Date: Mon, 22 Mar 1999 14:28:50 +0100 From: Poul-Henning Kamp <phk@critter.freebsd.dk> Subject: NTP kernel support in FreeBSD, a few notes... Message-ID: <14969.922109330.1@critter.freebsd.dk>
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Subject: NTP kernel support in FreeBSD, a few notes...
Date: Mon, 22 Mar 1999 14:28:50 +0100
Message-ID: <14969.922109330@critter.freebsd.dk>
From: Poul-Henning Kamp <phk@critter.freebsd.dk>
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I have just merged the recent modifications to the kernel support
for NTPD from -current to -stable.
We now fully support both XNTPD version 3 (as in usr/src/usr.sbin)
and NTPD version 4 in both -current & -stable.
In fact, we not only support it, we define state of the art
performance when using the pci/xrpu.c driver.
We have only adopted the PLL/FLL section of Dave Mills "nanokernel",
the rest of the stuff is still "timecounter" based.
We have PPS-API support on the parallel port and on the pci/xrpu.c
driver, John Hay has submitted patches to me for PPS-API support
on sio.c (DCD) these will be committed to -current once I have them
tested.
I may experient a bit with hardpps() in -current if I can find the
time, but these experiments will not be reflected in -stable until
some kind of conclusion has been reached. The issue at hand is if
a "normal" 2nd order PLL would do better for precise-phase hardpps()
signals ("prefer peers") Anyone out there with hardpps() able
refclocks are invited to join in on these experients.
If you want to try out the pci/xrpu.c timestamping function, send
me email, I have not committed the VHDL & stuff to the tree yet.
Hope you like it...
--
Poul-Henning Kamp FreeBSD coreteam member
phk@FreeBSD.ORG "Real hackers run -current on their laptop."
FreeBSD -- It will take a long time before progress goes too far!
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