Inliner: Extend IL limit for profiled call-sites, allow inlining for switches. #55478

EgorBo · 2021-07-11T20:12:02Z

This PR:

Extends IL limit for methods with profile data
Removes the Amount-of-BBs-limit
Recognizes "x isinst/cast" as foldable when x is exact (we know its exact class)
Enables inlining for methods with foldable switch (closes JIT: Methods with switches aren't inlineable #55336) - these used to be non-inlineable always.

As the result - it significantly improves several TE benchmarks in FullPGO mode (will post the results for all of the TE benchmarks later):

SPC's R2R size with --Ot: 10.35Mb, +0.9% size increase (it's 10.42Mb in Main).
SPC's R2R size with -O (default mode): 9.93Mb

…iner-3

AndyAyersMS

Do we see any switches getting inlined in the P0/P1 tests? If not, consider adding some test cases for them.

Also we might want to enhance jit stress to explore some of these same new inlining capabilities.

Otherwise LGTM.

AndyAyersMS · 2021-07-12T16:18:39Z

src/coreclr/jit/fgprofile.cpp

+
+    if ((fgFirstBB != nullptr) && (fgPgoSource == ICorJitInfo::PgoSource::Static))
+    {
+        const BasicBlock::weight_t sufficientSamples = 5000;


This used to be 1000 -- I assume you're increasing this to keep prejit image size small?

If so, you should add a comment describing how this value influences prejit size.
If not, you might comment on what the impact of changing this would be.

1000 samples feels like a plenty of evidence that something is hot.

Reverted to 1000. Yes, this changes was supposed to decrease the prejitted size, I was using this histogram:

(weights in SPC, the right column starts at 50000).

However, I don't need to save some space with it anymore as I've found an unrelated issue that bloated size for no reason (binary expressions like "arg op cns" used to leave "cns" on top of the pushed stack so there were lots of false-positive foldable-branches/switches).

EgorBo · 2021-07-12T20:18:02Z

Do we see any switches getting inlined in the P0/P1 tests? If not, consider adding some test cases for them.

Not sure about the runtime tests yet (will check), but jit-diff (-f --pmi) for Libs found 145 methods:

Found 293 files with textual diffs.

PMI CodeSize Diffs for System.Private.CoreLib.dll, framework assemblies for  default jit

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 60195858
Total bytes of diff: 60190743
Total bytes of delta: -5115 (-0.01% of base)
Total relative delta: 8.65
    diff is an improvement.
    relative diff is a regression.


Top file regressions (bytes):
         156 : System.Security.Cryptography.Algorithms.dasm (0.04% of base)
         143 : System.Security.Cryptography.Pkcs.dasm (0.03% of base)
         129 : System.Drawing.Common.dasm (0.03% of base)
         118 : System.Speech.dasm (0.03% of base)
          33 : ILCompiler.TypeSystem.ReadyToRun.dasm (0.01% of base)
          19 : System.Private.CoreLib.dasm (0.00% of base)

Top file improvements (bytes):
       -3901 : Microsoft.CodeAnalysis.CSharp.dasm (-0.08% of base)
        -666 : System.Private.Xml.dasm (-0.02% of base)
        -229 : System.Diagnostics.Process.dasm (-0.23% of base)
        -214 : Microsoft.CodeAnalysis.VisualBasic.dasm (-0.00% of base)
        -180 : System.Reflection.Metadata.dasm (-0.03% of base)
        -159 : System.Diagnostics.DiagnosticSource.dasm (-0.09% of base)
         -86 : Microsoft.Extensions.FileProviders.Physical.dasm (-0.46% of base)
         -78 : System.Resources.Extensions.dasm (-0.22% of base)
         -75 : System.Data.Common.dasm (-0.00% of base)
         -43 : System.Configuration.ConfigurationManager.dasm (-0.01% of base)
         -32 : Microsoft.Extensions.Primitives.dasm (-0.12% of base)
         -30 : Microsoft.Extensions.Logging.dasm (-0.10% of base)
         -20 : System.Net.HttpListener.dasm (-0.01% of base)

19 total files with Code Size differences (13 improved, 6 regressed), 254 unchanged.

