Contents of SVC dumps

Unlike ABEND dumps, SVC dumps do not have a parmlib member that establishes the dump options list at system initialization. The IBM-supplied IEACMD00 parmlib member contains a CHNGDUMP operator command that adds the local system queue area (LSQA) and trace data (TRT) to every SVC dump requested by an SDUMP or SDUMPX macro or a DUMP operator command, but not for SVC dumps requested by SLIP operator commands.

The contents of areas in an SVC dump depend on the dump type:

Scheduled SVC dump: The current task control block (TCB) and request block (RB) in the dump are for the dump task, rather than for the failing task. For additional address spaces in the dump, the TCB and RB are for the dump task.
Synchronous SVC dump: The current TCB and RB in the dump are for the failing task.

See z/OS MVS IPCS Commands for examples of IPCS output formatted from SVC dumps.