userBufferSize: 16384, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.WriteAsync(fileSize: 104857600, userBufferSize: 4096, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize: 104857600, userBufferSize: 16384, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.WriteAsync(fileSize: 104857600, userBufferSize: 4096, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.WriteAsync(fileSize: 1048576, userBufferSize: 512, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.AppendAsync(fileSize: 1048576, userBufferSize: 4096, options: DeleteOnClose, Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 512, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync_NoBuffering(fileSize: 1048576, userBufferSize: 16384, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 512, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.WriteAsync(fileSize: 1048576, userBufferSize: 512, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.FlushAsync(fileSize: 1024, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1024, userBufferSize: 1024, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1024, userBufferSize: 1024, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.WriteAsync_NoBuffering_PreallocationSize(fileSize: 1048576, userBufferSize: 16384, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.WriteAsync_NoBuffering(fileSize: 104857600, userBufferSize: 16384, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.WriteAsync_NoBuffering_PreallocationSize(fileSize: 104857600, userBufferSize: 16384, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 104857600, userBufferSize: 4096, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 4096, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_FileStream.WriteAsync_NoBuffering(fileSize: 1048576, userBufferSize: 16384, options: Asynchronous)

#### 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 | [21d1570e075a895f62c292a5e1854947b97c7dbc](https://github.com/dotnet/runtime/commit/21d1570e075a895f62c292a5e1854947b97c7dbc)
Compare | [f397c835cc1c655505d2a22fd0cebb9e96733d0b](https://github.com/dotnet/runtime/commit/f397c835cc1c655505d2a22fd0cebb9e96733d0b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/21d1570e075a895f62c292a5e1854947b97c7dbc...f397c835cc1c655505d2a22fd0cebb9e96733d0b)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Regressions in System.IO.Tests.Perf_RandomAccess

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

  • [ReadAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 35.74 ms | 105.34 ms | 2.95 | 0.72 | False | | |
|
  • [ReadAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.02 ms | 2.37 ms | 2.32 | 0.75 | False | | |
|
  • [ReadAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 1.03 ms | 2.22 ms | 2.16 | 0.69 | False | | |
|
  • [ReadAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 36.52 ms | 78.04 ms | 2.14 | 0.70 | False | | |
|
  • [ReadScatterAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 854.35 ฮผs | 1536.98 ฮผs | 1.80 | 0.57 | False | | |
|
  • [ReadScatterAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 834.90 ฮผs | 1391.29 ฮผs | 1.67 | 0.56 | False | | |
|
  • [WriteAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 3.32 ms | 5.01 ms | 1.51 | 0.78 | False | | |
|
  • [ReadScatterAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 35.21 ms | 52.83 ms | 1.50 | 0.55 | False | | |
|
  • [WriteAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 217.13 ms | 307.82 ms | 1.42 | 0.74 | False | | |
|
  • [WriteAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 192.21 ms | 271.77 ms | 1.41 | 0.80 | False | | |
|
  • [ReadScatterAsync - Duration of single invocation]()
  • ๐Ÿ“ - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 36.24 ms | 47.68 ms | 1.32 | 0.50 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Tests.Perf_RandomAccess*'
```

### System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize: 104857600, bufferSize: 16384, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize: 1048576, bufferSize: 4096, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize: 1048576, bufferSize: 4096, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize: 104857600, bufferSize: 16384, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.ReadScatterAsync(fileSize: 1048576, buffersSize: 16384, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.ReadScatterAsync(fileSize: 1048576, buffersSize: 16384, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.WriteAsync(fileSize: 1048576, bufferSize: 4096, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.ReadScatterAsync(fileSize: 104857600, buffersSize: 65536, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.WriteAsync(fileSize: 104857600, bufferSize: 16384, options: None)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.WriteAsync(fileSize: 104857600, bufferSize: 16384, options: Asynchronous)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_RandomAccess.ReadScatterAsync(fileSize: 104857600, buffersSize: 65536, options: None)

#### 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

Assessment

This issue has not been assessed yet.

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.