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SMF Type 76 Record

This table shows the record layout for type 76 SMF records
(RMF Trace Activity - z/OS 1.11).

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

Purpose: Record type 76 is written at the end of each measurement interval. One record is written for each field name sampled during the interval.

As with all SMF records produced by RMF, record type 76 contains a header section and RMF product section. These are followed by:

  • Trace Control Section Contains the number of sample sets in the trace.
  • Trace Data Section Contains information on the minimum value of the field, the maximum value of the field, the sum of the squared values of the field, and the final value sampled from the field.
  • Variable Trace Data Section Contains the trace values collected for each set grouped at the end of the record

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SMF Type 76 Record -- RMF Trace Activity - z/OS 1.11
Offset
(Dec.)
Offset
(Hex)
NameLengthFormatDescription
00SMF76LEN2binary
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. This field and the next are collectively referred at as the RDW. (record descriptor word). See “Standard SMF Record Header” on page 13-1 for a detailed description.
22SMF76SEG2binary
Segment descriptor (see record length field).
44SMF76FLG1binary
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.
55SMF76RTY1binary
Record type 76 (X'4C').
66SMF76TME4binary
Time since midnight, in hundredths of a second, when the record was moved into the SMF buffer.
10ASMF76DTE4packed
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.
14ESMF76SID4EBCDIC
System identification (from the SMFPRMxx SID parameter).
1812SMF76SSI4EBCDIC
Subsystem identification (‘RMF').
2216SMF76STY2binary
Record subtype=1.
2418SMF76TRN2binary
Number of triplets in this record. A triplet is a set of three SMF fields (offset/length/number values) that defines a section of the record. The offset is the offset from the RDW.
261A--2binary
Reserved.
281CSMF76PRS4binary
Offset to RMF product section from start of record, including record descriptor word (RDW).
3220SMF76PRL2binary
Length of RMF product section.
3422SMF76PRN2binary
Number of RMF product sections.
3624SMF76TCS4binary
Offset to trace control section from start of record, including record descriptor word (RDW).
4028SMF76TCL2binary
Length of trace control section.
422ASMF76TCN2binary
Number of trace control sections.
442CSMF76TDS4binary
Offset to trace data entry section from start of record, including record descriptor word (RDW).
4830SMF76TDL2binary
Length of trace data entry section.
5032SMF76TDN2binary
Number of trace data entry sections.
5234SMF76VFS4binary
Offset to variable format set from start of record, including record descriptor word (RDW).
5638SMF76VFL2binary
Length of variable format set.
583ASMF76VFN4binary
Number of variable format sets.
RMF Product Section
(Offset from beginning of record: SMF76PRS)
00SMF76MFV2packed
RMF version number.
22SMF76PRD8EBCDIC
Product name (‘RMF').
10ASMF76IST4packed
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.
14ESMF76DAT4packed
Date when the RMF measurement interval started, in the form 0cyydddF. See “Standard SMF Record Header” on page 13-1 for a detailed description.
1812SMF76INT4packed
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.)
2216--2binary
Reserved.
2418SMF76SAM4binary
Number of RMF samples.
281C--2binary
Reserved.
301ESMF76FLA2binary
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.
3220--4binary
Reserved.
3624SMF76CYC4packed
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.
4028SMF76MVS8EBCDIC
MVS software level (consists of an acronym and the version, release, and modification level - ZVvvrrmm).
4830SMF76IML1binary
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.
5032SMF76PTN1binary
PR/SM partition number of the partition that wrote this record.
5133SMF76SRL1binary
SMF record level change number (X'56' for z/OS V1R11 RMF). This field enables processing of SMF record level changes in an existing release.
5234SMF76IET8char
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).
603CSMF76LGO8binary
Offset GMT to local time (STCK format).
6844SMF76RAO4binary
Offset to reassembly area relative to start of RMF product section.
7248SMF76RAL2binary
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.
744ASMF76RAN2binary
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 (SMF76RAO) and length (SMF76RAL) are only valid if SMF76RAN = 1. A reassembly area is only present in broken records.
764CSMF76OIL2binary
Original interval length as defined in the session or by SMF (in seconds).
784ESMF76SYN2binary
SYNC value in seconds.
8050SMF76GIE8binary
Projected gathering interval end (STCK format) GMT time.
8858SMF76XNM8EBCDIC
Sysplex name as defined in parmlib member COUPLExx.
9660SMF76SNM8EBCDIC
System name for current system as defined in parmlib member IEASYSxx SYSNAME parameter.
Reassembly Area
(Offset from beginning of record: SMF76PRS + SMF76RAO)
00SMF76RBR2binary
Total number of broken records built from the original large record.
22SMF76RSQ2binary
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 SMF76RBR.
44SMF76RIO4binary
Offset to first reassembly information block relative to start of reassembly area header.
88SMF76RIL2binary
Length of reassembly information block.
10ASMF76RIN2binary
Number of reassembly information blocks (same value as SMF76TRN in header section).
12C--4binary
Reserved.
Reassembly Area Information Block
(Offset from beginning of record: SMF76PRS + SMF76RA0 + SMF76RIO)
00SMF76RNN2binary
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.
22SMF76RPP2binary
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 SMF76RNN 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.
Trace Control Section
(Offset from beginning of record: SMF76TCS)
00SMF76NUM2binary
Number of sample sets (lines of data) in the trace.
22--2binary
Reserved.
Trace Data Section
(Offset from beginning of record: SMF76TDS)
00SMF76NAM8EBCDIC
Field name.
88SMF76OPT1binary
Trace options Bit Meaning When Set 0 Minimum value of the field is contained in the SMF record 1 Maximum value of the field is contained in the SMF record 2 The sum of the values required to calculate the average of the field is contained in the SMF record 3 The sum of the squared values required to calculate the standard deviation of the field is contained in the SMF record 4 End value of the field is contained in the SMF record 5 All options selected 6 Domain tracing terminated 7 This entry is a domain field.
99SMF76OP11binary
Trace options Bit Meaning When Set 0 LPB trace requested 1 LPB trace request ended 2 Traced data in record is valid 3-7 Reserved.
10ASMF76SLN1binary
Length of a set.
11BSMF76DLN1binary
Length of a field sampled.
12CSMF76SSS2binary
Standard samples per set used.
14ESMF76SSL2binary
Samples per set.
1610SMF76MIN4binary
Minimum value during interval.
2014SMF76MAX4binary
Maximum value during interval.
2418SMF76AVG8binary
Accumulated value used to compute the average.
3220SMF76STD12binary
Sum of squares (used to compute standard deviation).
442CSMF76ENV4binary
End value of field.
Variable Format Sets Section
(Offset from beginning of record: SMF76VFS)
00SMF76D4binary
Trace values collected for each set, stored in an array of either fullwords or halfwords, depending on the length of the field being sampled. There will be one group of values for each sample set (line of data) in the trace.

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

Copyright 2017.
Pacific Systems Group.
All rights reserved.


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