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linuxcnc.org/docs/html/install/latency-test.html

ok and the stripes on the sides are indicator for bad latency and the middle doesnt interrest?!

When not using --show , the stripes on both sides of the graph will show that there are latency excursions beyond the visible area, meaning the latency is so big it can not be shown on the graph.
Using --show will add two more fields where the number of excursions is shown.
In short:
-stripes on both sides = bad latency that can not be shown in the graph
-no stripes = latency is only as shown in the graph.

aaaah ok... i dont undeestand because i see in the middle the big Mountain.. but left and right only 2 small stripes...

i trust what you say but dont understand in all.