CA MICS Hardware and SCP Analyzer (RMF) Queries › Hardware Instrumentation Services CPU Measurement Facility › RMFCRT - CPU MF Cryptographic Coprocessor Activity CPUTYPE Level › Overview

Overview

The RMFCRT query produces charts that show cryptographic coprocessor use by workloads executing on different types of IPUs (Individual Processor Units) assigned to z/OS LPARs running on IBM z10 and later generation Central Processing Complexes (CPCs), such as zEC12. z/OS LPARs can be assigned three different IPU types:

CP

Central Processors – General processing unit

zAAP

System z Application Assist Processor – specialty engine for JAVA workloads

zIIP

System z Integrated Information Processor – specialty engine for enclave exploiting workloads

In addition to cryptographic function use, these charts quantify delays incurred because the coprocessors were busy, and the average number of machine cycles wasted due to these delays. The RMFCRT query creates the following CSV output file:

Crypto Coprocessor CPUTYPE Level Activity

The data extract generates the following three chart views:

1. Crypto Coprocessor CPUTYPE – Function Use Count
2. Crypto Coprocessor CPUTYPE – Blocked Function Pct
3. Crypto Coprocessor CPUTYPE – Avg Penalty Cycles per Blocked Function

For information about each of these chart views see the RMFCRL – CPU MF Cryptographic Coprocessor Activity LPAR Level query description. The difference between the charts created by the RMFCRL LPAR level query and the RMFCRT CPUTYPE level query is in the chart granularity. The RMFCRL query views generate a separate chart for each LPAR,but the RMFCRT CPUTYPE level query views generate a separate chart for each IPU type (as for example, CP, zAAP, or zIIP) assigned to each LPAR.

The two chart samples above previous two chart samples show charts generated by chart view #1 – Crypto Coprocessor CPUTYPE – Function Use Count for a single LPAR, ‘SY22.’ LPAR ‘SY22’ is a z/OS LPAR running on an IBM 2817-711 (z196 CPC with 11 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:

AES

Advanced Encryption Standard

DEA

Data Encryption Algorithm

PRNG

Pseudo-Random Number Generator

SHA

Secure Hash Algorithm

The first chart sample shows that workloads running on the 11 logical CP processors execute SHA cryptographic functions (green bars) throughout the day. DEA function (red bars) execution is highest in the early morning and late evening hours, and AES function execution is highest between 8 AM and 8 PM. The second chart sample generated for the 2 logical zIIP processors, shows much lower cryptographic function execution except for a large spike at about 8 AM.