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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. |
MRSTOASS
PrologControl Block Contents
Cross Reference
MRSTOASS Prolog
DSECT NAME - STOASS
FUNCTION - Map a Monitor record.
LOCATED BY -
Through the Monitor Control Area
REFERENCED CONTROL BLOCKS -
MRRECHDR Monitor Record Header
NAME - MRSTOASS
DESCRIPTIVE NAME - Monitor Sample Record
Domain 3 - Storage Domain
Record 11 - Auxiliary Shared Storage Management
(per Exposure)
DESCRIPTION - Describes shared device space usage. A separate
record is generated for each hardware exposure
associated with each CP-owned shared volume.
Note: This record will not contain paging and
spooling allocation. This information is recorded
only on the system owning the device.
MRSTOASS Control Block Contents
Offsets Dec Hex Type Len Name (Dim) Description 0 0 Structure 120 STOASS Start of monitor record 0 0 Character 0 STOASS_MRHDR Record header. See MRRECHDR for details. 0 0 Character 20 MRHDR 0 0 Unsigned 2 MRHDRLEN record length in bytes 2 2 Unsigned 2 MRHDRZER field of zeros 4 4 Unsigned 1 MRHDRDM domain identifier 5 5 Unsigned 1 * 6 6 Unsigned 2 MRHDRRC record identifier 8 8 Character 8 MRHDRTOD Time at which this record was built. In time-of-day (TOD) clock format. See IBM System 370 XA Principle of Operation for explanation of format. 16 10 Character 4 * 20 14 Character 0 MRHDR_END End of header 20 14 Character 6 STOASS_CPVOLSER VOLUME serial identifier 26 1A Character 2 * Reserved for IBM use 28 1C Unsigned 4 STOASS_RDEVSID host subchannel I.D. number defined at initialization 32 20 Unsigned 4 STOASS_EXPCTSRD Total number of pages read from spool. 36 24 Unsigned 4 STOASS_EXPCTSWR Total number of pages written to spool. 40 28 Unsigned 4 STOASS_EXPCTPRD Total number of (non-spool) pages read from this device. Note that page read operations may be directed to devices without any cylinders specifically defined as type PAGE. 44 2C Unsigned 4 STOASS_EXPCTPWR Total number of (non-spool) pages written to this device. Note that page write operations may be directed to devices without any cylinders specifically defined as type PAGE. 48 30 Unsigned 4 STOASS_EXPCURQC The number of page/spool read/writes that are currently active or queued on this logical device 52 34 Character 4 * Reserved for IBM use. Previous field is no longer meaningful. (STOASS_EXPCTACP) 56 38 Unsigned 4 STOASS_EXPCTUSI Number of times user I/O interferes with paging and spooling I/O. 60 3C Unsigned 2 STOASS_SCMSSCH Cumulative count of SSCH and RSCH for this device. This value may be wrapped when format-1 measurement blocks are being used (MTRSYS_CALFLG2 <> x'80'). 62 3E Unsigned 2 * Reserved for IBM use 64 40 Unsigned 4 STOASS_SCGSSCH Fullword cumulative count of SSCH and RSCH for this device. Available when format-1 measurement blocks are being used (MTRSYS_CALFLG2 = x'80'). 68 44 Unsigned 2 STOASS_RDEVDEV Device number 70 46 Unsigned 2 * Reserved and available for IBM use. 72 48 Unsigned 1 STOASS_PHDTYPEF I/O protocol flags 1... .... STOASS_PHDHXPBK The exposure block for this device is an HXPBK. When this bit is ON, the paging subsystem exploits HyperPAV and HPF when those features are enabled and supported by the device. When this bit is OFF, the exposure block is an EXPBK. .1.. .... STOASS_PHDECKD ECKD paging volume. ..1. .... STOASS_PHDSCSI SCSI paging volume. ...1 .... STOASS_PHDFBA FBA paging volume. .... 