DEVx entry for MPNCB device counter update
- Entry:
- DEVD or DEVI
- VIT option:
- CIA
- Event:
- MPNCB Active device counter update
- VIT processing module:
- ISTRACCI
- Control is returned to:
- Modules invoking the INTRACE macro that caused the record to be produced.
This trace record is written when a module is about to
update an active device counter in MPNCB. It records the current
Read and Write device counters before the change takes place.
- DEVD is generated for a counter decrement.
- DEVI is generated for a counter increment.
See z/OS® Communications Server: SNA Data Areas Volume 1 for a description of the NCB fields.
For record types with suffix I,X, or T the CIO events
are also captured within the NCB (pointed to by NCBCIOMV). The NCB
trace table is mapped by NCBCIOAR.
- Byte (hex)
- Contents
- 00–03
- Record ID:
- C"DEVD" for Device counter decrementation
- C"DEVI" for Device counter incrementation
- 04
- ID is the primary address space ID (ASID). This field is 0 if the ASID is greater than X'FF'.
- 05–07
- 0
- 08–0B
- The module name that invokes the INTRACE macro.
- 0C–0F
- The CPNCB address of the device that is about to be excluded (DEVD) or included (DEVI) from the MPNCB current active device counter.
- 10–13
- Active Read device counter (MPNARTPH)
- 14–17
- 0
- 18–1B
- Active Write device counter (MPNAWTPH)
- 1C–1F
- RPH address