








	*SMF Tools*

SMF Type 78 Record

This table shows the record layout for type 78 SMF records
(RMF Virtual Storage and I/O Queuing Activity - z/OS 1.13).

List of other SMF record layouts available.
List of sample SMF reports.

Purpose: RMF writes record type 78 during a Monitor I session. It has these subtypes:

Subtype 2 reports virtual storage activity. It contains a common storage data section and may contain one or more private area data sections. The minimum length of subtype 2 is 1836 bytes if no private area is included. Otherwise the length is 112 bytes plus 1724 bytes plus at least 392 bytes for each private area that is monitored.
Subtype 3 reports I/O queuing activity and HyperPAV activity. It contains an entry for each logical control unit that had any activity during the interval. Note: Your installation may produce several type 78 subtype 3 records.

This subtype contains the following sections:

Control section
IOP Initiative Queue and Utilization data section
I/O Queuing Configuration control section
I/O Queuing Configuration data section
I/O Queuing data section
HyperPAV Data Section

Each subtype contains a header section followed by the RMF product section.

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SMF Type 78 Record -- RMF Virtual Storage and I/O Queuing Activity - z/OS 1.13
Offset (Dec.)	Offset (Hex)	Name	Length	Format	Description
0	0	SMF78LEN	2	binary	Record length. This field and the next field (total of four bytes) form the RDW (record descriptor word). See “Standard SMF Record Header” on page 13-1 for a detailed description.
2	2	SMF78SEG	2	binary	Segment descriptor (see record length field).
4	4	SMF78FLG	1	binary	System indicator Bit Meaning When Set 0 New record format 1 Subtypes used 2 Reserved. 3-6 Version indicators* 7 System is running in PR/SM mode.*See “Standard SMF Record Header” on page 13-1 for a detailed description.
5	5	SMF78RTY	1	binary	Record type 78 (X'4E').
6	6	SMF78TME	4	binary	Time since midnight, in hundredths of a second, when the record was moved into the SMF buffer.
10	A	SMF78DTE	4	packed	Date when the record was moved into the SMF buffer, in the form 0cyydddF. See “Standard SMF Record Header” on page 13-1 for a detailed description.
14	E	SMF78SID	4	EBCDIC	System identification (from the SMFPRMxx SID parameter).
18	12	SMF78SSI	4	EBCDIC	Subsystem identification (‘RMF’).
22	16	SMF78STY	2	binary	Subtype.
24	18	SMF78TRN	2	binary	Number of triplets in record. A triplet is a set of three SMF fields (offset/length/number values) that defines a section of the record.
26	1A	--	2	binary	Reserved.
28	1C	SMF78PRS	4	binary	Offset to RMF product section from start of record, including record descriptor word (RDW).
32	20	SMF78PRL	2	binary	Length of RMF product section.
34	22	SMF78PRN	2	binary	Number of RMF product sections.
36	24	SMF78DCS	4	binary	Offset to virtual storage common storage data section.
40	28	SMF78DCL	2	binary	Length of virtual storage common storage data section.
42	2A	SMF78DCN	2	binary	Number of virtual storage common storage data sections.
44	2C	SMF78ASS	4	binary	Offset to virtual storage private area data section.
48	30	SMF78ASL	2	binary	Length of virtual storage private area data section.
50	32	SMF78ASN	2	binary	Number of virtual storage private area data sections.
Individual header extension for subtype 2:
52	34	SMF78SPS	4	binary	Offset to private area subpool section.
56	38	SMF78SPL	2	binary	Length of private area subpool section.
58	3A	SMF78SPN	2	binary	Number of private area subpool sections.
Individual header extension for subtype 3:
52	34	SMF78QDS	4	binary	Offset to I/O queue (IOQ) global section.
