[j-nsp] FPC CPU

[Nick Kritsky]

Dear j-nsp,

Apologies, if this is a trivial FAQ - but I cannot find the
information anywhere.
For M, MX, EX series there is an OID for monitoring FPC CPU.
Question - what is this CPU for? What are we measuring here?
Is it raw throughput stats of an ASIC, or CPU time that is used for
some FPC-level tasks by some utility processor (BFD? LACP? STP?
J-Flow?).
What happens when this value reaches 100% (card freeze, drops, LACP link loss)?
Appreciate your help.

Thanks
Nick