Managing Operations › Exploitation of the zIIP Processor › How to Monitor zIIP Usage for a Job

How to Monitor zIIP Usage for a Job

SMF Record 30 (x1E) - Common Address Space Work provides details on zIIP usage at a specific job level.

For work that is run on a normal processor, CPU time is accumulated in SMF 30 record field SMF30CPT for task related work or SMF30CPS for SRB work. CA Tape Encryption normally runs in SRB mode; therefore CPU time is mainly held in SMF30CPS.

The SMF 30 record provides for accumulating CPU time for both independent and dependent enclaves in the SMF 30 record of the owning address space. SMF30ENC or SMF30DEP holds CPU time used by the independent or dependent enclaves but only when in the WLM enclave. Time accumulated in SMF30ENC and SMF30DEP is also part of the value in SMF30CPT. CA Tape Encryption uses dependent enclaves.

The SMF30ENC, SMF30DEP, or SMF30CPT fields do not include time spent processing SRBs joined to an enclave that is eligible to run on a zIIP. Instead, time spent on a zIIP is held in fields

• SMF30_ENCLAVE_TIME_ON_zIIP (independent enclaves) or
• SMF30_DEPENC_TIME_ ON_zIIP(dependent enclaves) and
• SMF30_TIME_ON_zIIP (both independent and dependent enclaves).