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SMF Type 99 Record - Subtype 8

This table shows the record layout for type 99 SMF records
(System Resource Manager (SRM) Decisions).

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

Purpose: This record type is written by the SRM component. The records contain:

  • Performance data for each service class period
  • Trace codes representing the SRM actions
  • The data which SRM used to decide which actions to take
  • The controls SRM is using to manage work.

In addition, subtypes 1 and 9 will be written by the SRM component when running in compatibility mode.

Record 99 has the following subtypes:

Subtype 1 Contains system level data, the trace of SRM actions, and data about resource groups. The SRM actions are recorded in trace codes. All trace codes are described in z/OS MVS Programming: Workload Management Services. A subtype 1 record is written every policy interval.

Subtype 2 Contains data for service classes. A subtype 2 record is written every policy interval for each service class if any period in the service class had recent activity.

Subtype 3 Contains service class period plot data. A subtype 3 record is written every policy interval for each service class if any period in the service class had recent activity and plot data.

Subtype 4 Contains information about a device cluster. A device cluster is a set of service classes that compete to use the same non-paging DASD devices. A subtype 4 record is written every policy interval for each device cluster in the system.

Subtype 5 Contains data about monitored address spaces. A subtype 5 record is written each policy interval for each swapped in monitored address space.

Subtype 6 Contains summary information about each service class period, including the resource control settings for the next policy interval. A subtype 6 record is written each policy interval.

Subtype 7 Contains summary information for the Enterprise Storage Server (ESS) with Parallel Access Volume (PAV) feature. A subtype 7 record is written every third policy interval.

Subtype 8 Contains summary information for LPAR CPU management. A subtype 8 record is written each policy interval, when in LPAR mode.

Subtype 9 Contains summary information for dynamic channel path management. A subtype 9 record is written each policy interval.

