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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
Storage Layout
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 64 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 spool reads
36 24 Unsigned 4 STOASS_EXPCTSWR Total number of spool writes
40 28 Unsigned 4 STOASS_EXPCTPRD Total number of page read
operations for 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 page write
operations for 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 Unsigned 4 STOASS_EXPCTACP The number of page/spool
reads/writes that are added onto
an executing channel program
without executing a RSCH or SSCH
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
62 3E Unsigned 2 * Reserved for IBM use
64 40 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 64
STOASS_CPVOLSER 14 6
STOASS_END 40 0
STOASS_EXPCTACP 34 4
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_MRHDR 0 0
STOASS_RDEVSID 1C 4
STOASS_SCMSSCH 3C 2
This information is
based on z/VM V4R3.0.
Last updated on 1 May 2002 at 16:20:33.
Copyright IBM Corporation, 1990, 2002