I hadn't seen this mentioned on the list, but maybe I missed it, or I read it and my old brain forgot.
I had a few old used PCs that I purchased for LinuxCNC 2.5.x. I ran the latency test before buying them and the results were fairly good. Then I decided to standardize on Atom motherboards for all of my little CNC projects. I donated a PC to a friend, he installed LinuxCNC 2.7 from the latest LiveCD and had horrible latency issues. I made a LinuxCNC house call and saw maximum jitter greater than 500,000 ns. We did the updates to everything and the jitter dropped to around 12,000 ns, a little better than I originally saw with LinuxCNC 2.5.x. His little C-Beam Machine desktop router is now humming along nicely (and noisily). I'm a little interested in why the latency was so bad before updating, but mostly I posted this so people would know to run the updates before doing the latency test, and would realize that running the latency test from the live version running off a USB drive wouldn't be a proper test of whether a PC is a good candidate for LinuxCNC. ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