56	38	SMF78QDL	2	binary	Length of IOQ global section.
58	3A	SMF78QDN	2	binary	Number of IOQ global sections.
60	3C	SMF78HPS	4	binary	Offset to HyperPAV Data sections.
64	40	SMF78HPL	2	binary	Length of HyperPAV Data section.
66	42	SMF78HPN	2	binary	Number of HyperPAV Data sections.
RMF Product Section(Offset from beginning of record: SMF78PRS)
0	0	SMF78MFV	2	packed	RMF version number.
2	2	SMF78PRD	8	EBCDIC	Product name (‘RMF’).
10	A	SMF78IST	4	packed	Time that the RMF measurement interval started, in the form 0hhmmssF, where hh is the hours, mm is the minutes, ss is the seconds, and F is the sign.
14	E	SMF78DAT	4	packed	Date when the RMF measurement interval started, in the form 0cyydddF. See “Standard SMF Record Header” on page 13-1 for a detailed description.
18	12	SMF78INT	4	packed	Duration of the RMF measurement interval, in the form mmsstttF where mm is the minutes, ss is the seconds, ttt is the milliseconds, and F is the sign. (The end of the measurement interval is the sum of the recorded start time and this field.)
22	16	--	2	binary	Reserved.
24	18	SMF78SAM	4	binary	Number of RMF samples.
28	1C	--	2	binary	Reserved.
30	1E	SMF78FLA	2	binary	Flags Bit Meaning When Set 0 Reserved 1 Samples have been skipped 2 Record was written by RMF Monitor III 3 Interval was synchronized with SMF 4-15 Reserved.
32	20	--	4	binary	Reserved.
36	24	SMF78CYC	4	packed	Sampling cycle length, in the form 000ttttF, where tttt is the milliseconds and F is the sign (taken from CYCLE option). The range of values is 0.050 to 9.999 seconds.
40	28	SMF78MVS	8	EBCDIC	MVS software level (consists of an acronym and the version, release, and modification level - ZVvvrrmm).
48	30	SMF78IML	1	binary	Indicates the type of processor complex on which data measurements were taken. Value Meaning 3 9672, zSeries 49 31 SMF75PRF 1 binary Processor flags. Bit Meaning When Set 0 The system has expanded storage 1 The processor is enabled for ES connection architecture (ESCA) 2 There is an ES connection director in the configuration 3 System is running in z/Architecture mode 4 At least one zAAP is currently installed 5 At least one zIIP is currently installed 6 Enhanced DAT architecture available 7 Reserved.
50	32	SMF78PTN	1	binary	PR/SM partition number of the partition that wrote this record.
51	33	SMF78SRL	1	binary	SMF record level change number (X’5D’ for z/OS V1R13 RMF). This field enables processing of SMF record level changes in an existing release.
52	34	SMF78IET	8	char	Interval expiration time token. This token can be used to identify other than RMF records that belong to the same interval (if interval was synchronized with SMF).
60	3C	SMF78LGO	8	binary	Offset GMT to local time (STCK format).
68	44	SMF78RAO	4	binary	Offset to reassembly area relative to start of RMF product section.
72	48	SMF78RAL	2	binary	Length of reassembly area. Area consists of a fixed header and a variable number of information blocks. Length depends on the record type/subtype, but is fixed for a specific type/subtype.
74	4A	SMF78RAN	2	binary	Reassembly area indicator. Value Meaning 0 Record is not broken. 1 Record is broken.Note: This field is used to indicate whether an SMF record is a broken record. Therefore, offset (SMF78RAO) and length (SMF78RAL) are only valid if SMF78RAN = 1. A reassembly area is only present in broken records.
76	4C	SMF78OIL	2	binary	Original interval length as defined in the session or by SMF (in seconds).
78	4E	SMF78SYN	2	binary	SYNC value in seconds.
80	50	SMF78GIE	8	binary	Projected gathering interval end (STCK format) GMT time.
88	58	SMF78XNM	8	EBCDIC	Sysplex name as defined in parmlib member COUPLExx.
