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I am running 7i76e with linuxcnc 2.8.4 for a engraving router for a year now and today it started to give a fault while machining(file attached). After 5 minutes it stopped working entirely and gave me a warning at the start saying input-08 is not plugged in. I removed the number 8 from Pncconf and tried again but then it was input-09. I removed all of them it was the spindle, after the spindle machine turned on. XYZ axis work no problem but nothing else. I then swapped the 7i76e from a different machine that I have and problem was solved. Is my card dead or is there something that I can do?

preempt=full quiet splash kthread_cpus=0-1nosmt=force irqaffinity=0-1 rcu_nocb_poll rcu_nocbs=2-1 lapic=notscdeadline igb.EEE=0 hpet=disable i915.i915_enable_rc6=0 i915.powersave=0 skew_tick=1 intel_idle.max_cstate=1 intel_pstate=disable amd_pstate=disable amd_idle.max_cstate=1 cpufreq.off=1 cpuidle.off=1 idle=poll processor.max_cstate=1 isolcpus=2-3 idle=poll pcie.aspm=0 r8169.eee_enable=0 pcie_aspm=off

Try a few settings abviosly mo realtek goods on yoga

Yes default, but did do updates and got kernel 6.8.0-48.
A few cmd line params incl isolcpus.
been running on old asus i5 2nd gen for a week now.... no errors.
Thread at 800000.
Funny also realtek nic with stock r8169 driver

seems like we heading to a brighter rt future.
Hopefully no more compiling kernels and chopping in drivers etc.

Testing this right now on a Lenovo ThinkPad Yoga 370, just added isolcpus=2-3 to boot options, still excursions after a while on batteries.
Stay tuned, testing isolcpu=3-4 now

Is that the default mode?
I did test with stock Mint22, but the latency was not ok, and i waguely recall mentioning Dynamic somewhere, but i had no isolcpu in use.
Will have another look later, thank you.
BTW i did install 6.10RT and that works, did not boot with 6.11 or 6.12 at all.

7i76 oder 7i76E?
Die 7i96S hab venig IO und es gibt beim eusurplus.com immer, nem ein 7i84 mit 32 eingange und 16 ausgange und einfach zu verkablen.

  cnc@cnc:~$ uname -a
Linux cnc 6.8.0-48-generic #48-Ubuntu SMP PREEMPT_DYNAMIC Fri Sep 27 14:04:52 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
cnc@cnc:~$ linuxcnc
LINUXCNC - 2.10.0~pre0
cnc@cnc:~$ sudo chrt 99 ping -i .001 -q -c 20000 10.10.10.10
[sudo] password for cnc:    
PING 10.10.10.10 (10.10.10.10) 56(84) bytes of data.

--- 10.10.10.10 ping statistics ---
20000 packets transmitted, 20000 received, 0% packet loss, time 20034ms
rtt min/avg/max/mdev = 0.047/0.050/1.014/0.007 ms

cnc@cnc:~$ latency-histogram --nobase --sbinsize 1000







 

what about the availability? i haven't been active here for a long time. 2 years ago the 7i76e was not available, currently it is not available either. did it ever come back? or should i better use another card? i already have some 7i76s in use and would like to use the same hardware on all machines...

wie ist das mit den 7i76? kommen die irgendwann wieder bei Mesa, oder sollte man auf etwas anderes wechseln?

PCW wrote:

It's not a issue with Intel MACs
If you disable IRQ coalescing
and pin IRQs, You get pretty decent
performance.

For example on this HP8300 I have been running a test on a 7I76EU
with a 3 KHz servo thread for about 3 days while using the PC for general
web browsing, email etc and have not had any issues.
(CPU frequency is 2.9 GHz and times are in CPU clocks)


 

 

I am getting latency with an intel adapter on just about every image release after 6.1.0-13 for some reason. so it seems something got worse after that point in time.  I can repeatably return to the above image and no more delays.  i do check whenever a new release comes out to see if that changes but so far it does not.  im not certain what the difference might be but it seems maybe it could be identified with a narrowed down image update timeline.  I tried searching

not sure if that is helpful, 6.1.0-13 is no where near as good as the 4.9 stretch version was latency wise but it at least did not throw warnings.  

I tried searching for a repository of the kernel to see if i could dig through and see what changes were made but its very difficult, it looks like kernel.org was the most informative but i still could not find an actual repository with a history tree to hunt through.  anyone that could direct me to the spot to start digging?

Chris

Try running this script to see if it helps:

 

first chmod +x pinirq.txt

then

 sudo ./pinirq.txt enp0s25

(from wherever you browser downloads stuff, probably ~/Downloads)

(this is temporary and will get reset by rebooting)


The best current PC I have for network latency is a HP 8300 USDT
(AMT needs to be turned off in the BIOS) It will run for weeks at a 3 KHz
servo thread rate while doing normal PC web/compiling/etc stuff

Might be a stab in the dark, but i would change the 5V and 24V power supplies first.

My problem just got worse. Now the error has returned even while using "sudo ethtool -C enp0s25 rx-usecs 0". Its just like before popping up every 5-10 minutes and stopping my cut in the middle of the process forcing me to recover the cuts and it is very difficult. Any ideas of what can be causing this error? and also can you guys maybe recommend working pc models so I could maybe swap the computer for one that works how it is supposed to.

Start here and continue on
forum.linuxcnc.org/38-general-linuxcnc-q...ith-mesa7i76e#124688
Edit card name accordingly.

It's not a issue with Intel MACs
If you disable IRQ coalescing
and pin IRQs, You get pretty decent
performance.

For example on this HP8300 I have been running a test on a 7I76EU
with a 3 KHz servo thread for about 3 days while using the PC for general
web browsing, email etc and have not had any issues.
(CPU frequency is 2.9 GHz and times are in CPU clocks)