Are you perhaps associating the wrong run count and run times log entries? In the four-line log snippet you show I believe the middle two entries would be associated with each other. I see the times between divided by runs between to be quite stable. I have run the latency tests and get about 8000 ns on this 525mw with hyper threading disabled and the other recommended tweaks.
Scott On Jul 1, 2012, at 11:38 AM, Jon Elson <el...@pico-systems.com> wrote: > Scott Hasse wrote: >> Jun 30 17:48:41 scott-desktop kernel: [ 4078.255547] ENCODER runs between: >> 60 >> Jun 30 17:48:41 scott-desktop kernel: [ 4078.256330] ENCODER time between: >> 796760 >> Jun 30 17:48:41 scott-desktop kernel: [ 4078.256344] ENCODER runs between: >> 40 >> Jun 30 17:48:41 scott-desktop kernel: [ 4078.257366] ENCODER time between: >> 1035788 >> > It appears you have really large real time jitter in this system. It > could be either the base thread or the servo > thread, not completely sure. But I see about 30% jitter on the time, > and 50% on the runs! That will make any control loop > malfunction badly. Have you run the latency tests on this system? > > Jon > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