96	60	SMF78SNM	8	EBCDIC	System name for current system as defined in parmlib member IEASYSxx SYSNAME parameter.
Reassembly Area(Offset from beginning of record: SMF78PRS + SMF78RAO)
0	0	SMF78RBR	2	binary	Total number of broken records built from the original large record.
2	2	SMF78RSQ	2	binary	Sequence number of this broken record. Every broken record built from the same large record must have a unique sequence number, it is in the range from 1 to SMF78RBR.
4	4	SMF78RIO	4	binary	Offset to first reassembly information block relative to start of reassembly area header.
8	8	SMF78RIL	2	binary	Length of reassembly information block.
10	A	SMF78RIN	2	binary	Number of reassembly information blocks (same value as SMF78TRN in header section).
12	C	--	4	binary	Reserved.
Reassembly Area Information Block(Offset from beginning of record: SMF78PRS + SMF78RAO + SMF78RIO)
0	0	SMF78RNN	2	binary	Total number of sections in the original large record. This field contains information of how many sections of a specific type were contained in the original SMF record. This field is a copy of the number field of the triplet in the original (non broken) record.
2	2	SMF78RPP	2	binary	Position of the first of one or more consecutive sections described by this block as in the original record. Values in the range of 1 to SMF78RNN are valid for correct processing. A value of 0 will skip processing of this information block. This field provides information where the sections that are part of this broken record were placed in the original record before the split took place. The actual number of consecutive sections contained in this record is available from the actual triplet in the header extension.
Virtual Storage Common Storage Data Section (Present for subtype 2) This section describes triplet SMF78DCS. Layout 1 in descriptions below: For fields of format Layout 1 containing data from below 16 megabytes, use only the first 20 bytes. For fields of this format containing data from both below and above 16 megabytes, use all 40 bytes. +0 VSDBMIN 4 binary Minimum value for below 16 megabytes. +4 VSDBNTME 4 binary Time stamp for minimum. Format is high-order bytes of time-of-day (TOD) clock. +8 VSDBMAX 4 binary Maximum value for below 16 megabytes. +12 VSDBXTME 4 binary Time stamp for maximum. Format is high-order bytes of time-of-day (TOD) clock. +16 VSDBTOTL 4 floating Total for all samples below 16 megabytes (used to calculate average). See SMF78SAM to calculate averages for common storage data section fields, and R782SAMP to calculate averages for private area data and private subpool section fields. +20 VSDAMIN 4 binary Minimum value for above 16 megabytes. +24 VSDANTME 4 binary Time stamp for minimum. Format is high-order bytes of time-of-day (TOD) clock. +28 VSDAMAX 4 binary Maximum value for above 16 megabytes. +32 VSDAXTME 4 binary Time stamp for maximum. Format is high-order bytes of time-of-day (TOD) clock. +36 VSDATOTL 4 floating Total for all samples above 16 megabytes (used to calculate average). Layout 2 in descriptions below: +0 VSDGMIN 8 floating Minimum number of bytes allocated above 2GB. +8 VSDGNTME 4 binary Time stamp for minimum value. +12 -- 4 Reserved. +16 VSDGMAX 8 floating Maximum number of bytes allocated above 2GB. +24 VSDGXTME 4 binary Time stamp for maximum value. +28 -- 4 Reserved. +32 VSDGTOTL 8 floating Total for all samples above 2GB (used to calculate the average). +40 VSDGHWM 8 floating Peak number of bytes allocated in storage above 2GB. Layout 3 in descriptions below: +0 VSDCMIN 8 floating Minimum number of 64-bit memory objects / frames + 8 VSDCNTME 4 binary Time stamp for minimum value. +12 -- 4 Reserved. +16 VSDCMAX 8 floating Maximum number of 64-bit memory objects / frames +24 VSDCXTME 4 binary Time stamp for maximum value. +28 -- 4 Reserved. +32 VSDCTOTL 8 floating Total for all samples (used to calculate the average). (Offset from beginning of record: SMF78DCS)