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SMF Type 99 Record -- System Resource Manager (SRM) Decisions
Offset
(Dec.)
Offset
(Hex)
NameLengthFormatDescription
00SMF99S8_
LEN
2binary
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.
22SMF99S8_
SEG
2binary
Segment descriptor (see record length field).
44SMF99S8_
FLG
1binary
System indicator: Bit Meaning When Set 0-2 Reserved 3-6 Version indicators* 7 Reserved.*See “Standard SMF Record Header” on page 13-1 for a detailed description.
55SMF99S8_
RTY
1binary
Record type 99
66SMF99S8_
TME
4binary
Time since midnight, in hundredths of a second, that the record was moved into the SMF buffer.
100ASMF99S8_
DTE
4packed
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.
140ESMF99S8_
SID
4EBCDIC
System identification (from the SID parameter).
1812SMF99S8_
SSID
4EBCDIC
Sub system identification
2216SMF99S8_
TID
2binary
Record subtype (must be at offset X'16' x).
2418SMF99S8_
SDEF_
LEN
4binary
Length of the self definition section.
Self-Defining Section
(Offset from beginning of record: 28)
00SMF99S8_
POF
4binary
Offset to the product section from the beginning of the record (including RDW).
44SMF99S8_
PLN
2binary
Length of the product section.
66SMF99S8_
PON
2binary
Number of the product section.
88SMF99S8_
DOF
4binary
Offset to data section from beginning of the record (including RDW).
12CSMF99S8_
DLN
2binary
Length of the data section.
14ESMF99S8_
DON
2binary
Number of the data section.
SMF 99 Product Information
(Offset from beginning of record: SMF99S8_POF)
00SMF99S8_
VN2
2binary
Record sub-version. Use to identify changes to the record in the service stream.
22SMF99S8_
RVN
2binary
Record version number.
44SMF99S8_
PNM
8EBCDIC
Product name - SRM
12CSMF99S8_
SLV
8EBCDIC
System level from which record was cut (Copied from CVTPRODN).
2014SMF99S8_
SNM
8EBCDIC
System name from which record was cut (Copied from CVTSNAME)
281CSMF99S8_
PFLG
1binary
Record Flags: Bit Meaning When Set 0 Only a subset of the available data was written to avoid that this record gets larger than 32 KByte 1 Only a subset of the available data is written to this record. The rest follows in subsequent records. This record contains a reassembly area. 2–7 Reserved.
291D--3EBCDIC
Reserved.
Subtype 8 - Self Defining Section
(Offset from beginning of record: SMF99S8_DOF)
00SMF998_
LD_
DATA_
OFFSET
4binary
Offset to LPAR data section from beginning of record (including RDW)
44SMF998_
LD_
DATA_
LENGTH
2binary
Length of a LPAR data section
66SMF998_
LD_
DATA_
NUMBER
2binary
Number of LPAR data sections
88SMF998_
PT_
DATA_
OFFSET
4binary
Offset to priority table section from beginning of record (including RDW)
12CSMF998_
PT_
DATA_
LENGTH
2binary
Length of a priority table section
14ESMF998_
PT_
DATA_
NUMBER
2binary
Number of priority table sections
1610SMF998_
PC_
DATA_
OFFSET
4binary
Offset to period CPU section from beginning of record (including RDW)
2014SMF998_
PC_
DATA_
LENGTH
2binary
Length of a period CPU section
2216SMF998_
PC_
DATA_
NUMBER
2binary
Number of period CPU sections
2418SMF998_
IMAGE_
CPU_
DATA_
OFFSET
4binary
Offset to image CPU section, from beginning of record (including RDW)
281CSMF998_
IMAGE_
CPU_
DATA_
LENGTH
2binary
Length of an image CPU section
301ESMF998_
IMAGE_
CPU_
DATA_
NUMBER
2binary
Number of image CPU sections
3220SMF998_
SYSH_
CPU_
PLOT_
OF
4binary
Offset to the SYSH CPU plot section, from beginning of record (including RDW)
3622SMF998_
SYSH_
CPU_
PLOT_
LN
2binary
Length of SYSH CPU plot section
3824SMF998_
SYSH_
CPU_
PLOT_
ON
2binary
Number of SYSH CPU plot sections
Subtype 8 - LPAR Data Entry Section
(Offset from beginning of record: SMF998_LD_DATA_OFFSET)
00SMF998_
ImageSystemName
8EBCDIC
Image system name
88SMF998_
ControlFlag1
1binary
Control flag that indicates why the rest of the data in the LD entry has not been filled in. Bit Meaning When Set 0 Indicates that this is an overflow SMF 99 subtype 8 record for specified system. The appropriate LD data for this system appears in the first SMF 99 subtype 8 record for this system. 1 Indicates that this system does not have DIAG support. 2 Indicates that LPAR CPU Management is not enabled. 3 Indicates that this system issued DIAG and it failed. 4 Indicates that an image entry was not returned via the DIAG interface for this system. 5 Indicates that the image is non-z/OS. (LINUX) 6-7 Reserved.
