On Mar 30, 2012, at 1:20 AM, Viesturs Lācis wrote: >> Does anyone know of some known settings to try disabling in CMOS to possibly >> get lower numbers? My 1.0ms Max Jitter is under 9300, but if possible I >> would like to get it even lower. >> > > IMHO it is very good number already. You have max jitter of 9,3 us in > a 1000 us thread, so the max deviance is less than 1%, LinuxCNC will > perfectly handle that. > At the moment I can remember of 2 things to do, if You want to try: > 1) for Intel processors, hyperthreading might be disabled; > 2) for multi-core processors, one or more processors can be isolated > exclusively for real-time tasks with isolcpus parameter; > > http://wiki.linuxcnc.org/cgi-bin/wiki.pl?RealTime
Thanks for your explanation Viesturs! And, that is very interesting! When I run the CPU hog, my max jitter goes down to about 1,000! I would like to set the CPU as instructed, but I have never used grub before. I assume I add "isolcpus=1" to the /boot/grub/grub.cfg file - but I am not sure where to add it. Any suggestions would be greatly appreciated, thanks! Best, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated <http://3DTOPO.com> Phone: 208.462.4171 ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
