Function profile_print_info

lib/cpp/src/thrift/VirtualProfiling.cpp:297–339

* Print the recorded profiling information to the specified file. */

 * Print the recorded profiling information to the specified file.
 */
void profile_print_info(FILE* f) {
  typedef std::vector<std::pair<Key, size_t> > BacktraceVector;

  CountGreater is_greater;

  // Grab both locks for the duration of the print operation,
  // to ensure the output is a consistent snapshot of a single point in time
  Guard generic_calls_guard(generic_calls_mutex);
  Guard virtual_calls_guard(virtual_calls_mutex);

  // print the info from generic_calls, sorted by frequency
  //
  // We print the generic_calls info ahead of virtual_calls, since it is more
  // useful in some cases.  All T_GENERIC_PROTOCOL calls can be eliminated
  // from most programs.  Not all T_VIRTUAL_CALLs will be eliminated by
  // converting to templates.
  BacktraceVector gp_sorted(generic_calls.begin(), generic_calls.end());
  std::sort(gp_sorted.begin(), gp_sorted.end(), is_greater);

  for (BacktraceVector::const_iterator it = gp_sorted.begin(); it != gp_sorted.end(); ++it) {
    Key const& key = it->first;
    size_t const count = it->second;
    fprintf(f,
            "T_GENERIC_PROTOCOL: %zu calls to %s with a %s:\n",
            count,
            key.getTypeName(),
            key.getTypeName2());
    key.getBacktrace()->print(f, 2);
    fprintf(f, "\n");
  }

  // print the info from virtual_calls, sorted by frequency
  BacktraceVector vc_sorted(virtual_calls.begin(), virtual_calls.end());
  std::sort(vc_sorted.begin(), vc_sorted.end(), is_greater);

  for (BacktraceVector::const_iterator it = vc_sorted.begin(); it != vc_sorted.end(); ++it) {
    Key const& key = it->first;
    size_t const count = it->second;
    fprintf(f, "T_VIRTUAL_CALL: %zu calls on %s:\n", count, key.getTypeName());
    key.getBacktrace()->print(f, 2);
    fprintf(f, "\n");
  }
}

/**
 * Print the recorded profiling information to stdout.