Rainer,

Thank you so much! I will add back in the ACPI power states for software 
shutdown capability and then roll out the 5.4 kernels. The crashing bug was 
actually fixed by Jepler, excessively unloading and reloading RTAI would cause 
crashes. Glad my FPU changes work on Intel!

Alec






On Friday, November 4, 2022 at 12:40:06 PM CDT, Rainer Stelzer 
<r.stel...@sgs-robotics.de> wrote: 





screenshots have been stripped, i guess because of the size .
I put them here:
https://www.ibstelzer.de/startseite/linux-rtai-latency-tests

cheers
Rainer

> Hi Alec,
> first thank you for your time and effort.
> really appreciate it.
>
> I tested with 6 Intel (3x I5 & 3x Atoms)  and 1 AMD CPU on 
> motherboards from different vendors.
> (I've one further Fujitsu Industrial ITX board with a Pentium J5005 
> here, but this insists of booting with UEFI.)
> Attached the histogram screenshots.
>
> I started linuxcnc RIP and picked latency histogram from the menu.
>
> Works fine so far, but in rare cases elapsed time counter stopped 
> increasing, while the other program functions still work.
> So i was able to exit and restart.
>
> Whats very nice, that on all machines starting, stopping and restating 
> programs that use RTAI is no problem anymore.
> That wasn't the case in the past.
> Back then in most cases the machine freezes and had to be rebooted.
> annoying when doing RTAI depending development.
>
> My own RIP Source didn't compile against the new kernel, but it has 
> not been synced to the master for roughly one year.
> Fixing this will be may next task and then I'll switch to the new kernel.
>
> Thanks again.
>
> Rainer
>
>


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