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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
Storage Layout
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 52 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
30 1E Unsigned 2 IODMOF_SCMCOUNT Cumulative sample count.
Incremented whenever any
measurement fields are updated.
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 Character 0 IODMOF_END
MRIODMOF Cross Reference
Hex Hex
Name Offset Length Value
IODMOF 0 52
IODMOF_END 34 0
IODMOF_MRHDR 0 0
IODMOF_RDEVDEV 18 2
IODMOF_RDEVSID 14 4
IODMOF_SCMCNTIM 20 4
IODMOF_SCMCOUNT 1E 2
IODMOF_SCMCQTIM 2C 4
IODMOF_SCMDATIM 30 4
IODMOF_SCMDDTIM 28 4
IODMOF_SCMFPTIM 24 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 V4R3.0.
Last updated on 1 May 2002 at 16:20:33.
Copyright IBM Corporation, 1990, 2002