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Programming Interface Information:
The Monitor Records are intended Programming Interfaces that allow the customer to write programs to obtain services of z/VM. |
MRPRCPUP
PrologControl Block Contents
Cross Reference
MRPRCPUP Prolog
DSECT NAME - PRCPUP
FUNCTION - Map a Monitor record.
LOCATED BY -
Through the Monitor Control Area
REFERENCED CONTROL BLOCKS -
MRRECHDR Monitor Record Header
NAME - MRPRCPUP
DESCRIPTIVE NAME - Monitor Event Record
Domain 5 - Processor Domain
Record 16 - Park/Unpark Decision
DESCRIPTION - Describes the park/unpark decision that was
most recently made. z/VM parks CPUs/cores it
believes it will not need in the next
interval, when running in vertical
polarization mode. This record provides data
which influences this decision, along with
the decisions made.
This record consists of several data fields,
followed by a series of stanzas. There is
one stanza for each CPU type of which we
have at least 1 CPU/core online in the partition.
Each stanza contains information about the
park/unpark decision which is specific to
that CPU type.
NOTE: When a field in this record uses the term "CPU/core",
the meaning of the field changes based on whether
Multithreading (MT) is enabled for this partition.
Refer to Monitor Sample Record Domain 1 Record 4
(MRMTRSYS) to determine whether MT is enabled for
this partition as well as the number of threads for
each CPU type.
When MT is not enabled, a physical core contains
only one CPU:
- CPU : central processing unit (processor).
- CORE : physical unit containing one CPU.
In this environment the core has
1 thread, the term thread is not used,
and the term "CPU" is generally favored
over the term "core".
When MT is enabled, a physical core contains one or
more CPUs (aka "threads"):
- CPU : central processing unit (processor).
Identified by CPU address which consists
of core ID and thread ID.
- CORE : physical unit containing one or more CPUs
(aka "threads"). All CPUs of a core have
the same CPU type.
- THREAD: synonym for a CPU that is a memeber of a
core. Each thread on a core has a
distinct thread ID (TID), numbered from
0 up to the maximum thread ID available
on the core.
MRPRCPUP Control Block Contents
Offsets Dec Hex Type Len Name (Dim) Description 0 0 Structure 80+ PRCPUP Start of monitor record 0 0 Character 0 PRCPUP_MRHDR Record header. See MRRECHDR for details. 0 0 Character 20 MRHDR 0 0 Unsigned 2 MRHDRLEN 2 2 Unsigned 2 MRHDRZER 4 4 Unsigned 1 MRHDRDM 5 5 Unsigned 1 * 6 6 Unsigned 2 MRHDRRC 8 8 Character 8 MRHDRTOD 16 10 Character 4 * 20 14 Character 0 MRHDR_END 20 14 Unsigned 2 PRCPUP_SCOUNT Number of stanzas in this record 22 16 Unsigned 2 PRCPUP_SSIZE Size of a stanza (bytes) 24 18 Unsigned 2 PRCPUP_SOFFSET Offset within this record to the first stanza. 26 1A Unsigned 2 PRCPUP_MAXRPROC This value defines the number of valid bits in bit masks: PRCPUP_RCCUPKMK, PRCPUP_CALONLIN, PRCPUP_SRXLCPUA. 28 1C Unsigned 2 PRCPUP_OFSUPKMK PRCPUP_RCCUPKMK field offset from beginning of the stanza. 30 1E Unsigned 2 PRCPUP_OFSONLIN PRCPUP_CALONLIN field offset from beginning of the stanza. 32 20 Unsigned 2 PRCPUP_OFSLCPUA PRCPUP_SRXLCPUA field offset from beginning of the stanza. 34 22 Character 2 * Reserved for IBM use 36 24 Bitstring 1 PRCPUP_CALFLAG Flag byte 1... .... PRCPUP_WHIOK Running in an environment which provides the information needed to make excess capacity predictions. .1.. .... * ..1. .... * ...1 .... * .... 