[Perf] Linux/arm64: 2 Regressions on 10/14/2022 8:46:08 PM

[performanceautofiler]

Run Information

Architecture	arm64
OS	ubuntu 20.04
Baseline	8bc9a0748ea2e0b28041ac48100d266aacd27108
Compare	9567f277c65a51fe8c8cdad3a62bb884c40f8da7
Diff	Diff

Regressions in System.Collections.CopyTo<String>

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ImmutableArray - Duration of single invocation	369.30 ns	421.89 ns	1.14	0.27	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Collections.CopyTo<String>*'

Related Issues

Regressions

Improvements

Payloads

Baseline
Compare

Histogram

Edge Detector Info

Collection Data

System.Collections.CopyTo<String>.ImmutableArray(Size: 2048)

Description of detection logic

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.
IsRegressionWindowed: Marked as regression because 421.89389907633796 > 387.7763720858197.
IsChangePoint: Marked as a change because one of 9/22/2022 7:28:31 PM, 9/28/2022 11:19:50 AM, 10/3/2022 4:48:37 PM, 10/14/2022 9:06:25 AM, 10/19/2022 4:51:05 PM falls between 10/7/2022 4:12:34 PM and 10/19/2022 4:51:05 PM.
IsRegressionStdDev: Marked as regression because -10.523106326859041 (T) = (0 -422.90994432669225) / Math.Sqrt((344.8447395431847 / (23)) + (1.7053273438504897 / (15))) is less than -2.028094000977961 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (23) + (15) - 2, .025) and -0.10706769774675125 = (382.00910855537904 - 422.90994432669225) / 382.00910855537904 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.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

### Run Information

Architecture	arm64
OS	ubuntu 20.04
Baseline	8bc9a0748ea2e0b28041ac48100d266aacd27108
Compare	9567f277c65a51fe8c8cdad3a62bb884c40f8da7
Diff	Diff

Regressions in System.Threading.Tests.Perf_SpinLock

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
EnterExit - Duration of single invocation	14.34 ns	15.64 ns	1.09	0.26	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Threading.Tests.Perf_SpinLock*'

Related Issues

Regressions

Improvements

Payloads

Baseline
Compare

Histogram

Edge Detector Info

Collection Data

System.Threading.Tests.Perf_SpinLock.EnterExit

Description of detection logic

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.
IsRegressionWindowed: Marked as regression because 15.643929641539465 > 14.963711787090498.
IsChangePoint: Marked as a change because one of 10/2/2022 5:38:34 AM, 10/14/2022 9:06:25 AM, 10/19/2022 4:51:05 PM falls between 10/7/2022 4:12:34 PM and 10/19/2022 4:51:05 PM.
IsRegressionStdDev: Marked as regression because -13.956475831602821 (T) = (0 -15.948180012993795) / Math.Sqrt((0.0956600693755011 / (23)) + (0.09560877749750127 / (15))) is less than -2.028094000977961 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (23) + (15) - 2, .025) and -0.09867596337237007 = (14.515817715754048 - 15.948180012993795) / 14.515817715754048 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.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

[EgorBo]

Likely dotnet/runtime#76451