Programming Interface Information:
The Monitor Records are intended Programming Interfaces that
allow the customer to write programs to obtain services of z/VM.

MRIODMOF

Prolog
Control 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 V5R1.0.
Last updated on 13 Sep 2004 at 11:25:22.
Copyright IBM Corporation, 1990, 2004