Re: [gpsd-dev] [PATCH 3/3] Print offset in ntpshmmon instead of reference time

[Gary E. Miller]

Yo Miroslav!

On Thu, 14 May 2015 17:06:23 +0200
Miroslav Lichvar <address@hidden> wrote:

> On Wed, May 13, 2015 at 11:47:18AM -0700, Gary E. Miller wrote:
> > On Wed, 13 May 2015 10:47:55 +0200
> > Miroslav Lichvar <address@hidden> wrote:
> > > Why not? I'd prefer a solution where no information is lost too,
> > > but in this case I don't think it really matters.
> > 
> > But it does matter.  Those last bits of precision had real
> > information in them.  
> 
> Information that pystripchar will be able to show? In a window that
> maybe has resolution of 8-12 bits?

Of course it does.  PPS drift is way down near the noise.  I have
hosts where the offset is under 1 microSec.  If you have already lost
that last microSec by converting the clock and PPS times to floats
before subtracting them then you just end up with noise.

> > If you prefer better, why do you argue for less, when better is so
> > easy?
> 
> Well, it doesn't look so easy to me. :)

Then check out my chnages to the strip chart program.  Almost trivial.

> > NA.  I already fixed pystripchart.
> 
> Hm, ok. Where is the repo? In the CVS I found on sourceforge last
> commit was made 11 years ago.

Yeah, some old and dead copies around.  Go here:

    http://git.savannah.gnu.org/cgit/gpsd.git

RGDS
GARY
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