0	0	SMF782PA	4	binary	Private area address below 16 megabytes.
4	4	SMF782PS	4	binary	Private area size (in bytes) below 16 megabytes.
8	8	SMF782EPA	4	binary	Private area address above 16 megabytes.
12	C	SMF782EPS	4	binary	Private area size (in bytes) above 16 megabytes.
16	10	SMF782CA	4	binary	CSA address below 16 megabytes.
20	14	SMF782CS	4	binary	CSA size (in bytes) below 16 megabytes.
24	18	SMF782ECA	4	binary	CSA address above 16 megabytes.
28	1C	SMF782ECS	4	binary	CSA size (in bytes) above 16 megabytes.
32	20	--	8	binary	Reserved.
40	28	SMF782MLA	4	binary	Modified link pack area (MLPA) address below 16 megabytes.
44	2C	SMF782MLS	4	binary	Modified link pack area (MLPA) size (in bytes) below 16 megabytes.
48	30	SMF782EMLA	4	binary	Modified link pack area (MLPA) address above 16 megabytes.
52	34	SMF782EMLS	4	binary	Modified link pack area (MLPA) size (in bytes) above 16 megabytes.
56	38	SMF782FLA	4	binary	Fixed link pack area (FLPA) address below 16 megabytes.
60	3C	SMF782FLS	4	binary	Fixed link pack area (FLPA) size (in bytes) below 16 megabytes.
64	40	SMF782EFLA	4	binary	Fixed link pack area (FLPA) address above 16 megabytes.
68	44	SMF782EFLS	4	binary	Fixed link pack area (FLPA) size (in bytes) above 16 megabytes.
72	48	SMF782PLA	4	binary	Pageable link pack area (PLPA) address below 16 megabytes.
76	4C	SMF782PLS	4	binary	Pageable link pack area (PLPA) size (in bytes) below 16 megabytes.
80	50	SMF782ELPA	4	binary	Pageable link pack area (PLPA) address above 16 megabytes.
84	54	SMF782ELPS	4	binary	Pageable link pack area (PLPA) size (in bytes) above 16 megabytes.
88	58	SMF782SA	4	binary	System queue area (SQA) address below 16 megabytes.
92	5C	SMF782SS	4	binary	System queue area (SQA) size (in bytes) below 16 megabytes.
96	60	SMF782ESA	4	binary	System queue area (SQA) address above 16 megabytes.
100	64	SMF782ESS	4	binary	System queue area (SQA) size (in bytes) above 16 megabytes.
104	68	SMF782NA	4	binary	Nucleus address below 16 megabytes.
108	6C	SMF782NS	4	binary	Nucleus size (in bytes) below 16 megabytes.
112	70	SMF782ENA	4	binary	Nucleus address above 16 megabytes.
116	74	SMF782ENS	4	binary	Nucleus size (in bytes) above 16 megabytes.
120	78	SMF782NL	4	binary	Pageable link pack area (PLPA) space redundant with MLPA/FLPA below 16 megabytes.
124	7C	SMF782ENL	4	binary	Pageable link pack area (PLPA) space redundant with MLPA/FLPA above 16 megabytes.
128	80	SMF782LPAI	4	binary	Intermodule space in Pageable link pack area (PLPA) below 16 megabytes.
132	84	SMF782ELPI	4	binary	Intermodule space in Pageable link pack area (PLPA) above 16 megabytes.
136	88	SMF782MR	4	binary	Maximum possible user region below 16 megabytes.
140	8C	SMF782EMR	4	binary	Maximum possible user region above 16 megabytes.
144	90	SMF782SQAU	40	Structure	(Layout 1) System queue area (SQA) usage both above and below 16 megabytes. The description of the format of all fields being marked as ’Structure (Layout 1)’ can be found at the beginning of the VIRTUAL STORAGE COMMON STORAGE DATA SECTION.
184	B8	SMF782CSAU	40	Structure	(Layout 1) CSA usage both above and below 16 megabytes.
224	E0	SMF782CSAK	360	Structure	(Layout 1) CSA used both above and below 16 megabytes by subpool key. 40 bytes for each of 9 keys.
584	248	SMF782CSAF	40	Structure	(Layout 1) Free CSA both above and below 16 megabytes.
624	270	SMF782CSLF	40	Structure	(Layout 1) Largest free block of CSA both above and below 16 megabytes.
