LinuxCNC S-Curve Accelerations

@Rodw,

Thank you for your effort, all your input so far.

I have tried to create a .iso for day's, using the lb build system and also by using a chroot environment.
However it failed at some point when the .iso installation was ~60% complete.
Also the linuxcnc live build failed at some point, it had something todo with filmware, but that's no problem.

Then creating .deb packages is also a lot off work. As you have at least 2 types. The normal packages and the -dev packages
wich includes .headers etc.
I think we have to use 3 types, like the normal, the -dev and the -source.

For now i use a Qemu vm. Install debian and the software we need. Then the Qemu .img file can be compressed and
downloaded by others to test in their vm.
For running on real machines, i have to do a extra conversion step from .img to other .img type,
then write the .img to usb, and it will run.

Glad you waded into the live build environment. Wait till I get you going on the raspberry Pi 
Sorry it failed for you.. I had plenty of that. The biggest issue I had was getting apt configured and installing the gpt keys.
Bjarne from Etherlab was a big help there.

I think Linuxcnc builds all of the Debs in the one go.
There was a really interesting pull request from Stefan Moller that has yet to be committed which installed the dependencies the Debian way (eg. Just using one command. It would have been nice to see it in the code by now.

Hi all,

For info.
The distro is updated to use Debian 13 and linuxcnc scurve + ethercat.
There where some problems to get ethercat running on linuxcnc, these are now solved.

repository.qtpyvcp.com/repo/linux-distro/

The debian-disk.img.7z is to use directly in qemu vm.
The debian-raw.img.7z is to be copied to usb.
 

Hi,

the latency debian 13 is very bad.
We have to come up with an idea to
solve this.
 

Grotius wrote:

Hi,

the latency debian 13 is very bad.
We have to come up with an idea to
solve this.

 

Latency or network latency?

HI Rod,

A tester send me this :
Debian 10 : jitter max 45200
Debian 12:jitter max 29000
Debian13:jitter max 522000

Ir looks very bad.

The used kernen in debian 13 :
linux-image-6.12.21-rt-amd64

I havent done the latency myself so far.
For the tester i will make a debian 10 with his current kernel.

But somehow we need a better kernel for debian 13. This looks not usable at all.

Grotius wrote:

HI Rod,A tester send me this :Debian 10 : jitter max 45200Debian 12:jitter max 29000Debian13:jitter max 522000Ir looks very bad.

I think something is wrong with his setup. He needs to review my Google drive doc to optimise the  performance.I thought I had Debian 13 running here at home but it is on my work computer.But even so,  his Debian 12 latency seems high. Ethercat is installed on this PC 
 

Please ignore the custom kernel here but follow all other optimisations
docs.google.com/document/d/1jeV_4VKzVmOI.../edit?usp=drive_link

There are many new features like energy efficient Ethernet that need setting for best latency