Mesa hm2/hm2_7i96s.0: error finishing read

PCW wrote:

I don't seem to have an issue on my 8300 USDT and a 5.18 kernel
 

Interesting. what NIC card does HP use? This should report it

Intel 82579LM

PCW wrote:

Intel 82579LM

Thanks, I thought HP would use Intel hardware.
That sums it up. The 5.1x kernels are crap with Realtek NIC's with real time.I wonder how we could report that back through Debian or the kernel maintainers?

It seems a bit silly to bring preempt_RT into the mainstrema kernel to be let down by non-realtime network access.

rodw wrote:

PCW wrote:

Intel 82579LM
Thanks, I thought HP would use Intel hardware.
That sums it up. The 5.1x kernels are crap with Realtek NIC's with real time.I wonder how we could report that back through Debian or the kernel maintainers?


 

More data points but i think there must be something else going on as i have issue on all 3 of the below PC`s and 2 have intel NIC, all are resolved by rolling back 4.19 kernel. One thing i have spotted is that PCW is using mint and I am on deb-11, I know they  have similar based but the user space programs are likily to be very different. What version of Mint is it and what spec is your 8300?

All of these running 5.10.0-18-rt-amd64 and linucCNC 2.9 on deb-11 give me  big spikes in read.time

HP Compaq Elite 8300:-
CPU:- i5-3470
NIC:- Intel 82579LM

IMD150D :- 
CPU:- Intel(R) Celeron(R) CPU J1900,
NIC:-RTL8111/8168/8411

MF94 :- Intel(R) Celeron(R) CPU J3455
NIC:- Intel Corporation I211
 

Preempt-RT kernel is used by musicians for anything audio related, probably more using Linux for audio than CNC.
So they do not care much for ethernet as long as internet works.
Although i am sure till 4.n.n kernels they used some other realtime kernel, not the RT we use.
I did test it back then, several of those, did not work for CNC.
Maybe something changed, so testing Ubuntu Studio is a good idea since LinuxCNC can be installed from the Debian repo.
Time, need time....

Its been a while since PCW convinced me to compile the PREMPT_RT  kernel patch  on Mint 17,3 so I could use my 7i76e well before it was  supported by PNCCONF. Thre was no other solution back then.

My recolllection is the musos were quite happy with a low latency kernel which floated around on some muso sites back then. PREEMPT_RT  attracted interest from the automotive industry (BMW springs to mind). This industry threw their not insubstantial development resources at PREEMPT_RT. After all when an air bag has to be deployed you don't want any latency do you?

Recently I wonder if the automotive guys use ethernet for their CANBUS bus through a vehicle. Maybe not, I have no idea.

But by the end of the day (eg. today), PREEMPT_RT won out over the low lateny kernel and is headed to be fully incorporated into the standard LInux kernel one day in the not to distant future.

I suspect that the kernel guys got something wrong by not considering realtime when they combined all of the Realtek drivers into a few software drivers.

I somehow think we have a responsibility to take the  issue forward now we are part of the Debian ecosystem. I'm just not sure of the best way....