Frequently Asked QuestionsΒΆ

  • What does <native symbol 0xdeadbeef> mean?: Debugging information might or might not be compiled with some libraries. If you see lots of those entries you might want to compile the libraries to include dwarf debugging information. In most cases gcc -g ... will help. If the symbol has been exported in the shared object (on linux), dladdr might still be able to extract the function name even if no debugging information has been attached.
  • What do the colors on vmprof.com mean?: For plain CPython there is no particular meaning, we might change that in the future. For PyPy we have a color coding to show at which state the VM sampled (e.g. JIT, Warmup, ...).
  • My Windows profile is malformed?: Please ensure that you open the file in binary mode. Otherwise Windows will transform n to rn.