[PATCH] D154275: [llvm-exegesis] Support older kernel versions in subprocess executor

[Aiden Grossman via Phabricator via llvm-commits]

aidengrossman created this revision.
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This patch switches from moving the performance counter file descriptor to the child process to socket calls rather than using the pidfd_getfd system call which was introduced in kernel 5.6. This significantly expands the range of kernel versions that are supported.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D154275

Files:
  llvm/test/tools/llvm-exegesis/X86/latency/memory-annotations-livein.s
  llvm/test/tools/llvm-exegesis/X86/latency/memory-annotations.s
  llvm/test/tools/llvm-exegesis/X86/latency/subprocess-abnormal-exit-code.s
  llvm/test/tools/llvm-exegesis/X86/latency/subprocess-segfault.s
  llvm/test/tools/llvm-exegesis/X86/latency/subprocess.s
  llvm/test/tools/llvm-exegesis/lit.local.cfg
  llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp

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