"show controllers cpu-interface" gives the names of the queues.

For example Queue 0 is used for RPC, Queue1 is used for STP and so on..

Here is the relevant output of the command :

cpu-queue-frames retrieved dropped invalid hol-block

----------------- ---------- ---------- ---------- ----------

rpc 0 0 0 0

stp 0 0 0 0

ipc 0 0 0 0

routing protocol 0 0 0 0

L2 protocol 0 0 0 0

remote console 0 0 0 0

sw forwarding 0 0 0 0

host 0 0 0 0

broadcast 0 0 0 0

cbt-to-spt 0 0 0 0

igmp snooping 0 0 0 0

icmp 0 0 0 0

logging 0 0 0 0

rpf-fail 0 0 0 0

queue14 0 0 0 0

cpu heartbeat 0 0 0 0