Gentle persons: As a brief summary...
I reset the BIOS on my ASUS AT5NM10-I to nearly default settings, including enabled Hyperthreading. I did leave audio processing disabled. I built and ran the OSADL cycletest (hint: first install the libnuma1 and libnuma-dev packages) with essentially the settings they used to generate latency histograms except I ran it for 30m to get a feel for the test. I get essentially the same results they did. The four threads (2cores+hyperthreading) came in at max latencies 42us, 61us, 61us, 53us. I then ran our LinuxCNC latency-test with a 200us base thread for 30m. Two copies of glxgears were running to give a little loading. I actually got somewhat better max latencies: ca 35us on base and servo threads. Conclusions: 1) the board is probably doing as well as it can with RT PREEMPT and is probably useful with hardware pulse-generators. 2) the latency data on the OSADL website are approximately useful for preliminary assessments. In addition to the systems I compared with my efforts, there are several systems under test there that (only) approximate the boards Charles has tested. The OSADL latencies are within a factor of 2 of Charles' results. Aside: different sites (including our own) use subtly different definitions of latency. It would be useful for someone better versed than I am to illuminate this topic. Regards, Kent ------------------------------------------------------------------------------ How fast is your code? 3 out of 4 devs don\\\'t know how their code performs in production. Find out how slow your code is with AppDynamics Lite. http://ad.doubleclick.net/clk;262219672;13503038;z? http://info.appdynamics.com/FreeJavaPerformanceDownload.html _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