Top method regressions (bytes):
         288 (51.06% of base) : Microsoft.CodeAnalysis.CSharp.dasm - LanguageParser:ParseComplexElementInitializer():InitializerExpressionSyntax:this
         282 (93.38% of base) : Microsoft.CodeAnalysis.CSharp.dasm - LanguageParser:ParseObjectInitializerNamedAssignment():ExpressionSyntax:this
         279 (85.85% of base) : Microsoft.CodeAnalysis.CSharp.dasm - LanguageParser:ParseDictionaryInitializer():ExpressionSyntax:this
         233 (57.53% of base) : System.Private.CoreLib.dasm - TimeSpanParse:TryParseTimeSpan(ReadOnlySpan`1,ubyte,IFormatProvider,byref):bool
          78 (600.00% of base) : System.Security.Cryptography.Pkcs.dasm - CmsRecipient:.ctor(X509Certificate2):this
          65 (52.42% of base) : System.Security.Cryptography.Pkcs.dasm - CmsRecipient:.ctor(X509Certificate2,RSAEncryptionPadding):this
          60 (142.86% of base) : System.Drawing.Common.dasm - FontFamily:get_GenericSerif():FontFamily
          57 (126.67% of base) : System.Drawing.Common.dasm - FontFamily:get_GenericMonospace():FontFamily
          51 (22.27% of base) : System.Private.CoreLib.dasm - TimeSpanParse:ProcessTerminalState(byref,ubyte,byref):bool
          48 (15.74% of base) : System.Private.CoreLib.dasm - CalendarData:LoadCalendarDataFromSystemCore(String,ushort):bool:this
          39 ( 7.75% of base) : System.Security.Cryptography.Algorithms.dasm - DesImplementation:TryDecryptEcbCore(ReadOnlySpan`1,Span`1,int,byref):bool:this
          39 ( 7.75% of base) : System.Security.Cryptography.Algorithms.dasm - DesImplementation:TryEncryptEcbCore(ReadOnlySpan`1,Span`1,int,byref):bool:this
          39 ( 6.84% of base) : System.Security.Cryptography.Algorithms.dasm - DesImplementation:TryEncryptCbcCore(ReadOnlySpan`1,ReadOnlySpan`1,Span`1,int,byref):bool:this
          39 ( 6.84% of base) : System.Security.Cryptography.Algorithms.dasm - DesImplementation:TryDecryptCbcCore(ReadOnlySpan`1,ReadOnlySpan`1,Span`1,int,byref):bool:this
          39 ( 5.87% of base) : System.Private.CoreLib.dasm - CalendarData:NlsLoadCalendarDataFromSystem(String,ushort):bool:this
          33 ( 3.31% of base) : ILCompiler.TypeSystem.ReadyToRun.dasm - MetadataExtensions:GetDelegatePInvokeFlags(EcmaType):PInvokeFlags
          30 (115.38% of base) : System.Configuration.ConfigurationManager.dasm - ConfigurationSchemaErrors:SetSingleGlobalError(ConfigurationException):this
          25 ( 5.76% of base) : System.Speech.dasm - SemanticResultKey:.ctor(String,ref):this (2 methods)
          21 ( 4.07% of base) : System.Speech.dasm - Choices:Add(ref):this (2 methods)
          20 ( 0.92% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SourceAssemblySymbol:DetectAttributeAndOptionConflicts(DiagnosticBag):this

