* fix RecordEvent interface

* modify default level to 4

* update interface use

* add const default trace level

* update record event interface using

* update record event interface using

* update record event interface using

* update operator.cc

* update part2

* update part1

* update part3

* fix include profiler.h header in ps server

* fix include profiler.h header in ps server

* fix profiler.h header

* fix profiler.h header

* fix merge buf

* update

* fix bug

* fix bug