Contents
As of SVN revision 4427 of the stage 2 software, the STARGRASP controller has included experimental support for synchronising with an NTP server to provide timing for various events. The client can be started via the ntp command.
Startup Performance
Graph showing time offset when client starts, settling time, etc.
Stargrasp Client: Observed Stability
Show time offset when connected to NTP server via 100Mbit and Gigabit, long-term stability, etc.
Linux NTP Daemon: Observed Stability
Show how unstable linux NTP can be?
Attachments
- stargrasp_ntp_startup.png (47 kB) - STARGRASP NTP client startup, added by crae on Wed Oct 10 11:18:09 2012.
- linux_ntp_stability.png (86 kB) - Example Linux NTP performance, added by crae on Thu Oct 11 14:58:35 2012.
- ntp_controller_100mbit.png (135 kB) - NTP time offset of 16 STARGRASP controllers synched to linux NTP server via 100Mbit link, added by crae on Wed Oct 17 15:40:02 2012.
- ntp_controller_gigabit.png (46 kB) - NTP time offset of 16 STARGRASP controllers synched to linux NTP server via 1Gigabit link, added by crae on Wed Oct 17 15:40:22 2012.
- ntp_linux_server_bounce.png (29 kB) - Sudden changes in linux NTP server's reported time offset, added by crae on Wed Oct 17 16:19:57 2012.
- ntp_controller_bounce.png (56 kB) - Ringing in reported time offset of 16 stargrasp controllers after abrupt NTP server time offset changes, added by crae on Wed Oct 17 16:20:54 2012.
