[all-commits] [llvm/llvm-project] f67011: [llvm-exegesis] Add support for validation counter...

[Aiden Grossman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f670112a591c83498e348f3ff2f73f02baf8e303
      https://github.com/llvm/llvm-project/commit/f670112a591c83498e348f3ff2f73f02baf8e303
  Author: Aiden Grossman <agrossman154 at yahoo.com>
  Date:   2024-01-19 (Fri, 19 Jan 2024)

  Changed paths:
    A llvm/test/tools/llvm-exegesis/X86/validation-counters.asm
    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 (#76653)

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.