On Monday 03 December 2012 15:28:25 Sven Wesley did opine: > 2012/12/3 Dave <[email protected]> > > > D525MW > > I assume that you guys using the D525MW board also is using a Mesa > board. I have two D525MW's and if you ask me their performance is > really poor. I don't have to push it at all to reach latency values way > above 50 000 ns. With a Mesa board yes, without no. > > /S
Sven, 2 things you MUST do. 1. Turn off the hyper-threading in the bios. 2. Add isolcpus=1 to the end of the grub kernel line. With those 2 things, I flat cannot get a jitter of over 7.5 microseconds, and I can run a 23 microsecond BASE_THREAD for hours before getting that little advisor that said the latency was exceeded. And I have yet to have a motor stall that I didn't first tell it to turn 800 or more rpms. At a 25 microsecond BASE_THREAD, I have never seen a latency notice. Slow? Only if you are microstepping at divisors above /8. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! To manage Apache modules use "a2enmod" to enable and "a2dismod" to disable. e.g. 'sudo a2enmod rewrite' I was taught to respect my elders, but its getting harder and harder to find any... ------------------------------------------------------------------------------ Keep yourself connected to Go Parallel: BUILD Helping you discover the best ways to construct your parallel projects. http://goparallel.sourceforge.net _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
