DisassemblyDiagnoser broken on Linux

[adamsitnik]

Reported by @jakobbotsch in dotnet/runtime#67592 (comment)

it has been most likely caused by one of my recent changes (not part of 0.13.1 but what we have in master branch)

it works fine on Windows

[adamsitnik]

@jakobbotsch I've tried to repro on Ubuntu 18.04 but I've failed:

// Validating benchmarks:
// ***** BenchmarkRunner: Start   *****
// ***** Found 2 benchmark(s) in total *****
// ***** Building 1 exe(s) in Parallel: Start   *****
// start dotnet  restore /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1 /p:Deterministic=true /p:Optimize=true in /home/adam/projects/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/5e59f8eb-4da7-4513-a5c3-a28e365cce58
// command took 1.68s and exited with 0
// start dotnet  build -c Release --no-restore /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1 /p:Deterministic=true /p:Optimize=true in /home/adam/projects/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/5e59f8eb-4da7-4513-a5c3-a28e365cce58
// command took 19.58s and exited with 1
// start dotnet  build -c Release --no-restore --no-dependencies /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1 /p:Deterministic=true /p:Optimize=true in /home/adam/projects/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/5e59f8eb-4da7-4513-a5c3-a28e365cce58
// command took 2.71s and exited with 0
// ***** Done, took 00:00:24 (24.03 sec)   *****
// Found 2 benchmarks:
//   Base64EncodeDecodeInPlaceTests.Base64EncodeInPlace: Job-MYMTFY(PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30) [NumberOfBytes=200000000]
//   Base64EncodeDecodeInPlaceTests.Base64DecodeInPlace: Job-MYMTFY(PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30) [NumberOfBytes=200000000]

// **************************
// Benchmark: Base64EncodeDecodeInPlaceTests.Base64EncodeInPlace: Job-MYMTFY(PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30) [NumberOfBytes=200000000]
// *** Execute ***
// Launch: 1 / 1
// Execute: dotnet 5e59f8eb-4da7-4513-a5c3-a28e365cce58.dll --benchmarkName "System.Buffers.Text.Tests.Base64EncodeDecodeInPlaceTests.Base64EncodeInPlace(NumberOfBytes: 200000000)" --job "PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30" --benchmarkId 0 in /home/adam/projects/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/5e59f8eb-4da7-4513-a5c3-a28e365cce58/bin/Release/net7.0
Failed to set up high priority. Make sure you have the right permissions. Message: Permission denied
// BeforeAnythingElse

// Benchmark Process Environment Information:
// Runtime=.NET 7.0.0 (7.0.22.25207), X64 RyuJIT
// GC=Concurrent Workstation
// Job: Job-QKJAPZ(PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30)

OverheadJitting  1: 1 op, 247571.00 ns, 247.5710 us/op
WorkloadJitting  1: 1 op, 543837018.00 ns, 543.8370 ms/op

OverheadWarmup   1: 1 op, 260.00 ns, 260.0000 ns/op
OverheadWarmup   2: 1 op, 283.00 ns, 283.0000 ns/op
OverheadWarmup   3: 1 op, 274.00 ns, 274.0000 ns/op
OverheadWarmup   4: 1 op, 289.00 ns, 289.0000 ns/op
OverheadWarmup   5: 1 op, 268.00 ns, 268.0000 ns/op

OverheadActual   1: 1 op, 264.00 ns, 264.0000 ns/op
OverheadActual   2: 1 op, 287.00 ns, 287.0000 ns/op
OverheadActual   3: 1 op, 279.00 ns, 279.0000 ns/op
OverheadActual   4: 1 op, 336.00 ns, 336.0000 ns/op
OverheadActual   5: 1 op, 274.00 ns, 274.0000 ns/op
OverheadActual   6: 1 op, 291.00 ns, 291.0000 ns/op
OverheadActual   7: 1 op, 272.00 ns, 272.0000 ns/op
OverheadActual   8: 1 op, 260.00 ns, 260.0000 ns/op
OverheadActual   9: 1 op, 274.00 ns, 274.0000 ns/op
OverheadActual  10: 1 op, 227.00 ns, 227.0000 ns/op
OverheadActual  11: 1 op, 253.00 ns, 253.0000 ns/op
OverheadActual  12: 1 op, 270.00 ns, 270.0000 ns/op
OverheadActual  13: 1 op, 261.00 ns, 261.0000 ns/op
OverheadActual  14: 1 op, 230.00 ns, 230.0000 ns/op
OverheadActual  15: 1 op, 267.00 ns, 267.0000 ns/op
OverheadActual  16: 1 op, 271.00 ns, 271.0000 ns/op
OverheadActual  17: 1 op, 224.00 ns, 224.0000 ns/op
OverheadActual  18: 1 op, 304.00 ns, 304.0000 ns/op
OverheadActual  19: 1 op, 282.00 ns, 282.0000 ns/op
OverheadActual  20: 1 op, 281.00 ns, 281.0000 ns/op

WorkloadWarmup   1: 1 op, 528141343.00 ns, 528.1413 ms/op
WorkloadWarmup   2: 1 op, 524465140.00 ns, 524.4651 ms/op
WorkloadWarmup   3: 1 op, 524030273.00 ns, 524.0303 ms/op
WorkloadWarmup   4: 1 op, 525895337.00 ns, 525.8953 ms/op
WorkloadWarmup   5: 1 op, 526854369.00 ns, 526.8544 ms/op
WorkloadWarmup   6: 1 op, 524880680.00 ns, 524.8807 ms/op
WorkloadWarmup   7: 1 op, 533621758.00 ns, 533.6218 ms/op
WorkloadWarmup   8: 1 op, 523871011.00 ns, 523.8710 ms/op
WorkloadWarmup   9: 1 op, 526126786.00 ns, 526.1268 ms/op
WorkloadWarmup  10: 1 op, 523900130.00 ns, 523.9001 ms/op
WorkloadWarmup  11: 1 op, 525209726.00 ns, 525.2097 ms/op
WorkloadWarmup  12: 1 op, 523619578.00 ns, 523.6196 ms/op
WorkloadWarmup  13: 1 op, 528284469.00 ns, 528.2845 ms/op
WorkloadWarmup  14: 1 op, 526322116.00 ns, 526.3221 ms/op
WorkloadWarmup  15: 1 op, 523968042.00 ns, 523.9680 ms/op
WorkloadWarmup  16: 1 op, 536720535.00 ns, 536.7205 ms/op
WorkloadWarmup  17: 1 op, 525672072.00 ns, 525.6721 ms/op
WorkloadWarmup  18: 1 op, 587222139.00 ns, 587.2221 ms/op
WorkloadWarmup  19: 1 op, 524406575.00 ns, 524.4066 ms/op
WorkloadWarmup  20: 1 op, 523391704.00 ns, 523.3917 ms/op
WorkloadWarmup  21: 1 op, 523702053.00 ns, 523.7021 ms/op
WorkloadWarmup  22: 1 op, 525644027.00 ns, 525.6440 ms/op
WorkloadWarmup  23: 1 op, 523267625.00 ns, 523.2676 ms/op
WorkloadWarmup  24: 1 op, 523823112.00 ns, 523.8231 ms/op
WorkloadWarmup  25: 1 op, 524116810.00 ns, 524.1168 ms/op
WorkloadWarmup  26: 1 op, 526319791.00 ns, 526.3198 ms/op
WorkloadWarmup  27: 1 op, 527384416.00 ns, 527.3844 ms/op
WorkloadWarmup  28: 1 op, 527350584.00 ns, 527.3506 ms/op
WorkloadWarmup  29: 1 op, 524273773.00 ns, 524.2738 ms/op
WorkloadWarmup  30: 1 op, 525881793.00 ns, 525.8818 ms/op

