> I'm using IPCS to look at the System Trace Table from an SVD dump. > I'm puzzled by a sequence of over 100 SSIR entries prior to the > program check I'm investigating. The SSIR entries have no PSW > address or time stamp. How do I interpret the SSIR entries? Two > address spaces are involved and they may be reusable. Using IPCS, > how can I tell whether an ASID is reusable?
SSAR entries were defined in the original 370/XA architecture (see Principles of Operation). They are implicit trace entries. None of the implicit entries contain timestamps. SSIR entries were architected to be similar to SSAR entries. For an active address space, you can tell if the ASID is reusable by looking at the ASCB: SYS1.MACLIB(IHAASCB) ASCBREUS EQU X'40' - This is a reusable ASID. It may be * given out only to a reusable ASID * requestor @LEA To tell if an ASID (including ASIDs which are not currently active) is in the state where it can be used only as a reusable ASID: SYS1.MODGEN(IHAASVT) ASVTREUA DS A ADDRESS OF ASVTREUS BITS @L3A * DCL ASVTREUS BIT(*) BASED(ASVTREUA) /* ONE BIT FOR EVERY ENTRY @L3A*/ Note that these things are not designated as Programming Interfaces. But you were asking about how to tell from a dump. Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
