[Perf] Linux/arm64: 1 Regression on 7/26/2023 2:29:36 PM

[performanceautofiler]

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
MultipleSerial - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	791.35 ns	1.39 μs	1.76	0.47	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.Buffers.Tests.RentReturnArrayPoolTests<Object>*'

Payloads

Baseline
Compare

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

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Benchmarking workflow for dotnet/runtime repository

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Tagging subscribers to this area: @dotnet/area-system-buffers
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Issue Details

---

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
MultipleSerial - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	791.35 ns	1.39 μs	1.76	0.47	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.Buffers.Tests.RentReturnArrayPoolTests<Object>*'

Payloads

Baseline
Compare

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

Author:	performanceautofiler[bot]
Assignees:	-
Labels:	arch-arm64, area-System.Buffers, os-linux, untriaged, runtime-coreclr
Milestone:	-

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Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
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	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
MultipleSerial - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	791.35 ns	1.39 μs	1.76	0.47	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.Buffers.Tests.RentReturnArrayPoolTests<Object>*'

Payloads

Baseline
Compare

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

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

[EgorBo]

#87847

[EgorBo]

It's the only regression from that change and we've got many improvements (#87847 (comment)) so I am moving this to 9.0, most likely, this is just an unfortunate inlining decision. Also, it only reproduces on Linux: