[LinuxPPS] refclock_nmea patch

[James Boddington]

Bernhard Schiffner wrote:
> Am Dienstag, 30. Oktober 2007 01:25 schrieb James Boddington:
> ...
>> Compared to freebsd http://www.users.on.net/~boddingt/ntp/freebsd/ on
>> the same hardware linux is performing quite badly. With freebsd I used
>> the default minpoll maxpoll.
> ...
> 
> Hi James,
> 
> nice plot. 
> :-) I'd like to compare it with ambient | CPU temperature .
> 
> (cat /proc/acpi/thermal_zone/...)
> 

I have not been able to get a temperature reading from the cpu but I can get an 
estimate of ambient temperature.

http://aiken.dnsalias.org/cgi-bin/linuxpps now provides plots of offset, drift 
and ambient temperature. Any excursions to -1,827 celsius or more indicate 
something has lost sync. :)

I have also changed line 343 in kernel/time/ntp.c making freq_adj larger trying 
to make the convergence a lot more aggressive.

-- 
    James