You could try this image that contains preempt_rt for the Pi 5 (Linuxcnc 2.9.1) https://drive.google.com/file/d/1H_q0Ra-27ZDOhquvq179beUZQNVlex1f/view?usp=drive_link I don't have a Pi5 to test it but others say it worked.
This is an updated image from our Raspberry Pi 4 one that is built for the newer Pi 5 CPU sudo apt upgrade should update to 2.9.2 Rod Webster *1300 896 832* +61 435 765 611 Vehicle Modifications Network www.vehiclemods.net.au On Thu, 28 Dec 2023 at 06:46, Sebastian Kuzminsky <s...@highlab.com> wrote: > On 12/27/23 13:38, Steffen Möller via Emc-developers wrote: > > > >> Gesendet: Mittwoch, 27. Dezember 2023 um 17:13 Uhr > >> Von: "andy pugh" <bodge...@gmail.com> > >> An: "EMC developers" <emc-developers@lists.sourceforge.net> > >> Cc: "Steffen Möller" <steffen_moel...@gmx.de> > >> Betreff: Re: [Emc-developers] RPi5 + Raspbian + LinuxCNC latency tests > - first impressions > >> > >> On Wed, 27 Dec 2023 at 15:20, Steffen Möller via Emc-developers > >> <emc-developers@lists.sourceforge.net> wrote: > >> > >>> My RPi5 arrived over Xmas and I just fired it up, was offered to > install LinuxCNC directly from what we offer in Debian, and then ran > latency tests. Graphics (as in video but also the extra art from your X > interface when ALT-tabbing through your applications) have the most effect > on the latency. I/O from the SD does not seem to affect it too much. > >> > >> The numbers you show are _awful_ though? > >> > >> It doesn't look like the LinuxCNC installation has installed the > >> correct kernel. (I seem to recall that I had to do a fair bit of > >> fiddling to make it happen, it's a Pi thing) > > > > Rebooted with > > Linux version 6.1.0-rpi7-rpi-2712 (debian-ker...@lists.debian.org) > (gcc-12 (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) > #1 SMP PREEMPT Debian 1:6.1.63-1+rpt1 (2023-11-24) > > but do not see any relevant change. > > That's the wrong kernel: "PREEMPT" is not enough, you need "PREEMPT_RT" > in the uname string. > > This is usually the difficult part of getting systems with out-of-tree > vendor-specific kernels to work well with LinuxCNC. > > > -- > Sebastian Kuzminsky > > > > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
