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GCC Profiler Internals

by fcambus on 5/20/22, 3:32 PM with 13 comments

• by mhh__ on 5/20/22, 5:07 PM

  1. Might want to mention FDO, even if it doesn't use the gcc-native profiling data.

  2. Do not use instrumenting profilers for measuring code.

• by flakiness on 5/20/22, 6:55 PM

  Is there anyone still using these instrumentation based profilers (vs sampling profiler like perf)? How is it like today?

  I stopped using it a long time ago since it was so slow and not thread-safe. But I occasionally miss the comprehensive coverage it had. If the situation has changed, I'd love to give it another shot.