Regressions in System.Net.Tests.Perf_WebUtility on arm64

[performanceautofiler]

Run Information

Name	Value
Architecture	arm64
OS	ubuntu 20.04
Queue	AmpereUbuntu
Baseline	7b651743dc951384f6c3d8455c88518022c7c3b9
Compare	b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Net.Tests.Perf_WebUtility

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Decode_NoDecodingRequired - Duration of single invocation	80.17 ns	87.66 ns	1.09	0.09	False

Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

Payloads

Baseline
Compare

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Net.Tests.Perf_WebUtility*'

Payloads

Baseline
Compare

Histogram

System.Net.Tests.Perf_WebUtility.Decode_NoDecodingRequired

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.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 87.65567056152061 > 84.72435361342947.
IsChangePoint: Marked as a change because one of 3/21/2023 2:53:21 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsRegressionStdDev: Marked as regression because -17.95135109670125 (T) = (0 -88.01258049891231) / Math.Sqrt((2.5000512794458047 / (33)) + (0.2977841763370414 / (4))) is less than -2.0301079282477414 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (33) + (4) - 2, .025) and -0.08583376758709343 = (81.05529881842888 - 88.01258049891231) / 81.05529881842888 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.

Docs

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

Run Information

Name	Value
Architecture	arm64
OS	ubuntu 20.04
Queue	AmpereUbuntu
Baseline	7b651743dc951384f6c3d8455c88518022c7c3b9
Compare	b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

[AndyAyersMS]

Regression in System.Net.Tests.Perf_WebUtility has persisted. However given its history we should wait a bit longer.

Implicated changes:

• Arm64: Combine if conditions into compare chains #79283
• JIT: Expand handling of non-value commas in gtSplitTree #83725
• Unroll Buffer.Memmove for constant lengths #83638

[AndyAyersMS]

Still looks like a real regression. Will transfer this one.

[ghost]

Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch, @kunalspathak
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Run Information

Name	Value
Architecture	arm64
OS	ubuntu 20.04
Queue	AmpereUbuntu
Baseline	7b651743dc951384f6c3d8455c88518022c7c3b9
Compare	b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Net.Tests.Perf_WebUtility

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Decode_NoDecodingRequired - Duration of single invocation	80.17 ns	87.66 ns	1.09	0.09	False

Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

Payloads

Baseline
Compare

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Net.Tests.Perf_WebUtility*'

Payloads

Baseline
Compare

Histogram

System.Net.Tests.Perf_WebUtility.Decode_NoDecodingRequired

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.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 87.65567056152061 > 84.72435361342947.
IsChangePoint: Marked as a change because one of 3/21/2023 2:53:21 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsRegressionStdDev: Marked as regression because -17.95135109670125 (T) = (0 -88.01258049891231) / Math.Sqrt((2.5000512794458047 / (33)) + (0.2977841763370414 / (4))) is less than -2.0301079282477414 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (33) + (4) - 2, .025) and -0.08583376758709343 = (81.05529881842888 - 88.01258049891231) / 81.05529881842888 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.

Docs

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

Run Information

Name	Value
Architecture	arm64
OS	ubuntu 20.04
Queue	AmpereUbuntu
Baseline	7b651743dc951384f6c3d8455c88518022c7c3b9
Compare	b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Globalization.Tests.StringSearch

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
LastIndexOf_Word_NotFound - Duration of single invocation	748.32 ns	979.60 ns	1.31	0.01	False

Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

Payloads

Baseline
Compare

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Globalization.Tests.StringSearch*'

Payloads

Baseline
Compare

Histogram

System.Globalization.Tests.StringSearch.LastIndexOf_Word_NotFound(Options: (en-US, OrdinalIgnoreCase, False))

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.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 979.602518921476 > 785.8155695440389.
IsChangePoint: Marked as a change because one of 2/14/2023 11:21:41 AM, 3/21/2023 2:53:21 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsRegressionStdDev: Marked as regression because -958.3367005850469 (T) = (0 -979.7357334161144) / Math.Sqrt((1.0575826002286106 / (33)) + (0.10078924251740952 / (4))) is less than -2.0301079282477414 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (33) + (4) - 2, .025) and -0.3055409898127936 = (750.4442534252428 - 979.7357334161144) / 750.4442534252428 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.

Docs

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

Author:	performanceautofiler[bot]
Assignees:	-
Labels:	arch-arm64, os-linux, area-CodeGen-coreclr, runtime-coreclr
Milestone:	-

[AndyAyersMS]

Fixed by enabling Dynamic PGO