// BeforeActualRun
WorkloadActual   1: 1 op, 156360903.00 ns, 156.3609 ms/op
WorkloadActual   2: 1 op, 159785805.00 ns, 159.7858 ms/op
WorkloadActual   3: 1 op, 157336550.00 ns, 157.3365 ms/op
WorkloadActual   4: 1 op, 156677769.00 ns, 156.6778 ms/op
WorkloadActual   5: 1 op, 156659147.00 ns, 156.6591 ms/op
WorkloadActual   6: 1 op, 156587560.00 ns, 156.5876 ms/op
WorkloadActual   7: 1 op, 160299353.00 ns, 160.2994 ms/op
WorkloadActual   8: 1 op, 157204003.00 ns, 157.2040 ms/op
WorkloadActual   9: 1 op, 156942899.00 ns, 156.9429 ms/op
WorkloadActual  10: 1 op, 156784176.00 ns, 156.7842 ms/op
WorkloadActual  11: 1 op, 159885991.00 ns, 159.8860 ms/op
WorkloadActual  12: 1 op, 156448912.00 ns, 156.4489 ms/op
WorkloadActual  13: 1 op, 156649743.00 ns, 156.6497 ms/op
WorkloadActual  14: 1 op, 157205072.00 ns, 157.2051 ms/op
WorkloadActual  15: 1 op, 156453966.00 ns, 156.4540 ms/op

// AfterActualRun
WorkloadResult   1: 1 op, 156360631.50 ns, 156.3606 ms/op
WorkloadResult   2: 1 op, 157336278.50 ns, 157.3363 ms/op
WorkloadResult   3: 1 op, 156677497.50 ns, 156.6775 ms/op
WorkloadResult   4: 1 op, 156658875.50 ns, 156.6589 ms/op
WorkloadResult   5: 1 op, 156587288.50 ns, 156.5873 ms/op
WorkloadResult   6: 1 op, 157203731.50 ns, 157.2037 ms/op
WorkloadResult   7: 1 op, 156942627.50 ns, 156.9426 ms/op
WorkloadResult   8: 1 op, 156783904.50 ns, 156.7839 ms/op
WorkloadResult   9: 1 op, 156448640.50 ns, 156.4486 ms/op
WorkloadResult  10: 1 op, 156649471.50 ns, 156.6495 ms/op
WorkloadResult  11: 1 op, 157204800.50 ns, 157.2048 ms/op
WorkloadResult  12: 1 op, 156453694.50 ns, 156.4537 ms/op
GC:  0 0 0 816 1
Threading:  0 0 1

// AfterAll
// Benchmark Process 5139 has exited with code 0.

Mean = 156.776 ms, StdErr = 0.094 ms (0.06%), N = 12, StdDev = 0.326 ms
Min = 156.361 ms, Q1 = 156.554 ms, Median = 156.668 ms, Q3 = 157.008 ms, Max = 157.336 ms
IQR = 0.454 ms, LowerFence = 155.873 ms, UpperFence = 157.689 ms
ConfidenceInterval = [156.358 ms; 157.193 ms] (CI 99.9%), Margin = 0.417 ms (0.27% of Mean)
Skewness = 0.45, Kurtosis = 1.63, MValue = 2

// ** Remained 1 (50.0%) benchmark(s) to run. Estimated finish 2022-05-04 10:53 (0h 0m from now) **
// **************************
// Benchmark: Base64EncodeDecodeInPlaceTests.Base64DecodeInPlace: Job-MYMTFY(PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30) [NumberOfBytes=200000000]
// *** Execute ***
// Launch: 1 / 1
// Execute: dotnet 5e59f8eb-4da7-4513-a5c3-a28e365cce58.dll --benchmarkName "System.Buffers.Text.Tests.Base64EncodeDecodeInPlaceTests.Base64DecodeInPlace(NumberOfBytes: 200000000)" --job "PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30" --benchmarkId 1 in /home/adam/projects/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/5e59f8eb-4da7-4513-a5c3-a28e365cce58/bin/Release/net7.0
Failed to set up high priority. Make sure you have the right permissions. Message: Permission denied
// BeforeAnythingElse

// Benchmark Process Environment Information:
// Runtime=.NET 7.0.0 (7.0.22.25207), X64 RyuJIT
// GC=Concurrent Workstation
// Job: Job-ECITUW(PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30)

OverheadJitting  1: 1 op, 266750.00 ns, 266.7500 us/op
WorkloadJitting  1: 1 op, 558631373.00 ns, 558.6314 ms/op

OverheadWarmup   1: 1 op, 426.00 ns, 426.0000 ns/op
OverheadWarmup   2: 1 op, 361.00 ns, 361.0000 ns/op
OverheadWarmup   3: 1 op, 277.00 ns, 277.0000 ns/op
OverheadWarmup   4: 1 op, 284.00 ns, 284.0000 ns/op
OverheadWarmup   5: 1 op, 297.00 ns, 297.0000 ns/op
OverheadWarmup   6: 1 op, 266.00 ns, 266.0000 ns/op
OverheadWarmup   7: 1 op, 304.00 ns, 304.0000 ns/op
OverheadWarmup   8: 1 op, 257.00 ns, 257.0000 ns/op

OverheadActual   1: 1 op, 330.00 ns, 330.0000 ns/op
OverheadActual   2: 1 op, 360.00 ns, 360.0000 ns/op
OverheadActual   3: 1 op, 306.00 ns, 306.0000 ns/op
OverheadActual   4: 1 op, 306.00 ns, 306.0000 ns/op
OverheadActual   5: 1 op, 319.00 ns, 319.0000 ns/op
OverheadActual   6: 1 op, 262.00 ns, 262.0000 ns/op
OverheadActual   7: 1 op, 294.00 ns, 294.0000 ns/op
OverheadActual   8: 1 op, 260.00 ns, 260.0000 ns/op
OverheadActual   9: 1 op, 262.00 ns, 262.0000 ns/op
OverheadActual  10: 1 op, 245.00 ns, 245.0000 ns/op
OverheadActual  11: 1 op, 246.00 ns, 246.0000 ns/op
OverheadActual  12: 1 op, 266.00 ns, 266.0000 ns/op
OverheadActual  13: 1 op, 242.00 ns, 242.0000 ns/op
OverheadActual  14: 1 op, 222.00 ns, 222.0000 ns/op
OverheadActual  15: 1 op, 233.00 ns, 233.0000 ns/op
OverheadActual  16: 1 op, 260.00 ns, 260.0000 ns/op
OverheadActual  17: 1 op, 207.00 ns, 207.0000 ns/op
OverheadActual  18: 1 op, 323.00 ns, 323.0000 ns/op
OverheadActual  19: 1 op, 283.00 ns, 283.0000 ns/op
OverheadActual  20: 1 op, 311.00 ns, 311.0000 ns/op