Top method improvements (bytes):
        -500 (-6.91% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:VisitMethod(IMethodSymbol):this
        -336 (-10.60% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddTypeParameterConstraints(ImmutableArray`1):this
        -252 (-11.50% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:VisitProperty(IPropertySymbol):this
        -252 (-9.21% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddNameAndTypeArgumentsOrParameters(INamedTypeSymbol):this
        -233 (-8.83% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:VisitParameter(IParameterSymbol):this
        -228 (-20.05% of base) : Microsoft.CodeAnalysis.VisualBasic.dasm - SourceNamedTypeSymbol:AddSyntheticMyGroupCollectionProperty(NamedTypeSymbol,bool,String,String,String,MembersAndInitializersBuilder,Binder,AttributeSyntax,DiagnosticBag):this
        -216 (-13.22% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddAccessibilityIfRequired(ISymbol):this
        -216 (-12.04% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddMemberModifiersIfRequired(ISymbol):this
        -216 (-12.54% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddArrayRank(IArrayTypeSymbol):this
        -199 (-8.56% of base) : System.Diagnostics.Process.dasm - NtProcessManager:GetProcessInfos(PerformanceCounterLib,int,int,ReadOnlySpan`1):ref
        -180 (-15.54% of base) : System.Reflection.Metadata.dasm - MetadataAggregator:CalculateHeapSizes(IReadOnlyList`1,IReadOnlyList`1):ImmutableArray`1
        -177 (-12.29% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddParametersIfRequired(bool,bool,ImmutableArray`1):this
        -175 (-43.21% of base) : System.Private.Xml.dasm - OptimizerPatterns:Inherit(QilNode,QilNode,int)
        -160 (-10.65% of base) : System.Private.CoreLib.dasm - Directory:Move(String,String)
        -144 (-7.64% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:VisitNamedType(INamedTypeSymbol):this
        -144 (-11.65% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddConstantValue(ITypeSymbol,Object,bool):this
        -144 (-10.88% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:MinimallyQualify(INamedTypeSymbol):this
        -142 (-10.08% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddPropertyNameAndParameters(IPropertySymbol):this
        -118 (-9.56% of base) : System.Diagnostics.DiagnosticSource.dasm - FilterAndTransform:AddNewActivitySourceTransform(String,int,int,DiagnosticSourceEventSource)
        -111 (-7.27% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddCustomModifiersIfRequired(ImmutableArray`1,bool,bool):this

Top method regressions (percentages):
          78 (600.00% of base) : System.Security.Cryptography.Pkcs.dasm - CmsRecipient:.ctor(X509Certificate2):this
          60 (142.86% of base) : System.Drawing.Common.dasm - FontFamily:get_GenericSerif():FontFamily
          19 (135.71% of base) : System.Speech.dasm - GrammarBuilderPhrase:.ctor(String):this
          57 (126.67% of base) : System.Drawing.Common.dasm - FontFamily:get_GenericMonospace():FontFamily
          30 (115.38% of base) : System.Configuration.ConfigurationManager.dasm - ConfigurationSchemaErrors:SetSingleGlobalError(ConfigurationException):this
         282 (93.38% of base) : Microsoft.CodeAnalysis.CSharp.dasm - LanguageParser:ParseObjectInitializerNamedAssignment():ExpressionSyntax:this
         279 (85.85% of base) : Microsoft.CodeAnalysis.CSharp.dasm - LanguageParser:ParseDictionaryInitializer():ExpressionSyntax:this
         233 (57.53% of base) : System.Private.CoreLib.dasm - TimeSpanParse:TryParseTimeSpan(ReadOnlySpan`1,ubyte,IFormatProvider,byref):bool
          65 (52.42% of base) : System.Security.Cryptography.Pkcs.dasm - CmsRecipient:.ctor(X509Certificate2,RSAEncryptionPadding):this
         288 (51.06% of base) : Microsoft.CodeAnalysis.CSharp.dasm - LanguageParser:ParseComplexElementInitializer():InitializerExpressionSyntax:this
          51 (22.27% of base) : System.Private.CoreLib.dasm - TimeSpanParse:ProcessTerminalState(byref,ubyte,byref):bool
          12 (18.18% of base) : System.Resources.Extensions.dasm - TypeNameComparer:IsMscorlib(ReadOnlySpan`1):bool
          48 (15.74% of base) : System.Private.CoreLib.dasm - CalendarData:LoadCalendarDataFromSystemCore(String,ushort):bool:this
          10 ( 8.85% of base) : System.Speech.dasm - BuilderElements:Add(String):this
          10 ( 8.00% of base) : System.Speech.dasm - SemanticKeyElement:Add(String):this
          39 ( 7.75% of base) : System.Security.Cryptography.Algorithms.dasm - DesImplementation:TryDecryptEcbCore(ReadOnlySpan`1,Span`1,int,byref):bool:this
          39 ( 7.75% of base) : System.Security.Cryptography.Algorithms.dasm - DesImplementation:TryEncryptEcbCore(ReadOnlySpan`1,Span`1,int,byref):bool:this
          39 ( 6.84% of base) : System.Security.Cryptography.Algorithms.dasm - DesImplementation:TryEncryptCbcCore(ReadOnlySpan`1,ReadOnlySpan`1,Span`1,int,byref):bool:this
          39 ( 6.84% of base) : System.Security.Cryptography.Algorithms.dasm - DesImplementation:TryDecryptCbcCore(ReadOnlySpan`1,ReadOnlySpan`1,Span`1,int,byref):bool:this
          39 ( 5.87% of base) : System.Private.CoreLib.dasm - CalendarData:NlsLoadCalendarDataFromSystem(String,ushort):bool:this

