I don't think it can be done specifically in AMP, but this command on the controller is maybe what you're looking
(Controller) #show datapath user counters
Datapath User Table Statistics
------------------------------
Current Entries(L2) 106
Current Entries(L3-v4) 137
Current Entries(L3-v6) 0
Total Current Entries(L2,L3) 243
Pending Deletes 0
High Water Mark 257
Maximum Entries 16383
Total Entries 5878
Allocation Failures 0
Max link length 2
Aggregated User Entry Statistics
--------------------------------
Current Entries 136
High Water Mark 145
Alloc Failures 0
Maximum Entries 2303
Total Entries 3836
Invalid/Denied V4 Users 202893
Invalid/Denied V6 Users 0
Force Delete(IPIP) 0
Mac Mismatch 0
User L2 add fail 0
User L3 add fail 0
User L2 del fail 0
User L3 del fail 0
Pending User del High 6