I was creating a snapshot of my VM which has freebsd 13.2 and has pfsense installed in it, when I encounter this logs
Oct 26 01:37:00 kernel: calcru: runtime went backwards from 446770083 usec to 30112729 usec for pid 374 (pf purge) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 10196 usec to 686 usec for pid 1014 (getty) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 10004 usec to 673 usec for pid 1015 (getty) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 8803 usec to 592 usec for pid 1016 (getty) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 8894 usec to 599 usec for pid 1017 (getty) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 4317 usec to 290 usec for pid 1018 (getty) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 10787 usec to 726 usec for pid 1402 (su) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 93858 usec to 11396 usec for pid 86394 (php-cgi) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 20818 usec to 1402 usec for pid 79867 (nginx) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 68016993 usec to 4591667 usec for pid 79868 (nginx) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 11359864 usec to 765565 usec for pid 79868 (nginx) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 3575 usec to 240 usec for pid 381 (pflogd) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 62569305 usec to 4225742 usec for pid 79869 (nginx) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 13883970 usec to 935669 usec for pid 79869 (nginx) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 77969052 usec to 5264356 usec for pid 79870 (nginx) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 12238871 usec to 836457 usec for pid 79870 (nginx) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 53601263 usec to 3622343 usec for pid 79871 (nginx) Oct 26 01:37:00 kernel: calcru: runtime went backwards from 5634804 usec to 379741 usec for pid 79871 (nginx) Oct 26 01:37:11 kernel: calcru: runtime went backwards from 18452780 usec to 1287573 usec for pid 0 (kernel) Oct 26 01:37:11 kernel: calcru: runtime went backwards from 3 usec to 0 usec for pid 0 (kernel) is this a normal behavior when creating a snapshot?