WorkloadWarmup   1: 1 op, 591210894.00 ns, 591.2109 ms/op
WorkloadWarmup   2: 1 op, 556895253.00 ns, 556.8953 ms/op
WorkloadWarmup   3: 1 op, 556743796.00 ns, 556.7438 ms/op
WorkloadWarmup   4: 1 op, 560308443.00 ns, 560.3084 ms/op
WorkloadWarmup   5: 1 op, 556781667.00 ns, 556.7817 ms/op
WorkloadWarmup   6: 1 op, 556889856.00 ns, 556.8899 ms/op
WorkloadWarmup   7: 1 op, 556994953.00 ns, 556.9950 ms/op
WorkloadWarmup   8: 1 op, 557018530.00 ns, 557.0185 ms/op
WorkloadWarmup   9: 1 op, 557915593.00 ns, 557.9156 ms/op
WorkloadWarmup  10: 1 op, 556410992.00 ns, 556.4110 ms/op
WorkloadWarmup  11: 1 op, 556772919.00 ns, 556.7729 ms/op
WorkloadWarmup  12: 1 op, 558856085.00 ns, 558.8561 ms/op
WorkloadWarmup  13: 1 op, 556683278.00 ns, 556.6833 ms/op
WorkloadWarmup  14: 1 op, 557962626.00 ns, 557.9626 ms/op
WorkloadWarmup  15: 1 op, 556924936.00 ns, 556.9249 ms/op
WorkloadWarmup  16: 1 op, 556968679.00 ns, 556.9687 ms/op
WorkloadWarmup  17: 1 op, 559226083.00 ns, 559.2261 ms/op
WorkloadWarmup  18: 1 op, 556230494.00 ns, 556.2305 ms/op
WorkloadWarmup  19: 1 op, 556959402.00 ns, 556.9594 ms/op
WorkloadWarmup  20: 1 op, 557461918.00 ns, 557.4619 ms/op
WorkloadWarmup  21: 1 op, 556340384.00 ns, 556.3404 ms/op
WorkloadWarmup  22: 1 op, 556301348.00 ns, 556.3013 ms/op
WorkloadWarmup  23: 1 op, 559330121.00 ns, 559.3301 ms/op
WorkloadWarmup  24: 1 op, 556533352.00 ns, 556.5334 ms/op
WorkloadWarmup  25: 1 op, 558325231.00 ns, 558.3252 ms/op
WorkloadWarmup  26: 1 op, 557978052.00 ns, 557.9781 ms/op
WorkloadWarmup  27: 1 op, 556802400.00 ns, 556.8024 ms/op
WorkloadWarmup  28: 1 op, 559928349.00 ns, 559.9283 ms/op
WorkloadWarmup  29: 1 op, 558168765.00 ns, 558.1688 ms/op
WorkloadWarmup  30: 1 op, 558231165.00 ns, 558.2312 ms/op

// BeforeActualRun
WorkloadActual   1: 1 op, 155333846.00 ns, 155.3338 ms/op
WorkloadActual   2: 1 op, 158174831.00 ns, 158.1748 ms/op
WorkloadActual   3: 1 op, 155574818.00 ns, 155.5748 ms/op
WorkloadActual   4: 1 op, 156106166.00 ns, 156.1062 ms/op
WorkloadActual   5: 1 op, 155494602.00 ns, 155.4946 ms/op
WorkloadActual   6: 1 op, 157972208.00 ns, 157.9722 ms/op
WorkloadActual   7: 1 op, 155471172.00 ns, 155.4712 ms/op
WorkloadActual   8: 1 op, 156209774.00 ns, 156.2098 ms/op
WorkloadActual   9: 1 op, 155624088.00 ns, 155.6241 ms/op
WorkloadActual  10: 1 op, 156516105.00 ns, 156.5161 ms/op
WorkloadActual  11: 1 op, 155569007.00 ns, 155.5690 ms/op
WorkloadActual  12: 1 op, 155835940.00 ns, 155.8359 ms/op
WorkloadActual  13: 1 op, 155224825.00 ns, 155.2248 ms/op
WorkloadActual  14: 1 op, 155486635.00 ns, 155.4866 ms/op
WorkloadActual  15: 1 op, 156275851.00 ns, 156.2759 ms/op

// AfterActualRun
WorkloadResult   1: 1 op, 155333582.00 ns, 155.3336 ms/op
WorkloadResult   2: 1 op, 155574554.00 ns, 155.5746 ms/op
WorkloadResult   3: 1 op, 156105902.00 ns, 156.1059 ms/op
WorkloadResult   4: 1 op, 155494338.00 ns, 155.4943 ms/op
WorkloadResult   5: 1 op, 155470908.00 ns, 155.4709 ms/op
WorkloadResult   6: 1 op, 156209510.00 ns, 156.2095 ms/op
WorkloadResult   7: 1 op, 155623824.00 ns, 155.6238 ms/op
WorkloadResult   8: 1 op, 156515841.00 ns, 156.5158 ms/op
WorkloadResult   9: 1 op, 155568743.00 ns, 155.5687 ms/op
WorkloadResult  10: 1 op, 155835676.00 ns, 155.8357 ms/op
WorkloadResult  11: 1 op, 155224561.00 ns, 155.2246 ms/op
WorkloadResult  12: 1 op, 155486371.00 ns, 155.4864 ms/op
WorkloadResult  13: 1 op, 156275587.00 ns, 156.2756 ms/op
GC:  0 0 0 816 1
Threading:  0 0 1

// AfterAll
// Benchmark Process 5153 has exited with code 0.

