Re: [Emc-users] latency-test Results .avi makes the numbers huge
you might look for different video drivers? I dont know what chipset you have or if its onboard or a card or what, but maybe it would affect cpu usage to play the video? On Mon, Dec 22, 2008 at 10:39 PM, Jeff Epler jep...@unpythonic.net wrote: After identifying things that cause large latencies, one possible solution is to simply remember not to do that thing--at least if it's something easy to not do, like start viewing a movie. One nice thing about servo systems with hardware encoder counting is that after a large latency, you'll get a following error but retain position. With steppers, a large latency means you probably stall the motors and lose position. Jeff -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] latency-test Results .avi makes the numbers huge
Hi, I bought an Asus P5LP-LE MB. I want to use this for emc2. My machine is a a milling machine with DC servo motors. I am going to replace the Heidenhain TNC 151 with the emc2 control. I have been running the latency test on the MB. The best I have been able to do when running the test for many hours (2h to 8h) is: Servo Thread 14602 nS max jitter Base Thread 18487 nS max jitter. My understanding is that these numbers should be good for use with servo motors. When running the latency-test I also ran glxgears, firefox looking at youtube videos, view jpg pictures resize, minimize and restore windows etc. There is just one area of concern. If I also open and view an .avi file the jitter jumps to a huge number (like 20) when the .avi window is opened or closed. Otherwise the numbers above are what I see. Should this really be a concern? I don't plan on viewing .avi files when running a cnc machine. I like this MB because it has 3 PCI slots so thee is plenty of room for expansion. I plan to place the latency-test results in the wiki. Other details: Chipset Intel GMH 945G + ICH5 Processor P4 - 3GHz PCI Expres X16 3 PCI RAM 1G Ubuntu 8.04 John Figie -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] latency-test Results .avi makes the numbers huge
On Mon, 2008-12-22 at 15:51 -0800, John Figie wrote: P5LP-LE According to this manual: http://dl.getdropbox.com/u/16022/Screenshots/leonite_manual.PDF this board has integrated graphics that share main memory with the CPU. My guess is that's your problem. Thanks, Matt -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] latency-test Results .avi makes the numbers huge
After identifying things that cause large latencies, one possible solution is to simply remember not to do that thing--at least if it's something easy to not do, like start viewing a movie. One nice thing about servo systems with hardware encoder counting is that after a large latency, you'll get a following error but retain position. With steppers, a large latency means you probably stall the motors and lose position. Jeff -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
