CSCH, HSCH, MSCH, RSCH, SSCH, SIGA and XSCH trace entries

These trace entries represent an input/output operation:

A CSCH trace entry represents a clear subchannel operation
An HSCH trace entry represents a halt subchannel operation
An MSCH trace entry represents a modify subchannel operation
An RSCH trace entry represents a resume subchannel operation
An SSCH trace entry represents a start subchannel operation
An SIGA trace entry represents a signal adapter operation
An XSCH trace entry represents a cancel subchannel operation

 PR ASID TCB-ADDR  IDENT CD/D PSW----- ADDRESS- UNIQUE-1 UNIQUE-2 UNIQUE-3  PSACLHS- PSALOCAL PASD SASD TIMESTAMP-RECORD  CP
                                                UNIQUE-4 UNIQUE-5 UNIQUE-6

 pr asid tcb-addr  CSCH  dev cc  di   iosbaddr  ucb-addr ioq-addr asc-iosb                              timestamp-------  CP

 pr asid tcb-addr  HSCH  dev cc  di   iosbaddr  ucb-addr ioq-addr asc-iosb                              timestamp-------  CP

 pr asid tcb-addr  MSCH  dev cc       iosbaddr  ucb-addr f1f2pmom mbi-t2lb                              timestamp-------  CP

 pr asid tcb-addr  RSCH  dev cc  di   iosbaddr  ucb-addr                                                timestamp-------  CP

 pr asid tcb-addr  SSCH  dev cc  di   iosbaddr  ucb-addr orb-wrd2 orb-wrd3                              timestamp-------  CP
                                                         orb-wrd4  cap-addr bdev
 
 pr asid tcb-addr  XSCH  dev cc  di   iosbaddr  ucb-addr ioq-addr bdev                                  timestamp-------  CP

 pr asid tcb-addr  SIGA  dev cc  fc   qib-addr  subsysid q-mask-1 q-mask-2                              time stamp-------  CP
                                                ucb-addr

PR

pr: Identifier of the processor that produced the TTE.

ASID

asid: Address space identifier (ASID) related to the I/O.

TCB-ADDR

tcb-addr: Address of the task control block (TCB) for the current task or the work element block WEB).

IDENT

The TTE identifier, as follows:

CSCH: Clear subchannel operation
HSCH: Halt subchannel operation
MSCH: Modify subchannel operation
RSCH: Resume subchannel operation
SSCH: Start subchannel operation
XSCH: Cancel subchannel operation
SIGA: Signal adapter operation

An asterisk before RSCH, SSCH, or SIGA indicates that the condition code associated with the I/O was not 0.

CD/D

dev: One of the following:
- The device number associated with the I/O, which will include the subchannel set identifier when appropriate.
- ADMF, if the IOSADMF macro was transferring data

PSW----- ADDRESS-

cc: Condition code in bits 2 and 3 associated with the I/O
di: Driver identifier associated with the I/O
fc: Function code associated with the I/O
iosbaddr: I/O supervisor block (IOSB) address associated with the I/O
qib-addr: Queue identification block (QIB) address associated with the I/O

UNIQUE-1/UNIQUE-2/UNIQUE-3

UNIQUE-4/UNIQUE-5/UNIQUE-6

asc-iosb: IOSB address for the associated SSCH request for the I/O
bdev: The base device number if the I/O is associated with an alias device.
cap-addr: Captured unit control block (UCB) address associated with the SSCH I/O. This field is blank if a below 16 megabyte UCB or actual above 16 megabyte UCB address was used for the start subchannel (SSCH) operation. The address of the actual above 16 megabyte UCB is in the ucb-addr field.
f1f2pmom: From the subchannel information block (SCHIB) associated with the I/O, as follows:
f1

SCHFLG1 flag field

f2

SCHFLG2 flag field

pm

SCHLPM field

om

SCHPOM field
ioq-addr: I/O queue (IOQ) address associated with the I/O
mbi-t2lb:
mbi-

SCHMBI field from the SCHIB

t2

IOSOPT2 field from the IOSB

lb

IOSFLB field from the IOSB
orb-wrd2: Word 2 of the operation request block (ORB) associated with the I/O
orb-wrd3: Word 3 of the operation request block (ORB) associated with the I/O
orb-wrd4: Word 4 of the operation request block (ORB) associated with the I/O
q-mask-1: Read or write queue mask associated with the I/O
q-mask-2: Read queue mask associated with the I/O
subsysid: Subsystem ID associated with the I/O
ucb-addr: Unit control block (UCB) address associated with the I/O

PSACLHS-

This field contains descriptive text for some SVC, SSRV, and PC trace entries. The descriptive text will not appear in SNAP/SYSUDUMP/SYSABEND output.

PSALOCAL

This field contains descriptive text for some SVC, SSRV, and PC trace entries. The descriptive text will not appear in SNAP/SYSUDUMP/SYSABEND output.

PASD

This field contains descriptive text for some SVC, SSRV, and PC trace entries. The descriptive text will not appear in SNAP/SYSUDUMP/SYSABEND output.

SASD

This field contains descriptive text for some SVC, SSRV, and PC trace entries. The descriptive text will not appear in SNAP/SYSUDUMP/SYSABEND output.

TIMESTAMP-RECORD

timestamp-------: Time-of-day (TOD) clock value when system trace created the trace entry. The value is in the same format as the time stamp on the logrec data set records.

CP

The CP column contains 2 hex digits of the processor model-dependent information, which is intended to identify the physical CP that made the trace entry. CP is only provided when formatting SYSTRACE under IPCS. CP is not provided for SYSUDUMP, SYSABEND, or SNAP.