Patrick Rogers wrote: > Is it possible that the ethernet card is causing the real time > problems? I can't remember for sure, but I may have only encountered > problems while connected remotely. I'll try to find a long ethernet > cable and test over the network again to see if that is the problem. It is VERY possible. Some ethernet controllers do DMA to system memory, a number of cheap plug-in cards have an on-board RAM that is read/written by programmed I/O. If that code is run from device BIOS ROMS on the board, I think it has to run at kernel priority. On-the-MoBo ethernet controllers could use code from the main system BIOS with the same problem.
Running long memory copy loops in the CPU at kernel level could SURE screw up the real time response. Jon ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
