Usage: /usr/bin/ceph_perf_msgr_client [server ip:port] [numjobs] [concurrency] [ios] [thinktime us] [msg length]
       [server ip:port]: connect to the ip:port pair
       [numjobs]: how much client threads spawned and do benchmark
       [concurrency]: the max inflight messages(like iodepth in fio)
       [ios]: how much messages sent for each client
       [thinktime]: sleep time when do fast dispatching(match client logic)
       [msg length]: message data bytes