> I'm trying to place your 30us latency number in context. What > motherboard/bios/cpu? >
This is a new Intel DH61AG mini-ITX motheboard with an Intel Core i3 2120T 2.6 GHz LGA1155 CPU. It has 4G of ram and a 60G SSD disk. With HyperThreading turned off from the BIOS, and specifying isolcpus=1 in grub I seem to get around 14us mostly, but still the occasional 30us latency. The latency-histograms Michael had measured would really tell the whole story as I feel the 30 or 35us occasional spikes are quite rare. Any other BIOS/xenomai/linuxcnc tuning that I should try? For my application a 1ms thread will be enough, so I can probably live with 35us, but it would be interesting to see if 15us is attainable easily. > cpus, real and/or virtual). I recently reported latency measurements for > a variety of configurations on my Quad-core AMD Athlon II box > ( > https://sites.google.com/site/manisbutareed/linuxcnc-2-5/xenomai-user-threads > ). > nice page, more of that please :) As I said before collecting this kind of data automatically into a web-browsable database would be nice. Anders ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
