$ sudo timeout 100 strace -c -S calls -p 6610
Process 6610 attached
Process 6610 detached
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 44.64    0.880604           5    188716           epoll_pwait
  8.14    0.160510           1    122043           epoll_ctl
 13.52    0.266690           2    113789           sendto
 17.61    0.347271           4     89723           timer_settime
  9.27    0.182900           3     61556           read
  3.18    0.062664           1     50836        17 rt_sigreturn
  2.35    0.046272          14      3424           io_submit
  0.75    0.014730           4      3409           io_getevents
  0.45    0.008889          14       627           sendmsg
  0.09    0.001813          17       104           write
  0.00    0.000050           1        50        25 ioctl
  0.00    0.000049           2        25           fcntl
  0.00    0.000030           1        22           lseek
  0.00    0.000000           0        21           fstat
  0.00    0.000000           0        13           close
  0.00    0.000000           0        13           unlink
  0.00    0.000000           0        11           ftruncate
  0.00    0.000000           0         4           rt_sigprocmask
------ ----------- ----------- --------- --------- ----------------
100.00    1.972472                634386        42 total