1... * .... .1.. * .... ..1. * .... ...1 * 37 25 Unsigned 1 PRCPUP_WHIXCT Number of valid samples required to make a floor projection of unentitled capacity. This value is a common constant for all CPU types. 38 26 Unsigned 1 PRCPUP_WHIUCT Number of valid samples required to make a ceiling prediction of CPU/core utilization. This value is a common constant for all CPU types. 39 27 Unsigned 1 PRCPUP_WHIVCT Number of valid samples required to make a ceiling prediction of system T/V. This value is a common constant for all CPU types. 40 28 Unsigned 4 PRCPUP_RCCSIGCT Cumulative count of successful SIGP restarts. Does not include SIGP restarts to be done for the park/unpark operation described in this monitor record. 44 2C Unsigned 8 PRCPUP_RCCSIGTD Cumulative duration of time spent in SIGP restarts expressed as the sum of the TOD clock increments between the time the SIGP restart started and returned. Does not include SIGP restarts to be done for the park/unpark operation described in this record. 52 34 Unsigned 4 PRCPUP_SRMTVCRL T/V Critical Value. Used as a low threshold to decide whether a T/V ratio projected for the next interval is high enough that the processor parking algorithm should be adjusted to limit parking of extra processors. Expressed as a scaled number where x'00010000' = 1.0. Projected T/V ratio is no longer used in the park decision. 56 38 Unsigned 4 PRCPUP_SRMTVCRH T/V Critical Value. Used as a high threshold to decide whether a T/V ratio projected for the next interval is low enough that the processor parking algorithm should be adjusted to limit parking of extra processors. Expressed as a scaled number where x'00010000' = 1.0. Projected T/V ratio is no longer used in the park decision. 60 3C Character 8 PRCPUP_WHITOD Time of day value when processor utilization data was obtained. 68 44 Unsigned 4 PRCPUP_WHIDELAY Cumulative count of times Diagnose x'204' busy conditions occurred and delayed utilization data acquisition to the next timer interval. 72 48 Unsigned 4 * Reserved for IBM use. 76 4C Unsigned 1 PRCPUP_SYSPRKFG Value indicating how z/VM unparks when GPD is on: 0 = unpark large 1 = unpark medium 2 = unpark small 77 4D Character 3 * Reserved for IBM use. 80 50 Character 0 * Additional fields may be inserted before here. Use offsets to locate any fields after this point. 80 5C Character 0 PRCPUP_STANZAS Start of first stanza 0 0 Structure 68+ PRCPUP_STANZA Start of a stanza of per-CPU- type park/unpark decision information. The first stanza should be located by adding PRCPUP_SOFFSET to the address of this record. Subsequent stanzas should be located by adding PRCPUP_SSIZE to the address of the current stanza 0 0 Unsigned 1 PRCPUP_CPUTYPE CPU type being described. 0=CP, 2=zAAP, 3=IFL, 4=ICF, 5=zIIP. 1 1 Unsigned 1 PRCPUP_WHIOFLG Flags for this partition. 1... .... PRCPUP_WHIODED LPAR has dedicated CPUs/cores. .1.. .... PRCPUP_WHIOCAP Partition has capping on. ..1. .... PRCPUP_WHIONO Local LPAR has no CPUs/cores of this type. ...1 .... PRCPUP_WHIOALL Local LPAR is the only LPAR with CPUs/cores of this type. .... 