On 8/9/2013 10:03 AM, Paul Lacatus wrote: > On 09.08.2013 15:17, Charles Steinkuehler wrote: >> On 8/8/2013 11:00 PM, Paul Lacatus wrote: >>> <...> >>> >>> You can have it , it is not copyrighted ;) . The issue is that I don't >>> understand the problem with realtime error. The load on the linuxcnc is >>> small even I have used X11 tunneling trough ssh . >> Is the LinuxCNC system a BeagleBone? >> >> > No , Charles. I am not so fast . Right now it is an old computer Celeron > 2GHz , 512 MB Ram runing linuxcnc . I will double check the load but I > was feeling when using the Xserver on Windows 7 a lag of executing jog > commands. >
Paul, a while back Jon Elson commented about lags between user input on the X11 server and resulting action in the X11 client, e.g., the LCNC host. I don't believe this is an artifact simply of your Windows-based X11-server lashup although this configuration could be a contributing factor. At the moment, looking at the latency issue remains stuck in my FINO (first in,never out) stack. One caveat for folks tunneling X11 through ssh from low horsepower LCNC hosts. It entails encryption of the X11 traffic and my tests showed the compute burden is significant on my Beaglebone Black no matter the specific encryption algorithm (https://sites.google.com/site/manisbutareed/beaglebone-black-linuxcnc Sorry I haven't added the promised "details later" yet but it's taking me time to recover from a personal calamity). This was the work Dave Engvall alluded to. For these systems I suggest a traditional redirection of the X11 traffic using the well-known DISPLAY environment variable (and typically a few adjustments on the X11-server host as well). It's terribly insecure so be sure the client and server are behind a worthy firewall. Regards, Kent ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
