Reduce read-all timing 7i76e + 7i77

Hello gentelmen,

How to reduce the read-all timig from 0,8ms to something below please? Ping I have beloe 0,3ms and latency at servothread below 800ns 

I am using 7i76e+7i77 at P1 with 3 axis setup..

I have tried everything what AI told me but without any success ... 

thanks

So you tried stuff AI has, what have you tried and what were the exact results ? To save repeating stuff.

I did the 
ping between mesa is less then 0,3ms and it is per to per connection

I did not try the custom firmware 
goal is -
resualt is no change at all ... 

If those are AI suggestions, they are pure nonsense...

To reduce network latency:

1. Make sure basic host latency setup is done (disable power management etc)

2. If you have an intel MAC on the host PC, disable IRQ coalescing.

3. Use isolcpus to run LinuxCNC on the last CPU

4.  (in conjunction with #3) Pin the Ethernet IRQ to the last CPU
(and set irqbalance to one-shot mode so it doesn't mess with the IRQ pinning)

To check maximum network latency:

sudo chrt 99 ping -i .001 -q -c 60000 10.10.10.10

( Assuming 10.10.10.10 is the 7I76E IP address ) 

This will run for 1 minute and print statistics

 

What the difference between AI and the crazy guy yelling at the sky on a street corner, the advice appears the same.