On Mon, Nov 10, 2014 at 4:43 AM, Rob nom...@example.com wrote:
I compiled ntp-dev 4.2.7p448 on the CubieBoard2 (ARM processor) and added
a pool pool.ntp.org line to the config. It does not work.
What does the log say? You're looking for: Soliciting pool server A.B.C.D
What does the pool name
On Mon, Nov 10, 2014 at 2:55 PM, Rob nom...@example.com wrote:
Ok but why do I need to remove the nopeer and noquery restrictions
for a pool member? This does not appear to be necessary for a server.
Apparently restrict source was added a few years ago. It applies to
association creating
On Mon, Nov 10, 2014 at 6:14 PM, Rob nom...@example.com wrote:
I added these lines:
restrict -4 source notrap nomodify noquery
restrict -6 source notrap nomodify noquery
There appears to be no difference, but I'll wait a while.
The lines below work for me -- I don't normally use IPv6 for
On Mon, Nov 10, 2014 at 6:40 PM, Harlan Stenn st...@ntp.org wrote:
You need 'restrict source ...' to allow pool connections.
Or you need to have other sufficient restrict lines. Did you mean that you
literally have to have restrict source ... to use the pool directive? If
so where's that
On Tue, Nov 11, 2014 at 12:22 AM, E-Mail Sent to this address will be added
to the BlackLists Null@blacklist.anitech-systems.invalid wrote:
Did you mean that you literally have to have restrict source ... to
use the pool directive?
yes.
I was asking Harlan about very specific wording and
On Tue, Nov 11, 2014 at 11:32 AM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
As a Linux novice, I have to ask what are sysstats? On Raspian, at least,
I get command not found.
sysstats is an NTP statistics option. It's not a system command.
I have always found the
On Tue, Nov 11, 2014 at 9:57 AM, Rob nom...@example.com wrote:
When you think they are not a model then please provide (in the source
distribution) a model configuration.
Your not paying attention. The provided ntp.conf in Wheezy is for
Debianized 4.2.6. If you modify it for 4.2.7 *you*
)?
Certainly the documentation, the code and looking at a debug log suggest to
me that clock_combine is doing what one would expect.
I do see that prefer overrides clock_combine so the very common PPS
system would use a single clock offset.
--
Paul
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On Thu, Nov 13, 2014 at 3:17 PM, Phil W Lee p...@lee-family.me.uk wrote:
BTW, I also use and recommend the excellent Shield Up! security
checking utility on the Gibson Research site.
You should look into Steve Gibson's many detractors. All of his network
stuff is rubish or stolen from
On Thu, Nov 20, 2014 at 5:16 AM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
I
don't have a copy of the kernel config file.
Back in the day you could say:
# zcat /proc/config.gz |grep HZ
CONFIG_NO_HZ=y
CONFIG_HZ=100
Does that work on your system?
--
Paul
On Thu, Nov 20, 2014 at 11:46 AM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
But I am confused by the simultaneous appearance of a CONFIG_HZ value
(100) and the apparent N_HZ=y!
Because the HZ in NO_HZ leads you to the wrong conclusion.
NO_HZ means/meant don't deliver
On Thu, Nov 27, 2014 at 8:45 AM, Charles Elliott
charles.elliott...@comcast.net wrote:
The U.S. Government (NIST) has a new time server (time-d.nist.gov)
That depends on what you consider new.
So, do IPV6 addresses
result in anything useful when used in NTPD?
Yes.. E.g.
server
On Fri, Dec 5, 2014 at 9:37 AM, Charles Swiger cswi...@mac.com wrote:
I also make sure that my
timeservers are running in temperature-controlled environments so that
such daily drifts you mention are minimized.
I'm starting to think that people answering questions are unsure of the
real
On Fri, Dec 5, 2014 at 3:35 PM, Charles Swiger cswi...@mac.com wrote:
Well, we do have time enthusiasts around who like to achieve the best
precision they can, regardless of whether there is a specific business
justification or not. :-)
Sure but that doesn't help someone that just wants a
On Sat, Dec 6, 2014 at 7:27 AM, Charles Swiger cswi...@mac.com wrote:
Um, certainly? Are you concerned about the quality of the XO which
shipped with a Soekris board?
