I/O response and service time components are recorded in multiples of 128 micro-seconds.
Offsets | Name | Length | Format | Description | |
---|---|---|---|---|---|
0 | 0 | S42VDIOR | 4 | binary | Response time. |
4 | 4 | S42VDIOC | 4 | binary | Average I/O connect time. |
8 | 8 | S42VDIOP | 4 | binary | Average I/O pending time. |
12 | C | S42VDIOD | 4 | binary | Average I/O disconnect time |
16 | 10 | S42VDIOQ | 4 | binary | Average control unit queue time. |
20 | 14 | S42VDION | 4 | binary | Total number of I/Os. |
3990 Control Unit Cache Statistics: | |||||
24 | 18 | S42VDCND | 4 | binary | Number of cache candidates. |
28 | 1C | S42VDHIT | 4 | binary | Number of cache hits. |
32 | 20 | S42VDWCN | 4 | binary | Number of write candidates. |
36 | 24 | S42VDWHI | 4 | binary | Number of write hits. |
40 | 28 | S42VDSEQ | 4 | binary | Number of sequential I/O operations. |
44 | 2C | S42VDRLC | 4 | binary | Number of record level cache I/O operations. |
48 | 30 | S42VDICL | 4 | binary | Number of inhibit cache load I/O operations. |
52 | 34 | S42VDDA0 | 4 | binary | Average I/O device-active-only time. |
56 | 38 | S42VDRDD | 4 | binary | Average disconnect time for reads. |
60 | 3C | S42VDRDT | 4 | binary | Total number of read operations. |
64 | 40 | S42VDHRD | 4 | binary | Number of zHPF read operations. |
68 | 44 | S42VDHWR | 4 | binary | Number of zHPF write operations |
72 | 48 | S42VDR1U | 4 | binary | Response time (one microsecond). |
76 | 4C | S42VDC1U | 4 | binary | Average I/O connect time (one microsecond). |
80 | 50 | S42VDP1U | 4 | binary | Average I/O pending time (one microsecond). |
84 | 54 | S42VDD1U | 4 | binary | Average I/O disconnect time (one microsecond). |
88 | 58 | S42VDQ1U | 4 | binary | Average control unit queue time (one microsecond). |
92 | 5C | S42VDA1U | 4 | binary | Average I/O device-active-only time (one microsecond). |
96 | 60 | S42VDT1U | 4 | binary | Average disconnect time for reads (one microsecond). |
100 | 64 | S42VDB1U | 4 | binary | Average device busy time (one microsecond). |
104 | 68 | S42VDM1U | 4 | binary | Average initial command response time (one microsecond). |
108 | 6C | * | 4 | – | Reserved. |