99SMF998_
SystemNumber
1binary
System slot number. The source for this value is QUASNUM in IXCYQUAA.
10A--2EBCDIC
Reserved
12CSMF998_
LastSetTime
8binary
Timestamp in STCK format
2014SMF998_
TotalWeight
4binary
Total weight of the CEC
2418SMF998_
NumberOfSharedPhysicalCPUs
1binary
Total number of shared (non-dedicated) physical CPU configured for the CEC use
2519--3EBCDIC
Reserved
281CSMF998_
ImageID
1binary
Image ID of the partition
291DSMF998_
ImageFlags
1binary
Image Flags Bit Meaning When Set 0 Image is capped by software. 1 Identifies whether WLM should be involved in dynamic LPAR weight management. 2 Identifies whether partition is using shared CPs. 3 Identifies whether partition is using dedicated CPs. 4 Identifies whether partition is capped by installation from console. 5-7 Reserved.
301E--2EBCDIC
Reserved
3220SMF998_
NumberCpusActive
2binary
Number of CPUs that are currently active
3422SMF998_
AverageCpuUtilization
2binary
Average CPU utilization
3624SMF998_
ImageInitialWeight
2binary
Image initial weight
3826SMF998_
ImageCurrentWeight
2binary
Image current weight
4028SMF998_
ImageMinimumWeight
2binary
Image minimum weight
422ASMF998_
ImageMaximumWeight
2binary
Image maximum weight
442CSMF998_
Pro_
Time_
Avail
4binary
Total processor time available, includes captured time plus wait time
4830SMF998_
Service_
Units_
Per_
Second
4binary
Unweighted CPU service units per second per online CPU that the hardware is capable of
5234--16EBCDIC
Reserved
6844SMF998_
SoftCapMsu
4binary
Capacity in millions of service units per hour for which the logical partition is licensed.
7248--4EBCDIC
Reserved
764CSMF998_
PricingManagementWeight
4binary
Current pricing management weight.
Subtype 8 - Priority Table Entry Section
(Offset from beginning of record: SMF998_PT_DATA_OFFSET)
00SMF998_
PTPRTY
2binary
Dispatch priority
22SMF998_
PTNP
2binary
New dispatch priority (zero if not changed)
44SMF998_
PTIMDP
4binary
Initial maximum percentage of processor demanded at priority, initial value before any priority moves or slice changes
88SMF998_
PTPMDP
4binary
Projected maximum percentage of processor demanded at priority
12CSMF998_
PTCPUU
4binary
CPU using samples at priority
1610SMF998_
PTCPUD
4binary
CPU delay samples at priority
2014SMF998_
PTW2UR
4binary
Wait-to-using ratio at priority (*16)
2418SMF998_
PTAPU
4binary
Actual measured processor used at priority
281CSMF998_
PTPPU
4binary
Projected processor time to be used at priority
3220SMF998_
PTACMD
4binary
Achievable cumulative max demand for priorities affected by a move
3624--4binary
Reserved
4028SMF998_
PTIMAXD
4binary
Initial cumulative maximum demand
442CSMF998_
PTWMAXD
4binary
Projected cumulative maximum demand
4830SMF998_
PTIAMTW
4binary
Initial average mean time to wait
5234SMF998_
PTWAMTW
4binary
Projected average mean time to wait
Subtype 8 - CPU Period Table Entry Section
(Offset from beginning of record: SMF998_PC_DATA_OFFSET)
00SMF998_
Service_
Class_
Name
8EBCDIC
Internal service class name
88SMF998_
Importance
2binary
Importance
10ASMF998_
Period_
Number
2binary
Period number
12C--4EBCDIC
Reserved
1610SMF998_
Dasd_
Io_
Delay_
Sample
4binary
Copy of I/O delay samples
2014SMF998_
Non_
Idle_
Samp
4binary
Number of non-idle samples
2418SMF998_
Cpu_
Using_
Sample
4binary
Copy of CPU using samples
281CSMF998_
Cpu_
Delay_
Sample
4binary
Copy of CPU delay samples
3220SMF998_
Wlm_
Queue_
Delay_
Sample
4binary
Copy of WLM queue delay samples
3624SMF998_
Dasd_
Io_
Using_
Sample
4binary
Copy of DASD I/O using samples
4028SMF998_
Max_
Dem_
Per
4binary
Maximum percentage of processor time demanded (constant across policy adjustment)
442CSMF998_
Pi_
Achieved
4binary
Performance index achieved, adjusted into range, used to select donors and receivers
4830SMF998_
Sysplex_
Pi_
Achieved
4binary
Sysplex performance index achieved, adjusted into range, used to select donors and receivers
5234SMF998_
Service_
Ow
4binary
