I/O Queuing Data Section

This section contains one per logical control unit, described by triplet SMF79ASS.

Offsets Name Length Format Description
0 0 R79EID2 2 EBCDIC Logical control unit identifier.
2 2 R79EDST 1 binary Data status
Bit
Meaning when set
0
Reserved
1
No hardware measurements available
2-3
Reserved.
4
LCU contains DCM managed channels.
5
Path attributes are valid.
6-7
Reserved.
3 3   1   Reserved.
4 4 R79EQSM 4 binary Accumulated length of CU-HDR queue.
8 8 R79EQCT 4 binary Number of entries placed on the CU-HDR queue.
12 C R79EMCMN 2 binary Minimum number of DCM managed channels used.
14 E R79EMCMX 2 binary Maximum number of DCM managed channels used.
16 10 R79EMCDF 2 binary Defined number of DCM managed channels.
18 12   2   Reserved.
20 14 R79EPTM 4 binary Accumulated path taken count for DCM managed channels.
24 18 R79EDPBM 4 binary Accumulated director port busy count for DCM managed channels.
28 1C R79ECUBM 4 binary Accumulated control unit busy count for DCM managed channels.
32 20 R79ECBTM 4 binary Accumulated control unit busy delay time for DCM managed channels.
36 24 R79ECMRM 4 binary Accumulated initial command response time for DCM managed channels.
40 28 R79ESBSM 4 binary Accumulated switch busy count summation for DCM managed channels.
44 2C   8   Reserved.
52 34 R79ECSST 4 binary Channel subsystem wait time.
Parent topic: Subtype 14 — I/O Queuing Activity