Mean = 155.748 ms, StdErr = 0.112 ms (0.07%), N = 13, StdDev = 0.403 ms
Min = 155.225 ms, Q1 = 155.486 ms, Median = 155.575 ms, Q3 = 156.106 ms, Max = 156.516 ms
IQR = 0.620 ms, LowerFence = 154.557 ms, UpperFence = 157.035 ms
ConfidenceInterval = [155.265 ms; 156.230 ms] (CI 99.9%), Margin = 0.483 ms (0.31% of Mean)
Skewness = 0.54, Kurtosis = 1.77, MValue = 2

// ** Remained 0 (0.0%) benchmark(s) to run. Estimated finish 2022-05-04 10:53 (0h 0m from now) **
// ***** BenchmarkRunner: Finish  *****

// * Export *
  home/adam/projects/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/BenchmarkDotNet.Artifacts/results/System.Buffers.Text.Tests.Base64EncodeDecodeInPlaceTests-report-github.md
  home/adam/projects/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/BenchmarkDotNet.Artifacts/results/System.Buffers.Text.Tests.Base64EncodeDecodeInPlaceTests-report-full.json
  home/adam/projects/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/BenchmarkDotNet.Artifacts/results/System.Buffers.Text.Tests.Base64EncodeDecodeInPlaceTests-asm.md

// * Detailed results *
Base64EncodeDecodeInPlaceTests.Base64EncodeInPlace: Job-MYMTFY(PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30) [NumberOfBytes=200000000]
Runtime = .NET 7.0.0 (7.0.22.25207), X64 RyuJIT; GC = Concurrent Workstation
Mean = 156.776 ms, StdErr = 0.094 ms (0.06%), N = 12, StdDev = 0.326 ms
Min = 156.361 ms, Q1 = 156.554 ms, Median = 156.668 ms, Q3 = 157.008 ms, Max = 157.336 ms
IQR = 0.454 ms, LowerFence = 155.873 ms, UpperFence = 157.689 ms
ConfidenceInterval = [156.358 ms; 157.193 ms] (CI 99.9%), Margin = 0.417 ms (0.27% of Mean)
Skewness = 0.45, Kurtosis = 1.63, MValue = 2
-------------------- Histogram --------------------
[156.174 ms ; 157.523 ms) | @@@@@@@@@@@@
---------------------------------------------------

Base64EncodeDecodeInPlaceTests.Base64DecodeInPlace: Job-MYMTFY(PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30) [NumberOfBytes=200000000]
Runtime = .NET 7.0.0 (7.0.22.25207), X64 RyuJIT; GC = Concurrent Workstation
Mean = 155.748 ms, StdErr = 0.112 ms (0.07%), N = 13, StdDev = 0.403 ms
Min = 155.225 ms, Q1 = 155.486 ms, Median = 155.575 ms, Q3 = 156.106 ms, Max = 156.516 ms
IQR = 0.620 ms, LowerFence = 154.557 ms, UpperFence = 157.035 ms
ConfidenceInterval = [155.265 ms; 156.230 ms] (CI 99.9%), Margin = 0.483 ms (0.31% of Mean)
Skewness = 0.54, Kurtosis = 1.77, MValue = 2
-------------------- Histogram --------------------
[155.000 ms ; 156.741 ms) | @@@@@@@@@@@@@
---------------------------------------------------

// * Summary *

BenchmarkDotNet=v0.13.1.1786-nightly, OS=ubuntu 18.04
Intel Xeon CPU E5-1650 v4 3.60GHz, 1 CPU, 12 logical and 6 physical cores
.NET SDK=7.0.100-preview.5.22253.34
  [Host]     : .NET 7.0.0 (7.0.22.25207), X64 RyuJIT
  Job-MYMTFY : .NET 7.0.0 (7.0.22.25207), X64 RyuJIT

PowerPlanMode=00000000-0000-0000-0000-000000000000  InvocationCount=1  IterationTime=250.0000 ms  
MaxIterationCount=20  MinIterationCount=15  UnrollFactor=1  
WarmupCount=30  

|              Method | NumberOfBytes |     Mean |   Error |  StdDev |   Median |      Min |      Max | Code Size | Allocated |
|-------------------- |-------------- |---------:|--------:|--------:|---------:|---------:|---------:|----------:|----------:|
| Base64EncodeInPlace |     200000000 | 156.8 ms | 0.42 ms | 0.33 ms | 156.7 ms | 156.4 ms | 157.3 ms |     560 B |     816 B |
| Base64DecodeInPlace |     200000000 | 155.7 ms | 0.48 ms | 0.40 ms | 155.6 ms | 155.2 ms | 156.5 ms |     546 B |     816 B |

// * Hints *
Outliers
  Base64EncodeDecodeInPlaceTests.Base64EncodeInPlace: PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30 -> 3 outliers were removed (159.79 ms..160.30 ms)
  Base64EncodeDecodeInPlaceTests.Base64DecodeInPlace: PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30 -> 2 outliers were removed (157.97 ms, 158.17 ms)

// * Legends *
  NumberOfBytes : Value of the 'NumberOfBytes' parameter
  Mean          : Arithmetic mean of all measurements
  Error         : Half of 99.9% confidence interval
  StdDev        : Standard deviation of all measurements
  Median        : Value separating the higher half of all measurements (50th percentile)
  Min           : Minimum
  Max           : Maximum
  Code Size     : Native code size of the disassembled method(s)
  Allocated     : Allocated memory per single operation (managed only, inclusive, 1KB = 1024B)
  1 ms          : 1 Millisecond (0.001 sec)

// * Diagnostic Output - DisassemblyDiagnoser *
Disassembled benchmarks got exported to ".\BenchmarkDotNet.Artifacts\results\*asm.md"
// * Diagnostic Output - MemoryDiagnoser *


// ***** BenchmarkRunner: End *****
Run time: 00:00:46 (46.85 sec), executed benchmarks: 2

Global total time: 00:01:11 (71.09 sec), executed benchmarks: 2
// * Artifacts cleanup *

.NET 7.0.0 (7.0.22.25207), X64 RyuJIT

; System.Buffers.Text.Tests.Base64EncodeDecodeInPlaceTests.Base64EncodeInPlace()
       push      rbp
       sub       rsp,10
       lea       rbp,[rsp+10]
       xor       eax,eax
       mov       [rbp-8],rax
       mov       [rbp-10],rdi
       mov       rsi,[rdi+10]
       test      rsi,rsi
       je        short M00_L01
       lea       rdx,[rsi+10]
       mov       esi,[rsi+8]
M00_L00:
       mov       rdi,rdx
       mov       rdx,[rbp-10]
       mov       rdx,[rdx+8]
       mov       edx,[rdx+8]
       lea       rcx,[rbp-8]
       call      qword ptr [System.Buffers.Text.Base64.EncodeToUtf8InPlace(System.Span`1<Byte>, Int32, Int32 ByRef)]
       nop
       add       rsp,10
       pop       rbp
       ret
M00_L01:
       xor       edx,edx
       xor       esi,esi
       jmp       short M00_L00
; Total bytes of code 73