That'd be important if you were running a stratum-2+ timeserver.
If you don't do the reading you won't understand the
On Sat, Dec 6, 2014 at 11:12 AM, William Unruh un...@invalid.ca wrote:
You do not understand them, but feel confident to make recommendations
despite that?
While I'm not making a broader statement about who understands what I
believe you're conflating my comments with those from
On Sat, Dec 6, 2014 at 11:12 AM, William Unruh un...@invalid.ca wrote:
And in my tests 10 years ago or so, I used a local gps clock to test the
ability of chrony and ntpd to discipline a computer clock networked to
another server which was disciplined by a gps. Thus the network was the
same,
[I just don't understand why NTP people like GPSD]
On Sat, Dec 6, 2014 at 4:29 AM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
ln -s /dev/ttyAMA0 /dev/gps0
Sure that can work. I haven't looked at Refclock 46 in any detail though.
Secondly, in the documentation TVP is
On Sat, Dec 6, 2014 at 12:52 PM, Rob nom...@example.com wrote:
Not clients, management stations.
As opposed to one server dies and the Nagios server has bad time so it
shuts down the remaining NTPd. The world is full of crazy things.
The 4 is suggested as a minimum with more recommended.
On Sat, Dec 6, 2014 at 4:57 PM, William Unruh un...@invalid.ca wrote:
But then this thread was about Redhat, which is Linux.
I understand that but it's not the point. This thread is about a distro
defaulting to Chrony -- and why that's a bad (or good) thing. I say it's an
inconvenience
On Sat, Dec 6, 2014 at 5:44 PM, eugene...@sbcglobal.net wrote:
Has anyone noticed that Poul-Henning Kamp has work well underway
Yes.
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On Sat, Dec 6, 2014 at 7:19 PM, David Woolley
david@ex.djwhome.demon.invalid wrote:
It starts off a bit badly by talking about the size of nptd, when, in
fact, very little of ntpd is actually involved in the core algorithm. Most
of it, I guess, is reference clock drivers, plus configuration
On Sun, Dec 7, 2014 at 4:44 AM, juergen perlinger
juergen.perlin...@t-online.de wrote:
Well, they have a decent code base for dealing with a number of GPS
devices, and they have hardware PPS support. And using GPSD as a time
source makes more sense than using NTPD as source for position
On Sun, Dec 7, 2014 at 4:38 AM, Rob nom...@example.com wrote:
Your opinion about what's reasonable is just that. You have no more
credibility than Bill. In fact use the pool when my two servers are
down
nom...@example.com has less.
I did not write that.
It's called paraphrasing but
On Sun, Dec 7, 2014 at 4:35 AM, Rob nom...@example.com wrote:
It has been discussed before that reference clock drivers should be
loadable modules or even separate processes.
That's unnecessary complexity. refclock_atom is only ~ 200 lines. The code
just needs to be adjusted so you can build
On Sun, Dec 7, 2014 at 9:47 AM, Rob nom...@example.com wrote:
This is not what I would deploy inside a company, as the topic of this
thread is.
No,
your topic of your sub-thread was that your servers like all
professionally managed systems are only ever down for short,
inconsequential periods
On Sun, Dec 7, 2014 at 1:22 PM, David Woolley
david@ex.djwhome.demon.invalid wrote:
Most ntpd users these days will install binary packages, not build from
source.
Indeed and O(none) of those users will be running refclocks. That's the
problem according to the pool isn't it -- all clients,
On Sun, Dec 7, 2014 at 2:42 PM, Charles Swiger cswi...@mac.com wrote:
I would agree with this point if it were applicable.
In fact it is as others have tried to point out to you.
... Heck, even today's modern smartphone has an
AGPS chip and more horsepower than a ~2002-era Soekris with an
On Sun, Dec 7, 2014 at 10:00 PM, Harlan Stenn st...@ntp.org wrote:
A complete rewrite of the full NTP software is slated for post-4.2.8.
Is that a a rewrite independent of of LF funded work or what you hope will
flow from the LF funded work plus the further development based on
matching funds?
I asked before but I'll try again since tsc has come up.
Mills says (Mitigation Rules and the prefer Keyword):
The clock combine algorithm uses the survivor list to produce a weighted
average of both offset and jitter. Absent other considerations discussed
later, the *combined offset* is used to
On Mon, Dec 8, 2014 at 4:46 AM, David Woolley
david@ex.djwhome.demon.invalid wrote:
[Note: your news client failed to add a References header.]
It's a mail client
(I'm on the list because of the Google Groups problem some time back)
.
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On Mon, Dec 8, 2014 at 4:46 AM, David Woolley
david@ex.djwhome.demon.invalid wrote:
There is a lot of confusion in the community about this because of the
concept of a system peer, and simplistic explanations of what this means.
Yet I wouldn't expect phk to have a simplistic understanding of
On Mon, Dec 8, 2014 at 12:27 PM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
When using the pool directive, NTP tries to get a certain total number of
servers. What is that number, please (I don't know where to find it in the
source code). I'm seeing a total of 9 servers, with
On Tue, Dec 9, 2014 at 9:29 AM, Sander Smeenk ssme...@freshdot.net wrote:
1) Can i get a 'true PPS sync' with this setup?
Yes.
Eliminating gpsd so 'ntpq -p' shows 'oSHM(1)' instead of '*SHM(1)' ?
What do you mean by Eliminating?
2) What could i possibly do to get NTP to sync/accept the
On Tue, Dec 9, 2014 at 12:24 PM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
Paul, does the NMEA (or ATOM) driver solve the problem of having perhaps a
couple of hundred milliseconds peak-to-peak jitter in the GPS serial data,
thereby preventing NTP using the PPS source?
As I
On Tue, Dec 9, 2014 at 3:17 PM, Nomen Nescio nob...@dizum.com wrote:
The PPS pulses and NMEA sentences need to be close enough before
ntpd will accept them. Usually that means the the NMEA sentence needs to
arrive during the bounds of the second it is naming.
If that's not happening your GPS
On Tue, Dec 9, 2014 at 4:02 PM, David Lord sn...@lordynet.org wrote:
My xtal book gives either parabolic or lazy-s curves but the
real problem with cheap crystals is that the turning point or
flat sections can be way off the ambient temperature.
phk suggests that modern high-clock systems
On Wed, Dec 10, 2014 at 5:04 AM, Miroslav Lichvar mlich...@redhat.com
wrote:
See also the following post, apparently the BBB can use a separate HW
timer to timestamp PPS, reducing the error and jitter significantly.
http://blog.dan.drown.org/beaglebone-black-timer-capture-driver/
It looks
On Dec 11, 2014 2:55 PM, A C
Debian wheezy's packaged ntpd does include PPS support.
Given the Debian position on timepps this is surprising. Of course what
happens in Wheezy and BSD may not be relevant to Ubuntu users like the OP.
pps-tools is also available from launchpad if you're not
On Thu, Dec 11, 2014 at 4:57 PM, Sander Smeenk ssme...@freshdot.net wrote:
Aparently all that is missing in the ntp package (in Ubuntu?) is a
Build-Depends on the pps-tools package to provide timepps.h in
/usr/include/sys/
This doesn't even introduce new binary dependencies. The pps-tools
On Dec 12, 2014 12:39 AM, Harlan Stenn st...@ntp.org wrote:
It's an OS-specific file that should be provided by the OS if the
underlying API exists.
To repeat what I reminded you of last time. Linux *doesn't* have the API.
The macros in timepps provide the RFC compliant API. The NTP
On Fri, Dec 12, 2014 at 9:47 AM, David Woolley
david@ex.djwhome.demon.invalid wrote:
NTP doesn't control this interface. The de facto interface is defined by
the kernel code.
I don't understand this.
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On Fri, Dec 12, 2014 at 7:23 PM, Harlan Stenn st...@ntp.org wrote:
In how many places should that be documented? Where should it be
documented in the NTP distribution, or on any of the websites?
