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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. |
MRIODMOF
PrologControl Block Contents
Cross Reference
MRIODMOF Prolog
DSECT NAME - IODMOF
FUNCTION - Map a Monitor record.
LOCATED BY -
Through the Monitor Control Area
REFERENCED CONTROL BLOCKS -
MRRECHDR Monitor Record Header
NAME - MRIODMOF
DESCRIPTIVE NAME - Monitor Event Record
Domain 6 - I/O Domain
Record 14- Set Subchannel Measurement Off
DESCRIPTION - Indicates the SET SCMEASURE OFF command turned off
subchannel measurements for the device.
MRIODMOF Control Block Contents
Offsets
Dec Hex Type Len Name (Dim) Description
0 0 Structure 68 IODMOF
0 0 Character 0 IODMOF_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 Unsigned 4 IODMOF_RDEVSID Host subchannel I.D. number
defined at initialization
24 18 Unsigned 2 IODMOF_RDEVDEV Device number
26 1A Unsigned 2 * Reserved and available for
IBM use
28 1C Unsigned 2 IODMOF_SCMSSCH Cumulative count of SSCHs and
RSCHs for this device. This
value may be wrapped when
format-1 measurement blocks are
being used (MTRSYS_CALFLG2 =
x'80').
30 1E Unsigned 2 IODMOF_SCMCOUNT Cumulative sample count.
Incremented whenever any
measurement fields are updated.
This value may be wrapped when
format-1 measurement blocks are
being used (MTRSYS_CALFLG2 =
x'80').
32 20 Unsigned 4 IODMOF_SCMCNTIM The time the device is
connected to the channel. This
is the sum of time intervals
measured whenever device is
logically connected to the
channel path for purposes of
transferring information
between it and the channel
subsystem.
36 24 Unsigned 4 IODMOF_SCMFPTIM The accumulated SSCH and RSCH
function pending time, the time
interval between acceptance of
the start function (or resume
function if the subchannel is
in the suspend state) at the
subchannel and acceptance of
the first command associated
with the initiation of
channel-program execution at
the device.
40 28 Unsigned 4 IODMOF_SCMDDTIM Device disconnect time. This
is the sum of the time
intervals measured whenever the
device is logically
disconnected from the channel
subsystem while the subchannel
is active
44 2C Unsigned 4 IODMOF_SCMCQTIM Control unit queueing time.
The sum of the time intervals
measured by the control unit
whenever the device is
logically disconnected from the
channel subsystem during an I/O
operation while the device is
busy with an operation from a
different system.
48 30 Unsigned 4 IODMOF_SCMDATIM Device-active-only-time. The
sum of the time intervals when
the subchannel is device-active
but not subchannel-active at
the end of an I/O operation or
chain of I/O operations
initiated by START SUBCHANNEL.
52 34 Unsigned 4 IODMOF_SCMDBTIM Device-Busy Time. The sum of
the time intervals when the
subchannel is busy during an
attempt to initiate a start
function or resume function at
the subchannel.
56 38 Unsigned 4 IODMOF_SCMIRTIM Initial-command-response
time. The
initial-command-response time
for a start or resume function
is the time interval beginning
from when the first command of
the channel program is sent to
the device until the device
indicates it has accepted the
command.
60 3C Unsigned 4 IODMOF_SCGSSCH Fullword cumulative count of
SSCHs and RSCHs for this
device. Available when format-1
measurement blocks are being
used (MTRSYS_CALFLG2 = x'80').
64 40 Unsigned 4 IODMOF_SCGCOUNT Fullword cumulative sample
count incremented whenever any
measurement fields are updated.
Available when format-1
measurement blocks are being
used (MTRSYS_CALFLG2 = x'80').
68 44 Character 0 IODMOF_END
MRIODMOF Cross Reference
Hex Hex
Name Offset Length Value
IODMOF 0 68
IODMOF_END 44 0
IODMOF_MRHDR 0 0
IODMOF_RDEVDEV 18 2
IODMOF_RDEVSID 14 4
IODMOF_SCGCOUNT 40 4
IODMOF_SCGSSCH 3C 4
IODMOF_SCMCNTIM 20 4
IODMOF_SCMCOUNT 1E 2
IODMOF_SCMCQTIM 2C 4
IODMOF_SCMDATIM 30 4
IODMOF_SCMDBTIM 34 4
IODMOF_SCMDDTIM 28 4
IODMOF_SCMFPTIM 24 4
IODMOF_SCMIRTIM 38 4
IODMOF_SCMSSCH 1C 2
MRHDR 0 20
MRHDR_END 14 0
MRHDRDM 4 1
MRHDRLEN 0 2
MRHDRRC 6 2
MRHDRTOD 8 8
MRHDRZER 2 2
This information is
based on z/VM V5R3.0.
Last updated on 12 Jun 2007 at 12:35:23.
Copyright IBM Corporation, 1990, 2007