Am 10.09.2012 um 18:48 schrieb Jon Elson: > Michael Haberler wrote: >> here's linpack figures for the Rpi and an Intel D525. >> >> the D5252 is almost a factor of 6 faster than the Rpi for this benchmark >> > Thanks much for doing this! Not a great result, though. My feeling is > that the > Atom processors are marginal for LinuxCNC, especially in cases with long > programs or contouring, where the slowness would be more obvious. > So, if the Pi is 1/6th that speed, that will not be good at all. > Exactly how this compares on LinuxCNC, where there is also a lot of > non-FP code, isn't clear. If LinuxCNC was run with the GUI on another > system, it might be OK, and for special projects which are not typical > machines, it might be fine.
Well, I'm not envisaging the whole LinuxCNC thing on the Rpi, but maybe just the HAL/RT backend if so, an interesting question would be: where is the FP performance actually needed most? Interpreter: I dont think so, probably motion. UI a bit for drawing? But that is just a feeling. I'm unsure to qualify "FP-bound" and am not aware of any measurement methods for that maybe a way to approach this is to measure the servo function chain times and see how much that eats into reserves, I guess some timestamps are there already but I've never looked into them -m > > Jon > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
