Please (strongly) consider switching to much better and more capable go pprof implementation (github.com/google/pprof). Sadly, distros continue to ship our old perl implementation, but upcoming 2.17 release already had that pprof implementation amputated. So, hopefully, it will encourage distros some more.

.clone thingy is artifact of optimizations and demangling. Sometimes compilers create optimized copies of certain functions (e.g. constant propagating some things). pprof is supposed to remove this detail from function name. (But sometimes you want to see those details and more, such as template arguments; see --symbolize option for that)

if or when you see mixed up parent/child relations, consider checking your stack trace capturing method. Skipping "first parent" stack frame is a known issue with frame-pointers-based stacktrace capturing. See here: https://github.com/gperftools/gperftools/wiki/gperftools'-stacktrace-capturing-methods-and-their-issues#frame-pointers