$ sudo strace -p 28939 -c -f

% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 94.65 1964.979469       90331     21753      3403 futex
  4.59   95.244375           6  14969333           clock_gettime
  0.34    7.032462          57    124120           poll
  0.13    2.694742           7    387109           sched_yield
  0.09    1.797210           8    236622           getpid
  0.08    1.607124           8    206848    163653 recvmsg
  0.07    1.399278          46     30546           ioctl
  0.04    0.814965          15     55576           writev
  0.01    0.304889          10     30263           write
  0.01    0.165253           8     19981           read
  0.00    0.030944          13      2456           nanosleep
  0.00    0.001773          26        68         1 openat
  0.00    0.001117           5       216       177 stat
  0.00    0.000966           9       111           close
  0.00    0.000837           6       132           fstat
  0.00    0.000607          10        62           mprotect
  0.00    0.000418          10        44           timerfd_create
  0.00    0.000376           6        65           fcntl
  0.00    0.000337           8        44           timerfd_settime
  0.00    0.000290         290         1           fsync
  0.00    0.000124          62         2           restart_syscall
  0.00    0.000122           6        22           getrusage
  0.00    0.000075          75         1           rename
  0.00    0.000030          30         1           madvise
  0.00    0.000018          18         1           clone
  0.00    0.000017          17         1           set_robust_list
  0.00    0.000016          16         1           prctl
  0.00    0.000015          15         1           fchown
  0.00    0.000011          11         1           fchmod
------ ----------- ----------- --------- --------- ----------------
100.00 2076.077860              16085381    167234 total