Regressions in System.IO.Tests.Perf_RandomAccess

[performanceautofiler]

Run Information

Architecture	arm64
OS	Windows 10.0.19041
Baseline	20294957616061616e672b43f1d962460b7f4234
Compare	eb57c1276add1ec7e35897bfdbbebb648839dee3
Diff	Diff

Regressions in System.IO.Tests.Perf_RandomAccess

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ReadScatterAsync - Duration of single invocation	4.82 ms	5.16 ms	1.07	0.00	True

Test Report

Repro

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

Payloads

Baseline
Compare

Histogram

System.IO.Tests.Perf_RandomAccess.ReadScatterAsync(fileSize: 1048576, buffersSize: 16384, options: Asynchronous)

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 5.163939665653496 > 5.0542304047888384.
IsChangePoint: Marked as a change because one of 3/4/2022 11:33:07 AM, 3/9/2022 10:55:02 PM falls between 3/1/2022 6:59:52 AM and 3/9/2022 10:55:02 PM.
IsRegressionStdDev: Marked as regression because -33.52572914974136 (T) = (0 -5232528.847938628) / Math.Sqrt((2003371671.5500438 / (19)) + (1359554745.640083 / (18))) is less than -2.0301079282477414 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (19) + (18) - 2, .025) and -0.0943228896693405 = (4781521.886579274 - 5232528.847938628) / 4781521.886579274 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 as 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.

[DrewScoggins]

Could be related to #64834

[ghost]

Tagging subscribers to this area: @mangod9
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Run Information

Architecture	arm64
OS	Windows 10.0.19041
Baseline	20294957616061616e672b43f1d962460b7f4234
Compare	eb57c1276add1ec7e35897bfdbbebb648839dee3
Diff	Diff

Regressions in System.IO.Tests.Perf_RandomAccess

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ReadScatterAsync - Duration of single invocation	4.82 ms	5.16 ms	1.07	0.00	True

Test Report

Repro

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

Payloads

Baseline
Compare

Histogram

System.IO.Tests.Perf_RandomAccess.ReadScatterAsync(fileSize: 1048576, buffersSize: 16384, options: Asynchronous)

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 5.163939665653496 > 5.0542304047888384.
IsChangePoint: Marked as a change because one of 3/4/2022 11:33:07 AM, 3/9/2022 10:55:02 PM falls between 3/1/2022 6:59:52 AM and 3/9/2022 10:55:02 PM.
IsRegressionStdDev: Marked as regression because -33.52572914974136 (T) = (0 -5232528.847938628) / Math.Sqrt((2003371671.5500438 / (19)) + (1359554745.640083 / (18))) is less than -2.0301079282477414 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (19) + (18) - 2, .025) and -0.0943228896693405 = (4781521.886579274 - 5232528.847938628) / 4781521.886579274 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 as regression because Edge Detector said so.

Docs

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

Author:	performanceautofiler[bot]
Assignees:	-
Labels:	area-System.Threading, tenet-performance, tenet-performance-benchmarks, untriaged, refs/heads/main, RunKind=micro, Windows 10.0.19041, Regression, CoreClr, arm64
Milestone:	-

[kouvel]

Closing as duplicate of #67965