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after installing the driver run this to check that it is the right one being used:
sudo lspci -v
under Realtek controller check Kernel driver in use, it should be r8168. (see attached screenshot)

to avoid problems i suggest to blacklist the r6169 driver completely in grub by adding: modprobe.blacklist=r8169

or, since your pc looks similar to mine you can add the whole my line to /etc/default/grub which through trial and error i found the most stable:

GRUB_CMDLINE_LINUX="irqaffinity=0-1 kthread_cpus=0-1 isolcpus=domain,managed_irq,2-3 rcu_nocb_poll pcie_aspm=off r8168.aspm=0 r8168.eee_enable=0 modprobe.blacklist=r8169,mei_txe"

don't worry it will not kill your pc  it just rebalance your cores to do different things. 

dont forget to run "sudo update-grub" to update grub configuration otherwise you won't see any changes after restart.

also check sudo dmesg for any errors during boot.

having 1.2ms ping once in a blue moon won't kill you. i suggest to add "grep -v time=0." to see how many actual pings you got over 1ms.

i normally run something like this:

sudo chrt 99 ping -i 0.001 -q 10.10.10.10 -c 1800000 | grep -v time=0. 

this will run ping for 30 minutes with 1ms pings and only show you the pings that took longer then 0.999 ms.

if you see only one or two 1.2 ms in 30 minutes it is not a problem, 8ms is super bad though. 

have fun!

I wonder how the were inserted? Thank You , I will try it tommorrow.

[TRAJ}Axis XAxis YDelete .ini from those lines.

 
This is the .ini that I modified while working on the Z Axis Homing . 

Bumped into this today:
- Linux is a tool you use to extract value from your hardware.
- Windows is a tool Microsoft uses to extract value from you
-
Original comment here

User name @neilbrideau8520

Go give the man some likes.

Were are the error files located ? var/ Error ? This ubuntu is very unfamiliar to me .

Thx Peter. Really appreciate your help. Last question …. Can you tell if my realtek nic is using the dkms driver or not? I attached the output of a script that you posted somewhere.Like I said in the first posting, I didn’t know that Linux headers might have been necessary when I installed dkms.  

Might be usable with a 2 ms servo thread.

I would check how LinuxCNC runs now

 

Alright. I applied that command in the grub configurator, rebooted and ran the pinIRQ script again.
ping times look much better (dropped from 8 to 1.2), but I am still too high... right?

first

sudo ./pinirq.txt enp1s0
Cores: 4
Old CPU Mask: f
Set device enp1s0 IRQ 121 CPU mask to 8

then

cnc@linuxcnc:~/gcodes$ sudo chrt 99 ping -i .001 -q 10.10.10.10
PING 10.10.10.10 (10.10.10.10) 56(84) bytes of data.
^C
--- 10.10.10.10 ping statistics ---
142832 packets transmitted, 142831 received, 0.000700123% packet loss, time 143400ms
rtt min/avg/max/mdev = 0.056/0.108/1.211/0.035 ms