Average service over a WLM-defined moving interva
5638SMF998_
Mtw_
Adj
4binary
Mean time to wait adjusted by cccmxmtw
603CSMF998_
Base_
Priority
2binary
Base dispatching priority
623ESMF998_
Cap_
Num_
Slices
2binary
Current number of sleep slices, or 0
6440SMF998_
Work_
Pro_
Used
4binary
Working variable for assess for processor used
6844SMF998_
Current_
Ach_
Dem_
Per
4binary
Current achievable demand percentage for the period calculated from the initial PDT fields.
7248SMF998_
Ach_
Dem_
Per
4binary
Working variable for achievable demand percentage
764CSMF998_
Old_
Work_
Pro_
Used
4binary
Work field computed during phase 1 move
8050SMF998_
Proj_
Pi_
Com
4binary
Unadjusted projected PI for committed actions only, used as base for projections
8454SMF998_
Using_
Delta
4binary
Computed during assessment
8858SMF998_
LparMgmt_
Delay_
Delta
4binary
Delay delta computed by LPAR Mgmt algorithm. This field captures the delay delta for SMF99 recording before it is cleared out.
925CSMF998_
Cpu_
Cap_
Delay_
Sample
4binary
CPU capping delay sample
9660SMF998_
Iosub_
Samples_
Data_
Offset
4binary
Offset to I/O subsystem samples data from beginning of record (including RDW)
10064SMF998_
Iosub_
Samples_
Data_
Length
2binary
Length of a I/O subsystem samples data section
10266SMF998_
Iosub_
Samples_
Data_
number
2binary
Number of I/O subsystem samples data sections
10468SMF998_
Sysplex_
Proj_
Pi_
Com
4binary
Unadjusted sysplex projected PI for committed actions only, used as base for projections
1086CSMF998_
PC_
CSS_
NUMBER
1binary
Channel subsystem identifier
1096D--11EBCDIC
Reserved
Subtype 8 - LPAR CPU Data for a Partition in an LPAR Cluster Section
(Offset from beginning of record: SMF998_IMAGE_CPU_DATA_OFFSET)
00SMF998_
LC_
Service_
Class_
Name
8EBCDIC
Internal service class name
88SMF998_
LC_
Period_
Number
2binary
Period number * 2 binary Reserved
12CSMF998_
LC_
Machine_
Percentage
4binary
Percent of the CEC shared capacity used by the partition either based on its current weight or utilization
1610SMF998_
LC_
Max_
Dem_
Per
4binary
Maximum percentage of processor time demanded by the image during current interval (scaled by 10)
2014SMF998_
LC_
LastInt_
Cpu_
Using
4binary
Last interval CPU using samples count
2418SMF998_
LC_
LastInt_
Cpu_
Delay
4binary
Last interval CPU delay samples count
281CSMF998_
LC_
LastInt_
Non_
Idle
4binary
Last interval non idle sample count which include using, delay and other
3220SMF998_
LC_
Avg_
Cpu_
Using
4binary
Average CPU using samples count
3624SMF998_
LC_
Avg_
Cpu_
Delay
4binary
Average CPU delay samples count
4028SMF998_
LC_
Using_
Delta
4binary
Using delta
442CSMF998_
LC_
Delay_
Delta
4binary
Delay delta
4830SMF998_
LC_
Work_
Max_
Dem_
Per
4binary
New maximum percentage of processor time demanded by the image during current interval as a result of weight change (scaled by 10)
5234SMF998_
LC_
Work_
Weighted_
Max_
Dem_
Per
4binary
Maximum percentage of processor time demanded by the image as a result of weight change, with respect to its current machine share (based on weight or utilization)
5638SMF998_
LC_
Work_
W2U_
Ratio
4binary
New W2U ratio due to change in LPAR weight
603CSMF998_
LC_
Pi_
Delta
4binary
PI delta projection
6440SMF998_
LC_
Sysplex_
Pi_
Delta
4binary
Sysplex PI delta projection
Subtype 8 - SYSH CPU Plot Section
(Offset from beginning of record: SMF998_SYSH_CPU_PLOT_OF)
00SMF99_
SYSH_
CPU_
PLOT_
INUM
4binary
Image number
44SMF99_
SYSH_
CPU_
PLOT_
BW
4binary
Bucket width
88SMF99_
SYSH_
CPU_
PLOT_
LSTX
4binary
Last plotted X bucket
12CSMF99_
SYSH_
CPU_
PLOT_
POINTS_
OF
4binary
Offset of point entries
1610SMF99_
SYSH_
CPU_
PLOT_
POINTS_
ON
2binary
Number of point entries
1812SMF99_
SYSH_
CPU_
PLOT_
POINTS_
LN
2binary
Length of a point entry
Subtype 8 - I/O Subsystems Samples Data Section
(Offset from beginning of record: SMF99_SYSH_CPU_PLOT_POINTS_OF)
00SMF99_
IOSUB_
Index
2binary
Subsystem index. This correlates with SMF999_IOSUB_INDEX.
22--2binary
Reserved
44SMF99_
IOSUB_
ConnectSamples
2binary
Connect samples.
66SMF99_
IOSUB_
PendingSamples
2binary
Pending samples.

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

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