1... * .... .1.. * .... ..1. * .... ...1 * 73 49 Unsigned 3 * Reserved for IBM use. 76 4C Unsigned 4 STOASS_CALCURQS Current number of pages queued on the paging exposure block originating from either a single-page read or a single-page write request. 80 50 Unsigned 4 STOASS_CALCURQMW Current number of pages queued on the paging exposure block originating from a multi-page write request. 84 54 Unsigned 4 STOASS_CALCURQMR Current number of pages queued on the paging exposure block originating from a multi-page read request. 88 58 Unsigned 4 STOASS_HXPIORAC Current number of paging subsystem IORBKs handed off to the I/O subsystem. This includes IORBKs active on the base and aliases, and any queued off the RDEV of the base. 92 5C Unsigned 4 STOASS_HXPPAIOC Cumulative count of times the paging subsystem's channel program build routine (HCPPAIIO) was stacked. 96 60 Unsigned 4 STOASS_CALSSCHAL Cumulative count of SSCHs issued on HyperPAV alias devices for this base device. 100 64 Unsigned 1 STOASS_HXPFLAGC Capability flags. 1... .... STOASS_HXPHPAV The last I/O to this volume requested alias use. HyperPAV is enabled and the device is a HyperPAV base. The I/O subsystem will determine if the I/O is executed via an alias. .1.. .... STOASS_HXPHPF The last I/O to this volume was a transport mode channel program. HPF is enabled and the device is HPF capable. ..1. .... STOASS_HXPFCMD The last I/O to this volume was a command mode channel program because it was directed to a mapped minidisk or was a retry from an HPF error. ...1 .... * .... 1... * .... .1.. * .... ..1. * .... ...1 * 101 65 Unsigned 1 STOASS_HXPNOHPF HPF failure flags. Usage of HPF has been suspended. 1... .... STOASS_HXPNPROG An error other than missing HPF feature has occurred. .1.. .... STOASS_HXPNFEAT An HPF feature is no longer available. ..1. .... * ...1 .... * .... 1... * .... .1.. * .... ..1. * .... ...1 * 102 66 Unsigned 1 STOASS_HXPRTYFT Retry count for HPF feature lost. 103 67 Unsigned 1 STOASS_HXPRTYOT Retry count for failure other than HPF feature lost. 104 68 Unsigned 4 STOASS_PHDSSCHR Cumulative count of SSCHs (and RSCHs when STOASP_PHDHXPBK is OFF) for read. 108 6C Unsigned 4 STOASS_PHDSSCHW Cumulative count of SSCHs (and RSCHs when STOASP_PHDHXPBK is OFF) for write. 112 70 Unsigned 4 STOASS_PHDLOCRR Cumulative count of Locate Record operations for read (includes the initial search even when the information is provided by a Prefix CCW). 116 74 Unsigned 4 STOASS_PHDLOCRW Cumulative count of Locate Record operations for write (includes the initial search even when the information is provided by a Prefix CCW). 120 78 Character 0 STOASS_END
MRSTOASS 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
STOASS 0 120
STOASS_CALCURQMR 54 4
STOASS_CALCURQMW 50 4
STOASS_CALCURQS 4C 4
STOASS_CALSSCHAL 60 4
STOASS_CPVOLSER 14 6
STOASS_END 78 0
STOASS_EXPCTPRD 28 4
STOASS_EXPCTPWR 2C 4
STOASS_EXPCTSRD 20 4
STOASS_EXPCTSWR 24 4
STOASS_EXPCTUSI 38 4
STOASS_EXPCURQC 30 4
STOASS_HXPFCMD 64 20
STOASS_HXPFLAGC 64 1
STOASS_HXPHPAV 64 80
STOASS_HXPHPF 64 40
STOASS_HXPIORAC 58 4
STOASS_HXPNFEAT 65 40
STOASS_HXPNOHPF 65 1
STOASS_HXPNPROG 65 80
STOASS_HXPPAIOC 5C 4
STOASS_HXPRTYFT 66 1
STOASS_HXPRTYOT 67 1
STOASS_MRHDR 0 0
STOASS_PHDECKD 48 40
STOASS_PHDFBA 48 10
STOASS_PHDHXPBK 48 80
STOASS_PHDLOCRR 70 4
STOASS_PHDLOCRW 74 4
STOASS_PHDSCSI 48 20
STOASS_PHDSSCHR 68 4
STOASS_PHDSSCHW 6C 4
STOASS_PHDTYPEF 48 1
STOASS_RDEVDEV 44 2
STOASS_RDEVSID 1C 4
STOASS_SCGSSCH 40 4
STOASS_SCMSSCH 3C 2
This information is based on z/VM V6R4.0.
Last updated on 5 Oct 2016 at 10:10:09.
Copyright IBM Corporation, 1990, 2016