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23 Mar 2023 00:29 #267339 by phillc54
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08 Apr 2023 00:10 - 08 Apr 2023 00:11 #268566 by PCW
Replied by PCW on topic error finishing read
I have just tested the 6.3-rc5-rt7 kernel and it has improved Ethernet latency
on at least 2 of my test systems: ~4 days LinuxCNC running with YouTube videos
and no more that ~300 usec read tmax and 0 dropped packets at a 1KHz servo thread.

At least on my test machines, it seems as good as 4.19
Last edit: 08 Apr 2023 00:11 by PCW.
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08 Apr 2023 00:29 #268567 by rodw
Replied by rodw on topic error finishing read
Peter. How did you acquire the 6.3 source? Did you download the tarball and  make the ./kernel folder after patching it?

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08 Apr 2023 00:37 #268569 by PCW
Replied by PCW on topic error finishing read
I just built it from source with a script:
 

File Attachment:

File Name: makert6.3-rc5-rt7.txt
File Size:1 KB


(might need to change xconfig to menuconfig if the platform has qt issues)
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08 Apr 2023 01:27 #268572 by rodw
Replied by rodw on topic error finishing read

I just built it from source with a script:
 

Thanks Peter,
I'll try and update my 6.1 debs to 6.3 in the next few days. I just have to get home from Bali first! Not looking forward to the 11:00pm flight tonight!
 

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08 Apr 2023 14:40 #268609 by chris@cnc
Replied by chris@cnc on topic error finishing read
I am building a deb package. In case someone wants to test it.
linux-image-6.3.0-rc5-rt8 
drive.google.com/file/d/1SQqTsNO9b9OnUE9.../view?usp=share_link
linux-headers-6.3.0-rc5-rt8
drive.google.com/file/d/1tOouR9qKzFT1jsY.../view?usp=share_link

In my case, reduce the time not so much, but it's quite okay now...
 
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08 Apr 2023 14:51 #268611 by rodw
Replied by rodw on topic error finishing read
Cool. I am sure Peter's script can be tweaked to avoid the use of xconfig/menuconfig and output Deb's that can be shared.
 

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08 Apr 2023 15:24 - 08 Apr 2023 16:33 #268612 by chris@cnc
Replied by chris@cnc on topic error finishing read
I use "make olddefconfig" form the latest bookworm kernel linux-image-6.1.20-1-rt. And it seems to work
Last edit: 08 Apr 2023 16:33 by chris@cnc.

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14 Apr 2023 20:50 - 14 Apr 2023 20:52 #269032 by rodw
Replied by rodw on topic error finishing read

I use "make olddefconfig" form the latest bookworm kernel linux-image-6.1.20-1-rt. And it seems to work

I'm not 100% sure how things work here but I would be worried about this approach.  Using the old config could bake in Debian's crappy kernel patches we are trying to avoid. We really want the pristine kernel source. This implies you need to make xconfig or make menuconfig to create the kernel config.

Having said that my attempt at using 6.3 sources from git failed overnight... 

There seem to be some changes do dependencies required to build the kernel. We came up with
sudo apt update
sudo apt install -y build-essential bin86 libncurses5-dev pkg-config libssl-dev dwarves bison flex gnupg libelf-dev libssl-dev wget qtbase5-dev debhelper rsync
Last edit: 14 Apr 2023 20:52 by rodw.

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14 Apr 2023 21:15 #269034 by chris@cnc
Replied by chris@cnc on topic error finishing read
I am not able to select everything correctly in xconfig.  is the kernel of linux mint or another distribution better?  maybe I could take this config as a basis?

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