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clang-p2996/llvm/test/Transforms/SampleProfile/pseudo-probe-profile-mismatch.ll
Lei Wang c98da372cb [CSSPGO] Compute and report profile matching recovered callsites and samples (#79090) 
This change adds the support to compute and report the staleness metrics
after stale profile matching so that we can know how effective the fuzzy
matching is, i. e. how many callsites and samples are recovered by the
matching.
Some implementation notes:
- The function checksum mismatch metrics are not applicable here as it's
function-level metrics, checksum mismatch remains the same before and
after matching, so we need to compute based on the callsite samples.
- Added two new counters `NumRecoveredCallsites`,
`RecoveredCallsiteSamples` for this and removed `TotalCallsiteSamples`
as now the we can use the `TotalFuncHashSamples` as base, and renamed
some counters.
- In profile matching, we changed to use a state machine to represent
the callsite's matching state changes. See the `MatchState` for the
state, and used a new function `recordCallsiteMatchStates` to compute
and record the callsite's match states changes before and after the
matching, , the result is compressed and saved into a
`FuncCallsiteMatchStates` map for later counting use.
- Changed the counting function to run on module-level and moved it to
the end of the whole process(`computeAndReportProfileStaleness`). The
reason is before the callsite is only counted on top-level function,
this change extends it to count(recursively) on the inlined functions
and samples, which is more accurate.
2024-02-19 11:36:20 -08:00

290 lines
15 KiB
LLVM
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; REQUIRES: x86_64-linux
; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/pseudo-probe-profile-mismatch.prof -report-profile-staleness -persist-profile-staleness -S 2>%t -o %t.ll
; RUN: FileCheck %s --input-file %t
; RUN: FileCheck %s --input-file %t.ll -check-prefix=CHECK-MD
; RUN: llc < %t.ll -filetype=obj -o %t.obj
; RUN: llvm-objdump --section-headers %t.obj | FileCheck %s --check-prefix=CHECK-OBJ
; RUN: llc < %t.ll -filetype=asm -o - | FileCheck %s --check-prefix=CHECK-ASM
; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/pseudo-probe-profile-mismatch-nested.prof -report-profile-staleness -persist-profile-staleness -S 2>&1 | FileCheck %s --check-prefix=CHECK-NESTED
; CHECK: (2/3) of functions' profile are invalid and (40/50) of samples are discarded due to function hash mismatch.
; CHECK: (2/3) of callsites' profile are invalid and (20/50) of samples are discarded due to callsite location mismatch.
; CHECK: (1/2) of callsites and (10/20) of samples are recovered by stale profile matching.
; CHECK-MD: ![[#]] = !{!"NumStaleProfileFunc", i64 2, !"TotalProfiledFunc", i64 3, !"MismatchedFunctionSamples", i64 40, !"TotalFunctionSamples", i64 50, !"NumMismatchedCallsites", i64 1, !"NumRecoveredCallsites", i64 1, !"TotalProfiledCallsites", i64 3, !"MismatchedCallsiteSamples", i64 10, !"RecoveredCallsiteSamples", i64 10}
; CHECK-OBJ: .llvm_stats
; CHECK-ASM: .section .llvm_stats,"",@progbits
; CHECK-ASM: .byte 19
; CHECK-ASM: .ascii "NumStaleProfileFunc"
; CHECK-ASM: .byte 4
; CHECK-ASM: .ascii "Mg=="
; CHECK-ASM: .byte 17
; CHECK-ASM: .ascii "TotalProfiledFunc"
; CHECK-ASM: .byte 4
; CHECK-ASM: .ascii "Mw=="
; CHECK-ASM: .byte 25
; CHECK-ASM: .ascii "MismatchedFunctionSamples"
; CHECK-ASM: .byte 4
; CHECK-ASM: .ascii "NDA="
; CHECK-ASM: .byte 20
; CHECK-ASM: .ascii "TotalFunctionSamples"
; CHECK-ASM: .byte 4
; CHECK-ASM: .ascii "NTA="
; CHECK-ASM: .byte 22
; CHECK-ASM: .ascii "NumMismatchedCallsites"
; CHECK-ASM: .byte 4
; CHECK-ASM: .ascii "MQ=="
; CHECK-ASM: .byte 21
; CHECK-ASM: .ascii "NumRecoveredCallsites"
; CHECK-ASM: .byte 4
; CHECK-ASM: .ascii "MQ=="
; CHECK-ASM: .byte 22
; CHECK-ASM: .ascii "TotalProfiledCallsites"
; CHECK-ASM: .byte 4
; CHECK-ASM: .ascii "Mw=="
; CHECK-ASM: .byte 25
; CHECK-ASM: .ascii "MismatchedCallsiteSamples"
; CHECK-ASM: .byte 4
; CHECK-ASM: .ascii "MTA="
; CHECK-ASM: .byte 24
; CHECK-ASM: .ascii "RecoveredCallsiteSamples"
; CHECK-ASM: .byte 4
; CHECK-ASM: .ascii "MTA="
; CHECK-NESTED: (1/2) of functions' profile are invalid and (211/311) of samples are discarded due to function hash mismatch.
