Neue Hardware und schlechter Latency Test

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28 Jul 2023 10:51 #276451 by WKS-3D
Erstmal ein Gruß in die Runde,
mein Name ist Olli (Oliver), 54 Jahre jung, seit 35 Jahren CNC-Fräser und ich bin neu in Sachen LinuxCNC. 
Ich habe Debian 12 und LinuxCNC mit dem Probe Basic Screen Lathe installiert, soll halt für ne Drehmaschine sein.
Hardware ist ein Mini-PC Fujitsu Esprimo Q956 mit Core i5-6500T und 16 Gb RAM.
Nach der Installation habe ich den Latency Test gemacht und der war grottig
 
Im BIOS habe ich alle Stromsparfunktionen abgestellt.
Was kann ich sonst noch tun?
Besser auf eine andere Hardware umsteigen?

Danke und Gruß
Olli
 
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28 Jul 2023 12:12 #276453 by tommylight
Das ist die normale kernel, braucht die RT kernel.
-
That is the normal generic kernel, it needs the RT kernel to run machines.
What DE version (Mate, xfce, gnome) ?
Did you install from the net ISO or from a DVD/CD ISO image?
When installing LinuxCNC, did it fail with errors pertaining to mising "raspi" stuff?
-
Turn on the PC, hold down the Shift key, at the GRUB menu enter "Advanced options for .... " see if there is an entry containing RT in the name, choose that and press enter. Now do a latency test.
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28 Jul 2023 12:46 #276457 by rodw
try:
sudo apt install linux-image-rt-amd64
and reboot

Also refer to: linuxcnc.org/docs/2.9/html/getting-start...etting-linuxcnc.html
 
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28 Jul 2023 13:08 #276461 by WKS-3D
thank you for answering but the installation ends with:
"Sub-process /usr/bin/dpkg returned an error code (1)"

I will reinstall the system again

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28 Jul 2023 13:11 #276462 by WKS-3D
Thank you,
ok, I thought it was the right kernel, that explains a lot of things of course.
I use xfce4. I don't remember which image I took, but I think it was the small installation image.
The advanced options don't show any RT

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28 Jul 2023 14:11 - 28 Jul 2023 14:12 #276465 by tommylight
Solution:
-Open terminal
-type sudo caja
-open /etc/ folder
-Press ctrl+f and type z50*
-it will find 3 files, delete all 3
-do a sudo apt upgrade again
Everything works, so far.
Reboot.
EDIT:
If using xfce
sudo thunar
instead of
caja
Last edit: 28 Jul 2023 14:12 by tommylight. Reason: more info
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29 Jul 2023 08:00 #276515 by WKS-3D
Error fixed, it was of course due to the non-existent Real Time Kernel.
 

I have completely rebuilt the system.
Thanks again for your help

Olli


Fehler behoben, es lag natuerlich am nicht vorhandenen Real Time Kernel.
 

Ich habe das System nochmal komplett neu gemacht.

Vielen Dank nochmal fuer eure Hilfe

Olli
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29 Jul 2023 09:07 #276517 by WKS-3D
There are still peaks
 
In the BIOS, everything that has to do with speed step, energy management or is unnecessary is turned off.
C-Step in BIOS is C0, smaller is not possible.
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29 Jul 2023 11:16 #276519 by tommylight
If you plan to use Mesa boards, try
latency-histogram --nobase --sbinsize 1000 --show
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29 Jul 2023 13:50 #276525 by WKS-3D
Yes, Mesa Boards,
7i92TM -> 7i76 -> 7i85
Ok I will try that, but it will take some time because I still have to build the machine, but I want to finish the software so that it is ready to use.

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