[LinuxPPS] cross posting [time-nuts] NTP API on Linux 2.6.26

[Folkert van Heusden]

> > Odd. I still get:
> >
> > belle:/usr/local/src/ntp-4.2.4p6# /usr/local/ntp/bin/ntptime
> > ntp_gettime() returns code 5 (ERROR)
> >   time cd14bd4c.3240a000  Sun, Jan 11 2009 19:47:40.196, (.196299),
> >   maximum error 9016 us, estimated error 16 us
> > ntp_adjtime() returns code 5 (ERROR)
> >   modes 0x0 (),
> >   offset -26.000 us, frequency -3.138 ppm, interval 1 s,
> >   maximum error 9016 us, estimated error 16 us,
> >   status 0x40 (UNSYNC),
> >   time constant 4, precision 1.000 us, tolerance 500 ppm,
> 
> Ntp is not synced yet.  Until ntp has SYNCed ntptime will report precision = 
> 1.000 us even if ntp is capable of NANO mode.  Either your refclock is not yet 
> working or you didn't wait long enough to run this.  It is also possible that 
> you are not picking up the correct timex.h file during the build. You need to 
> have a look at the config log to confirm which file is used.

Ok verified that:
gcc -DHAVE_CONFIG_H -I/usr/local/src/timex.h -I/lib/modules/2.6.26-pps/build/include -I/lib/modules/2.6.26-pps/build/Documentation/pps  -I. -I. -I..  -I../include -I../include -I../libopts 
-I/usr/include  -march=nocona -O2 -m64 -mno-sse3 -DHAVE_PPSAPI  -Wall -Wcast-qual -Wmissing-prototypes -Wpointer-arith -Wshadow -Wstrict-prototypes -MT ntpd.o -MD -MP -MF ".deps/ntpd.Tpo" -c -
o ntpd.o ntpd.c

also:
belle:/usr/local/src/ntp-4.2.4p6# ls -l /usr/local/src/timex.h/
total 8
-rw-r--r-- 1 root staff 6567 2009-01-10 15:46 timex.h

but:
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*GPS_NMEA(1)     .GPS.            0 l    3   16  377    0.000   -0.031   0.012
... etc....
 ntp.nmi.nl      .IRIG.           1 u   45   64    7   12.447   74.570   0.768

ntp_gettime() returns code 0 (OK)
  time cd14e020.7a3a7000  Sun, Jan 11 2009 22:16:16.477, (.477454),
  maximum error 2073 us, estimated error 217 us
ntp_adjtime() returns code 0 (OK)
  modes 0x0 (),
  offset -30.000 us, frequency -3.065 ppm, interval 1 s,
  maximum error 2073 us, estimated error 217 us,
  status 0x1 (PLL),
  time constant 7, precision 1.000 us, tolerance 500 ppm,


Folkert van Heusden

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