1... PRCPUP_WHIOXPR Excess capacity prediction was successfully made on this pass. .... .1.. PRCPUP_WHIOCAPC CpuTypeCap is on, and the converted value in PRCPUP_WHIOCAPV was originally provided in terms of units. .... ..1. PRCPUP_WHIOGCPC LPAR Group Capping is on and the converted value in PRCPUP_WHIOGCPV was originally provided in terms of CPU/core units. .... ...1 * 2 2 Character 2 * Reserved for IBM use 4 4 Unsigned 4 PRCPUP_WHIOCUTI Calculated utilization in interval: number of physical CPUs/cores of this type which were consumed. Represented as a scaled number where x'10000' = 1 physical CPU/core. 8 8 Unsigned 4 PRCPUP_WHIOPUTI Ceiling prediction of CPU/core utilization for next interval, in the same units as PRCPUP_WHIOCUTI. 12 C Unsigned 4 PRCPUP_SRXCPPAD Amount of CPU capacity added to ceiling prediction of CPU/core utilization. A scaled number where X'00010000' represents one CPU/core. This is the SRM CPUPAD value. 16 10 Unsigned 1 PRCPUP_SRXWRKCI Confidence percentage used to make ceiling prediction of CPU/core utilization. 17 11 Unsigned 1 PRCPUP_CALUCALG Algorithm used for the ceiling prediction of CPU/core utilization. 1=standard (normal) 2=standard adjusted 3=standard reverse 4=average 18 12 Unsigned 1 PRCPUP_WHIOUCT Number of valid samples for the ceiling prediction of CPU/core utilization. 19 13 Character 1 * Reserved for IBM use 20 14 Unsigned 2 PRCPUP_SRXPMAX Maximum number of CPUs/cores that can be parked in an interval. 22 16 Character 2 * Reserved for IBM use 24 18 Unsigned 4 PRCPUP_WHIOENT This partition's entitlement to CPU/core resource, represented in the same units as PRCPUP_WHIOCUTI. This field is valid when the PRCPUP_CALFLAG.PRCPUP_WHIOK bit (x80) is ON. 28 1C Unsigned 4 PRCPUP_WHIOCECE Calculated amount of excess CPU/core capacity available on shared physical CPUs/cores in in the CPC over the interval; number of physical CPUs/cores of this type which were available to all shared LPs which are competing for CPU/core capacity beyond their entitlement (includes both CPU/core capacity above entitlement used and unused capacity). In the same units as PRCPUP_WHIOCUTI. This field is valid when the PRCPUP_CALFLAG.PRCPUP_WHIOK bit (x80) is ON. 32 20 Unsigned 4 PRCPUP_WHIOCXC Calculated share of extra capacity in interval: number of physical CPUs/cores of this type which this partition could have used, in the same units as PRCPUP_WHIOCUTI. This field is valid when the PRCPUP_CALFLAG.PRCPUP_WHIOK bit (x80) is ON. 36 24 Signed 4 PRCPUP_WHIOPXC Unentitled capacity floor projection for the next interval, in the same units as PRCPUP_WHIOCUTI. This field is valid when PRCPUP_WHIOFLG bit x08 is ON. 40 28 Unsigned 1 PRCPUP_CALFCONF Confidence percentage used to make floor projection of unentitled capacity. The value is invalid if it contains xFF (255). 100 = EXCESSUSE NONE 90 = EXCESSUSE LOW 70 = EXCESSUSE MED 50 = EXCESSUSE HIGH 41 29 Unsigned 1 PRCPUP_CALFLALG Algorithm used for the floor projection of unentitled capacity. 1=standard (normal) 2=standard (normal) adjusted 3=standard (normal) reverse 4=average 42 2A Unsigned 1 PRCPUP_WHIOXCT Number of valid samples for the floor projection of unentitled capacity. 43 2B Character 1 * Reserved for IBM use 44 2C Unsigned 2 PRCPUP_RCCNUPK Number of CPUs that are requested to be in the unparked state for the next interval 46 2E Character 2 * Reserved for IBM use 48 30 Unsigned 4 PRCPUP_SRXNOTVH Capacity assigned to all CPUs/cores other than vertical high CPUs/cores. 