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Re: [gpsd-dev] double PPS

From: Eric S. Raymond
Subject: Re: [gpsd-dev] double PPS
Date: Tue, 29 Oct 2013 22:52:24 -0400
User-agent: Mutt/1.5.21 (2010-09-15)

Gary E. Miller <address@hidden>:
> There used to be a lockout on that.  Any idea what happend?

I see you fixed it.

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.

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.

* Actually do a complete runthrough of the Time Service HOWTO instructions.

* 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 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.

                <a href="";>Eric S. Raymond</a>

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