664	298	SMF782CSAL	40	Structure	(Layout 1) CSA allocated area size (in bytes) both above and below 16 megabytes.
704	2C0	SMF782SQAF	40	Structure	(Layout 1) Free system queue area (SQA) both above and below 16 megabytes.
744	2E8	SMF782SQLF	40	Structure	(Layout 1) Largest free block of system queue area (SQA) both above and below 16 megabytes.
784	310	SMF782SQAL	40	Structure	(Layout 1) System queue area (SQA) allocated area size (in bytes) both above and below 16 megabytes.
824	338	SMF782SQEX	40	Structure	(Layout 1) System queue area (SQA) expansion into CSA both above and below 16 megabytes.
864	360	SMF782227K	200	Structure	(Layout 1) CSA subpool 227 (below 16 megabytes) by key. The key data appears in the following order: 0, 1, 2, 3, 4, 5, 6, 7, 8-F, ALL. 20 bytes for each of 10 keys.
1064	428	SMF782228K	200	Structure	(Layout 1) CSA subpool 228 (below 16 megabytes) by key. The key data appears in the following order: 0, 1, 2, 3, 4, 5, 6, 7, 8-F, ALL. 20 bytes for each of 10 keys
1264	4F0	SMF782231K	200	Structure	(Layout 1) CSA subpool 231 (below 16 megabytes) by key. The key data appears in the following order: 0, 1, 2, 3, 4, 5, 6, 7, 8-F, ALL. 20 bytes for each of 10 keys.
1464	5B8	SMF782241K	200	Structure	(Layout 1) CSA subpool 241 (below 16 megabytes) by key. The key data appears in the following order: 0, 1, 2, 3, 4, 5, 6, 7, 8-F, ALL. 20 bytes for each of 10 keys.
1664	680	SMF782226	20	Structure	(Layout 1) System queue area (SQA) subpool 226 (below 16 megabytes).
1684	694	SMF782239	20	Structure	(Layout 1) System queue area (SQA) subpool 239 (below 16 megabytes).
1704	6A8	SMF782245	20	Structure	(Layout 1) System queue area (SQA) subpool 245 (below 16 megabytes).
Virtual Storage Private Area Data Section (Present for subtype 2) This section contains triplet SMF78ASS.(Offset from beginning of record: SMF78ASS)
0	0	SMF782JOBN	8	EBCDIC	Name of job being monitored.
8	8	SMF782RDTM	4	binary	Reader start time.
12	C	SMF782RDDT	4	packed	Reader start date.
16	10	SMF782SUBI	2	binary	Index of first subpool entry in the private area subpool section for this job. This field provides the first array element for this job’s private area subpool sections.
18	12	SMF782SUBN	2	binary	Index of last subpool entry for this job. This field provides the last array element for this job’s private area subpools.
20	14	SMF782STEP	8	EBCDIC	Name of step active when monitoring began.
28	1C	SMF782PGMN	8	EBCDIC	Program name (taken from PGM= parameter on EXEC card) of job being monitored.
36	24	SMF782FLGS	2	binary	Flags Bit Meaning When Set 0 Job active at start of interval 1 Job terminated during interval 2 GETMAIN limit changed during interval 3 Data incorrect because RMF terminated abnormally while sampling 4-15 Reserved.
38	26	--	2	binary	Reserved.
40	28	SMF782SAMP	4	binary	Number of samples. This field is used to calculate the averages in the private area data and private area subpool sections.
44	2C	SMF782REGR	4	binary	Region requested by JCL (in bytes).
48	30	SMF782RGAB	4	binary	Region below 16 megabytes assigned by exits (in bytes).
52	34	SMF782RGAA	4	binary	Region above 16 megabytes assigned by exits (in bytes).
56	38	SMF782GMLB	4	binary	GETMAIN limit below 16 megabytes (in bytes).
60	3C	SMF782GMLA	4	binary	GETMAIN limit above 16 megabytes (in bytes).
64	40	SMF782URAB	4	binary	User region address below 16 megabytes.
68	44	SMF782URAA	4	binary	User region address above 16 megabytes.
72	48	SMF782LSFP	40	Structure	(Layout 1)1 LSQA/SWA/229/230/249 free pages both above and below 16 megabytes
112	70	SMF782LSFB	40	Structure	(Layout 1) LSQA/SWA/229/230/249 largest free block both above and below 16 megabytes.