Top method improvements (percentages):
        -175 (-43.21% of base) : System.Private.Xml.dasm - OptimizerPatterns:Inherit(QilNode,QilNode,int)
        -228 (-20.05% of base) : Microsoft.CodeAnalysis.VisualBasic.dasm - SourceNamedTypeSymbol:AddSyntheticMyGroupCollectionProperty(NamedTypeSymbol,bool,String,String,String,MembersAndInitializersBuilder,Binder,AttributeSyntax,DiagnosticBag):this
        -180 (-15.54% of base) : System.Reflection.Metadata.dasm - MetadataAggregator:CalculateHeapSizes(IReadOnlyList`1,IReadOnlyList`1):ImmutableArray`1
         -13 (-15.29% of base) : System.Private.Xml.dasm - XmlILOptimizerVisitor:IsStepPattern(OptimizerPatterns,int):bool:this
         -36 (-15.19% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddSpace():this
         -39 (-15.12% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddPunctuation(ushort):this
         -39 (-15.12% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddKeyword(ushort):this
         -39 (-15.00% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddBitwiseOr():this
         -39 (-14.34% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:VisitModule(IModuleSymbol):this
         -39 (-14.34% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:VisitLabel(ILabelSymbol):this
         -39 (-14.34% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:VisitDynamicType(IDynamicTypeSymbol):this
        -106 (-13.49% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddGlobalNamespace(INamespaceSymbol):this
        -216 (-13.22% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddAccessibilityIfRequired(ISymbol):this
         -36 (-12.86% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddSpecialTypeKeyword(INamedTypeSymbol):bool:this
         -72 (-12.79% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddAccessor(ISymbol,IMethodSymbol,ushort):this
        -108 (-12.54% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddFieldModifiersIfRequired(IFieldSymbol):this
        -216 (-12.54% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddArrayRank(IArrayTypeSymbol):this
         -72 (-12.50% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddTypeParameterVarianceIfRequired(ITypeParameterSymbol):this
         -72 (-12.41% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:VisitRangeVariable(IRangeVariableSymbol):this
        -177 (-12.29% of base) : Microsoft.CodeAnalysis.CSharp.dasm - SymbolDisplayVisitor:AddParametersIfRequired(bool,bool,ImmutableArray`1):this

145 total methods with Code Size differences (105 improved, 40 regressed), 275333 unchanged.

Diff is negative! for a change that supposed to inline more methods than in the baseline.

…it produced many false-positive foldable switches/branches.

…nto jit-inliner-3

…iner-3

EgorBo · 2021-07-13T15:58:38Z

One more note regarding switches - runtime tests have several hundreds of them including foldable ones. But even non-foldable can be inlined in the stress mode, because we apply additional +10 multiplier in that mode.
There was a small debug-only issue with inlined switches because fgBBNumMax was not updated correctly but I fixed it (JitDump used to assert somewhere in m_switchDescMap)

…debugger_custom_views * 'main' of github.com:thaystg/runtime: (125 commits) [wasm] [debugger] Support method calls (dotnet#55458) [debugger] Fix debugging after hot reloading (dotnet#55599) Inliner: Extend IL limit for profiled call-sites, allow inlining for switches. (dotnet#55478) DiagnosticSourceEventSource supports base class properties (dotnet#55613) [mono] Fix race during mono_image_storage_open (dotnet#55201) [mono] Add wrapper info for native func wrappers. (dotnet#55602) H/3 and Quic AppContext switch (dotnet#55332) Compression.ZipFile support for Unix Permissions (dotnet#55531) [mono] Fix skipping of static methods during IMT table construction. (dotnet#55610) Combine System.Private.Xml TrimmingTests projects (dotnet#55606) fix name conflict with Configuration class (dotnet#55597) Finish migrating RSAOpenSsl from RSA* to EVP_PKEY* Disable generic math (dotnet#55540) Obsolete CryptoConfig.EncodeOID (dotnet#55592) Address System.Net.Http.WinHttpHandler's nullable warnings targeting .NETCoreApp (dotnet#54995) Enable Http2_MultipleConnectionsEnabled_ConnectionLimitNotReached_ConcurrentRequestsSuccessfullyHandled (dotnet#55572) Fix Task.WhenAny failure mode when passed ICollection of zero tasks (dotnet#55580) Consume DistributedContextPropagator in DiagnosticsHandler (dotnet#55392) Add property ordering feature (dotnet#55586) Reduce subtest count in Reflection (dotnet#55537) ...

