Steffen, Some good feedback thanks. I'm really not surprised things broke on an update because we compile the kernel from the Raspberry sources at a specific point in the commit tree. It's not a generic Debian build by any means. LIkewise installing a different desktop is also asking for trouble.
Having no sound is also not surprising because in the absence of an audio jack you are dependent on HDMI and I know other SBC's have issues with HDMI sound. If someone has a solution please let me know Please bear in mind that this image is over 6 weeks old and there have been several kernel releases and countless commits to the raspberry pi kernel since then. But for me, the main thing is that it's only in the last few days that the kernel version and the PREEMPT_RT patch align perfectly so I am hoping my next version is more robust. That has never happened in the life of the pi5 before. To test latency on the console, you can install the debian rt-tests package. I have found that our latency-histogram yields similar results. I don't think a single 400 usec spike when opening a browser is of concern. Thats not something you do when running a gcode program. Hopefully I will have some peace and quiet over the weekend to build a new version. Rod Webster *1300 896 832* +61 435 765 611 Vehicle Modifications Network www.vehiclemods.net.au On Sat, 30 Dec 2023 at 21:58, Steffen Möller via Emc-developers < emc-developers@lists.sourceforge.net> wrote: > Heya, > > Not only that we have a RPi4/5 confusion, you managed to add a Rod/b one. > > So, the image Andy pointed to (which I understand has its roots with Rod) > works very nicely. While idle latencies did not exceed 12µs, mostly below > 10. That was truly impressive. Once I got wifi up and initiated some > downloads, it doubled to 24µs, much like the value Andy got. When I started > up firefox and selected youtube, I got a single value of 400µs, though. > > A complaint I have is that there was no sound in the default installation. > The 400µs I like to speculate may be associated with the failed attempt to > perform the respective initialisations. > > Another complaint is that the image is not stable when it comes to > updates. I was curious on the effect that the installation of KDE would > have on the latencies, and if the missing sound would install with it. So I > installed the package "task-desktop-kde" with debfoster. That ruined the > reboot since the expected kernel image was no longer found. I made a > screenshot with my phone and send it to whoever is interested, but my hunch > is that Rod's new image if depending more on Debian's installation will > likely solve such inconsistency issues. > > Do we have any latency tools that would run without X, so we get a > baseline of what software layer is costing us how much? I recall that we do > but latency-test at least does not. I am asking since the latency-sensitive > gaming industry should have some strong incentive to look into what we are > doing but I have not seen too much from them, yet. Ok - this may be > something for another thread. > > Best, > Steffen > > > > Gesendet: Samstag, 30. Dezember 2023 um 04:15 Uhr > > Von: "Rob M" <ozzyro...@gmail.com> > > An: "EMC developers" <emc-developers@lists.sourceforge.net> > > Betreff: Re: [Emc-developers] RPi5 + Raspbian + LinuxCNC latency tests - > first impressions > > > > Umm Rod Old Mate was referring to the my linked images for the RPi4, not > > your ones, the ones I built for other reasons. > > > > On Sat, Dec 30, 2023 at 1:26 PM Rod Webster <r...@vehiclemods.net.au> > wrote: > > > > > >None of those images were for the Rpi-5, I thought the RPi4 in the > file > > > > > > Well yes they are. Andy and Steffan are using pi5 variant of my image > which > > > is used for the 2.9.1 release from here: > > > > > > > https://drive.google.com/file/d/1H_q0Ra-27ZDOhquvq179beUZQNVlex1f/view?usp=sharing > > > Filename (with rpi-5 in it): > > > rpi-5-debian-bookworm-6.1.61-rt15-arm64-ext4-2023-11-17-1520.img.xz > > > It was built for the Pi 5's BCM2712 board. > > > Username: cnc Password: cnc > > > to finalise the installation (wifi, password , locale etc) type: sudo > > > menu-config > > > > > > If the screen resolution is not right, it should be able to be fixed > with > > > a parameter in one of the pi's config files. > > > > > > I have just completed and tested a 2.9.2 installer for X86 on Debian > 12.4. > > > I managed to bypass the raspberry-firmware installation bug in earlier > > > versions (Inherited from Debian) > > > > > > > https://drive.google.com/file/d/1nw0dGt5aZXVo8k68lLf4N_nzc0wTczAg/view?usp=sharing > > > I will also rebuild the images for the Pi4 and Pi5, but I am kernelled > out > > > for today! > > > > > > Rod Webster > > > *1300 896 832* > > > +61 435 765 611 > > > Vehicle Modifications Network > > > www.vehiclemods.net.au > > > > > > > > > On Sat, 30 Dec 2023 at 12:00, Rob M <ozzyro...@gmail.com> wrote: > > > > > > > None of those images were for the Rpi-5, I thought the RPi4 in the > file > > > > name would made the obvious, but as this a topic about the 4 I guess > > > there > > > > could be some confusion. > > > > > > > > As for the recent RPi5 image you tried does that have any issues with > > > > screen resolution? Is it stuck on a single resolution? Does it > detect the > > > > display it's attached to ? These issues, as mentioned previously, a > game > > > > stopper for myself. If they aren't an issue could you say what > > > > kind-brand-model display you're using ? > > > > > > > > > > > > > > > > > > > > > > > > On Sat, 30 Dec 2023, 11:40 andy pugh, <bodge...@gmail.com> wrote: > > > > > > > > > On Sat, 30 Dec 2023 at 00:27, Steffen Möller via Emc-developers > > > > > <emc-developers@lists.sourceforge.net> wrote: > > > > > > > > > > > Andy's image was a success - I just did not know the passwords. > > > > > > > > > > I mentioned it in a previous message, but it is cnc / cnc > > > > > > > > > > -- > > > > > atp > > > > > "A motorcycle is a bicycle with a pandemonium attachment and is > > > > > designed for the especial use of mechanical geniuses, daredevils > and > > > > > lunatics." > > > > > — George Fitch, Atlanta Constitution Newspaper, 1912 > > > > > > > > > > > > > > > _______________________________________________ > > > > > 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 > > > > > > > > > > _______________________________________________ > > > 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 > > > > > _______________________________________________ > 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
