Date: Fri, 20 Oct 2017 14:46:05 +0300 From: Boris Samorodov <bsam@passap.ru> To: freebsd-current@FreeBSD.org Subject: host, bhyve vm and ntpd Message-ID: <2931f1cc-6574-b58d-4b94-5f77fa5cdb85@passap.ru>
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Hi All,
I have got a host:
---
bhyve-host% uname -a
FreeBSD sm.bsnet 12.0-CURRENT FreeBSD 12.0-CURRENT #3 r322868: Fri Aug
25 05:25:26 MSK 2017
bsam@builder.bsnet:/usr/obj/usr/src/sys/GENERIC-FAST amd64 amd64
---
And a bhyve vm:
---
bhyve-vm: uname -a
FreeBSD builder.bsnet 12.0-CURRENT FreeBSD 12.0-CURRENT #58 r324782: Fri
Oct 20 05:12:17 MSK 2017
bsam@builder.bsnet:/usr/obj/usr/src/sys/PKG64X amd64 amd64
---
The only difference at kernel configs is a colored console. :-)
And here I get some weird (is it?) result at the VM (I expect ntpd to be
more stable):
---
bhyve-vm% for t in `jot 10`; do ntpq -pn; sleep 64; done
remote refid st t when poll reach delay offset
jitter
==============================================================================
XX.XX.XX.1 XX.XX.XX.245 4 u 9 64 3 0.605 -1.202
316.407
XX.XX.XX.1 XX.XX.XX.245 4 u 7 64 7 0.605 -1.202
358.395
*XX.XX.XX.1 XX.XX.XX.245 4 u 5 64 17 0.615 -328.42
181.405
*XX.XX.XX.1 XX.XX.XX.245 4 u 3 64 37 0.615 -328.42
214.868
*XX.XX.XX.1 XX.XX.XX.245 4 u 67 64 37 0.615 -328.42
214.868
*XX.XX.XX.1 XX.XX.XX.245 4 u 63 64 77 0.615 -328.42
268.618
*XX.XX.XX.1 XX.XX.XX.245 4 u 60 64 177 0.615 -328.42
333.175
XX.XX.XX.1 .STEP. 16 u 1910 64 0 0.000 0.000
0.000
XX.XX.XX.1 XX.XX.XX.245 4 u 27 64 1 0.703 -262.63
0.004
XX.XX.XX.1 XX.XX.XX.245 4 u 31 64 1 0.649 -331.43
68.800
---
At the same time host's results are very stable:
---
bhyve-host% for t in `jot 10`; do ntpq -pn; sleep 64; done
remote refid st t when poll reach delay offset
jitter
==============================================================================
*XX.XX.XX.1 XX.XX.XX.245 4 u 1 64 1 0.401 0.176
0.106
*XX.XX.XX.1 XX.XX.XX.245 4 u 6 64 3 0.401 0.176
0.459
*XX.XX.XX.1 XX.XX.XX.245 4 u 3 64 7 0.401 0.176
0.940
*XX.XX.XX.1 XX.XX.XX.245 4 u 67 64 7 0.401 0.176
0.940
*XX.XX.XX.1 XX.XX.XX.245 4 u 64 64 17 0.401 0.176
1.566
*XX.XX.XX.1 XX.XX.XX.245 4 u 60 64 37 0.448 1.275
1.739
*XX.XX.XX.1 XX.XX.XX.245 4 u 55 64 77 0.448 1.275
2.365
*XX.XX.XX.1 XX.XX.XX.245 4 u 53 64 177 0.448 1.275
3.110
*XX.XX.XX.1 XX.XX.XX.245 4 u 50 64 377 0.448 1.275
3.929
*XX.XX.XX.1 XX.XX.XX.245 4 u 45 64 377 0.443 8.750
4.722
---
The network is organized via bridge -- host igb and vm tap interfaces
are members of one bridge.
Are those results expected? Does it smell like a bug? Should I dig
furter?
--
WBR, Boris Samorodov (bsam)
FreeBSD Committer, http://www.FreeBSD.org The Power To Serve
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