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Re: [gpsd-dev] double PPS
From: |
Gary E. Miller |
Subject: |
Re: [gpsd-dev] double PPS |
Date: |
Tue, 29 Oct 2013 21:46:23 -0700 |
Yo Eric!
On Tue, 29 Oct 2013 22:52:24 -0400
"Eric S. Raymond" <address@hidden> wrote:
> Gary E. Miller <address@hidden>:
> > There used to be a lockout on that. Any idea what happend?
>
> I see you fixed it.
Probably.
> Meanwhile, I found a reversion that makes the SiRF-III problem
> go away, but at a cost - it may bring back problems with TCP/IP
> and UDP sources. Really fixing this is at the top of my list now.
Cool.
> In descending priority order, my other items are:
>
> * Check if gpsd is eating near 100% of CPU (Greg Troxel's report)
> and if so find out why and fix it. My suspicion naturally falls
> on the PPS monitor loop.
Yeah, weird. UNable to duplicate here.
> * Actually do a complete runthrough of the Time Service HOWTO
> instructions.
Which is why I have been working on chrony, so I can get that part
of the HOWTO cleaned up. As always, getting the time server to prefer
PPS over NMEA time has been a chore. Also have the priveledge dropping
problems again. I prefer to get the code to work, then work on the doc.
> * GR601-W causes annoying flicker in gpsmon. I think this is related
> to the code rapidly flapping between u-blox and NMEA modes, which it
> shouldn't be doing.
I never use gpsmon, but now that you mention it, that is ugly.
> * I want PPS events to be visible in gpsmon. This is half the reason
> I pulled the ntpshm and ppsthread stuff appart, so gpsmon can use the
> latter without involving the former. The other reason was code
> hygiene; as it was that code was entirely too big and tangled a lump.
Well, from my perspective it is now a lot harder to work on. I gotta
flip back an forth between yet more files. Splitting it up into 3 files
is not making it less tangled...
RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
address@hidden Tel:+1(541)382-8588
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