root@m62:~/src/libtorrent-0.12.1# strace -cfp 31578
Process 31582 attached with 4 threads - interrupt to quit
Process 31580 detached
Process 31581 detached
Process 31582 detached
Process 31578 detached
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 68.30    5.576353       37678       148        36 futex
 31.66    2.584512          23    110220           epoll_wait
  0.01    0.000825           0    226465           epoll_ctl
  0.01    0.000655           0    220442           rt_sigprocmask
  0.01    0.000577           0      4044           close
  0.01    0.000542           0    221159           gettimeofday
  0.00    0.000070           0      4064           read
  0.00    0.000055           0      3912           fcntl64
  0.00    0.000055           0       972           sendmsg
  0.00    0.000046           0      1946           stat64
  0.00    0.000044           0      1956       983 connect
  0.00    0.000034           0      9855           time
  0.00    0.000022           0       978           mmap2
  0.00    0.000021           0      3054           ioctl
  0.00    0.000020           0       973           sendto
  0.00    0.000019           0       973           send
  0.00    0.000018           0      1946           bind
  0.00    0.000016           0      1946           poll
  0.00    0.000015           0      3857       938 recvmsg
  0.00    0.000014           0       973           getsockname
  0.00    0.000011           0      3348           write
  0.00    0.000011           0      2929           socket
  0.00    0.000009           0       973           fstat64
  0.00    0.000008           0      1096           getsockopt
  0.00    0.000000           0       973           open
  0.00    0.000000           0         5           brk
  0.00    0.000000           0       986           munmap
  0.00    0.000000           0         1           accept
  0.00    0.000000           0       973           recvfrom
------ ----------- ----------- --------- --------- ----------------
100.00    8.163952                831167      1957 total