# strace -f -q -c -p 1588
^C% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 51.41    0.543700         503      1081           poll
 19.70    0.208389          52      4035           epoll_wait
 18.04    0.190820        7339        26         9 futex
 10.21    0.108029       13504         8         2 restart_syscall
  0.31    0.003302           3      1019           timerfd_gettime
  0.30    0.003180           3      1019           read
  0.01    0.000127          25         5           nanosleep
  0.00    0.000012           6         2           gettid
------ ----------- ----------- --------- --------- ----------------
100.00    1.057559                  7195        11 total

also found this:
https://serverfault.com/questions/671546/asterisk-very-high-load-average-with-no-reason