Just use std thread for now
Just use std thread for now


Former-commit-id: 6057ade159790641a87637e47c4f2ea44154f108
amaliujia/CMUDB-peloton,omegaga/peloton,larryxiao/peloton-1,larryxiao/peloton,larryxiao/peloton,ranxian/peloton,omegaga/peloton,amaliujia/CMUDB-peloton,amaliujia/CMUDB-peloton,omegaga/peloton,amaliujia/CMUDB-peloton,larryxiao/peloton,omegaga/peloton,larryxiao/peloton-1,ranxian/peloton,larryxiao/peloton,larryxiao/peloton-1,omegaga/peloton,ranxian/peloton,ranxian/peloton,larryxiao/peloton-1,amaliujia/CMUDB-peloton,omegaga/peloton,larryxiao/peloton,ranxian/peloton,omegaga/peloton,larryxiao/peloton,amaliujia/CMUDB-peloton,amaliujia/CMUDB-peloton,larryxiao/peloton-1,larryxiao/peloton-1,larryxiao/peloton,larryxiao/peloton-1,ranxian/peloton