SMF Type 76 Record
This table shows the record layout for type 76 SMF records
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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.
Segment descriptor (see record length field).
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.
Record type 76 (X'4C').
Time since midnight, in hundredths of a second, when the record was moved into the SMF buffer.
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.
System identification (from the SMFPRMxx SID parameter).
Subsystem identification (‘RMF').
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.
Offset to RMF product section from start of record, including record descriptor word (RDW).
Length of RMF product section.
Number of RMF product sections.
Offset to trace control section from start of record, including record descriptor word (RDW).
Length of trace control section.
Number of trace control sections.
Offset to trace data entry section from start of record, including record descriptor word (RDW).
Length of trace data entry section.
Number of trace data entry sections.
Offset to variable format set from start of record, including record descriptor word (RDW).
Length of variable format set.
Number of variable format sets.
RMF version number.
Product name (‘RMF').
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.
Date when the RMF measurement interval started, in the form 0cyydddF. See “Standard SMF Record Header” on page 13-1 for a detailed description.
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.)
Number of RMF samples.
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.
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.
MVS software level (consists of an acronym and the version, release, and modification level - ZVvvrrmm).
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
PR/SM partition number of the partition that wrote this record.
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.
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).
Offset GMT to local time (STCK format).
Offset to reassembly area relative to start of RMF product section.
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.
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.
Original interval length as defined in the session or by SMF (in seconds).
SYNC value in seconds.
Projected gathering interval end (STCK format) GMT time.
Sysplex name as defined in parmlib member COUPLExx.
System name for current system as defined in parmlib member IEASYSxx SYSNAME parameter.
Total number of broken records built from the original large record.
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.
Offset to first reassembly information block relative to start of reassembly area header.
Length of reassembly information block.
Number of reassembly information blocks (same value as SMF76TRN in header section).
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.
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.
Number of sample sets (lines of data) in the trace.
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.
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.
Length of a set.
Length of a field sampled.
Standard samples per set used.
Samples per set.
Minimum value during interval.
Maximum value during interval.
Accumulated value used to compute the average.
Sum of squares (used to compute standard deviation).
End value of field.
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.