; System.Buffers.Text.Base64.EncodeToUtf8InPlace(System.Span`1<Byte>, Int32, Int32 ByRef)
       push      rbp
       push      rbx
       push      rax
       lea       rbp,[rsp+10]
       xor       eax,eax
       mov       [rbp-10],rax
       mov       r8d,edx
       test      esi,esi
       jne       short M01_L00
       xor       eax,eax
       mov       [rcx],eax
       add       rsp,8
       pop       rbx
       pop       rbp
       ret
M01_L00:
       mov       [rbp-10],rdi
       cmp       r8d,5FFFFFFD
       ja        near ptr M01_L07
       lea       edx,[r8+2]
       mov       r9d,55555556
       mov       eax,r9d
       imul      edx
       mov       r9d,edx
       shr       r9d,1F
       add       r9d,edx
       shl       r9d,2
       cmp       esi,r9d
       jl        near ptr M01_L06
       mov       edx,55555556
       mov       eax,edx
       imul      r8d
       mov       eax,edx
       shr       eax,1F
       add       eax,edx
       lea       eax,[rax+rax*2]
       mov       esi,r8d
       sub       esi,eax
       lea       eax,[r9-4]
       sub       r8d,esi
       test      esi,esi
       je        near ptr M01_L03
       cmp       esi,1
       jne       short M01_L01
       mov       esi,r8d
       movzx     esi,byte ptr [rdi+rsi]
       shl       esi,8
       mov       edx,esi
       shr       edx,0A
       mov       r10,7F4D0E132BD8
       movzx     edx,byte ptr [rdx+r10]
       shr       esi,4
       and       esi,3F
       movzx     esi,byte ptr [rsi+r10]
       shl       esi,8
       or        esi,edx
       or        esi,3D3D0000
       jmp       short M01_L02
M01_L01:
       mov       esi,r8d
       add       rsi,rdi
       movzx     edx,byte ptr [rsi]
       movzx     esi,byte ptr [rsi+1]
       shl       edx,10
       shl       esi,8
       or        esi,edx
       mov       edx,esi
       shr       edx,12
       mov       r10,7F4D0E132BD8
       movzx     edx,byte ptr [rdx+r10]
       mov       r10d,esi
       shr       r10d,0C
       and       r10d,3F
       mov       r11,7F4D0E132BD8
       movzx     r10d,byte ptr [r10+r11]
       shr       esi,6
       and       esi,3F
       movzx     esi,byte ptr [rsi+r11]
       shl       r10d,8
       or        edx,r10d
       shl       esi,10
       or        esi,edx
       or        esi,3D000000
M01_L02:
       mov       edx,eax
       mov       [rdi+rdx],esi
       add       eax,0FFFFFFFC
M01_L03:
       add       r8d,0FFFFFFFD
       js        near ptr M01_L05
M01_L04:
       mov       esi,r8d
       add       rsi,rdi
       movzx     edx,byte ptr [rsi]
       movzx     r10d,byte ptr [rsi+1]
       movzx     esi,byte ptr [rsi+2]
       shl       edx,10
       shl       r10d,8
       or        edx,r10d
       or        esi,edx
       mov       edx,esi
       shr       edx,12
       mov       r10,7F4D0E132BD8
       movzx     edx,byte ptr [rdx+r10]
       mov       r10d,esi
       shr       r10d,0C
       and       r10d,3F
       mov       r11,7F4D0E132BD8
       movzx     r10d,byte ptr [r10+r11]
       mov       r11d,esi
       shr       r11d,6
       and       r11d,3F
       mov       rbx,7F4D0E132BD8
       movzx     r11d,byte ptr [r11+rbx]
       and       esi,3F
       movzx     esi,byte ptr [rsi+rbx]
       shl       r10d,8
       or        edx,r10d
       shl       r11d,10
       or        edx,r11d
       shl       esi,18
       or        esi,edx
       mov       edx,eax
       mov       [rdi+rdx],esi
       add       eax,0FFFFFFFC
       add       r8d,0FFFFFFFD
       jns       near ptr M01_L04
M01_L05:
       mov       [rcx],r9d
       xor       eax,eax
       add       rsp,8
       pop       rbx
       pop       rbp
       ret
M01_L06:
       xor       eax,eax
       mov       [rcx],eax
       mov       eax,1
       add       rsp,8
       pop       rbx
       pop       rbp
       ret
M01_L07:
       xor       edi,edi
       call      qword ptr [7F4D0E261CC0]
       int       3
; Total bytes of code 487

.NET 7.0.0 (7.0.22.25207), X64 RyuJIT

; System.Buffers.Text.Tests.Base64EncodeDecodeInPlaceTests.Base64DecodeInPlace()
       push      rbp
       sub       rsp,10
       lea       rbp,[rsp+10]
       xor       eax,eax
       mov       [rbp-8],rax
       mov       rdi,[rdi+10]
       test      rdi,rdi
       je        short M00_L01
       lea       rsi,[rdi+10]
       mov       edi,[rdi+8]
M00_L00:
       mov       [rbp-0C],edi
       mov       rdi,rsi
       mov       esi,[rbp-0C]
       lea       rdx,[rbp-8]
       call      qword ptr [System.Buffers.Text.Base64.DecodeFromUtf8InPlace(System.Span`1<Byte>, Int32 ByRef)]
       nop
       add       rsp,10
       pop       rbp
       ret
M00_L01:
       xor       esi,esi
       xor       edi,edi
       jmp       short M00_L00
; Total bytes of code 64

