(gdb) info threads
  40 Thread 0x41190950 (LWP 12523)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  39 Thread 0x40748950 (LWP 12524)  0x00007f551be53bd6 in poll () from /lib/libc.so.6
  38 Thread 0x41863950 (LWP 12525)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  37 Thread 0x40f59950 (LWP 12526)  0x00007f551be4ea1b in read () from /lib/libc.so.6
  36 Thread 0x414a7950 (LWP 12527)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  35 Thread 0x41523950 (LWP 12528)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  34 Thread 0x41be1950 (LWP 12529)  0x00007f551be53bd6 in poll () from /lib/libc.so.6
  33 Thread 0x40aaf950 (LWP 12530)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  32 Thread 0x41935950 (LWP 12531)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  31 Thread 0x419b1950 (LWP 12532)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  30 Thread 0x4120c950 (LWP 12533)  0x00007f551b61bfad in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  29 Thread 0x4041c950 (LWP 12534)  0x00007f551b61bfad in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  28 Thread 0x41033950 (LWP 12535)  0x00007f551be5d1bb in accept () from /lib/libc.so.6
  27 Thread 0x4177b950 (LWP 12536)  0x00007f551be53bd6 in poll () from /lib/libc.so.6
  26 Thread 0x41c5d950 (LWP 12537)  0x00007f551b61e384 in __lll_lock_wait () from /lib/libpthread.so.0
  25 Thread 0x4159f950 (LWP 12538)  0x00007f551be53bd6 in poll () from /lib/libc.so.6
  24 Thread 0x4161b950 (LWP 12563)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  23 Thread 0x40a31950 (LWP 12572)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  22 Thread 0x41a2d950 (LWP 12573)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  21 Thread 0x406ba950 (LWP 12574)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  20 Thread 0x410af950 (LWP 12575)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  19 Thread 0x4082b950 (LWP 12576)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  18 Thread 0x412d5950 (LWP 12577)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  17 Thread 0x41b22950 (LWP 12578)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  16 Thread 0x41cd9950 (LWP 12579)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  15 Thread 0x40498950 (LWP 12580)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  14 Thread 0x41d55950 (LWP 12581)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  13 Thread 0x41dd1950 (LWP 12582)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  12 Thread 0x41e4d950 (LWP 12583)  0x00007f551be53bd6 in poll () from /lib/libc.so.6
  11 Thread 0x41ec9950 (LWP 12584)  0x00007f551be53bd6 in poll () from /lib/libc.so.6
  10 Thread 0x41f45950 (LWP 12585)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  9 Thread 0x41fc1950 (LWP 12586)  0x00007f551be53bd6 in poll () from /lib/libc.so.6
  8 Thread 0x4203d950 (LWP 12587)  0x00007f551be2b071 in nanosleep () from /lib/libc.so.6
  7 Thread 0x41697950 (LWP 12589)  0x00007f551be2b071 in nanosleep () from /lib/libc.so.6
  6 Thread 0x420b9950 (LWP 12590)  0x00007f551be53bd6 in poll () from /lib/libc.so.6
  5 Thread 0x41351950 (LWP 12594)  0x00007f551b61bd29 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
  4 Thread 0x40605950 (LWP 12595)  0x00007f551be53bd6 in poll () from /lib/libc.so.6
  3 Thread 0x40b2b950 (LWP 12608)  0x00007f551b61e384 in __lll_lock_wait () from /lib/libpthread.so.0
  2 Thread 0x42135950 (LWP 12761)  0x00007f551b61e384 in __lll_lock_wait () from /lib/libpthread.so.0
  1 Thread 0x7f551c2f06e0 (LWP 12522)  0x00007f551be4ea1b in read () from /lib/libc.so.6