I/O Activity Section

This section contains the summary I/O information at the address space level. This differs from the I/O information in the EXCP sections of the record which present the data at a DD Name/Device level.

Triplet information

This section is located on the record using the following triplet fields, which are located in the ‘header/self-defining’ section:

Offset: SMF30UOF
Length: SMF30ULN
Number: SMF30UON - Reports the number of I/O activity sections on the current record. Because only one I/O activity section can appear on the record, this field is ‘1’ (if the section exists) or ‘0’ (if it doesn't).

Offsets		Name	Length	Format	Description
0	0	SMF30INP	4	binary	Number of card-image records in DD DATA and DD* data sets read by the reader for the map. This field is not set for subtypes 2 or 3.
4	4	SMF30TEP	4	binary	Total blocks transferred (accumulated execute channel program (EXCP) counts - valid up to X'FFFFFFFE', zero and invalid when SMF30TEF is set)
8	8	SMF30TPT	4	binary	Number of TPUTS (terminal writes) for a TSO/E session. If a batch job or a started task successfully processes TPUTs, this field might be non-zero for batch jobs or started tasks.
12	C	SMF30TGT	4	binary	Number of TGETS (terminal reads) for a TSO/E session.
16	10	SMF30RDR	1	binary	Reader device class as defined in JESPARMS. 0 — for TSO/E sessions or started tasks.
17	11	SMF30RDT	1	binary	Reader device type as defined in JESPARMS. 0 — for TSO/E sessions or started tasks.
18	12	SMF30TCN	4	binary	Total device connect time (in 128 micro-second units) for this address space. For a DIV object, this field contains total device connect time for reads, writes, and re-reads.
22	16	SMF30DCF	4	binary	Flag word Bit Meaning when set 0 Device connect time may be incorrect If this flag is set, the system resources manager (SRM) disabled the channel measurement while the job was running. If channel measurement is disabled, device connect time is not recorded. Thus, if this bit is set, SMF30TCN and SMF30DCT reflect less than the actual total connect time. 1 If this bit is on, the following fields contain incomplete data: (SRM could not deliver deltas or values for this interval) `SMF30AIC SMF30EIC SMF30AID SMF30EID SMF30AIW SMF30EIW SMF30AIS SMF30EIS` 2 Field SMF30TEP is invalid 3-31 Reserved.
26	1A	SMF30RSB	2		Reserved.
28	1C	SMF30TRR	4	binary	Total address space REREAD count.
32	20	SMF30AIC	4	binary	DASD I/O connect time, in 128-microsecond units, for address space plus dependent enclaves. Note that the value of RqsvAIC for FICON® channel utilization cannot be calculated. For more information, see the footnote.
36	24	SMF30AID	4	binary	DASD I/O disconnect time, in 128-microsecond units, for address space plus dependent enclaves.
40	28	SMF30AIW	4	binary	DASD I/O pending plus control unit queue time, in 128-microsecond units, for address space plus dependent enclaves.
44	2C	SMF30AIS	4	binary	DASD I/O start subchannel count for address space plus dependent enclaves.
48	30	SMF30EIC	4	binary	DASD I/O connect time, in 128-microsecond units, for independent enclaves owned by the address space. Note that the value of RqsvEIC for FICON channel utilization cannot be calculated. For more information, see the footnote.
52	34	SMF30EID	4	binary	DASD I/O disconnect time, in 128-microsecond units, for independent enclaves owned by the address space.
56	38	SMF30EIW	4	binary	DASD I/O pending plus control unit queue time, in 128-microsecond units, for independent enclaves owned by the address space.
60	3C	SMF30EIS	4	binary	DASD I/O start subchannel count for independent enclaves.
64	40	SMF30TEX	8	binary	Total blocks transferred - accumulated EXCP counts. This field is the 8-byte equivalent of SMF30TEP, but this field remains valid after SMF30TEP is invalid.
72	48	SMF30DAS	4	binary	Number of DDs that had their DD accounting information suppressed.

Note: The system adjusts the connect time for FICON DASD to be 1 millisecond per request. This value differs from the channel reported connect time.