[Perf] Linux/arm64: 2 Regressions on 12/7/2023 1:43:07 AM

[performanceautofiler]

Run Information

Name	Value
Architecture	arm64
OS	ubuntu 20.04
Queue	AmpereUbuntu
Baseline	6798f84d1b50fa1aa76f6405f04cb3f2f77da641
Compare	31933a3280132b9d925ac291ccba9d034e375fdb
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Text.Perf_Ascii

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
ToLower_Bytes_Chars - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	23.49 ns	25.99 ns	1.11	0.14	False
ToUpper_Bytes_Chars - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	23.54 ns	28.74 ns	1.22	0.15	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.Text.Perf_Ascii*'

Payloads

Baseline
Compare

System.Text.Perf_Ascii.ToLower_Bytes_Chars(Size: 128)

ETL Files

Histogram

JIT Disasms

System.Text.Perf_Ascii.ToUpper_Bytes_Chars(Size: 128)

ETL Files

Histogram

JIT Disasms

Docs

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

[EgorBo]

Nothing susp in dotnet/runtime@6798f84...b345e2d except maybe dotnet/runtime#95597 ?