[Perf] Windows/arm64: 1 Regression on 3/7/2023 1:52:33 AM

[performanceautofiler]

Run Information

Architecture	arm64
OS	Windows 10.0.19041
Baseline	c16c7aedd1dbccbb085b6451ad096fda0c1d194f
Compare	2d5a9162f6bd9583981d54363d077a04e4efc868
Diff	Diff

Regressions in System.Tests.Perf_Double

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ToStringWithFormat - Duration of single invocation	194.68 ns	208.01 ns	1.07	0.00	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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_Double*'

Payloads

Baseline
Compare

Histogram

System.Tests.Perf_Double.ToStringWithFormat(value: -1.7976931348623157E+308, format: "G17")

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 208.00995983609883 > 204.34733903495226.
IsChangePoint: Marked as a change because one of 1/13/2023 8:11:05 PM, 2/17/2023 12:28:21 PM, 3/6/2023 9:06:14 PM, 3/9/2023 2:25:45 AM falls between 2/28/2023 7:22:28 AM and 3/9/2023 2:25:45 AM.
IsRegressionStdDev: Marked as regression because -29.140714100285486 (T) = (0 -208.60392097831192) / Math.Sqrt((0.2243479113399539 / (35)) + (1.5413133171567506 / (7))) is less than -2.0210753903043583 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (35) + (7) - 2, .025) and -0.07123441306481802 = (194.7322812207768 - 208.60392097831192) / 194.7322812207768 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

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[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

Architecture	arm64
OS	Windows 10.0.19041
Baseline	c16c7aedd1dbccbb085b6451ad096fda0c1d194f
Compare	2d5a9162f6bd9583981d54363d077a04e4efc868
Diff	Diff

Regressions in System.Tests.Perf_Double

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ToStringWithFormat - Duration of single invocation	194.68 ns	208.01 ns	1.07	0.00	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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_Double*'

Payloads

Baseline
Compare

Histogram

System.Tests.Perf_Double.ToStringWithFormat(value: -1.7976931348623157E+308, format: "G17")

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 208.00995983609883 > 204.34733903495226.
IsChangePoint: Marked as a change because one of 1/13/2023 8:11:05 PM, 2/17/2023 12:28:21 PM, 3/6/2023 9:06:14 PM, 3/9/2023 2:25:45 AM falls between 2/28/2023 7:22:28 AM and 3/9/2023 2:25:45 AM.
IsRegressionStdDev: Marked as regression because -29.140714100285486 (T) = (0 -208.60392097831192) / Math.Sqrt((0.2243479113399539 / (35)) + (1.5413133171567506 / (7))) is less than -2.0210753903043583 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (35) + (7) - 2, .025) and -0.07123441306481802 = (194.7322812207768 - 208.60392097831192) / 194.7322812207768 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:	tannergooding
Labels:	arch-arm64, tenet-performance, tenet-performance-benchmarks, area-CodeGen-coreclr, untriaged
Milestone:	-

[EgorBo]

Seems to be regressed via #82766 cc @jakobbotsch (arm64)

[jakobbotsch]

#82766 had only these 4 diffs in benchmarks:

Will wait a bit to see if this one doesn't return back to normal before I go investigate

[jakobbotsch]

This is back to normal: