comp.protocols.time.ntp Google Group

Re: Win2k3 Server as NTP server?

ytl...@gmail.com (Why Tea) — Mon, 12 Dec 2009 01:20:11 UT

On Dec 3, 9:56 pm, Martin Burnicki <martin.burni...@meinberg.de>
wrote:
Hi Martin, thanks for the info and reference to your previous
post. David and Richard have also highlighted issues with
Windows clock tick resolution and performance under load.
We are dealing with some old legacy systems which

Re: CHU gadget box files

koste...@ntp.org (Steve Kostecke) — Sun, 12 Dec 2009 22:48:14 UT

[link]
[link]
gopher -p '/hardware/' archive.ntp.org
[link] for more ...
I'm using the CHU audio driver w/ a Soekris NET4801 & TenTec RC-320D
receiver (w/ Tim Shoppa's modified icom.[hc] files).

CHU gadget box files

jimmyterre...@gmail.com (jimmyterrence) — Sun, 12 Dec 2009 20:31:09 UT

Does anyone have a live link to the CHU gadget box files that used to
be at [link] ?
I can't seem to find them anywhere else.
On a related note, is there anyone using the gadget box, or are you
just using CHU audio drivers? I was wondering if it would be possible
to build just the PPS part of the circuitry and use a generic PPS

Re: help with setting up NTP on windows with a USB GPS

Sun, 12 Dec 2009 19:48:34 UT

Of course the application has to be well-designed and use appropriate
interactions with the OS - that goes without saying. NTP can measure
better than a millisecond on Windows. As the application is an existing
Windows one, the OS is fixed, and the challenge is then to provide the
best timekeeping within the imposed constraints.

Re: help with setting up NTP on windows with a USB GPS

da...@ex.djwhome.demon.invalid (David Woolley) — Sun, 12 Dec 2009 19:15:49 UT

These don't tell you the jitter due to the scheduling of the application
program and interrupt latencies from the real world events to the point
where the code tries to read the time.

Re: help with setting up NTP on windows with a USB GPS

Sun, 12 Dec 2009 18:51:04 UT

[]
Stated requirement:
- around 1 millisecond (on Window 2000 or XP IIRC).
Observed performance examples:
Windows 2000:
[link]
Windows XP:
[link]
Windows-7:
[link]
Now, let's see the evidence against.

Re: help with setting up NTP on windows with a USB GPS

a...@xyz.com (nemo_outis) — Sun, 12 Dec 2009 18:22:48 UT

"David J Taylor" <david-tay...@blueyonder.not-t his-bit.nor-this-
part.co.uk.invalid> wrote in news:pzISm.12393$Ym4.11362
@text.news.virginmedia.com:
"IF" your aunt had wheels she'd be a trolleycar (and there are coarser
variants on the theme).
However, whether Windows can keep time well enough for the job in hand is,

Re: NTP 4.2.5p250-RC Released

Sun, 12 Dec 2009 17:23:04 UT

[]
Well, if you insist, it could have been that 4.2.5p233 was worse than
4.2.5p232 because it failed under strange circumstances with Windows
Vista, but as Bill deduced, it was an uncorrected tyop!
David

Re: NTP 4.2.5p250-RC Released

un...@wormhole.physics.ubc.ca (unruh) — Sun, 12 Dec 2009 16:44:24 UT

It is not logically impossible (after all had he said Dave is rather
worse than Dave, you might have asked him to disambiguate, to use the
Wikipedia neologism, but would not say it is logially impossible), but
the suspicion is that there is a typo in there.

[OT] Old Hardware, Was Re: help with setting up NTP on windows with a USB GPS

g8...@nospam.uko2.co.uk (Dave Baxter) — Sun, 12 Dec 2009 16:39:39 UT

In article <ab949720-16c4-4032-9266-8bdc8 8c636b9
@h10g2000vbm.googlegroups.com> , evan...@mailinator.com says...
Hi..
Not long ago, on my journey home from work, along some dark country
lanes, I had to swerve to avoid some "Junk" in the middle of the road.
I stopped, went back to chuck it in the hedgerow, but saw sense and

Re: help with setting up NTP on windows with a USB GPS

g8...@nospam.uko2.co.uk (Dave Baxter) — Sun, 12 Dec 2009 16:32:56 UT

In article <slrnhhilur.scb.un...@wormhole .physics.ubc.ca>,
un...@wormhole.physics.ubc.ca says...
Hi.
As others have said, the time spent learning the new OS is somewhat
counter productive when one has a task to do, be it for a hobby, or job.
Otherwise, having played a little with F'BSD, I can see where you are

Re: NTP 4.2.5p250-RC Released

koste...@ntp.org (Steve Kostecke) — Sun, 12 Dec 2009 16:11:03 UT

4.2.5 is worse than 4.2.5 ?

Re: NTP 4.2.5p250-RC Released

Sun, 12 Dec 2009 16:06:49 UT

Oh, I did indeed miss the point! I saw that when I wrote it, and intended
to correct it, but must have forgotten. Or I typed "4" followed by "Del",
rather than "Del" followed by "4".
Anyway, I've set up limited monitoring on a better-behaved Vista system,
and just changed it from 4.2.4p6@DLH-QPC (230) to 4.2.4p6@DLH-QPC (273).

Re: NTP 4.2.5p250-RC Released

rgilber...@comcast.net (Richard B. Gilbert) — Sun, 12 Dec 2009 15:52:46 UT

I think you have missed the point of Steve's "???"!!!
He was commenting on your statement that "4.2.5 is rather worse than
4.2.5"! Since it is logically impossible it's also highly questionable!

Re: NTP 4.2.5p250-RC Released

Sun, 12 Dec 2009 15:38:15 UT

See the graph for PC Hydra here:
[link]
4.2.5 is a disaster on certain Windows PCs. Reported as bug number 1189
in May.
I may now be able to test on another Vista PC as well to provide another
data point.
Cheers,
David