Roberto - There seem to be a lot of replies to your topic but it somehow diverged into a developer conversation.
I think what would help you most is the list that is on the wiki that people contribute latency test result numbers that are associated with their exact setup so that you can see what to expect if you find Brand X, Model Y motherboard with Z memory and A video, etc. It's on the emc2 wiki - http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Latency-Test . I think the information you're looking for is that list as you can see what to steer clear of and what gives really good test results. That's the answer I'd give you - now my personal hardware situation - I am running an old P3 650MHz Gateway motherboard with onboard video and audio and I get a 13000 Max jitter on the fast thread which isnt wonderful, but it runs the mill (a Grizzly X3 using steppers on Gecko drives) just fine - I get 60ipm rapids with no issues running programs. It's a bit slow load a LARGE program and is a little sluggish switching between workspaces (when I'm not running code I switch and hand edit .ngc files in the 2nd workspace so EMC is still in the 1st workspace) but other than that it is fine. I had originally planned to use a 2.4GHz Celeron in a VIA chipset MSI board but that got 18000 jitter. My current desktop (which is soon to be decomissioned) gets a 7000 when I run the trial CD. That has a 2.53GHz P4 3GB DDR, onboard 10/100/1000 LAN and using a Radeon 9600XT video card (forget the memory on the card) - once I finish all the other original parts of my mill (limit switches, pendant, etc.) I'll upgrade that desktop mobo into the mill since it's almost 2x as fast and doesn't show any sluggishness, and loads the same large .ngc files rapidly (nearly instant). I admit I haven't entered my hardware info into the wiki list, which I should - the idea is to have as many people list what they've got and then people starting out have an idea of what they should look for. HTH - sorry for the long winded response. Greg www.distinctperspectives.com ----- Original Message ----- From: Roberto Caminiti To: [email protected] Sent: Friday, November 21, 2008 7:32 PM Subject: [Emc-users] Dedicated hardware for Real Time OS Hi everybody, I see that the newest hardware with frequency tuning and with many advanced features not always give the best performances in terms of latency, used with an RTOS. So now I will ask you... Are there on the market a special hardware designed to be used in Real Time environment? Where? So I think that this hardware is minimal, so I need only: - VGA - one or two PCI slot (for mesa cards) - Serial ports and/or parallel ports - One or two USB - LAN And so without advanced features like bluetooth, wi-fi, HDMI, audio, etc... Thank you! Roberto ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.9.9/1803 - Release Date: 11/21/2008 9:37 AM ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
