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