Latency testing and questions V2.93 Axis

I'm using the following hardware for my lathe:
Lenovo Yoga with i5-5200 2 core
Mesa 7i96s - with 3 encoders, 2 MPG's , 2 servo drives and all I/O

With stock BIOS settings I was getting the pop up latency warning, with revised BIOS settings the warning appears to be gone.
BIOS setting changes that seemed to make a difference:

• All power saving - disabled
• Hyper-threading - disabled
• Intel Network Frame Forwarder - disabled

Pre BIOS changes: (all times in uS)
                          Max int         Max Jitter
Servo thread:    1019             51
Base thread:     182               158

Post BIOS changes: (all times in uS)
                          Max int         Max Jitter
Servo thread:    1009             51
Base thread:         45             24.7

A few questions:

1. It's not clear to me how critical these results are when using a 7i96s for encoder and step generation?
2. Max jitter for the servo thread seems quite good, however base thread seems marginal, comments please?
3. I did not mess with isolcpus, and I'm not sure how or if I should?

 

Latency is basically unimportant with Mesa hardware _if_  you never get timeouts

Also the latency test does not test network latency which is more important for
Ethernet connected cards.

To check network latency:

sudo chrt 99 ping -i .001 -c 60000 -q 10.10.10.10
(will run for ~ 1 minute and print stats)

Assuming the Ethernet card is set for 10.10.10.10

Things that improve network latency:

isolcpus to last CPU, and pinning the Ethernet IRQ to the last CPU

disabling power management, disabling Intel AMT