[all-commits] [llvm/llvm-project] 76f199: [llvm-exegesis] Add support for validation counters

[Aiden Grossman via All-commits]

  Branch: refs/heads/users/boomanaiden154/exegesis-validation-counters-implementation
  Home:   https://github.com/llvm/llvm-project
  Commit: 76f199f4fc7244c3d972736595c685d7316c5203
      https://github.com/llvm/llvm-project/commit/76f199f4fc7244c3d972736595c685d7316c5203
  Author: Aiden Grossman <agrossman154 at yahoo.com>
  Date:   2023-12-30 (Sat, 30 Dec 2023)

  Changed paths:
    M llvm/tools/llvm-exegesis/lib/BenchmarkResult.cpp
    M llvm/tools/llvm-exegesis/lib/BenchmarkResult.h
    M llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp
    M llvm/tools/llvm-exegesis/lib/BenchmarkRunner.h
    M llvm/tools/llvm-exegesis/lib/LatencyBenchmarkRunner.cpp
    M llvm/tools/llvm-exegesis/lib/LatencyBenchmarkRunner.h
    M llvm/tools/llvm-exegesis/lib/PerfHelper.cpp
    M llvm/tools/llvm-exegesis/lib/PerfHelper.h
    M llvm/tools/llvm-exegesis/lib/Target.cpp
    M llvm/tools/llvm-exegesis/lib/Target.h
    M llvm/tools/llvm-exegesis/lib/UopsBenchmarkRunner.cpp
    M llvm/tools/llvm-exegesis/lib/UopsBenchmarkRunner.h
    M llvm/tools/llvm-exegesis/lib/X86/Target.cpp
    M llvm/tools/llvm-exegesis/lib/X86/X86Counter.cpp
    M llvm/tools/llvm-exegesis/llvm-exegesis.cpp
    M llvm/unittests/tools/llvm-exegesis/ClusteringTest.cpp
    M llvm/unittests/tools/llvm-exegesis/Mips/BenchmarkResultTest.cpp
    M llvm/unittests/tools/llvm-exegesis/X86/BenchmarkResultTest.cpp

  Log Message:
  -----------
  [llvm-exegesis] Add support for validation counters

This patch adds support for validation counters. Validation counters can
be used to measure events that occur during snippet execution like cache
misses to ensure that certain assumed invariants about the benchmark
actually hold. Validation counters are setup within a perf event group,
so are turned on and off at exactly the same time as the "group leader"
counter that measures the desired value.