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@x = dso_local global i32 0, align 4, !dbg !0
; Function Attrs: nounwind uwtable
define dso_local i32 @foo(i32 noundef %x) #0 !dbg !16 {
entry:
%y = alloca i32, align 4
call void @llvm.dbg.value(metadata i32 %x, metadata !20, metadata !DIExpression()), !dbg !22
call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %y), !dbg !23
call void @llvm.dbg.declare(metadata ptr %y, metadata !21, metadata !DIExpression()), !dbg !24
call void @llvm.pseudoprobe(i64 6699318081062747564, i64 1, i32 0, i64 -1), !dbg !25
%add = add nsw i32 %x, 1, !dbg !26
store volatile i32 %add, ptr %y, align 4, !dbg !24, !tbaa !27
%y.0. = load volatile i32, ptr %y, align 4, !dbg !31, !tbaa !27
%add1 = add nsw i32 %y.0., 1, !dbg !32
call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %y), !dbg !33
ret i32 %add1, !dbg !34
}
; Function Attrs: mustprogress nocallback nofree nosync nounwind readnone speculatable willreturn
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
; Function Attrs: argmemonly mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2
; Function Attrs: argmemonly mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2
; Function Attrs: noinline nounwind uwtable
define dso_local i32 @bar(i32 noundef %x) #3 !dbg !35 {
entry:
call void @llvm.dbg.value(metadata i32 %x, metadata !37, metadata !DIExpression()), !dbg !38
call void @llvm.pseudoprobe(i64 -2012135647395072713, i64 1, i32 0, i64 -1), !dbg !39
%add = add nsw i32 %x, 2, !dbg !40
ret i32 %add, !dbg !41
}
; Function Attrs: noinline nounwind uwtable
define dso_local i32 @matched(i32 noundef %x) #3 !dbg !42 {
entry:
call void @llvm.dbg.value(metadata i32 %x, metadata !44, metadata !DIExpression()), !dbg !45
call void @llvm.pseudoprobe(i64 -5844448289301669773, i64 1, i32 0, i64 -1), !dbg !46
%add = add nsw i32 %x, 3, !dbg !47
ret i32 %add, !dbg !48
}
; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 !dbg !49 {
entry:
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 1, i32 0, i64 -1), !dbg !59
call void @llvm.dbg.value(metadata i32 0, metadata !53, metadata !DIExpression()), !dbg !60
br label %for.cond, !dbg !61
for.cond: ; preds = %for.cond.cleanup3, %entry
%i.0 = phi i32 [ 0, %entry ], [ %inc8, %for.cond.cleanup3 ], !dbg !60
call void @llvm.dbg.value(metadata i32 %i.0, metadata !53, metadata !DIExpression()), !dbg !60
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 2, i32 0, i64 -1), !dbg !62
%cmp = icmp ult i32 %i.0, 1000, !dbg !64
br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !65
for.cond.cleanup: ; preds = %for.cond
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 3, i32 0, i64 -1), !dbg !67
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 11, i32 0, i64 -1), !dbg !68
ret i32 0, !dbg !68
for.body: ; preds = %for.cond
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 4, i32 0, i64 -1), !dbg !69
call void @llvm.dbg.value(metadata i32 0, metadata !55, metadata !DIExpression()), !dbg !70
br label %for.cond1, !dbg !71
for.cond1: ; preds = %for.body4, %for.body
%a.0 = phi i32 [ 0, %for.body ], [ %inc, %for.body4 ], !dbg !70
call void @llvm.dbg.value(metadata i32 %a.0, metadata !55, metadata !DIExpression()), !dbg !70
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 5, i32 0, i64 -1), !dbg !72
%cmp2 = icmp ult i32 %a.0, 10000, !dbg !75
br i1 %cmp2, label %for.body4, label %for.cond.cleanup3, !dbg !76
for.cond.cleanup3: ; preds = %for.cond1
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 6, i32 0, i64 -1), !dbg !67
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 9, i32 0, i64 -1), !dbg !78
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 10, i32 0, i64 -1), !dbg !79
%inc8 = add nuw nsw i32 %i.0, 1, !dbg !79
call void @llvm.dbg.value(metadata i32 %inc8, metadata !53, metadata !DIExpression()), !dbg !60
br label %for.cond, !dbg !81, !llvm.loop !82
for.body4: ; preds = %for.cond1