; System.Buffers.Text.Base64.DecodeFromUtf8InPlace(System.Span`1<Byte>, Int32 ByRef)
       push      rbp
       push      r14
       push      rbx
       sub       rsp,10
       lea       rbp,[rsp+20]
       xor       eax,eax
       mov       [rbp-18],rax
       test      esi,esi
       jne       short M01_L00
       xor       eax,eax
       mov       [rdx],eax
       add       rsp,10
       pop       rbx
       pop       r14
       pop       rbp
       ret
M01_L00:
       mov       [rbp-18],rdi
       xor       eax,eax
       xor       ecx,ecx
       mov       r8d,esi
       sar       r8d,2
       shl       r8d,2
       cmp       esi,r8d
       jne       near ptr M01_L06
       lea       r8d,[rsi-4]
       movsxd    r8,r8d
       test      r8,r8
       jle       near ptr M01_L02
M01_L01:
       mov       r9d,eax
       add       r9,rdi
       movzx     r10d,byte ptr [r9]
       movzx     r11d,byte ptr [r9+1]
       movzx     ebx,byte ptr [r9+2]
       movzx     r9d,byte ptr [r9+3]
       mov       r10d,r10d
       mov       r14,7F6709852C18
       movsx     r10,byte ptr [r10+r14]
       mov       r11d,r11d
       movsx     r11,byte ptr [r11+r14]
       mov       ebx,ebx
       movsx     rbx,byte ptr [rbx+r14]
       mov       r9d,r9d
       movsx     r9,byte ptr [r9+r14]
       shl       r10d,12
       shl       r11d,0C
       shl       ebx,6
       or        r10d,r9d
       or        r11d,ebx
       or        r10d,r11d
       mov       r9d,r10d
       test      r9d,r9d
       jl        near ptr M01_L06
       mov       r10d,ecx
       add       r10,rdi
       mov       r11d,r9d
       sar       r11d,10
       mov       [r10],r11b
       mov       r11d,r9d
       sar       r11d,8
       mov       [r10+1],r11b
       mov       [r10+2],r9b
       add       ecx,3
       add       eax,4
       mov       r9d,eax
       cmp       r9,r8
       jl        near ptr M01_L01
M01_L02:
       movzx     eax,byte ptr [rdi+r8]
       lea       r8d,[rsi-3]
       movsxd    r8,r8d
       movzx     r8d,byte ptr [rdi+r8]
       lea       r9d,[rsi-2]
       movsxd    r9,r9d
       movzx     r9d,byte ptr [rdi+r9]
       dec       esi
       movsxd    rsi,esi
       movzx     esi,byte ptr [rdi+rsi]
       mov       eax,eax
       mov       r10,7F6709852C18
       movsx     rax,byte ptr [rax+r10]
       mov       r8d,r8d
       movsx     r8,byte ptr [r8+r10]
       shl       eax,12
       shl       r8d,0C
       or        eax,r8d
       cmp       esi,3D
       je        short M01_L03
       mov       r9d,r9d
       mov       r8,7F6709852C18
       movsx     r8,byte ptr [r9+r8]
       mov       esi,esi
       mov       r9,7F6709852C18
       movsx     rsi,byte ptr [rsi+r9]
       shl       r8d,6
       or        eax,esi
       or        eax,r8d
       jl        short M01_L06
       mov       esi,ecx
       add       rdi,rsi
       mov       esi,eax
       sar       esi,10
       mov       [rdi],sil
       mov       esi,eax
       sar       esi,8
       mov       [rdi+1],sil
       mov       [rdi+2],al
       add       ecx,3
       jmp       short M01_L05
M01_L03:
       cmp       r9d,3D
       je        short M01_L04
       mov       esi,r9d
       mov       r8,7F6709852C18
       movsx     rsi,byte ptr [rsi+r8]
       shl       esi,6
       or        eax,esi
       jl        short M01_L06
       mov       esi,eax
       sar       esi,10
       mov       r8d,ecx
       mov       [rdi+r8],sil
       sar       eax,8
       lea       esi,[rcx+1]
       mov       [rdi+rsi],al
       add       ecx,2
       jmp       short M01_L05
M01_L04:
       test      eax,eax
       jl        short M01_L06
       sar       eax,10
       mov       esi,ecx
       mov       [rdi+rsi],al
       inc       ecx
M01_L05:
       mov       [rdx],ecx
       xor       eax,eax
       add       rsp,10
       pop       rbx
       pop       r14
       pop       rbp
       ret
M01_L06:
       mov       [rdx],ecx
       mov       eax,3
       add       rsp,10
       pop       rbx
       pop       r14
       pop       rbp
       ret
; Total bytes of code 482

[jakobbotsch]

It reproduces for me on the latest .NET 7.0 SDK docker image.

jakob@jakob-pc:~/dev/dotnet/performance$ sudo docker run -v /home/jakob/dev:/dndev -it mcr.microsoft.com/dotnet/sdk:7.0 /bin/bash
Unable to find image 'mcr.microsoft.com/dotnet/sdk:7.0' locally
7.0: Pulling from dotnet/sdk
1fe172e4850f: Pull complete
bf06eb87a616: Pull complete
b5912b36c187: Pull complete
033b86b887a6: Pull complete
1796abf09bb2: Pull complete
31ef1cc431b8: Pull complete
45a8d13c96d7: Pull complete
dca214db0c80: Pull complete
Digest: sha256:74e16f5796052d0108d508ae0eb5b4b5899c84f54b6977f21cee1d3fd4eb31dc
Status: Downloaded newer image for mcr.microsoft.com/dotnet/sdk:7.0
root@c6ce80843d94:/# cd /dndev/dotnet/performance/src/benchmarks/micro
root@c6ce80843d94:/dndev/dotnet/performance/src/benchmarks/micro# dotnet run -c Release -f net7.0 -- -f "*Base64EncodeDecodeInPlace*" --disasm
// Validating benchmarks:
// ***** BenchmarkRunner: Start   *****
// ***** Found 2 benchmark(s) in total *****
// ***** Building 1 exe(s) in Parallel: Start   *****
// start dotnet  restore /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1 /p:Deterministic=true /p:Optimize=true in /dndev/dotnet/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/d47ffc72-284c-4d46-8998-a427812b9b90
// command took 1.29s and exited with 0
// start dotnet  build -c Release --no-restore /p:UseSharedCompilation=false /p:BuildInParallel=false /m:1 /p:Deterministic=true /p:Optimize=true in /dndev/dotnet/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/d47ffc72-284c-4d46-8998-a427812b9b90
// command took 2.25s and exited with 0
// ***** Done, took 00:00:03 (3.59 sec)   *****
// Found 2 benchmarks:
//   Base64EncodeDecodeInPlaceTests.Base64EncodeInPlace: Job-IDUKFE(PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30) [NumberOfBytes=200000000]
//   Base64EncodeDecodeInPlaceTests.Base64DecodeInPlace: Job-IDUKFE(PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30) [NumberOfBytes=200000000]

// **************************
// Benchmark: Base64EncodeDecodeInPlaceTests.Base64EncodeInPlace: Job-IDUKFE(PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30) [NumberOfBytes=200000000]
// *** Execute ***
// Launch: 1 / 1
// Execute: dotnet d47ffc72-284c-4d46-8998-a427812b9b90.dll --benchmarkName "System.Buffers.Text.Tests.Base64EncodeDecodeInPlaceTests.Base64EncodeInPlace(NumberOfBytes: 200000000)" --job "PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30" --benchmarkId 0 in /dndev/dotnet/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/d47ffc72-284c-4d46-8998-a427812b9b90/bin/Release/net7.0
Failed to set up high priority. Make sure you have the right permissions. Message: Permission denied
// BeforeAnythingElse

// Benchmark Process Environment Information:
// Runtime=.NET 7.0.0 (7.0.22.17504), X64 RyuJIT
// GC=Concurrent Workstation
// Job: Job-RYMJSA(PowerPlanMode=00000000-0000-0000-0000-000000000000, InvocationCount=1, IterationTime=250.0000 ms, MaxIterationCount=20, MinIterationCount=15, UnrollFactor=1, WarmupCount=30)

OverheadJitting  1: 1 op, 178455.00 ns, 178.4550 us/op
WorkloadJitting  1: 1 op, 362055448.00 ns, 362.0554 ms/op

OverheadWarmup   1: 1 op, 371.00 ns, 371.0000 ns/op
OverheadWarmup   2: 1 op, 331.00 ns, 331.0000 ns/op
OverheadWarmup   3: 1 op, 300.00 ns, 300.0000 ns/op
OverheadWarmup   4: 1 op, 431.00 ns, 431.0000 ns/op
OverheadWarmup   5: 1 op, 280.00 ns, 280.0000 ns/op
OverheadWarmup   6: 1 op, 441.00 ns, 441.0000 ns/op
OverheadWarmup   7: 1 op, 281.00 ns, 281.0000 ns/op

