On Sunday 28 March 2021 20:52:57 Jon Elson wrote: > On 03/28/2021 04:18 PM, andy pugh wrote: > > On Sun, 28 Mar 2021 at 19:40, Jon Elson <el...@pico-systems.com> wrote: > >> I was wondering if there was any possibility that LinuxCNC > >> could support the Beagle Bone and Charles Steinkuehler's > >> driver for the PRU. > > > > I have talked to Charles about it in the past (a few years ago) but > > wasn't really interested enough at the time to experiment. > > > > It looks like the code will just drop into the LinuxCNC tree. But it > > only compiles on the Beaglebone. I don't have one set up here at the > > moment. > > Right, it would take somebody to set up the infrastructure. > > > If you want to try compiling this new branch: > > https://github.com/LinuxCNC/linuxcnc/tree/andypugh/bb_pru > > > > A problem is that with no BBB buildslave, no packages will be built > > by the buildbot. > > Compiling all of LinuxCNC on the Bone would not be as quick > as on a decent X86 machine. > I think it comes out maybe being 1/4 the speed. That's > probably still OK, though. > > Thanks, Andy and Bari for the comments. > > Jon > I, for comparison, I just built the latest git pull on my pi4, getting these times, which I don't quite grok: real 81m28.218s user 133m40.185s sys 30m24.466s
How do I get user+sys at nearly 2x the real which is the same as the actual wall time? =============== But I've a better Q re the pi4. I lost my 1920x1080 screen, degraded now to a 1366x768 a/o about 90 days back, presumably because of some kernel incompatability due to the now 2 yo kernel I built and installed back when the pi was a 3b. So, does debian now have an rt kernel in their buster armhf install, that is newer, and everything works, than the 4.19.71-rt24-v7l+ I've been running the pi4 with for about 18 months? The latest kernels for intel are amazing, the kernel just installed today on my 3 intel i5 boxes shows a servo thread latency of 3.5 u-secs, and the uspace installs are now better than the RTAI stuff from 6 years ago. Mainsteam linux has turned a corner and joined _us_, not the other way around. There has to be a BWG hidden in that. ;-) Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