152	98	SMF782LSAL	40	Structure	(Layout 1) LSQA/SWA/229/230/249 allocated area size (in bytes) both above and below 16 megabytes.
192	C0	SMF782LSPA	40	Structure	(Layout 1) LSQA/SWA/229/230/249 allocated pages both above and below 16 megabytes.
232	E8	SMF782USFP	40	Structure	(Layout 1) User region free pages both above and below 16 megabytes.
272	110	SMF782USFB	40	Structure	(Layout 1) User region largest free block both above and below 16 megabytes.
312	138	SMF782USAL	40	Structure	(Layout 1) User region allocated area size (in bytes) above 16 megabytes.
352	160	SMF782USPA	40	Structure	(Layout 1) User region pages allocated both below and above 16 megabytes.
392	188	SMF782TOBY	48	Structure	(Layout 2)2 Number of bytes allocated in storage above the 2-GB-line.
440	1B8	SMF782SHBY	48	Structure	(Layout 2) Number of shared bytes allocated in storage above the 2-GB-line.
488	1E8	SMF782COBY	48	Structure	(Layout 2) Number of 64-bit common bytes allocated in storage above the 2-GB-line.
536	218	SMF782TOMO	40	Structure	(Layout 3)3 Total number of 64-bit private memory objects allocated.
576	240	SMF782SHMO	40	Structure	(Layout 3) Number of shared memory objects.
616	268	SMF782COMO	40	Structure	(Layout 3) Number of 64-bit common memory objects.
656	290	SMF782LGMO	40	Structure	(Layout 3) Number of large memory objects.
696	2B8	SMF782TOFR	40	Structure	(Layout 3) Number of 1 MB frames.
736	2E0	SMF782MEML	8	binary	Address space memory limit in MB.
Virtual Storage Private Area Subpool Section (Present for subtype 2) This section contains triplet SMF78SPS.(Offset from beginning of record: SMF78SPS)
0	0	SMF782SPN	2	binary	Subpool number. Each private area data section occurs one after the other. All private area subpool sections follow all private area data sections. To relate a subpool to a job, see the SMF782SUBN fields in the private area data section.
2	2	--	2	binary	Reserved.
4	4	SMF782SPD	20	Structure	Subpool data.
Control Section (Present for subtype 3) This section contains triplet SMF78QDS.(Offset from beginning of record: SMF78QDS)
0	0	SMF783GFLG	1	binary	IOQ global flags Bit Meaning When Set 0 Incorrect data because channel measurement facility failed 1 DIAGNOSE interface failed 2 Store Primary Queue Data not supported 3 DCM supported by hardware 4 Configuration contains DCM managed channels 5 IOP utilization data supported 6 Initial command response time measurements supported 7 Reserved.
1	1	--	1	binary	Reserved.
2	2	SMF783GNTR	2	binary	Number of descriptor triplets following.
4	4	SMF783GIDS	4	binary	Offset to I/O processor (IOP) initiative queue data section.
8	8	SMF783GIDL	2	binary	Length of input output processor (IOP) initiative queue data section.
10	A	SMF783GIDN	2	binary	Number of input output processor (IOP) initiative queue data sections.
12	C	--	4	binary	Reserved.
16	10	SMF783TSR	2	binary	Total number of small records written during interval.
18	12	--	2	binary	Reserved.
20	14	SMF783TOT	4	binary	Total number of data sections recorded during the interval.
24	18	SMF783NXT	4	binary	Total number of data sections in the following record.
28	1C	SMF783CFL	1	binary	Configuration change flags Bit Meaning When Set 0 Configuration changed. Used to decide whether to provide the text “POR” or “ACTIVATE” on reports. Also used to check whether data can be combined in a duration report. 1 Configuration change since power on reset (POR). 2 POR using IOC data set that contains a token. 3 I/O token is valid. 4 Hardware allows multiple channel subsystems. 5-7 Reserved.
29	1D	SMF783CSS	1	binary	Channel Subsystem ID. Only valid if bit 4 of SMF783CFL is set.
30	1E	--	2	binary	Reserved.
32	20	SMF783TNM	44	EBCDIC	IODF name.
76	4C	SMF783TSF	2	EBCDIC	IODF name suffix.
