Latency, error finishing read, and IRQ affinity

The i915 driver supports basically all Intel graphic chips except the GMA500 series

That kernel command line is fine

Mozmcks script requires editing to match your IP address setup
or it will not setup the irq mask.

Note that my simple script just sets the mask temporarily and would
need to be re-run after re-boot. In addition, if irqbalance is not disabled
the mask setting  will be eventually undone by irq balance.

The main point of my script is for testing

I thought I had, I edited the section with the IP address to my card IP address of 10.10.10.11. Obviously I’ve made a mistake, I’ll go back through it again to see.

Yeah, A bit of error/status reporting would improve that script

I think I see my mistake, I only changed the second instance (line 145) to 10.10.10.11 and overlooked line 117. Sorry for the trouble and thanks for the help!

I knew it was something I had missed. Odd that the old debian 10 vanilla install just worked, but the debian 12 was so finicky about having the cpu isolated and irq pinned.

Yes, I think  some kernel change made Ethernet latency more sensitive to IRQ pinning