I/O trace record

GTF builds an I/O record when an I/O interruption occurs and TRACE=SYSM, TRACE=SYS, TRACE=IO, or TRACE=IOP are the GTF options in effect. To trace PCI I/O interruptions, TRACE=PCI must also be in effect.

The FID for the I/O trace record is X'07'. The EID is one of the following:

X'2100' - indicates a PCI I/O interruption.
X'5101' - indicates an EOS I/O interruption.
X'5200' - indicates an I/O interruption with a valid UCB.
X'5201' - indicates a IOCS I/O interruption. It indicates an I/O interruption that also contains concurrent sense information, for devices that support the concurrent sense facility.

Offset	Size	Description
0 (0)	4	ASCB.
4 (4)	2	CPUID.
6 (6)	8	Jobname.
14 (E)	2	Device number.
16 (10)	16	I/O old PSW.
32 (20)	20	IRB words 0-4.
52 (34)	4	TCB.
56 (38)	2	Sense bytes.
58 (3A)	1	IOSB Flag (IOSFLA).
59 (3B)	1	IOSB Option (IOSOPT).
60 (3C)	1	IOS Driver ID.
61 (3D)	1	IOS level.
62 (3E)	1	UCB level.
63 (3F)	1	Flags (UCBGWT).
64 (40)	2	Base device number.
66 (42)	44	IRB words 5–15 (for EID X'5201' only).