Hi Dave, good feedback. I have had the pi running for several days now without a hitch. Due to my dynamic IP (pending a static ip), you can find the pi and associated ntp server at:
http://secondthoughts.no-ip.org I made a small realtime time-series plot and a page displaying ntpq info so I can more easily review performance. I fully intend to use serial GPS+PPS when it arrives (slow boat from china), but will continue to build the web site for monitoring the service in the meantime. I am currently building the web page to add additional ref clocks. I do se occasional spikes in the offset. you can see them in the timer series plots which are based on loopstats files. I would hope they disappear when I have pps. I am not sure if this is pi/ethernet or the refclock (which is not close-by). My final use-case is on our internal LAN's at work where we have a GPS unit always on hand, but this is a homework project right now, so the going is a bit slow. I have not seen any lockups yet, and will try to keep it running as long as possible without a reboot. If you have seen it, I am sure it will pop up for me as well. If we get them, the pi is a showstopper for me. regards pk -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of DaveB Sent: Wednesday, 29 August 2012 4:32 PM To: [email protected] Subject: Re: [ntp:questions] Have Pi, have GPS = low powered NTP server? In article < [email protected]>, [email protected] says... > > Hi, > I have my pi running on the web right now at http://121.221.94.250/ > > I made a small web site to expose various parameters in realtime. > Still waiting for my gps unit, but I am pretty happy with millisecond > from live internet sources. PPS is next. > The website needs a little more polish, but the basics are there. http://121.221.94.250/ Unreachable, 08:19 UTC Wednesday 29th August. I've seen on another site, that people using the chipset based serial port with GPS and other devices, and have *Much* better results than when using a USB hosted serial port. There are still issues with the Pi's network port, as that aparrently is a USB driven device on board, resulting in more latency than might be expected otherwise, and some extra variability too. I also found that the Pi would lock up and need a power cycle, if left running the default NTPD service for anything more than two or three days. It was predictable and repeatable, but I've not tried updating the OS (or NTP) and doing that again. That was using the original Debian distro for the thing. At this exact time, it's back in it's box while I make room for it by doing other things, much more important according to domestic management. I have other plans for it. Regards. Dave B. _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