OverheadActual   1: 1 op, 321.00 ns, 321.0000 ns/op
OverheadActual   2: 1 op, 320.00 ns, 320.0000 ns/op
OverheadActual   3: 1 op, 310.00 ns, 310.0000 ns/op
OverheadActual   4: 1 op, 321.00 ns, 321.0000 ns/op
OverheadActual   5: 1 op, 311.00 ns, 311.0000 ns/op
OverheadActual   6: 1 op, 290.00 ns, 290.0000 ns/op
OverheadActual   7: 1 op, 260.00 ns, 260.0000 ns/op
OverheadActual   8: 1 op, 331.00 ns, 331.0000 ns/op
OverheadActual   9: 1 op, 270.00 ns, 270.0000 ns/op
OverheadActual  10: 1 op, 310.00 ns, 310.0000 ns/op
OverheadActual  11: 1 op, 301.00 ns, 301.0000 ns/op
OverheadActual  12: 1 op, 310.00 ns, 310.0000 ns/op
OverheadActual  13: 1 op, 291.00 ns, 291.0000 ns/op
OverheadActual  14: 1 op, 431.00 ns, 431.0000 ns/op
OverheadActual  15: 1 op, 300.00 ns, 300.0000 ns/op
OverheadActual  16: 1 op, 301.00 ns, 301.0000 ns/op
OverheadActual  17: 1 op, 301.00 ns, 301.0000 ns/op
OverheadActual  18: 1 op, 311.00 ns, 311.0000 ns/op
OverheadActual  19: 1 op, 280.00 ns, 280.0000 ns/op
OverheadActual  20: 1 op, 301.00 ns, 301.0000 ns/op

WorkloadWarmup   1: 1 op, 344035322.00 ns, 344.0353 ms/op
WorkloadWarmup   2: 1 op, 344050801.00 ns, 344.0508 ms/op
WorkloadWarmup   3: 1 op, 343603391.00 ns, 343.6034 ms/op
WorkloadWarmup   4: 1 op, 343314428.00 ns, 343.3144 ms/op
WorkloadWarmup   5: 1 op, 343937818.00 ns, 343.9378 ms/op
WorkloadWarmup   6: 1 op, 343723487.00 ns, 343.7235 ms/op
WorkloadWarmup   7: 1 op, 343860023.00 ns, 343.8600 ms/op
WorkloadWarmup   8: 1 op, 344658031.00 ns, 344.6580 ms/op
WorkloadWarmup   9: 1 op, 343601116.00 ns, 343.6011 ms/op
WorkloadWarmup  10: 1 op, 344177790.00 ns, 344.1778 ms/op
WorkloadWarmup  11: 1 op, 343846869.00 ns, 343.8469 ms/op
WorkloadWarmup  12: 1 op, 343745467.00 ns, 343.7455 ms/op
WorkloadWarmup  13: 1 op, 344116454.00 ns, 344.1165 ms/op
WorkloadWarmup  14: 1 op, 343456305.00 ns, 343.4563 ms/op
WorkloadWarmup  15: 1 op, 349946902.00 ns, 349.9469 ms/op
WorkloadWarmup  16: 1 op, 344082902.00 ns, 344.0829 ms/op
WorkloadWarmup  17: 1 op, 343845786.00 ns, 343.8458 ms/op
WorkloadWarmup  18: 1 op, 344012839.00 ns, 344.0128 ms/op
WorkloadWarmup  19: 1 op, 344170877.00 ns, 344.1709 ms/op
WorkloadWarmup  20: 1 op, 343575379.00 ns, 343.5754 ms/op
WorkloadWarmup  21: 1 op, 343845987.00 ns, 343.8460 ms/op
WorkloadWarmup  22: 1 op, 344143345.00 ns, 344.1433 ms/op
WorkloadWarmup  23: 1 op, 343277559.00 ns, 343.2776 ms/op
WorkloadWarmup  24: 1 op, 343349223.00 ns, 343.3492 ms/op
WorkloadWarmup  25: 1 op, 343759624.00 ns, 343.7596 ms/op
WorkloadWarmup  26: 1 op, 343311343.00 ns, 343.3113 ms/op
WorkloadWarmup  27: 1 op, 344087791.00 ns, 344.0878 ms/op
WorkloadWarmup  28: 1 op, 343184133.00 ns, 343.1841 ms/op
WorkloadWarmup  29: 1 op, 343740919.00 ns, 343.7409 ms/op
WorkloadWarmup  30: 1 op, 343775495.00 ns, 343.7755 ms/op

// BeforeActualRun
WorkloadActual   1: 1 op, 101812199.00 ns, 101.8122 ms/op
WorkloadActual   2: 1 op, 101484203.00 ns, 101.4842 ms/op
WorkloadActual   3: 1 op, 101602786.00 ns, 101.6028 ms/op
WorkloadActual   4: 1 op, 101630187.00 ns, 101.6302 ms/op
WorkloadActual   5: 1 op, 101544015.00 ns, 101.5440 ms/op
WorkloadActual   6: 1 op, 102240493.00 ns, 102.2405 ms/op
WorkloadActual   7: 1 op, 106122682.00 ns, 106.1227 ms/op
WorkloadActual   8: 1 op, 101842245.00 ns, 101.8422 ms/op
WorkloadActual   9: 1 op, 101567580.00 ns, 101.5676 ms/op
WorkloadActual  10: 1 op, 101741647.00 ns, 101.7416 ms/op
WorkloadActual  11: 1 op, 101557050.00 ns, 101.5571 ms/op
WorkloadActual  12: 1 op, 101644604.00 ns, 101.6446 ms/op
WorkloadActual  13: 1 op, 101423349.00 ns, 101.4233 ms/op
WorkloadActual  14: 1 op, 101485115.00 ns, 101.4851 ms/op
WorkloadActual  15: 1 op, 101579452.00 ns, 101.5795 ms/op

// AfterActualRun
WorkloadResult   1: 1 op, 101811893.50 ns, 101.8119 ms/op
WorkloadResult   2: 1 op, 101483897.50 ns, 101.4839 ms/op
WorkloadResult   3: 1 op, 101602480.50 ns, 101.6025 ms/op
WorkloadResult   4: 1 op, 101629881.50 ns, 101.6299 ms/op
WorkloadResult   5: 1 op, 101543709.50 ns, 101.5437 ms/op
WorkloadResult   6: 1 op, 101841939.50 ns, 101.8419 ms/op
WorkloadResult   7: 1 op, 101567274.50 ns, 101.5673 ms/op
WorkloadResult   8: 1 op, 101741341.50 ns, 101.7413 ms/op
WorkloadResult   9: 1 op, 101556744.50 ns, 101.5567 ms/op
WorkloadResult  10: 1 op, 101644298.50 ns, 101.6443 ms/op
WorkloadResult  11: 1 op, 101423043.50 ns, 101.4230 ms/op
WorkloadResult  12: 1 op, 101484809.50 ns, 101.4848 ms/op
WorkloadResult  13: 1 op, 101579146.50 ns, 101.5791 ms/op
GC:  0 0 0 816 1
Threading:  0 0 1

