Dear Heiko, thanks for your hint.
> You definitely have no ATOM_PPS refclock support in your ntpd but it > looks like your kernel supports PPS and it works fine. Please re-run > configure and check its output. I would suspect that the configure > script looks for certain include files in your kernel header dir(s) and > does not find them. That results in disabling ATOM at configuration time > (can be verified by looking into the generated config.h file of NTP). I checked the configure process but it has no errors, concerning ATOM: "checking ATOM PPS interface... yes" Also config.h shows: #define CLOCK_ATOM 1 And config.log displays: configure:29089: running /bin/bash ./configure --disable-option-checking '--prefix=/usr/local' '--enable-ATOM' --cache-file=/dev/null --srcdir=. ac_cv_var_atom_ok=yes Make shows no serious errors. Cheers, Frank > -----Ursprüngliche Nachricht----- > Von: questions-bounces+frank.burkhardt=fokus.fraunhofer...@lists.ntp.org > [mailto:questions- > [email protected]] Im Auftrag > von Heiko Gerstung > Gesendet: Freitag, 27. August 2010 14:12 > An: [email protected] > Betreff: Re: [ntp:questions] ntptime didn´t show ppssignal > > Hi Frank, > > Am 23.08.2010 14:30, schrieb Burkhardt, Frank: > > Dear Listmembers, > > > > first of all sorry for my bad english, but I'm not a native speaker > and not trained so well ;-) > > > > I tried to get ntpd working with a pps signal (atom driver) under > Ubuntu 10.04 since one week without success. I'm using a self compiled > kernel 2.6.34.3 with pps support and pps_client ldisc built in. "pstest" > shows following data, so I think it is generally working: > > > > r...@chaser:/home/fast# /export/pps-tools/ppstest /dev/pps0 > > trying PPS source "/dev/pps0" > > found PPS source "/dev/pps0" > > ok, found 1 source(s), now start fetching data... > > source 0 - assert 1282565685.198781684, sequence: 352669 - clear > 1282213025.923967757, sequence: 10 > > source 0 - assert 1282565686.198843801, sequence: 352670 - clear > 1282213025.923967757, sequence: 10 > > source 0 - assert 1282565687.198921096, sequence: 352671 - clear > 1282213025.923967757, sequence: 10 > > That shows that your PPS support is working fine on kernel level. > > > I compiled ntpd with --enable-atom option, but when I start ntpd it > shows following error in the log: > > > > 16 Aug 10:36:00 ntpd[17210]: refclock_newpeer: clock type 22 invalid > This clearly shows that you have no ATOM_PPS refclock support. > > > 16 Aug 10:36:00 ntpd[17210]: 127.127.22.0 interface 127.0.0.1 -> > (null) > > > > But i think the problem has maybe nothing to do with ntpd directly so > far, because ntptime shows only PLL, NANO and not PPSXXXX in the status > field: > > > > ntp_gettime() returns code 0 (OK) > > time d01ce7a9.c30c885c Mon, Aug 23 2010 14:27:21.761, (.761910415), > > maximum error 257004 us, estimated error 458 us > > ntp_adjtime() returns code 0 (OK) > > modes 0x0 (), > > offset -42.572 us, frequency 17.326 ppm, interval 1 s, > > maximum error 257004 us, estimated error 458 us, > > status 0x2001 (PLL,NANO), > > time constant 6, precision 0.001 us, tolerance 500 ppm > I do not see this in the output of ntptime on my (PPS-enabled) system, I > guess ntptime does not know about the newer PPS implementation. > > > So is the kernel not detecting the PPS, even though ppstest shows the > signal etc.? > > > > I don´t know how I can proceed, miss I something else, do someone have > any hints for me? > > > > Many thanks in advance and kind regards from Berlin, > > Frank > > > > You definitely have no ATOM_PPS refclock support in your ntpd but it > looks like your kernel supports PPS and it works fine. Please re-run > configure and check its output. I would suspect that the configure > script looks for certain include files in your kernel header dir(s) and > does not find them. That results in disabling ATOM at configuration time > (can be verified by looking into the generated config.h file of NTP). > > Best Regards, > Heiko > > _______________________________________________ > questions mailing list > [email protected] > http://lists.ntp.org/listinfo/questions _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