Not to be (too) flip but I'd create a file called :README.1ST with some
text like:
Much of the
On Sat, Dec 13, 2014 at 2:52 AM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
For some reason, gpsd seems to be stuck at a lower release for the
Raspberry Pi version of Debian, so I will have a go at recompiling it once
I can find the right instructions! That's if there's no
On Sat, Dec 13, 2014 at 5:01 AM, Rob nom...@example.com wrote:
Current build dependencies on Debian are:
That's better said on my install of Debian. I wouldn't expect it be the
case on all release tracks and it doesn't help Ubuntu.
Of course for an S1 operator the fact that this approach
On Sat, Dec 13, 2014 at 3:16 PM, Rob nom...@example.com wrote:
You know what? On the ntp-dev package for Debian THE BUILD DEPENDENCIES
ARE INCORRECT AS WELL!!
This is an example of what NTF doesn't want to deal with. My instance of
Wheezy doesn't have ntp-dev.
Fortunately there is gpsd.
On Sun, Dec 14, 2014 at 4:56 AM, Rob nom...@example.com wrote:
gpsd can use pps without any kernel support and without any additional
files.
I didn't think we were talking about user-space solutions although
user-space PPS should be better than typical (bad) NMEA.
On Sun, Dec 14, 2014 at 9:12 AM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
With sys/timepps.h present I got an ntp which didn't see PPS and produced
a clock type 22 invalid error message, with timepps.h present the
executable runs PPS correctly.
Although these sorts of
On Mon, Dec 15, 2014 at 3:13 AM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
./configure --enable-linuxcaps
Are you saying that config.h doesn't have #define HAVE_LINUX_CAPABILITIES
if you don't explicitly --enable-linuxcaps?
___
On Mon, Dec 15, 2014 at 2:02 PM, Rob nom...@example.com wrote:
Ok but of course it is a playskool kit, not something designed for
serious use. We experimented a bit with it for our project but quickly
dumped it in favour of Debian Wheezy.
I don't think Ubuntu is a playskool kit. In my
On Tue, Dec 16, 2014 at 8:52 AM, Martin Burnicki
martin.burni...@meinberg.de wrote:
In the past there may have been reasons to check this at compile time, but
as I've already pointed out in another posting the checks could at least be
made at runtime on system which likely provide a PPS API
On Mon, Dec 15, 2014 at 10:45 PM, E-Mail Sent to this address will be added
to the BlackLists Null@blacklist.anitech-systems.invalid wrote:
I would have guessed its more likely a timepps.h
License term issue? Perhaps timepps.h GNU General Public
Licensing has never come up in the various
On Tue, Dec 16, 2014 at 8:46 AM, Martin Burnicki
martin.burni...@meinberg.de wrote:
I'm not familiar with the PPS API provided by {SCO,Solaris,SunOS}. The
header files have to match the implemented API, and at least the API
supported by current Linux systems should be conforming to the RFC
Maybe you should read to the end of these threads before posting.
On Mon, Dec 15, 2014 at 10:34 PM, E-Mail Sent to this address will be added
to the BlackLists Null@blacklist.anitech-systems.invalid wrote:
Increase TOS MinDist
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On Tue, Dec 16, 2014 at 10:10 AM, Martin Burnicki
martin.burni...@meinberg.de wrote:
OK, but what is the problem in using these IOCTLs directly from within
ntpd, via wrapper functions or directly? Several refclock drivers do so.
You'll have to ask Harlan.
On Wed, Dec 17, 2014 at 7:04 AM, Harlan Stenn st...@ntp.org wrote:
I'd love to see discussion about what should the default number of
servers queried be for the 'pool' directive?
