I have profiled an application using perf, and I am confused why the names of the functions are so mangled in the report. For example, here is the output of perf report:
# Overhead Command Shared Object
# ........ ........... ................. .................................................................................................................................................................................................
#
38.98% hello_sp_tp libc-2.19.so [.] __memcpy_sse2_unaligned
|
--- __memcpy_sse2_unaligned
|
|--21.70%-- _ZN5nupic10algorithms6Cells46CStateaSERKS2_.local.1629
|
--17.28%-- _ZN5nupic10algorithms6Cells46Cells420updateInferenceStateERKSt6vectorIjSaIjEE
_ZN5nupic10algorithms6Cells46Cells47computeEPfS3_bb
For example, I recognize the name nupic.algorithms.Cells4.updateInferenceState(), but I'm not sure what all the other characters that pad the names mean.
What is _ZN5? What is IjSaIjEE at the end of this function name? What do these mean? Where do they come from?
These (C++ functions) names are mangled. Look at name mangling for the syntax details. That allows to encode complex C++ namings.
About your perf report, there are options to ask for demangling: --demangle that is theoretically set by default but real implementation may depend on the perf version or your CPU architecture.