EgorBo added 4 commits July 10, 2021 13:31

Improve Inliner, vol.3

d711b0f

Merge branch 'main' of https://github.com/dotnet/runtime into jit-inl…

42dcb3d

…iner-3

Improvements

154bd99

Tuning.

6dd92ca

dotnet-issue-labeler bot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Jul 11, 2021

EgorBo added 10 commits July 12, 2021 01:30

Fix asserts

4cb8387

Clean up

8117d8f

Fix assert

5a3effa

Merge branch 'main' of https://github.com/dotnet/runtime into jit-inl…

36f91ad

…iner-3

Tuning.

40588ff

add missing break;

e19f79f

Tuning for size.

2240f34

Tuning.

d8f4c45

Formatting

f6e7c13

Tuning.

970a2cd

EgorBo marked this pull request as ready for review July 12, 2021 13:14

Revert some changes

a7ecdf6

EgorBo mentioned this pull request Jul 12, 2021

PGO Inlining Policy #43914

Closed

AndyAyersMS approved these changes Jul 12, 2021

View reviewed changes

EgorBo added 4 commits July 12, 2021 23:31

Fix cases where "arg op cns" left "cns" on top of the pushedstack -- …

db0f3bc

…it produced many false-positive foldable switches/branches.

Merge branch 'jit-inliner-3' of https://github.com/EgorBo/runtime-1 i…

d2bbe6d

…nto jit-inliner-3

Merge branch 'main' of https://github.com/dotnet/runtime into jit-inl…

a382443

…iner-3

Fix an assert when we import a switch (in jitdump mode)

4d0bf98

runfoapp bot mentioned this pull request Jul 13, 2021

system.linq.expressions.tests work item #55546

Closed

Disable over-ILsize for generic static pgo

e948d10

EgorBo force-pushed the jit-inliner-3 branch from 98ac4fa to e948d10 Compare July 13, 2021 13:43

Update fgbasic.cpp

ab9f542

runfoapp bot mentioned this pull request Jul 13, 2021

system.net.quic.tests.msquictests.bytemixingornativeave_minimalfailingtest times out on Fedora #55588

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runfoapp bot mentioned this pull request Jul 13, 2021

system.net.http.functional.tests.socketshttphandlertest_http2 test failure for Linux-x64 #55590

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EgorBo merged commit 21e36e8 into dotnet:main Jul 14, 2021

runfoapp bot mentioned this pull request Jul 15, 2021

System.Net.Requests.Tests failing with a crash #55714

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This was referenced Jul 20, 2021

[Perf] Changes at 7/13/2021 3:02:43 PM DrewScoggins/performance-2#7500

Open

[Perf] Changes at 7/14/2021 12:34:26 AM DrewScoggins/performance-2#7503

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[Perf] Changes at 7/14/2021 11:01:14 AM DrewScoggins/performance-2#7504

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ManickaP mentioned this pull request Jul 20, 2021

[QUIC] Remove AppContext switch from S.N.Quic #56027

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kunalspathak mentioned this pull request Jul 22, 2021

[Perf] Changes at 7/14/2021 1:12:09 PM DrewScoggins/performance-2#7614

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EgorBo mentioned this pull request Jul 27, 2021

[Perf] Regressions from inliner changes #56012

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JulieLeeMSFT mentioned this pull request Aug 10, 2021

What's new in .NET 6 Preview 7 dotnet/core#6444

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Inliner: Extend IL limit for profiled call-sites, allow inlining for switches. #55478

Inliner: Extend IL limit for profiled call-sites, allow inlining for switches. #55478

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EgorBo commented Jul 13, 2021

Inliner: Extend IL limit for profiled call-sites, allow inlining for switches. #55478

Inliner: Extend IL limit for profiled call-sites, allow inlining for switches. #55478

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