cpu-id

    Numeric value indicating the identity of the CPU for which
    context information is to be displayed. If you specify the cpu-
    id parameter, the SHOW CPU command performs an implicit SET CPU
    command, making the CPU indicated by cpu-id the current CPU for
    subsequent SDA commands.

    If you do not specify a cpu-id, the state of the SDA current CPU
    is displayed.

    If you specify the cpu-id of a CPU that was not active at the
    time of the system failure, SDA displays the following message:

    %SDA-E-CPUNOTVLD, CPU not booted or CPU number out of range

    Type HELP SET CPU command and HELP CPU_CONTEXT for information
    on how this can affect the CPU context (and process context) in
    which SDA commands execute.