I have been helping test the mesa 7i80 (ethernet). I started with the RTnet setup but what a pain. Supported nics are very limited. When micges switched to rt_preempt there was a watchdog bug that bit the 7i80 (pun intended..) but through all the testing I don't think I once got a realtime delay erorr - that was testing a few different motherboards. I certainly isn't high performance - latency seems to stay consistently under 100us (hovering around 60-80us). Currently .5 to 1ms servo loops are possible. The thought is with some driver tuning - this could get better.
The machines that I have been testing run overnight without any real time delays - peter has had a system running for weeks.. I think it may work well for now. (pretty darn awesome if you ask me - realtime communication over Ethernet ) sam PS - this would not have been possible without the Unified build. - Thanks to all that have worked on it Michael H, John M, Seb (and those I have missed...) On 1/30/2014 2:47 PM, Charles Steinkuehler wrote: > On 1/30/2014 2:14 PM, Michael Haberler wrote: >> Once ethernet level packet I/O is settled as fast enough, we can tu >> to add the minimal IP/UDP framing needed. This will be bare bones (no >> ping, arp, and other amenenities) but should have pretty much the >> same timing behavior and good enough for the task at hand. >> >> these are desk wisdoms, so handle with care. > More "driving from behind the desk", but I've always thought the netmap > folks have a good approach: > > http://info.iet.unipi.it/~luigi/netmap/ > > > > ------------------------------------------------------------------------------ > WatchGuard Dimension instantly turns raw network data into actionable > security intelligence. It gives you real-time visual feedback on key > security issues and trends. Skip the complicated setup - simply import > a virtual appliance and go from zero to informed in seconds. > http://pubads.g.doubleclick.net/gampad/clk?id=123612991&iu=/4140/ostg.clktrk > > > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers ------------------------------------------------------------------------------ WatchGuard Dimension instantly turns raw network data into actionable security intelligence. It gives you real-time visual feedback on key security issues and trends. Skip the complicated setup - simply import a virtual appliance and go from zero to informed in seconds. http://pubads.g.doubleclick.net/gampad/clk?id=123612991&iu=/4140/ostg.clktrk _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
