Comment 24 for bug 1773959

I see 9% consistently, and as with those above, clock_gettime seems to be the culprit:

pat@wopr:~$ sudo strace -c -p 29333
[sudo] password for pat:
strace: Process 29333 attached

^Cstrace: Process 29333 detached
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
 83.37 2.716542 2 1494072 clock_gettime
  3.62 0.117823 32 3654 ioctl
  3.40 0.110891 3 40996 36714 recvmsg
  2.53 0.082418 6 13709 poll
[...]

Ubuntu 18.04, i7 4.0GHZ, 32GB RAM uname -a:
Linux wopr 4.15.0-42-generic #45-Ubuntu SMP Thu Nov 15 19:32:57 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux