On Monday 24 June 2019 05:29:36 andy pugh wrote: > On Sun, 23 Jun 2019 at 19:35, Gene Heskett <[email protected]> wrote: > > So now I have stumbled over RealtimePi from github, which uses any > > raspian.zip file as a src file, and processes it with vagrant to > > build a new, write it to the u-sd card, image that boots to a > > realtime system. Supposedly. > > How is that going? > > I was experimenting with my Pi last night (prompted by randomly making > a machined aluminium case for it, and a hint of "Well, while I have it > out..." and that has a preempt-rt kernel that I built myself. > However, having compiled LinuxCNC, the latency is rather terrible. > (2mS plus). So I may need to re-visit that setup. > > To make space for all this messing about the Pi now has an external > 1TB SSD hooked up on USB.
I got marginally better latency, in the 10 to 20 microsecond region, built on Jessie, but building it on stretch (9.9) has turned into a cast iron bitch. Missing dependencies prevent a successfull configuration of the git clone of linuxcnc-dev, hence the lengthy how do I solve this msgs. As for the RealtimePi build, its running right now, but something is renameing it to realtimepi from picnc. So just once I've set the immutable bit on /etc/hostname, and that works on a reboot. So I am making progress at making an armhf running stretch run linuxcnc but theres a lot of rocks to be moved yet and I could sure use some help. Thanks Andy 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-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
