Latency test

NTULINUX wrote:

I was eager to get BTRFS and F2FS squared away...

Installer now supports BTRFS, EXT4, F2FS and XFS.

1 file changed, 402 insertions(+), 32 deletions(-)
 

Super. Give me your adress will send floppy disks.

NTULINUX wrote:

I was eager to get BTRFS and F2FS squared away...

Installer now supports BTRFS, EXT4, F2FS and XFS.

1 file changed, 402 insertions(+), 32 deletions(-)
 
Super. Give me your adress will send floppy disks.
 

Heh, the installer actually works with systemrescuecd but should work just fine with Debian Bookworm (Bullseye not new enough)

Once I have the Gentoo image ready, I'll post instructions on how to use the installer, burn the ISO, etc.

Waiting on the next PREEMPT_RT kernel and there's a bug right now in LinuxCNC git master that prevents it from starting atm. Have yet to test the fix from Seb, but it's a python opengl bug:

github.com/LinuxCNC/linuxcnc/issues/2264

If you install a X11 environment (like XFCE), that bug will not bite you. Its only a Wayland thing.
But Gmocappy probably won't run. It has bigger issues that have not been addressed

rodw wrote:

If you install a X11 environment (like XFCE), that bug will not bite you. Its only a Wayland thing.
But Gmocappy probably won't run. It has bigger issues that have not been addressed

I hit that problem with LXQt and XFCE, been taking a break for awhile. Just so you guys know, touchscreens and touchpads will not work. There's way too many variants and drivers, and I've even seen laptops with conflicting synaptics/rmi4 drivers but both had to be on for it to work. Gmoccapy itself should be fine but the X11 and kernel drivers for touchpads will not be included, unable to test due to no hardware and they're too finnicky.

Stanislavz post=261661 userid=33900 

All night glxgears with youtube. But only one testing thread.. otherwise we have two processes on core optimised to run only one...

I just installed bookworm on an older ASRock H97M Pro4 with G3258 Pentium processor which used to have sub 10k latency but now on bookworm has pushed up to 76k.  I would like to get it back down but most of what you guys have mentioned here is completely over my head.  could you put a single page settings post with your best results for bookworm on 6.1 kernel?  and if you don't mind could you put where the settings can be found?  I am sure many would very much appreciate the testing and results you have found!

Thanks in advance!!

Chris

if its helpful here is some information on my system if you have any suggestions for it specifically

 

I'm really curious about this at24 EEPROM driver..

What happens if you do:

Then reboot? Does everything still work? That would disable the AT24 EEPROM driver, no idea why that's showing up on both your Intel systems but just wondering if it breaks anything noticeable.

Should return nothing after the reboot.

You could try to change the isolcpus=nohz,domain,1 to isolcpus=1
Or add nohz_full=1 or idle=poll
Especially adding nomodeset as Stanislav said helped a lot for me.

Also this helped a bit on mine system to get rid of some spikes.
Option "AccelMethod" "uxa"
In /etc/X11/xorg.conf.d/20-intel...
Or /etc/X11/xorg.conf

Like
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "uxa"
EndSection

You could also try to add these options:
Option "TearFree" "false"Option "TripleBuffer" "false"Option "SwapbuffersWait" "false"

Info from:
​​​​https://wiki.archlinux.org/title/intel_graphics#Enable_early_KMS

The intel related options including nomodeset could work when you see an increase in latency the moment you move a window across the screen or when you scroll on a YouTube page or something 

The installer and Gentoo PREEMPT_RT image is ready for testing:

openlunchbox.com/mw19/index.php/HOWTO:_Gentoo_for_LinuxCNC

The kernel is not as generic as the Debian kernel so please let me know of any missing features or problems.