Newbie: 1st LinuxCNC install, crashes when I run it

I searched for some time and I got a feeling that RTAI not very supported while preempt rt is up-to-date with kernel.
So I downloaded and built linux-rt-devel version 4.9 and built LinuxCNC. Getting latency 3000 on servo thread and 12000 on base thread. Only on idle machine. When I start watching youtube videos it jumps 40000 each.
Not sure if that significant or not, but there is message on the console "Note: Using POSIX realtime".

At this point I'm not really sure what more I can do. So I'm thinking I'll live with those latencies for now an focus on actually building cnc machine. Otherwise it will never be done.

Many thanks for all your help.

hello
i have a similar issues .
everytime i try to use,it runs into crash.
here's pic
What is the problem,thank you
amd phenom ll 1090t cpu

I never got to the root of the problem. Not good at dealing with Linux oopses.
I went into BIOS settings and disabled everything APM and some APIC things. That helped with crashes.
Curious, if this helps you, what your latencies would be.

It seems a videio/energy management, ram problem .... youtube -> crash ... use latency test and Monitor to see the latency result and cpu's usage .... or you can start axis, Monitor and than youtube .... so you can see ram and cpus usage during start of program and crash of Lcnc.

I hope these help.
Giorgio