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 7, i32 0, i64 -1), !dbg !86
%0 = load volatile i32, ptr @x, align 4, !dbg !86, !tbaa !27
%call = call i32 @matched(i32 noundef %0), !dbg !88
store volatile i32 %call, ptr @x, align 4, !dbg !90, !tbaa !27
%1 = load volatile i32, ptr @x, align 4, !dbg !91, !tbaa !27
%call5 = call i32 @foo(i32 noundef %1), !dbg !92
store volatile i32 %call5, ptr @x, align 4, !dbg !94, !tbaa !27
%2 = load volatile i32, ptr @x, align 4, !dbg !95, !tbaa !27
%call6 = call i32 @bar(i32 noundef %2), !dbg !96
store volatile i32 %call6, ptr @x, align 4, !dbg !98, !tbaa !27
call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 8, i32 0, i64 -1), !dbg !99
%inc = add nuw nsw i32 %a.0, 1, !dbg !99
call void @llvm.dbg.value(metadata i32 %inc, metadata !55, metadata !DIExpression()), !dbg !70
br label %for.cond1, !dbg !101, !llvm.loop !102
}
; Function Attrs: inaccessiblememonly mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.pseudoprobe(i64, i64, i32, i64) #4
; Function Attrs: nocallback nofree nosync nounwind readnone speculatable willreturn
declare void @llvm.dbg.value(metadata, metadata, metadata) #5
attributes #0 = { nounwind uwtable "frame-pointer"="none" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "use-sample-profile" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind readnone speculatable willreturn }
attributes #2 = { argmemonly mustprogress nocallback nofree nosync nounwind willreturn }
attributes #3 = { noinline nounwind uwtable "frame-pointer"="none" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "use-sample-profile" }
attributes #4 = { inaccessiblememonly mustprogress nocallback nofree nosync nounwind willreturn }
attributes #5 = { nocallback nofree nosync nounwind readnone speculatable willreturn }
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!7, !8, !9, !10}
!llvm.ident = !{!11}
!llvm.pseudo_probe_desc = !{!12, !13, !14, !15}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "x", scope: !2, file: !3, line: 1, type: !5, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, globals: !4, splitDebugInlining: false, debugInfoForProfiling: true, nameTableKind: None)
!3 = !DIFile(filename: "test.c", directory: "")
!4 = !{!0}
!5 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !6)
!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!7 = !{i32 7, !"Dwarf Version", i32 5}
!8 = !{i32 2, !"Debug Info Version", i32 3}
!9 = !{i32 1, !"wchar_size", i32 4}
!10 = !{i32 7, !"uwtable", i32 2}
!11 = !{!""}
!12 = !{i64 6699318081062747564, i64 4294967295, !"foo"}
!13 = !{i64 -2012135647395072713, i64 4294967295, !"bar"}
!14 = !{i64 -5844448289301669773, i64 4294967295, !"matched"}
!15 = !{i64 -2624081020897602054, i64 844635331715433, !"main"}
!16 = distinct !DISubprogram(name: "foo", scope: !3, file: !3, line: 2, type: !17, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !19)
!17 = !DISubroutineType(types: !18)
!18 = !{!6, !6}
!19 = !{!20, !21}
!20 = !DILocalVariable(name: "x", arg: 1, scope: !16, file: !3, line: 2, type: !6)
!21 = !DILocalVariable(name: "y", scope: !16, file: !3, line: 3, type: !5)
!22 = !DILocation(line: 0, scope: !16)
!23 = !DILocation(line: 3, column: 3, scope: !16)
!24 = !DILocation(line: 3, column: 16, scope: !16)
!25 = !DILocation(line: 3, column: 20, scope: !16)
!26 = !DILocation(line: 3, column: 22, scope: !16)
!27 = !{!28, !28, i64 0}
!28 = !{!"int", !29, i64 0}
!29 = !{!"omnipotent char", !30, i64 0}
!30 = !{!"Simple C/C++ TBAA"}
!31 = !DILocation(line: 4, column: 10, scope: !16)
!32 = !DILocation(line: 4, column: 12, scope: !16)
!33 = !DILocation(line: 5, column: 1, scope: !16)
!34 = !DILocation(line: 4, column: 3, scope: !16)
!35 = distinct !DISubprogram(name: "bar", scope: !3, file: !3, line: 7, type: !17, scopeLine: 7, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !36)
!36 = !{!37}
!37 = !DILocalVariable(name: "x", arg: 1, scope: !35, file: !3, line: 7, type: !6)
!38 = !DILocation(line: 0, scope: !35)
!39 = !DILocation(line: 8, column: 10, scope: !35)
!40 = !DILocation(line: 8, column: 12, scope: !35)
!41 = !DILocation(line: 8, column: 3, scope: !35)
!42 = distinct !DISubprogram(name: "matched", scope: !3, file: !3, line: 11, type: !17, scopeLine: 11, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !43)
!43 = !{!44}
!44 = !DILocalVariable(name: "x", arg: 1, scope: !42, file: !3, line: 11, type: !6)
!45 = !DILocation(line: 0, scope: !42)
!46 = !DILocation(line: 12, column: 10, scope: !42)
!47 = !DILocation(line: 12, column: 12, scope: !42)
!48 = !DILocation(line: 12, column: 3, scope: !42)
!49 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 15, type: !50, scopeLine: 15, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !52)
!50 = !DISubroutineType(types: !51)
!51 = !{!6}
!52 = !{!53, !55}
!53 = !DILocalVariable(name: "i", scope: !54, file: !3, line: 16, type: !6)
!54 = distinct !DILexicalBlock(scope: !49, file: !3, line: 16, column: 3)
!55 = !DILocalVariable(name: "a", scope: !56, file: !3, line: 17, type: !6)
!56 = distinct !DILexicalBlock(scope: !57, file: !3, line: 17, column: 5)
!57 = distinct !DILexicalBlock(scope: !58, file: !3, line: 16, column: 34)
!58 = distinct !DILexicalBlock(scope: !54, file: !3, line: 16, column: 3)
!59 = !DILocation(line: 16, column: 12, scope: !54)
!60 = !DILocation(line: 0, scope: !54)
!61 = !DILocation(line: 16, column: 8, scope: !54)
!62 = !DILocation(line: 16, column: 19, scope: !63)
!63 = !DILexicalBlockFile(scope: !58, file: !3, discriminator: 0)
!64 = !DILocation(line: 16, column: 21, scope: !63)
!65 = !DILocation(line: 16, column: 3, scope: !66)
!66 = !DILexicalBlockFile(scope: !54, file: !3, discriminator: 0)
!67 = !DILocation(line: 0, scope: !49)
!68 = !DILocation(line: 23, column: 1, scope: !49)
!69 = !DILocation(line: 17, column: 14, scope: !56)
!70 = !DILocation(line: 0, scope: !56)
!71 = !DILocation(line: 17, column: 10, scope: !56)
!72 = !DILocation(line: 17, column: 21, scope: !73)
!73 = !DILexicalBlockFile(scope: !74, file: !3, discriminator: 0)
!74 = distinct !DILexicalBlock(scope: !56, file: !3, line: 17, column: 5)
!75 = !DILocation(line: 17, column: 23, scope: !73)
!76 = !DILocation(line: 17, column: 5, scope: !77)
!77 = !DILexicalBlockFile(scope: !56, file: !3, discriminator: 0)
!78 = !DILocation(line: 22, column: 3, scope: !57)
!79 = !DILocation(line: 16, column: 30, scope: !80)
!80 = !DILexicalBlockFile(scope: !58, file: !3, discriminator: 0)
!81 = !DILocation(line: 16, column: 3, scope: !80)
!82 = distinct !{!82, !83, !84, !85}
!83 = !DILocation(line: 16, column: 3, scope: !54)
!84 = !DILocation(line: 22, column: 3, scope: !54)
!85 = !{!"llvm.loop.mustprogress"}
!86 = !DILocation(line: 18, column: 19, scope: !87)
!87 = distinct !DILexicalBlock(scope: !74, file: !3, line: 17, column: 37)
!88 = !DILocation(line: 18, column: 11, scope: !89)
!89 = !DILexicalBlockFile(scope: !87, file: !3, discriminator: 186646631)
!90 = !DILocation(line: 18, column: 9, scope: !87)
!91 = !DILocation(line: 19, column: 15, scope: !87)
!92 = !DILocation(line: 19, column: 11, scope: !93)
!93 = !DILexicalBlockFile(scope: !87, file: !3, discriminator: 186646639)
!94 = !DILocation(line: 19, column: 9, scope: !87)
!95 = !DILocation(line: 20, column: 15, scope: !87)
!96 = !DILocation(line: 20, column: 11, scope: !97)
!97 = !DILexicalBlockFile(scope: !87, file: !3, discriminator: 186646647)
!98 = !DILocation(line: 20, column: 9, scope: !87)
!99 = !DILocation(line: 17, column: 33, scope: !100)
!100 = !DILexicalBlockFile(scope: !74, file: !3, discriminator: 0)
!101 = !DILocation(line: 17, column: 5, scope: !100)
!102 = distinct !{!102, !103, !104, !85}
!103 = !DILocation(line: 17, column: 5, scope: !56)
!104 = !DILocation(line: 21, column: 5, scope: !56)
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