Thank you very much!
I started to dig, and found that I can reboot my server running under
Hyper-V by doing 'sysctl -a'.
Can anybody confirm same behavoiur?

FreeBSD 10.0-BETA3, Win 2012 Datacenter

2013/11/5 Julian Elischer <jul...@freebsd.org>:
> On 11/4/13, 11:13 PM, Pavel Timofeev wrote:
>>
>> Hi! I upgraded to 10.0-BETA3 but still see messages like
>>
>> Tue Nov  5 11:09:05 MSK 2013
>> calcru: runtime went backwards from 1728 usec to 889 usec for pid 981
>> (zabbix_server)
>> calcru: runtime went backwards from 1229 usec to 703 usec for pid 976
>> (zabbix_server)
>> calcru: runtime went backwards from 1019 usec to 595 usec for pid 978
>> (zabbix_server)
>> calcru: runtime went backwards from 3041 usec to 1611 usec for pid 969
>> (zabbix_server)
>> calcru: runtime went backwards from 1078 usec to 595 usec for pid 975
>> (zabbix_server)
>> calcru: runtime went backwards from 1114 usec to 617 usec for pid 980
>> (zabbix_server)
>> calcru: runtime went backwards from 1086 usec to 602 usec for pid 977
>> (zabbix_server)
>> calcru: runtime went backwards from 1195 usec to 782 usec for pid 970
>> (zabbix_server)
>> calcru: runtime went backwards from 3206 usec to 2157 usec for pid 979
>> (zabbix_server)
>> calcru: runtime went backwards from 2179 usec to 1542 usec for pid 972
>> (zabbix_server)
>> calcru: runtime went backwards from 1833 usec to 927 usec for pid 1026
>> (cron)
>> calcru: runtime went backwards from 1091 usec to 551 usec for pid 1022
>> (sendmail)
>> calcru: runtime went backwards from 823 usec to 416 usec for pid 1022
>> (sendmail)
>> calcru: runtime went backwards from 4691 usec to 2735 usec for pid
>> 1011 (sendmail)
>> calcru: runtime went backwards from 1162 usec to 587 usec for pid 1011
>> (sendmail)
>> calcru: runtime went backwards from 947 usec to 478 usec for pid 1010
>> (httpd)
>> calcru: runtime went backwards from 895 usec to 452 usec for pid 1009
>> (httpd)
>> calcru: runtime went backwards from 954 usec to 482 usec for pid 1008
>> (httpd)
>> calcru: runtime went backwards from 909 usec to 459 usec for pid 1007
>> (httpd)
>> calcru: runtime went backwards from 1214 usec to 653 usec for pid 1006
>> (httpd)
>> calcru: runtime went backwards from 201793 usec to 102672 usec for pid
>> 996 (httpd)
>> calcru: runtime went backwards from 1105 usec to 1064 usec for pid 991
>> (sshd)
>> calcru: runtime went backwards from 45196 usec to 23221 usec for pid
>> 974 (zabbix_server)
>> calcru: runtime went backwards from 2192 usec to 1436 usec for pid 973
>> (zabbix_server)
>> calcru: runtime went backwards from 605 usec to 306 usec for pid 968
>> (zabbix_server)
>> calcru: runtime went backwards from 626 usec to 316 usec for pid 967
>> (zabbix_server)
>> calcru: runtime went backwards from 773 usec to 391 usec for pid 966
>> (zabbix_server)
>> calcru: runtime went backwards from 663 usec to 335 usec for pid 965
>> (zabbix_server)
>> calcru: runtime went backwards from 799 usec to 404 usec for pid 964
>> (zabbix_server)
>> calcru: runtime went backwards from 37723 usec to 19422 usec for pid
>> 963 (zabbix_server)
>> calcru: runtime went backwards from 49425 usec to 26265 usec for pid
>> 962 (zabbix_server)
>> calcru: runtime went backwards from 38883 usec to 20993 usec for pid
>> 961 (zabbix_server)
>> calcru: runtime went backwards from 53478 usec to 27411 usec for pid
>> 960 (zabbix_server)
>> calcru: runtime went backwards from 40845 usec to 21750 usec for pid
>> 959 (zabbix_server)
>> calcru: runtime went backwards from 47835 usec to 24455 usec for pid
>> 958 (zabbix_server)
>> calcru: runtime went backwards from 2257 usec to 1612 usec for pid 957
>> (zabbix_server)
>> calcru: runtime went backwards from 2361 usec to 1193 usec for pid 932
>> (zabbix_agentd)
>> calcru: runtime went backwards from 32053 usec to 16204 usec for pid
>> 928 (zabbix_server)
>> calcru: runtime went backwards from 32517 usec to 19280 usec for pid 697
>> (sh)
>> calcru: runtime went backwards from 1128021 usec to 868022 usec for pid
>> 697 (sh)
>> calcru: runtime went backwards from 9609 usec to 5601 usec for pid 601
>> (syslogd)
>> calcru: runtime went backwards from 688 usec to 348 usec for pid 106
>> (adjkerntz)
>> calcru: runtime went backwards from 12 usec to 6 usec for pid 3
>> (sctp_iterator)
>> calcru: runtime went backwards from 5467 usec to 2853 usec for pid 2
>> (fdc0)
>> calcru: runtime went backwards from 11306 usec to 8408 usec for pid 14
>> (rand_harvestq)
>> calcru: runtime went backwards from 136242 usec to 76230 usec for pid 13
>> (geom)
>> calcru: runtime went backwards from 156117 usec to 118882 usec for pid 12
>> (intr)
>> calcru: runtime went backwards from 7820 usec to 4847 usec for pid 1
>> (init)
>> calcru: runtime went backwards from 2340313 usec to 1226503 usec for
>> pid 1 (init)
>> calcru: runtime went backwards from 4114 usec to 2164 usec for pid 0
>> (kernel)
>>
>>
>> Is it bad? Or I have to ignore them?
>
>
> I'm not talking authoratatively but in some virtualization systems, if the
> TSCs on the various processors are not sufficiently synchronized, then when
> the hypervisor switches you from one CPU to another, you can get odd
> (sometimes negative) time readings which give messages like this..
>
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>>
>
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