Date: Wed, 28 Dec 2016 09:26:43 -0500 From: "James B. Byrne" <byrnejb@harte-lyne.ca> To: freebsd-questions@freebsd.org Subject: FreeBSD-11.0 BHyve ntpd issues Message-ID: <3671ad3ac07b36b28e1583a2020a6108.squirrel@webmail.harte-lyne.ca>
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I see this in /var/log/messages: > Dec 28 03:57:47 SAMBA-01 ntpd[560]: > frequency error -500 PPM exceeds tolerance 500 PPM > Dec 28 06:05:04 SAMBA-01 ntpd[560]: > frequency error -500 PPM exceeds tolerance 500 PPM Reading up on ntpd issues wrt vm's I ran these diagnostics on the vm: [root@SAMBA-01 ~]# dmesg | grep Timecounter Timecounter "i8254" frequency 1193182 Hz quality 0 Timecounter "HPET" frequency 10000000 Hz quality 950 Timecounter "ACPI-fast" frequency 3579545 Hz quality 900 Timecounters tick every 1.000 msec [root@SAMBA-01 ~]# sysctl kern.timecounter.hardware kern.timecounter.hardware: HPET I also found this thread, https://lists.freebsd.org/pipermail/freebsd-virtualization/2016-April/004382.html, on the FreeBSd list which suggested the following fix: > I found errors in /var/log/messages and fix adding: > > kern.timecounter.hardware=TSC-low > into /etc/sysctl.conf file I can add this as suggested but before I do can someone enlighten as to what is happening, why it happens, what the consequences are of not dealing with the problem, and what the recommended fix accomplishes. Should this suggestion be implemented or is there a better solution? The vm in question is, as its name suggests, a samba based AD-DC. Time synchronisation with the desktop units is critical for authentication. Thanks, -- *** e-Mail is NOT a SECURE channel *** Do NOT transmit sensitive data via e-Mail Do NOT open attachments nor follow links sent by e-Mail James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3
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