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llvm / llvm-project / llvm / e3fb82b5cde595e6b6b75323847e4794b8a7449d / . / tools / llvm-exegesis
tree: f35427add58e38f9252dd2b7180fb11a838c1037 [path history] [tgz]
  1. lib/
  2. CMakeLists.txt
  3. llvm-exegesis.cpp
  4. README.md
tools/llvm-exegesis/README.md

llvm-exegesis

llvm-exegesis is a benchmarking tool that accepts or assembles a snippet and can measure characteristics of that snippet by executing it while keeping track of performance counters.

Currently Supported Platforms

llvm-exegesis is quite platform-dependent and currently only supports a couple platform configurations for benchmarking. The limitations are listed below. Analysis mode in llvm-exegesis is supported on all platforms on which LLVM is.

Currently Supported Operating Systems for Benchmarking

Currently, llvm-exegesis only supports benchmarking on Linux. This is mainly due to a dependency on the Linux perf subsystem for reading performance counters.

Currently Supported Architectures for Benchmarking

Currently, using llvm-exegesis for benchmarking is supported on the following architectures:

  • x86
    • 64-bit only due to this being the only implemented calling convention in llvm-exegesis currently.
  • ARM
    • AArch64 only
  • MIPS
  • PowerPC (PowerPC64LE only)

Note that not benchmarking functionality is guaranteed to work on all platforms.