Rod, RTAI Debian packages exist for Bullseye, I packaged them myself. RTAI will never and has never been deployed in upstream Debian. I have an r8169 NIC and don't have any issues with network latency. 5.4 kernel debs would also work for Bookworm but it takes 5+ minutes to reach my desktop screen after booting Bookworm on my 4+ GHz 8-core/16-thread Ryzen CPU so I'm steering clear of it. Bookworm is a total joke right now, I ran sid for years and never had a problem, now both testing/Bookworm and unstable/sid are absolute turds.
> Is this using the RTAI helper package and the uspace build, or some other > sorcery? Andy, For LinuxCNC, a 5.4 RTAI+PREEMPT_RT kernel would work, in theory, with a LinuxCNC RTAI+uspace build, but currently having issues compiling RTAI's mailbox (mbx) module against the RTAI+PREEMPT_RT kernel due to "pointer type stuff." Need someone with more basic knowledge of C to fix problem. Alec On Wednesday, November 9, 2022 at 06:11:33 PM CST, Rod Webster <r...@vehiclemods.net.au> wrote: It's not useful to have RTAI in Bullseye as we don't have any debs for that platform. It needs to target Bookworm so it is deployed to the Debian repos. Also, on the topic of kernels, there is a significant issue with the 5.x and 6.x kernels in Debian which have excessive network latency mostly/possibly only with Realtek NIC's) . This causes an "Error finishing read" on Mesa ethernet devices which disables communications to the board. Some of the NIC drivers in Debian are 15-30% slower than the original Realtek drivers according to some external sources. Some users have found that compiling the 6.1 PREEMPT_RT kernel resolves the issue. Sometimes using a NIC different driver fixes it but rarely. Forum Ref: https://forum.linuxcnc.org/27-driver-boards/46911-mesa-hm2-hm2-7i96s-0-error-finishing-read?start=110 <https://forum.linuxcnc.org/27-driver-boards/46911-mesa-hm2-hm2-7i96s-0-error-finishing-read?start=110> So this issue now rules out all of the popular USFF I am attempting to build deb files of this kernel today, but it's too early to say if it will succeed or if I can even install them. If a resolution is found, consideration should also be given to shipping a PREEMPT_RT kernel deb with 2.9. Rod Webster *1300 896 832* +61 435 765 611 Vehicle Modifications Network www.vehiclemods.net.au On Thu, 10 Nov 2022 at 07:55, andy pugh <bodge...@gmail.com> wrote: > On Wed, 9 Nov 2022 at 21:38, Alec Ari via Emc-developers < > emc-developers@lists.sourceforge.net> wrote: > > > Since there's been great progress with RTAI developments, can RTAI Debian > > package support for Bullseye be a milestone before 2.9.0 makes it's > initial > > stable release? > > > I would like to see that, yes. > > > > I was hoping to have PREEMPT_RT and RTAI work together with the 5.4 > kernel > > so one LinuxCNC package will work on all, but I don't think this is going > > to happen due to about ~5 lines of C code I don't understand. Making 5.4 > > RTAI-only kernel debs will be pretty easy once I have the Kconfig changes > > sorted out for Bullseye. > > > > Is this using the RTAI helper package and the uspace build, or some other > sorcery? > > > -- > 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
