From: docs/driver_shm.adoc Is the first paragraph still required, if it doesn't apply to current nrpsec?
And I cant parse the second paragraph, especially the first line. What should I use? Not the ancient method, surely? The _GPSD_ man page suggests setting minpoll and maxpoll to 4. That was an attempt to reduce jitter. The SHM driver was fixed (ntp-4.2.5p138) to collect data each second rather than once per polling interval so that suggestion is no longer reasonable. *Note:* The _GPSD_ client driver uses the _GPSD_ client protocol to connect and talk to _GPSD_, but using the SHM driver is the ancient way to have _GPSD_ talk to _ntpd_. There are some tricky points when using the SHM interface to interface with _GPSD_, because _GPSD_ will use two SHM clocks, one for the serial data stream and one for the PPS information when available. Receivers with a loose/sloppy timing between PPS and serial data can easily cause trouble here because _ntpd_ has no way to join the two data streams and correlate the serial data with the PPS events. -- Sanjeev Gupta +65 98551208 http://www.linkedin.com/in/ghane
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