On Sun, 2012-11-04 at 12:27 -0500, Kent A. Reed wrote: > On 11/4/2012 10:48 AM, Sven Wesley wrote: > > 2012/11/4 John Stewart <alex.stew...@crc.ca> > > > >> Sven; > >> > >> My D525MW boards are not beside me ATM, but your correction seems to be > >> about right, IIRC. > > And I thought it was high, but I don't have a D525MW here. > > I don't mean to sound snarky, but have you isolated one cpu? > > >> Certainly not blindingly fast, but not too bad either, and little > >> noise/heat. I hope that their lifetime is long in my applications. > >> > >> My numbers, like yours, were higher than seen on the "latency numbers" on > >> the LinuxCNC web site; I wonder if, as you have done, running headless is > >> really the way to go for best latency. > >> > >> I'm thinking seriously about the Mesa 5i25; I'll need one for the spindle > >> encoder for my CNC lathe project. > >> > >> BTW - I'd not bet on Windows to be a secure bet for long term CNC either; > >> don't really know what either LinuxCNC or the Mach camp are going to do a > >> few years down the road. > >> > >> JohnS. > >> > >> > >> > > Thanks John. > > I actually hit near 30 000 ns when I closed a tab i Firefox. If you really > > want to load FF, go to Smartclient.com or Vaadin.com and run the demo sites. > > Seems I've found a good reason to actually have a Raspberry Pi inside the > > cabinet, a perfect X host to unload the controller. > > I'm not in a hurry to replace the controller all of a sudden... > > My thought exactly. I used to use an old Via board as an X server, but > these ARM boards beat it for their modest size and power consumption, > not to mention I can buy 4 or 5 RPis for what I paid for the Via. > > > @Kent, Max base jitter(ns). Shouldn't be ms of course, my bad quick > > spelling slipped and I mean micro and not milli... > > I thought that might be the case, but I read things very literally, to > the consternation of my wife and kids. My grandkids, however, find it > amusing. Well, certainly! That is a result of the way you think and your training. Orders of magnitude do count and not only in paychecks. :-) Think of the differences if our accepted physical constants were (only) one order of magnitude larger or smaller. Yes, wives tend to be that way. Like, "doesn't your head hurt", to which a friend of mine replies to his wife after doing a 'back of the envelope calculation', not any more the thoughts let the pressure out. :-)
> > > The rumour said that the D525MW should be able to make it in the 3-7 micro > > region, seems not possible to me though. > > Like I said, I don't have a D525MW. I did get such decent numbers for my > ASUS AT5NM10-I (Atom D510 equipped) and even my old Intel D945GCLF2 > (Atom 330) did pretty well (based on latency-test reports, of course, > not real world measures as John notes). > > It's seriously annoying to have to test every new board for suitability. Indeed, but that is what pressures us to find a better solution. A static world is unnatural. Thermodynamics wins every time. Dave > > Good luck. > > Regards, > Kent > > > > ------------------------------------------------------------------------------ > LogMeIn Central: Instant, anywhere, Remote PC access and management. > Stay in control, update software, and manage PCs from one command center > Diagnose problems and improve visibility into emerging IT issues > Automate, monitor and manage. Do more in less time with Central > http://p.sf.net/sfu/logmein12331_d2d > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ LogMeIn Central: Instant, anywhere, Remote PC access and management. Stay in control, update software, and manage PCs from one command center Diagnose problems and improve visibility into emerging IT issues Automate, monitor and manage. Do more in less time with Central http://p.sf.net/sfu/logmein12331_d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
