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README.md

Nix Profiled With Tracy

Profiling Idea

TODO: explain

  • Tracing thunk force operations.
  • Eval is single-threaded and recursive: easy to build stack frames out of global eval state.
  • Profiling infos are streamed to tracy server in that prototype.
  • In previous iterations, we tried:
    • keep the profile in memory and save it to memory in a previous iteration. See andir's version for code/more infos.
    • eBPF approach using USDTs (through bcc). We kept over-running the kernel/userspace ring buffer. See here for more infos/code.

TODOs

  • Add config flag to enable tracing.
  • Remove tracy submodule approach, inject it through Nix.