[Perf] Linux/arm64: 1 Regression on 7/1/2023 1:53:48 AM

[performanceautofiler[bot]]

Run Information

Name	Value
Architecture	arm64
OS	ubuntu 20.04
Queue	AmpereUbuntu
Baseline	cdd7566751185d8330b1229b5b7aeb64605fbbf2
Compare	1db4357891752cc028620710fe924425235b8f89
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Tests.Perf_Guid

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
[ParseExactD - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Tests.Perf_Guid.ParseExactD.html>)	32.53 ns	38.30 ns	1.18	0.01	False

Test Report

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.Tests.Perf_Guid*'

### Payloads [Baseline]() [Compare]() ### System.Tests.Perf_Guid.ParseExactD #### ETL Files #### Histogram ```log ``` #### 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 38.29875498727696 > 35.29147334230923. IsChangePoint: Marked as a change because one of 4/25/2023 6:46:56 PM, 5/26/2023 9:55:14 AM, 6/8/2023 5:31:08 AM, 6/30/2023 4:39:46 PM, 7/5/2023 5:05:14 PM falls between 6/27/2023 3:42:18 AM and 7/5/2023 5:05:14 PM. IsRegressionStdDev: Marked as regression because -17.38666518722804 (T) = (0 -37.788261466094106) / Math.Sqrt((0.13515280497933502 / (14)) + (0.4713688146288226 / (9))) is less than -2.079613844716807 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (14) + (9) - 2, .025) and -0.1294225723900663 = (33.45803633632643 - 37.788261466094106) / 33.45803633632643 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](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)

[EgorBo]

https://github.com/dotnet/runtime/pull/88267 cc @EgorBo

[DrewScoggins]

Did this ever get followed up on? We are still seeing the regression?