Also, do you have this fix in place?
commit f35040a7b2d3acea4f879afbc7ae4d8bfa09b575
Author: Dan McDonald <danmcd at omniti.com>
Date: Mon Aug 8 17:17:31 2016 -0400
systemd kool-aid drinkers (e.g. Ubuntu 16) need proc_clock_highres privileges
Dan