(gdb) info threads
  Id   Target Id                                             Frame 
  1    Thread 0x7fbd2397d480 (LWP 2592557) "GaussMaster"     0x00007fbd246f2bed in poll () from /usr/lib64/libc.so.6
  2    Thread 0x7fbd22fff700 (LWP 2592558) "jemalloc_bg_thd" 0x00007fbd249d89f5 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib64/libpthread.so.0
* 3    Thread 0x7fbcfe1ff700 (LWP 2592588) "GaussMaster"     gs_signal_receiver_thread (args=0x7fbd234e51b0) at gs_signal.cpp:893