> Date: Wed, 22 Sep 2010 12:05:07 -0400 > From: "Kent A. Reed" <[email protected]> > Subject: Re: [Emc-users] (no subject) or, old system vs new system
> I feel your pain and I know that trying to explain why you have it > doesn't make it go away. A lot of us on this mail list and its companion > developers list have been hoping/struggling/arguing to find a path > forward that minimizes the pain. There's been little enough joy so far. > For what it's worth, I've had good luck so far with an Atom D510-based system running the latest 10.04 LiveCD. I'm using it to run a stepper-based system which needs 16,000 steps per inch, and can run it at 60IPM before the motors stall. Since a larger machine would likely not use 1/4-20 leadscrews, I think this comes close to a worst-case scenario. I flight plan with a latency of 15000us. It occasionally exceeds that, but seems to only be when I throw something big at it like a file copy. I'm using a hard drive right now, but I've tested running it from a USB stick, and I think the latency there is more stable. If I run it with glxgears already running and don't push big files around, it stays under 10k. I've cut a few PCBs on it, which involve fairly complex g-code programs, and didn't see any obvious errors. This setup was purchased new for around $175 shipped from Newegg. $75 for the board, $40 for a chassis/PSU, $40 for 1GB of RAM, $25 for a refurbished HD, and a few odds and ends like this parallel port header cable: http://www.newegg.com/Product/Product.aspx?Item=N82E16812196220&cm_re=parallel-_-12-196-220-_-Product I'm just one person and I may yet run into problems, but I wanted to add a report of this combo looking promising. If there are any other tips besides disabling hyperthreading that will help with latency (e.g. maybe a particular flavor of RAM is better? Would 2GB be better than 1GB?) I'd like to know them, but as it stands, I'm 100% happy with my setup. ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
