The RMFCRE query produces charts that show cryptographic coprocessor use by workloads executing on each active logical IPU (Individual Processor Unit) assigned to z/OS LPARs running on IBM z10 and later generation Central Processing Complexes (CPCs), such as zEC12.
The RMFCRT query creates the following CSV output file:
Crypto Coprocessor IPU Level Activity
The data extract generates the following three chart views:
Refer to the RMFCRL – CPU MF Cryptographic Coprocessor Activity LPAR Level query description for information about each of these chart views. The only difference between the charts created by the RMFCRL LPAR level query and this RMFCRE IPU level query is one of granularity. Where the RMFCRL query views generate a single chart for each LPAR, the RMFCRE IPU level query views generate a separate chart for each active logical IPU (engine) assigned to each LPAR.
The two chart samples above show charts generated by chart view #1 – Crypto Coprocessor IPU – Function Use Count for two different logical IPU’s assigned to LPAR, ‘SY22.’ LPAR ‘SY22’ is a z/OS LPAR running on an IBM 2817-711 (z196 CPC with 11 physical CP engines). LPAR ‘SY22’ is defined with eleven logical CP engines and two logical zIIP engines.
Chart view #1 displays overall cryptographic function use by type:
Advanced Encryption Standard
Data Encryption Algorithm
Pseudo-Random Number Generator
Secure Hash Algorithm
The top chart sample above shows the cryptographic coprocessor function use by the logical CP engine with IPU address 0. The average IPU busy is above 50% for most of the day, with heavy cryptographic function use.
The second chart sample above, generated for the logical CP engine with IPU address 5, however, shows that this logical engine is not heavily dispatched, and its four highest dispatch intervals (1 AM, 8 AM, 11 AM, and 4 PM) correspond to the highest busy times of the much busier logical engine shown in the top chart.
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