How can I see the allocated resources of an LPAR w/o checking on the HMC?

Run this command on your LPAR:

 $ lparstat -i
 Node Name                                  : barney
 Partition Name                             : mylpar2
 Partition Number                           : 2
 Type                                       : Shared-SMT
 Mode                                       : Uncapped
 Entitled Capacity                          : 0.60
 Partition Group-ID                         : 32796
 Shared Pool ID                             : 0
 Online Virtual CPUs                        : 6
 Maximum Virtual CPUs                       : 10
 Minimum Virtual CPUs                       : 1
 Online Memory                              : 3072 MB
 Maximum Memory                             : 16384 MB
 Minimum Memory                             : 1024 MB
 Variable Capacity Weight                   : 80
 Minimum Capacity                           : 0.10
 Maximum Capacity                           : 10.00
 Capacity Increment                         : 0.01
 Maximum Physical CPUs in system            : 16
 Active Physical CPUs in system             : 8
 Active CPUs in Pool                        : 8
 Unallocated Capacity                       : 0.00
 Physical CPU Percentage                    : 10.00%
 Unallocated Weight                         : 0