// AfterAll
Unhandled exception. System.NotSupportedException: Unknown Acknowledgment:
   at BenchmarkDotNet.Engines.ConsoleHost.SendSignal(HostSignal hostSignal)
   at BenchmarkDotNet.Engines.HostExtensions.AfterAll(IHost host)
   at BenchmarkDotNet.Autogenerated.UniqueProgramName.AfterAssemblyLoadingAttached(String[] args) in /dndev/dotnet/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/d47ffc72-284c-4d46-8998-a427812b9b90/d47ffc72-284c-4d46-8998-a427812b9b90.notcs:line 83
   at BenchmarkDotNet.Autogenerated.UniqueProgramName.Main(String[] args) in /dndev/dotnet/performance/artifacts/bin/MicroBenchmarks/Release/net7.0/d47ffc72-284c-4d46-8998-a427812b9b90/d47ffc72-284c-4d46-8998-a427812b9b90.notcs:line 22
root@c6ce80843d94:/dndev/dotnet/performance/src/benchmarks/micro#

[MichalPetryka]

I'm getting this with DisassemblyDiagnoser with a .Net 7 corerun on Ubuntu 20.04:

Unhandled exception. Microsoft.Diagnostics.Runtime.ClrDiagnosticsException: Could not request common MethodTable list.
   at Microsoft.Diagnostics.Runtime.Desktop.V45Runtime..ctor(ClrInfo info, DataTarget dt, DacLibrary lib)
   at Microsoft.Diagnostics.Runtime.DataTarget.ConstructRuntime(ClrInfo clrInfo, String dac)
   at Microsoft.Diagnostics.Runtime.DataTarget.CreateRuntime(ClrInfo clrInfo)
   at Microsoft.Diagnostics.Runtime.ClrInfo.CreateRuntime()
   at BenchmarkDotNet.Disassemblers.ClrMdDisassembler.AttachAndDisassemble(Settings settings)
   at BenchmarkDotNet.Disassemblers.LinuxDisassembler.Disassemble(DiagnoserActionParameters parameters)
   at BenchmarkDotNet.Diagnosers.DisassemblyDiagnoser.Handle(HostSignal signal, DiagnoserActionParameters parameters)
   at BenchmarkDotNet.Diagnosers.CompositeDiagnoser.Handle(HostSignal signal, DiagnoserActionParameters parameters)
   at BenchmarkDotNet.Loggers.SynchronousProcessOutputLoggerWithDiagnoser.ProcessInput()
   at BenchmarkDotNet.Toolchains.DotNetCli.DotNetCliExecutor.Execute(BenchmarkCase benchmarkCase, BenchmarkId benchmarkId, ILogger logger, ArtifactsPaths artifactsPaths, IDiagnoser diagnoser, String executableName, IResolver resolver, Int32 launchIndex, Boolean noAcknowledgments)
   at BenchmarkDotNet.Toolchains.DotNetCli.DotNetCliExecutor.Execute(ExecuteParameters executeParameters)
   at BenchmarkDotNet.Running.BenchmarkRunnerClean.RunExecute(ILogger logger, BenchmarkCase benchmarkCase, BenchmarkId benchmarkId, IToolchain toolchain, BuildResult buildResult, IResolver resolver, IDiagnoser diagnoser, Int32 launchIndex)
   at BenchmarkDotNet.Running.BenchmarkRunnerClean.Execute(ILogger logger, BenchmarkCase benchmarkCase, BenchmarkId benchmarkId, IToolchain toolchain, BuildResult buildResult, IResolver resolver)
   at BenchmarkDotNet.Running.BenchmarkRunnerClean.RunCore(BenchmarkCase benchmarkCase, BenchmarkId benchmarkId, ILogger logger, IResolver resolver, BuildResult buildResult)
   at BenchmarkDotNet.Running.BenchmarkRunnerClean.Run(BenchmarkRunInfo benchmarkRunInfo, Dictionary`2 buildResults, IResolver resolver, ILogger logger, List`1 artifactsToCleanup, String resultsFolderPath, String logFilePath, Int32 totalBenchmarkCount, StartedClock& runsChronometer, Int32& benchmarksToRunCount)
   at BenchmarkDotNet.Running.BenchmarkRunnerClean.Run(BenchmarkRunInfo[] benchmarkRunInfos)
   at BenchmarkDotNet.Running.BenchmarkSwitcher.RunWithDirtyAssemblyResolveHelper(String[] args, IConfig config, Boolean askUserForInput)
   at BenchmarkDotNet.Running.BenchmarkSwitcher.Run(String[] args, IConfig config)
   at ConsoleApp37.Program.Main(String[] args) in /media/ewa/PENDRIVE/ConsoleApp37/ConsoleApp37/Program.cs:line 19
Unhandled exception. System.NotSupportedException: Unknown Acknowledgment: 
   at BenchmarkDotNet.Engines.ConsoleHost.SendSignal(HostSignal hostSignal)
   at BenchmarkDotNet.Engines.HostExtensions.AfterAll(IHost host)
   at BenchmarkDotNet.Autogenerated.UniqueProgramName.AfterAssemblyLoadingAttached(String[] args) in /media/ewa/PENDRIVE/ConsoleApp37/ConsoleApp37/bin/Release/net6.0/cfb2f660-17e6-40e0-bac2-e104762d56d9/cfb2f660-17e6-40e0-bac2-e104762d56d9.notcs:line 83
   at BenchmarkDotNet.Autogenerated.UniqueProgramName.Main(String[] args) in /media/ewa/PENDRIVE/ConsoleApp37/ConsoleApp37/bin/Release/net6.0/cfb2f660-17e6-40e0-bac2-e104762d56d9/cfb2f660-17e6-40e0-bac2-e104762d56d9.notcs:line 22

[adamsitnik]

Hi @jakobbotsch @MichalPetryka

I've ported BenchmarkDotNet from ClrMd v1 to v2: #2040

Could you please try our 0.13.1.1811 preview package from the CI feed and see if it helped?

https://benchmarkdotnet.org/articles/guides/nuget.html#nightly

<packageSources>
  <add key="bdn-ci" value="https://ci.appveyor.com/nuget/benchmarkdotnet" />
</packageSources>

[MichalPetryka]

@adamsitnik
I've tried the new version, on a simple project with 10 benchmarks, the new version worked seemingly fine for the first four (no errors), but on the 5th one it crashed with the Unknown Acknowledgment exception, the first exception didn't happen though. I've tried two times, both did the same thing.

[adamsitnik]

@jakobbotsch @MichalPetryka thank you both for confirmation!

[MichalPetryka]

@adamsitnik Why did you close this? Like I said on the 5th one it crashed with the Unknown Acknowledgment exception, so the issue doesn't seem solved to me.

[adamsitnik]

@MichalPetryka because it's a different issue (here it was ClrMd v1 bug). Please report a new bug and provide output of the following commands:

printenv TERM
printenv LC_ALL
printenv LC_MESSAGES
printenv LANG

(I need to know what Terminal are you using and what Encoding as the bug is about encoding and decoding strings sent via stdin/out between host and benchmark process)