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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. |
MRIODTON
PrologControl Block Contents
Cross Reference
MRIODTON Prolog
DSECT NAME - IODTON
FUNCTION - Map a Monitor record.
LOCATED BY -
Through the Monitor Control Area
REFERENCED CONTROL BLOCKS -
MRRECHDR Monitor Record Header
NAME - MRIODTON
DESCRIPTIVE NAME - Monitor Event Record
Domain 6 - I/O Domain
Record 18 - Set Throttle Rate
DESCRIPTION - Indicates that a throttle rate has been set
for a device.
MRIODTON Control Block Contents
Offsets
Dec Hex Type Len Name (Dim) Description
0 0 Structure 40 IODTON Start of monitor record
0 0 Character 0 IODTON_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 IODTON_RDEVSID Host subchannel I.D. number
defined at initialization
24 18 Unsigned 2 IODTON_RDEVDEV Device number
26 1A Unsigned 2 * Reserved and available for
IBM use
28 1C Unsigned 4 IODTON_THRDLYS Cumulative count of I/O
requests that were delayed.
This count may be non-zero if
we are changing the rate of a
device that is already in the
throttle set.
32 20 Character 8 IODTON_THRIORTE I/O rate expressed as the TOD
clock increment between I/O
operations.
40 28 Character 0 IODTON_END
MRIODTON Cross Reference
Hex Hex
Name Offset Length Value
IODTON 0 40
IODTON_END 28 0
IODTON_MRHDR 0 0
IODTON_RDEVDEV 18 2
IODTON_RDEVSID 14 4
IODTON_THRDLYS 1C 4
IODTON_THRIORTE 20 8
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 V5R4.0.
Last updated on 20 Mar 2013 at 14:39:41.
Copyright IBM Corporation, 1990, 2013