Chinese Mesa 7I92 from aliexpress NEW

Changing the IRQ coalesce settings does improve the ping times noticeably on Intel hardware,
but your 4-5 ms  peak ping time indicates other issues, likely related to power management.

My system with Intel MAC and default IRQ coalesce settings:

PING 10.10.10.10 (10.10.10.10) 56(84) bytes of data.
64 bytes from 10.10.10.10: icmp_seq=1 ttl=64 time=0.316 ms
64 bytes from 10.10.10.10: icmp_seq=2 ttl=64 time=0.250 ms
64 bytes from 10.10.10.10: icmp_seq=3 ttl=64 time=0.251 ms
64 bytes from 10.10.10.10: icmp_seq=4 ttl=64 time=0.250 ms

Same system with IRQ coalecing off:

PING 10.10.10.10 (10.10.10.10) 56(84) bytes of data.
64 bytes from 10.10.10.10: icmp_seq=1 ttl=64 time=0.116 ms
64 bytes from 10.10.10.10: icmp_seq=2 ttl=64 time=0.106 ms
64 bytes from 10.10.10.10: icmp_seq=3 ttl=64 time=0.107 ms
64 bytes from 10.10.10.10: icmp_seq=4 ttl=64 time=0.106 ms



Have you disabled all power management in the system BIOS and grub?

Have you set isolcpus to the last CPU in the grub file?

Do you have idle=poll in the grub file as well?

(These are basic latency reducing steps for any LinuxCNC host)

linuxcnc.org/docs/html/install/latency-test.html
 

I ran the rt_setup.sh from this post and it gets worst now i have 6 ms
forum.linuxcnc.org/38-general-linuxcnc-q...irq-affinity?start=0

I disable evething i could in the bios but i dont have irq settings in the bios.

Hello can you share your e-mail, interested in knowing more about your adventure with this board.

Are you sure its an intel NIC? Its unusual to see an INTEL NIC with a enpxxx name.
If you have 2 NICs are you configuring the right one?

Yes, the lspci  list shows the only Ethernet is a Intel LM217

5 ms on Intel most likely means some power management is still enabled
maybe EEE or PCIE

Is this running on a laptop?

This is mini pc fujistu Q920
i disable about everything in the bios.
Still nothing
 
This is my current boot parameters with grub. Edit: I put linuxcnc on miniatx motherboard with intel i5 4460 and realtek RTL8168 ethernet.