I don't think it matters. Properly configured systems and sub-nets will
have little impact and poorly configured
On Thu, Dec 18, 2014 at 7:42 PM, E-Mail Sent to this address will be added
to the BlackLists Null@blacklist.anitech-systems.invalid wrote:
... didn't someone just say licenses were not an issue,
when I pointed out they might be in a previous post ;-p
Yes, the current license isn't why the
On Wed, Dec 17, 2014 at 3:22 PM, folkert folk...@vanheusden.com wrote:
- kernel : 13.2us jitter on average
- userspace: 9.6us jitter on average
I'm not seeing similar results. Using ntpq I see a fixed .004 jitter
however I'm not sure that's the right metric. I should think clock jitter
On Sun, Dec 21, 2014 at 9:19 AM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
The except was that if you have a local node defined as a server, and you
want that node to be able to issue ntpq commands, it seems that the
configuration I suggested blocks this, even adding query to the
On Sun, Dec 21, 2014 at 7:04 AM, Rob nom...@example.com wrote:
That means I don't accept that anyone outside does something that may
modify my server (including setting up a peer relationship).
If you actually think the software is so badly designed that it would allow
this you should stop
On Sun, Dec 21, 2014 at 3:10 PM, Rob nom...@example.com wrote:
The documentation is very difficult to read.
I better spend my time on other things.
Well I certainly hope everyone here will notice that you have better things
to do than read the documents ...
Or even ask:
will using
On Sun, Dec 21, 2014 at 3:23 PM, William Unruh un...@invalid.ca wrote:
Why would it be searching for timepps.h when it had already found
sys/timepps.h?
I suspect there's a multitude that believe configure is ... inefficient.
Nothing like building on an armel to make you rethink
On Sun, Dec 21, 2014 at 7:54 PM, Harlan Stenn st...@ntp.org wrote:
What would be demonstrably better?
That's an impossible request. No one can know a priori if you'd make a
good-faith effort to switch to say CMake and then find it better than Auto*
I'm willing to excuse the the
On Sun, Dec 21, 2014 at 4:25 PM, William Unruh un...@invalid.ca wrote:
There are lots of people who are strongly interested in having good
time, but cannot simply upgrade to 4.2.8.
And yet people apply critical monthly patches from Microsoft and Oracle all
the time without running them
On Mon, Dec 22, 2014 at 5:27 AM, David Woolley
david@ex.djwhome.demon.invalid wrote:
On 22/12/14 04:02, Paul wrote:
And yet people apply critical monthly patches from Microsoft and Oracle
all
the time without running them through dev and q/a.
Not on business critical servers.
Normally
On Mon, Dec 22, 2014 at 4:14 AM, Rob nom...@example.com wrote:
David Woolley david@ex.djwhome.demon.invalid wrote:
On 21/12/14 20:10, Rob wrote:
What I got from the documentation is that without nopeer a server
could setup a peer association. I don't like that.
No. Without nopeer, a
On Sun, Dec 28, 2014 at 11:11 AM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
I wonder whether this might be a firewall issue
The first question is always: does it work with the firewall off?
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These are some commands that might stop your instance. Or set your house on
fire.
/etc/rc.d/ipfw stop
ipfw disable firewall
ipfw -f flush
Your traces certainly look like the firewall is blocking the traffic.
On Sun, Dec 28, 2014 at 2:37 PM, David Taylor
david-tay...@blueyonder.co.uk.invalid
I have a USR 5637 connected to a Linux host using a VoIP line. I can
manually dial and often* successfully connect to the NIST/USNO numbers.
When used as a server it typically manages two (at random) successful
connections over 8 polls. All other connection attempts fail including all
other calls
On Mon, Feb 2, 2015 at 4:48 PM, utah...@gmail.com wrote:
Back to the offset with the HP Z3801 and Z3805. This is not a leap second
bug, it is something I am doing wrong on the HP; I've got two Z3805s off by
16 seconds
They're using GPS rather tnan UTC time. Presumably some SCPI like this:
On Fri, Feb 6, 2015 at 3:17 PM, walter.preunin...@gmail.com wrote:
Ok, so these questions might be off the wall.
Yes.
Is there any reason why I could not share the PPS output of say, my u-blox
7 GPS module on multiple computers?
Of course you can. However the correct way to do this is
On Sat, Feb 7, 2015 at 1:15 PM, William Unruh un...@invalid.ca wrote:
Some receivers allow you to feed in the current location
Stationary (or fixed-position) operation is an expected capability of
timing receivers. Likewise antenna delay, sawtooth correction if needed
and loss of lock
On Thu, Jan 15, 2015 at 12:03 PM, Rob nom...@example.com wrote:
Terje Mathisen terje.mathi...@tmsw.no wrote:
it would seem to
be a nice NTPD startum 1 server.
