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    76  IODMOF                 
   0   0  Character     0  IODMOF_MRHDR           Record header. See MRRECHDR
                                                  for details.
   0   0  Character    20  MRHDR                  
   0   0  Unsigned      2  MRHDRLEN               
   2   2  Unsigned      2  MRHDRZER               
   4   4  Unsigned      1  MRHDRDM                
   5   5  Unsigned      1  *                      
   6   6  Unsigned      2  MRHDRRC                
   8   8  Character     8  MRHDRTOD               
  16  10  Character     4  *                      
  20  14  Character     0  MRHDR_END              
  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  Unsigned      4  IODMOF_SCMIDTIM        Interrupt-Delay time. The
                                                  sum of the time intervals
                                                  from when a subchannel is
                                                  made status pending with
                                                  primary status to when the
                                                  status is cleared by TSCH.
  72  48  Unsigned      4  IODMOF_SCMPDTIM        I/O-Priority-Delay time.
                                                  The sum of the portion of
                                                  queue time that can be
                                                  attributed to delay due to
                                                  I/O priority management
                                                  performed by the control
                                                  unit. Applicable only to TCW
                                                  I/O operations.
  76  4C  Character     0  IODMOF_END             

MRIODMOF Cross Reference

                      Hex           Hex
Name                  Offset Length Value 
 
IODMOF                     0     76
IODMOF_END                4C      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_SCMIDTIM           44      4
IODMOF_SCMIRTIM           38      4
IODMOF_SCMPDTIM           48      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 V6R4.0.

Last updated on 5 Oct 2016 at 13:59:17.
Copyright IBM Corporation, 1990, 2016