There’s a new facility in DragonFly: kcollect(8).  It holds automatically-collected kernel data for about the last day, and can output to gnuplot.  Note the automatic collection part; your system will always be able to tell you about weirdness – assuming that weirdness extends to one of the features kcollect tracks.

http://lists.dragonflybsd.org/pipermail/users/2017-July/313549.html

source: Dfly