Of course, it could still be good enough when you want to use it as a
network time server.
Which is what was suggested. After
On Thu, Jan 15, 2015 at 8:41 AM, Terje Mathisen terje.mathi...@tmsw.no
wrote:
[Fitlet] includes a serial port which should make it trivial to attach a
Sure GPS board.
If they use a standard pinout. The PC-2i didn't support DCD which makes it
not quite trivial.
Hopefully the hardware
On Thu, Jan 15, 2015 at 2:20 PM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
.. although expensive compared to a Raspberry Pi, if somewhat better in
potential performance.
Among my (S1) clique of clocks the leading predictor of offset is network
connection not cpu.
As you might
On Thu, Jan 15, 2015 at 1:16 PM, Rob nom...@example.com wrote:
It was suggested as a high-perf NTP server
That string is not in the message. It's not a quote despite your quotation
marks.
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On Thu, Jan 15, 2015 at 4:40 PM, Terje Mathisen terje.mathi...@tmsw.no
wrote:
Not in my msg, but in the subject of the entire thread. :-)
I'm so used to nomail@example being wrong I had a knee-jerk reaction. My
bad.
This does give me the chance to ask what a high-perf NTP server might be.
On Tue, Jan 20, 2015 at 6:51 AM, George Ross g...@inf.ed.ac.uk wrote:
From the Acutime 2000 user guide: The time tag provides a resolution of
320ns Is PPS going to be sufficiently better that it would outweigh
the additional setup complexity?
No.
On Wed, Jan 21, 2015 at 5:24 PM, Harlan Stenn st...@ntp.org wrote:
What is missing? We thought we caught all of the useful cases.
I made a small error. I meant ntpq and ntpd.
ntpdate -d
ntpdc fudge (admittedly that's not a query)
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On Wed, Jan 21, 2015 at 6:00 PM, Mike Cook michael.c...@sfr.fr wrote:
I don't have a free client to test this on, but I believe that by
default ntpdate will SLEW the clock
Yes, even the most cursory grep of ntpdate shows adjtime and slewing. The
-b and -B flags provide coarse controls.
On Wed, Jan 21, 2015 at 10:17 PM, Harlan Stenn st...@ntp.org wrote:
ntpdate -d
That's covered. See
http://support.ntp.org/bin/view/Dev/DeprecatingNtpdate
I may be abusing ntpdate but ntpd -q -d (but sets the clock!) is not the
same as ntpdate -d which explicitly doesn't set the clock.
On Wed, Jan 21, 2015 at 5:40 PM, Harlan Stenn st...@ntp.org wrote:
... I'm not aware of anything on either Windows or Unix that would cause
any
applied immediate adjustment to have *any* residual affect on ntp.
Well ... at least under Linux if ntpdate calls adjtime and then another
program
[And this is why I wonder why leap seconds are discussed here.]
On Mon, Jan 19, 2015 at 7:15 AM, Mike S mi...@flatsurface.com wrote:
You clearly misunderstood TF.460
You're using the wrong reference. Try this one from 2007:
On Mon, Jan 19, 2015 at 9:56 AM, Mike S mi...@flatsurface.com wrote:
You're citing a internal letter, from one BIPM group to another, asking
them to bring something before the ITU. It's not normative, it's not
informational, it's just correspondence.
That doesn't make any sense. When the
On Mon, Jan 19, 2015 at 2:57 AM, George Ross g...@inf.ed.ac.uk wrote:
Is there anyone with the prior experience in getting these older
Trimble units to work?
We've had a Trimble Acutime 2000 running since 2005, at two separate sites.
Although the Palisades driver has been extended to the
On Mon, Jan 19, 2015 at 10:43 AM, Mike S mi...@flatsurface.com wrote:
Again, you need to up your understanding of standards terminology.
