Brief report on testing Johns Xenomai debs from his repo Installed into a Ubuntu 12.11 install Intel Quad core 2.3GHz (Q8200) This is not a workshop machine, it is my development and testing one in the house. It has never returned good figures with the 2.6.32-122 kernel
Delighted to report that linuxcnc 2.6~pre from Michaels repo builds and runs fine Latency test as is 18228 base thread 17358 servo thread with 4 instances of Glxgears, internet use, window moves, file IO etc Suprisingly with isolcpus=1,2,3 Latency test 18711 base thread 17314 servo thread with 4 instances of Glxgears, internet use, window moves, file IO etc I heavily tested this machine a couple of years back, compiling all sorts of rtai kernels and comparing results. Using a stock 2.6.32-122-rtai kernel and 10.04 it returned about 32K base thread I got that down to about 15K by turning off 3 cores in BIOS, but at the expense of performance, it ran like glue though a sand dune! The best I achieved playing with kernel configs and magma configs was about 24K and still very usable I have also previously experimented with isolcpus=1,2,3 AND acpi_irq_nobalance noirqbalance You could show that all the processing and IRQ handling had moved to core 0 but performance did not improve Congratulations to John, very easy to install following the instructions on the wiki, then just need the usual build tools to compile Michaels branch of the xenomai enabled master. More importantly better figures than from the current stock rtai kernel Now currently testing a P4 machine similar to those in the workshop. regards ------------------------------------------------------------------------------ Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! Learn more. http://p.sf.net/sfu/sophos-d2d-feb _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