78	4E	--	2	binary	Reserved.
80	50	SMF783TOK	16	EBCDIC	Partial token information.
80	50	SMF783TDT	8	EBCDIC	IODF creation date, in the form mm/dd/yy.
88	58	SMF783TTM	8	EBCDIC	IODF creation time, in the form hh.mm.ss.
96	60	SMF783TDY	10	EBCDIC	IODF creation date, in the form mm/dd/yyyy.
106	6A	--	2	binary	Reserved.
IOP Initiative Queue and Utilization Data Section (Present for subtype 3) This section contains one entry per IP described by triplet SMF783GIDS. The contents of the fields SMF783IIPB through SMF783IDVB are valid if bit 5 of SMF783GFLG is set. (Offset from beginning of record: SMF783GIDS)
0	0	SMF783IQID	2	binary	Input output processor (IOP) initiative queue identifier.
2	2	SMF783IFLG	1	binary	Input output processor (IOP) Flags Bit Meaning When Set 0 Input output processor (IOP) is installed. 1-7 Reserved.
3	3	SMF783DSTX	1	binary	Data status extension. Bit Meaning When Set 0 LCU contains at least one FICON channel. 1 Connect time of at least one device is invalid. 2 Disconnect time of at least one device is invalid. 3-7 Reserved.
4	4	SMF783IQSM	4	binary	Accumulator is incremented by the current queue length in the Input output processor (IOP) whenever a request is enqueued.
8	8	SMF783IQCT	4	binary	Number of elements enqueued on the Input output processor (IOP) initiative queue.
12	C	--	4	binary	Reserved.
16	10	SMF783IIPB	8	binary	Number of times the I/O processor was busy.
24	18	SMF783IIPI	8	binary	Number of times the I/O processor was idle.
32	20	SMF783IIFS	8	binary	Number of I/O functions initially started.
40	28	SMF783IPII	8	binary	Number of processed I/O interrupts.
48	30	SMF783ICPB	8	binary	Number of times an I/O was retried due to channel path busy.
56	38	SMF783IDPB	8	binary	Number of times an I/O was retried.
64	40	SMF783ICUB	8	binary	Number of times an I/O was retried due to control unit busy.
72	48	SMF783IDVB	8	binary	Number of times an I/O was retried due to device busy.
I/O Queuing Configuration Control Section (Present for subtype 3) This section contains one entry per LCU, described by triplet SMF78DCS.(Offset from beginning of record: SMF78DCS)
0	0	SMF783ID1	2	binary	Logical control unit identifier.
2	2	SMF783NTR	2	binary	Number of triplets following.
4	4	SMF783CPDS	4	binary	Offset to I/O queuing configuration data section from start of record, including record descriptor word (RDW).
8	8	SMF783CPDL	2	binary	Length of I/O queuing configuration data section.
10	A	SMF783CPDN	2	binary	Number of I/O queuing configuration data sections.
I/O Queuing Configuration Data Section (Present for subtype 3) This section contains one entry per channel path, described by triplet SMF783CPDS.(Offset from beginning of record: SMF783CPDS)
0	0	SMF783CPID	1	binary	Channel path identifier.
1	1	SMF783CPST	1	binary	Channel path status Bit Meaning When Set 0 Channel path installed 1 Channel path online 2 Channel path varied 3 Channel path offline to all devices of the LCU 4 Channel path connection to all devices of the LCU altered by VARY PATH command during interval 5 Measured channel path data incorrect 6 Channel path is DCM managed 7 CHPID manipulated, requiring data reset
2	2	SMF783CUN	2	binary	Number of control units attached.
4	4	SMF783CU1	2	binary	First control unit attached.
6	6	SMF783CU2	2	binary	Second control unit attached.
8	8	SMF783CU3	2	binary	Third control unit attached.
10	A	SMF783CU4	2	binary	Fourth control unit attached.
12	C	SMF783CUB	4	binary	Number of times control unit was busy.
16	10	SMF783PT	4	binary	Number of times channel path was taken.
20	14	--	4	binary	Reserved.
24	18	SMF783DPB	4	binary	Number of times that the Director Port was busy.
