[Perf] Linux/arm64: 1 Regression on 7/26/2023 2:29:36 PM #89942
Description
Run Information
| Name | Value |
|---|---|
| Architecture | arm64 |
| OS | ubuntu 20.04 |
| Queue | AmpereUbuntu |
| Baseline | 8aff8937fef4d5db8742a2710371aae366813c44 |
| Compare | 08acbb7ad7154e9d18227e4b00e4c9f41af1fffa |
| Diff | Diff |
| Configs | CompilationMode:tiered, RunKind:micro |
Regressions in System.Buffers.Tests.RentReturnArrayPoolTests<Object>
| Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio |
|---|---|---|---|---|---|---|---|---|
| 791.35 ns | 1.39 μs | 1.76 | 0.47 | False |
Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Buffers.Tests.RentReturnArrayPoolTests<Object>*'Payloads
System.Buffers.Tests.RentReturnArrayPoolTests<Object>.MultipleSerial(RentalSize: 4096, ManipulateArray: False, Async: False, UseSharedPool: True)
ETL Files
Histogram
Description of detection logic
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because we could not find enough baseline builds for window checking.
IsChangePoint: Marked as a change because one of 5/13/2023 2:36:22 AM, 7/26/2023 12:02:55 AM, 8/2/2023 4:26:52 PM falls between 7/24/2023 8:03:13 PM and 8/2/2023 4:26:52 PM.
IsRegressionStdDev: Marked as regression because -11.03408709080553 (T) = (0 -1178.2021374176456) / Math.Sqrt((358.2516346395195 / (4)) + (23889.189282422307 / (16))) is less than -2.100922040224263 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (4) + (16) - 2, .025) and -0.5938020060866738 = (739.2399638839286 - 1178.2021374176456) / 739.2399638839286 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.
JIT Disasms
Docs
Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository