Snehasish Kumar 08e40c12fa
Reapply "[MemProf] Change histogram storage from uint64_t to uint16_t… (#151431)
Reapply #147854 after fixes merged in #151398.

Change memory access histogram storage from uint64_t to uint16_t to
reduce profile size on disk. This change updates the raw profile format
to v5. Also add a histogram test in compiler-rt since we didn't have one
before. With this change the histogram memprof raw for the basic test
reduces from 75KB -> 20KB.
2025-07-30 18:28:53 -07:00

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REQUIRES: x86_64-linux
Since the profile contains virtual addresses for the callstack,
we do not expect the raw binary profile to be deterministic. The
summary should be deterministic apart from changes to the shared
libraries linked in which could change the number of segments
recorded.
To update the inputs used below run Inputs/update_memprof_inputs.sh /path/to/updated/clang
RUN: llvm-profdata show --memory %p/Inputs/pic.memprofraw --profiled-binary %p/Inputs/pic.memprofexe -o - 2>&1 | FileCheck %s
CHECK: MemprofProfile:
CHECK-NEXT: Summary:
CHECK-NEXT: Version: 5
CHECK-NEXT: NumSegments: {{[0-9]+}}
CHECK-NEXT: NumMibInfo: 2
CHECK-NEXT: NumAllocFunctions: 1
CHECK-NEXT: NumStackOffsets: 2
CHECK-NEXT: Segments:
CHECK-NEXT: -
CHECK-NEXT: BuildId: {{[[:xdigit:]]+}}
CHECK-NEXT: Start: 0x{{[[:xdigit:]]+}}
CHECK-NEXT: End: 0x{{[[:xdigit:]]+}}
CHECK-NEXT: Offset: 0x{{[[:xdigit:]]+}}
CHECK-NEXT: -
CHECK: Records:
CHECK-NEXT: -
CHECK-NEXT: FunctionGUID: {{[0-9]+}}
CHECK-NEXT: AllocSites:
CHECK-NEXT: -
CHECK-NEXT: Callstack:
CHECK-NEXT: -
CHECK-NEXT: Function: {{[0-9]+}}
CHECK-NEXT: SymbolName: main
CHECK-NEXT: LineOffset: 1
CHECK-NEXT: Column: 21
CHECK-NEXT: Inline: 0
CHECK-NEXT: MemInfoBlock:
CHECK-NEXT: AllocCount: 1
CHECK-NEXT: TotalAccessCount: 2
CHECK-NEXT: MinAccessCount: 2
CHECK-NEXT: MaxAccessCount: 2
CHECK-NEXT: TotalSize: 10
CHECK-NEXT: MinSize: 10
CHECK-NEXT: MaxSize: 10
CHECK-NEXT: AllocTimestamp: {{[0-9]+}}
CHECK-NEXT: DeallocTimestamp: {{[0-9]+}}
CHECK-NEXT: TotalLifetime: 0
CHECK-NEXT: MinLifetime: 0
CHECK-NEXT: MaxLifetime: 0
CHECK-NEXT: AllocCpuId: {{[0-9]+}}
CHECK-NEXT: DeallocCpuId: {{[0-9]+}}
CHECK-NEXT: NumMigratedCpu: 0
CHECK-NEXT: NumLifetimeOverlaps: 0
CHECK-NEXT: NumSameAllocCpu: 0
CHECK-NEXT: NumSameDeallocCpu: 0
CHECK-NEXT: DataTypeId: {{[0-9]+}}
CHECK-NEXT: TotalAccessDensity: 20
CHECK-NEXT: MinAccessDensity: 20
CHECK-NEXT: MaxAccessDensity: 20
CHECK-NEXT: TotalLifetimeAccessDensity: 20000
CHECK-NEXT: MinLifetimeAccessDensity: 20000
CHECK-NEXT: MaxLifetimeAccessDensity: 20000
CHECK-NEXT: AccessHistogramSize: 0
CHECK-NEXT: AccessHistogram: 0
CHECK-NEXT: -
CHECK-NEXT: Callstack:
CHECK-NEXT: -
CHECK-NEXT: Function: {{[0-9]+}}
CHECK-NEXT: SymbolName: main
CHECK-NEXT: LineOffset: 4
CHECK-NEXT: Column: 15
CHECK-NEXT: Inline: 0
CHECK-NEXT: MemInfoBlock:
CHECK-NEXT: AllocCount: 1
CHECK-NEXT: TotalAccessCount: 2
CHECK-NEXT: MinAccessCount: 2
CHECK-NEXT: MaxAccessCount: 2
CHECK-NEXT: TotalSize: 10
CHECK-NEXT: MinSize: 10
CHECK-NEXT: MaxSize: 10
CHECK-NEXT: AllocTimestamp: {{[0-9]+}}
CHECK-NEXT: DeallocTimestamp: {{[0-9]+}}
CHECK-NEXT: TotalLifetime: 0
CHECK-NEXT: MinLifetime: 0
CHECK-NEXT: MaxLifetime: 0
CHECK-NEXT: AllocCpuId: {{[0-9]+}}
CHECK-NEXT: DeallocCpuId: {{[0-9]+}}
CHECK-NEXT: NumMigratedCpu: 0
CHECK-NEXT: NumLifetimeOverlaps: 0
CHECK-NEXT: NumSameAllocCpu: 0
CHECK-NEXT: NumSameDeallocCpu: 0
CHECK-NEXT: DataTypeId: {{[0-9]+}}
CHECK-NEXT: TotalAccessDensity: 20
CHECK-NEXT: MinAccessDensity: 20
CHECK-NEXT: MaxAccessDensity: 20
CHECK-NEXT: TotalLifetimeAccessDensity: 20000
CHECK-NEXT: MinLifetimeAccessDensity: 20000
CHECK-NEXT: MaxLifetimeAccessDensity: 20000
CHECK-NEXT: AccessHistogramSize: 0
CHECK-NEXT: AccessHistogram: 0