28	1C	SMF783CBT	4	binary	Delay time of an I/O request because the control unit was busy.
32	20	SMF783CMR	4	binary	Initial command response time until the first command is indicated as accepted by the device.
36	24	SMF783SBS	4	binary	Switch busy count summation: contains the switch busy counts received for all partitions.
40	28	--	4	binary	Reserved.
44	2C	SMF783CPXF	1	binary	Channel path extended flags Bit Meaning When Set 0 Extended I/O measurement-block data available 1-7 Reserved.
45	2D	SMF783CPAT	1	binary	Path attributes Value Meaning 0 Not specified for this path. 1 Preferred path. 2 Non-preferred path.
I/O Queuing Data Section (Present for subtype 3) This section contains entry one per LCU, described by triplet SMF78ASS.(Offset from beginning of record: SMF78ASS)
0	0	SMF783ID2	2	binary	Logical control unit identifier.
2	2	SMF783DST	1	binary	Data Status Bit Meaning When Set 0 No hardware measurements available 1 Dynamically changed 2 Dynamically added 3 Configuration change attempted 4 LCU contains DCM managed channels 5 Path attributes are valid. 6 LCU has HyperPAV devices. 7 Reserved
3	3	--	1	binary	Reserved.
4	4	SMF783QSM	4	binary	Sum of total length of the CU-HDR queue.
8	8	SMF783QCT	4	binary	Number of entries on the CU-HDR queue.
12	C	SMF783MCMN	2	binary	Minimum number of DCM managed channels used.
14	E	SMF783MCMX	2	binary	Maximum number of DCM managed channels used.
16	10	SMF783MCDF	2	binary	Defined number of DCM managed channels.
18	12	--	2	binary	Reserved.
20	14	SMF783PTM	4	binary	Accumulated path taken count for DCM managed channels.
24	18	SMF783DPBM	4	binary	Accumulated director port busy count for DCM managed channels.
28	1C	SMF783CUBM	4	binary	Accumulated control unit busy count for DCM managed channels.
32	20	SMF783CBTM	4	binary	Accumulated delay time for DCM-managed channels because of a busy control unit.
36	24	SMF783CMRM	4	binary	Accumulated initial command response time for DCM-managed channels.
40	28	SMF783SBSM	4	binary	Switch busy count summation for DCM-managed channels.
44	2C	SMF783DCTM	4	binary	Accumulated device connect time in units of 128 microseconds.
48	30	SMF783DDTM	4	binary	Accumulated device disconnect time in units of 128 microseconds.
52	34	SMF783CSST	4	binary	Channel subsystem wait time in units of 128 microseconds.
56	38	SMF783HCNT	2	binary	Number of HyperPAV sections for that LCU.
58	3A	SMF783HIX	2	binary	Index to first HyperPAV section for that LCU.
HyperPAV Data Section (Present for subtype 3) This section contains one entry per CU, described by SMF78HPS. (Offset from beginning of record: SMF78HPS)
0	0	SMF783HLCU	2	binary	HyperPAV Logical control unit identifier.
2	2	SMF783HCU	2	binary	HyperPAV control unit identifier. 4 4 * 4 * Reserved.
8	8	SMF783HNAI	4	floating	The number of times an I/O could not start because no HyperPAV-aliases were available.
12	C	SMF783HTIO	4	floating	The total number of HyperPAV I/O requests for the LSS.
16	10	SMF783HAIU	4	binary	The high water mark of the number of in-use HyperPAV-alias devices for the LSS.
20	14	SMF783HCAD	4	binary	The high water mark of the number of aliases concurrently in use by one of the HyperPAV-base devices of the LSS.
24	18	SMF783HIOQ	4	binary	The high water mark of queued I/O request

The table above is based on the description provided by IBM in its "MVS Systems Management Facilities (SMF)" manual.

Spectrum SMF Writer - the 4GL SMF Report Writer.

SMF Type 78 Record

This table shows the record layout for type 78 SMF records (RMF Virtual Storage and I/O Queuing Activity - z/OS 1.13).

It's easy to report on SMF 78 data!

This table shows the record layout for type 78 SMF records
(RMF Virtual Storage and I/O Queuing Activity - z/OS 1.13).