[Asterisk-bsd] MeetMe drift

[David G Lawrence]

> On Sun, 29 Jul 2007 01:35:32 +0800, Dinesh Nair wrote:
> 
> > On Fri, 27 Jul 2007 17:10:07 -0700, David G Lawrence wrote:
> > 
> > >    Attached is a slightly improved version of my ztdummy.c that should
> > > work if system HZ is larger than 1000.
> > 
> > david,
> > 
> > this is excellent. i'll check it out a little bit on the various freebsd
> > boxes we've got, and if it does work, i'll commit it to the zaptel-bsd
> > subversion repository. 
> 
> just a cursory build and test on my hp nc6230 notebook running freebsd 6.2
> shows that your ztdumy gives about 99.53% accuracy as measured by zttest.
> the original ztdummy used to vary from 94% to 99% and was quite
> inconsistent in this regard. more testing is obviously required,
> especially by systems which are not synced with ntp. 

   I don't know how long zttest does its testing, but with a stablized NTP
synced clock, it should be 100% accurate over the somewhat longer term (say
a few minutes). In other words, it should actually be more accurate over
the long term than an un-synced Zaptel hardware timer.

-DG

David G. Lawrence
President
Download Technologies, Inc. - http://www.downloadtech.com - (866) 399 8500
Co-Founder, The FreeBSD Project - http://www.freebsd.org
Pave the road of life with opportunities.