No, if you're going to use jargon you should provide the meanings you're
using. Since you clearly have your own version of reality it will help the
rest of
On Mon, Jan 19, 2015 at 4:55 AM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
I get errors flagged at the points marked with X below:
Did you upgrade the version of NTPd? I don't think older versions checked
for or cared about invalid keywords.
I've tried reading the
On Thu, Jan 15, 2015 at 9:23 PM, William Unruh un...@invalid.ca wrote:
This does give me the chance to ask what a high-perf NTP server might be.
I would have assumed the accuracy with which ntpd disciplines the computer
The jitter variability (from loopstats) on one of my clocks is ~1e-7, on
On Fri, Jan 16, 2015 at 2:02 AM, Terje Mathisen terje.mathi...@tmsw.no
wrote:
Anyway it is definitely possible to get into the 100K to 1M
requests/second range.
As I noted above the real problem isn't in the actual packet processing,
which can be made very efficient indeed for the normal
On Fri, Jan 16, 2015 at 9:02 AM, Charles Elliott elliott...@comcast.net
wrote:
Never tell a person he is wrong ...
I'm not sure what your point is but that statement is ridiculous. Frequent
and immediate correction is the PLL we want here. Wrong answers don't help
anyone.
By the way, you
On Fri, Jan 16, 2015 at 7:49 PM, Oceanos Admin sysad...@cellmail.com
wrote:
Hi:
We were looking to use an older Trimble Thunderbolt 8 channel GPS receiver
for providing a Stratum 1 time reference
The standard hobbyist T-Bolt management program is Lady Heather. It a
windows (dos) program
On Wed, Jan 14, 2015 at 5:00 AM, Terje Mathisen terje.mathi...@tmsw.no
wrote:
By _far_ the largest majority of all system time calls are asking for the
_current_ time, right?
Are there (common) systems that have kernel calls for other than the
current time?
On Wed, Jan 21, 2015 at 10:46 PM, Harlan Stenn st...@ntp.org wrote:
Right, so if you don't want that use sntp instead.
Are these numbers consistent? If ntpdate is reporting seconds and sntp is
reporting milliseconds then it an order of magnitude difference. Otherwise
it's several orders of
On Tue, Jan 20, 2015 at 1:45 PM, William Unruh un...@invalid.ca wrote:
You would presumeably want a daemon to read the clock and toggle the pin,
perhaps with interrupts turned off
That would be NTPd refclock 29 mode N where N select an event stamping
receiver. Naturally doing this in user
On Wed, Jan 21, 2015 at 9:48 AM, Sander Smeenk ssme...@freshdot.net wrote:
What is actually wrong with running ntpdate to initially sync a clock?
Nothing. The party line is that ntpdate and ntpdc are deprecated. I do
hope that ntpq eventually incorporates all the features (I care about) of
On Thu, Jan 22, 2015 at 4:07 AM, Rob nom...@example.com wrote:
The problem is that ntpd believes that corrections it is applying are
because of frequency errors in the clock, while in this case they
are because of resets done externally.
During the startup phase, bad things happen anyway
On Wed, Feb 11, 2015 at 4:32 PM, Harlan Stenn st...@ntp.org wrote:
There are times repair is perfectly acceptable, and we do that.
There are times replace is better, and we do that.
My point is a long drawn-out discussion of changes to the core of ntp seem
less than productive when the
On Mon, Feb 16, 2015 at 5:22 AM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
I hope that ntimed will not be available only on Linux
If you have a non-trivial interest I suggest reading the notes. E.g.
Ntimed-client puts the entire interface to the OS timekeeping in four
On Mon, Feb 16, 2015 at 2:57 AM, David Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
For me, there are two show-stoppers with Chrony:
- no support for standard NTP monitoring commands.
- no support for ref-clocks on Windows.
Like many others, I have built up a considerable
On Thu, Feb 12, 2015 at 12:00 PM, William Unruh un...@invalid.ca wrote:
This means that if you are using say a PPS source, which gives
microsecond long term offset, it can take many hours to get there
This has been asserted and corrected before -- as in years ago*. A
properly configured
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