52 34 Unsigned 4 PRCPUP_WHIOCAPV When PRCPUP_WHIOFLG bit x04 is ON, contains the maximum number of physical CPUs/cores of this type which our partition is permitted to use, a scaled number where X'00010000' represents one CPU/core. 56 38 Unsigned 4 PRCPUP_WHIOCTVR Calculated T/V ratio in the interval. Expressed as a scaled number where x'00010000' = 1.0. A value of binary zeroes indicates that T/V was not calculated for the most recent interval. The T/V calculation is capped at a value of x'00FFFFFF'. 60 3C Unsigned 4 PRCPUP_WHIOPTVR Ceiling projection for T/V ratio for the next interval. Expressed in the same units as WHIOCTVR. A value of binary zeroes indicates that a prediction was not made for the interval. T/V ratio no longer affects park decisions. 64 40 Unsigned 1 PRCPUP_SRXTVCNF Confidence percentage used to make ceiling prediction of T/V ratio. T/V ratio no longer affects park decisions. 65 41 Unsigned 1 PRCPUP_CALTVALG Algorithm used for the ceiling projection of T/V ratio. 1=standard (normal) 2=standard adjusted 3=standard reverse 4=average T/V ratio no longer affects park decisions. 66 42 Unsigned 1 PRCPUP_WHIOTVCT Number of valid samples for the ceiling prediction of T/V ratio. T/V ratio no longer affects park decisions. 67 43 Character 1 * Reserved for IBM use 68 44 Unsigned 4 PRCPUP_WHIOGCPV When PRCPUP_WHIOFLG bit x02 is ON, contains the maximum aggregate number of physical CPUs/cores of this type which the LPAR Group that this partition is a member of is permitted to use, a scaled number where X'00010000' represents one CPU/core. 72 48 Character 0 * Additional fields may be inserted before here. Use offsets to locate any fields after this point. 0 0 Bit 1 PRCPUP_RCCUPKMK(MAXVMPRC) Bitmask showing requested unparked state. 1=unparked 0 0 Bit 1 PRCPUP_CALONLIN(MAXVMPRC) Bitmask indicating which CPUs are currently online. 1=online 0 0 Bit 1 PRCPUP_SRXLCPUA(MAXVMPRC) Bitmask indicating which CPUs are currently in the unparked state. 1=unparked * * Character 0 PRCPUP_END_STANZA End of stanza
MRPRCPUP Cross Reference
Hex Hex
Name Offset Length Value
MRHDR 0 20
MRHDR_END 14 0
MRHDRDM 4 1
MRHDRLEN 0 2
MRHDRRC 6 2
MRHDRTOD 8 8
MRHDRZER 2 2
PRCPUP 0 80+
PRCPUP_CALFCONF 28 1
PRCPUP_CALFLAG 24 1
PRCPUP_CALFLALG 29 1
PRCPUP_CALONLIN 0 *
PRCPUP_CALTVALG 41 1
PRCPUP_CALUCALG 11 1
PRCPUP_CPUTYPE 0 1
PRCPUP_END_STANZA * *
PRCPUP_MAXRPROC 1A 2
PRCPUP_MRHDR 0 0
PRCPUP_OFSLCPUA 20 2
PRCPUP_OFSONLIN 1E 2
PRCPUP_OFSUPKMK 1C 2
PRCPUP_RCCNUPK 2C 2
PRCPUP_RCCSIGCT 28 4
PRCPUP_RCCSIGTD 2C 8
PRCPUP_RCCUPKMK 0 *
PRCPUP_SCOUNT 14 2
PRCPUP_SOFFSET 18 2
PRCPUP_SRMTVCRH 38 4
PRCPUP_SRMTVCRL 34 4
PRCPUP_SRXCPPAD C 4
PRCPUP_SRXLCPUA 0 *
PRCPUP_SRXNOTVH 30 4
PRCPUP_SRXPMAX 14 2
PRCPUP_SRXTVCNF 40 1
PRCPUP_SRXWRKCI 10 1
PRCPUP_SSIZE 16 2
PRCPUP_STANZA 0 68+
PRCPUP_STANZAS 4C 0
PRCPUP_SYSPRKFG 4C 1
PRCPUP_WHIDELAY 44 4
PRCPUP_WHIOALL 1 10
PRCPUP_WHIOCAP 1 40
PRCPUP_WHIOCAPC 1 04
PRCPUP_WHIOCAPV 34 4
PRCPUP_WHIOCECE 1C 4
PRCPUP_WHIOCTVR 38 4
PRCPUP_WHIOCUTI 4 4
PRCPUP_WHIOCXC 20 4
PRCPUP_WHIODED 1 80
PRCPUP_WHIOENT 18 4
PRCPUP_WHIOFLG 1 1
PRCPUP_WHIOGCPC 1 02
PRCPUP_WHIOGCPV 44 4
PRCPUP_WHIOK 24 80
PRCPUP_WHIONO 1 20
PRCPUP_WHIOPTVR 3C 4
PRCPUP_WHIOPUTI 8 4
PRCPUP_WHIOPXC 24 4
PRCPUP_WHIOTVCT 42 1
PRCPUP_WHIOUCT 12 1
PRCPUP_WHIOXCT 2A 1
PRCPUP_WHITOD 3C 8
PRCPUP_WHIUCT 26 1
PRCPUP_WHIVCT 27 1
PRCPUP_WHIXCT 25 1
PRCPUP_WHIOXPR 1 08
This information is based on z/VM V7R3.0.
Last updated on 09 September 2022 at 14:30:05.
Copyright IBM Corporation, 1990, 2022