[LinuxPPS] linuxPPS with 64 bits system

[William S. Brasher]

On Thu, 20 Aug 2009, christophe taffoureau wrote:

> Hi,
> 
> For our software, we patched the 32 bits kernel with PPSkit to manage 
> the synchronisation of our application.
> We want to upgrade and improve our software with a 64 bits linux kernel 
> and switch the synchronisation management to LinuxPPS.
> 
> Does LinuxPPS patch support 64 bits kernel ?
> 

A short answer is "Yes, it does." 

I installed LinuxPPS using 64 bit code in the same way as I installed it 
using 32 bit code, and I've had no problems running it on a 64 bit 
machine.



This morning ntp reports:

bill at spectre: $ ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
+GPS_NMEA(0)     .GPS.            0 l    2   16  377    0.000    0.000   0.000
oPPS(0)          .PPS.            0 l    5   16  377    0.000    0.000   0.000

bill at spectre: $ ntptime
ntp_gettime() returns code 0 (OK)
  time ce37c9cd.f7af63ac  Thu, Aug 20 2009  8:10:37.967, (.967520417),
  maximum error 5995 us, estimated error 0 us
ntp_adjtime() returns code 0 (OK)
  modes 0x0 (),
  offset -0.398 us, frequency -146.638 ppm, interval 1 s,
  maximum error 5995 us, estimated error 0 us,
  status 0x2001 (PLL,NANO),
  time constant 4, precision 0.001 us, tolerance 500 ppm,

bill at spectre: $ ntpq -c rv
assID=0 status=21f4 leap_none, sync_atomic/PPS, 15 events, 
event_peer/strat_chg,
version="ntpd 4.2.4p7 at 1.1607-o Fri Jul 31 01:23:48 UTC 2009 (1)",
processor="x86_64", system="Linux/2.6.30.2", leap=00, stratum=1,
precision=-22, rootdelay=0.000, rootdispersion=0.324, peer=30836,
refid=PPS, reftime=ce37c9f4.a1fa0fec  Thu, Aug 20 2009  8:11:16.632,
poll=4, clock=ce37c9fb.8c89a282  Thu, Aug 20 2009  8:11:23.548, state=4,
offset=0.000, frequency=-146.639, jitter=0.000, noise=0.001,
stability=0.000, hostname="spectre", signature="md5WithRSAEncryption",
flags=0x80003, update=200908201020, leapsec=200808080000, tai=34,
cert="spectre spectre 0x0", expire=201006271614