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 - IODHPP FUNCTION - This record indicates the alias use statistics of a HyperPAV pool LOCATED BY - Through the Monitor Control Area REFERENCED CONTROL BLOCKS - MRRECHDR Monitor Record Header NAME - MRIODHPP DESCRIPTIVE NAME - Monitor Sample Record Domain 6 - I/O Domain Record 28 - HyperPAV Pool activity DESCRIPTION - Indicates the alias use statistics of a HyperPAV pool NOTES: The HyperPAV Pool Token is the Subsystem ID (SSID) of the logical control unit that all of the devices in the pool are associated. The SSID is a unique value that distinguishes it from all other control units in a configuration. This value can be obtained from a Q DASD DETAILS command executed against one of the device's on the control unit. The HyperPAV Pool number is a value that indicates which devices (bases/aliases) can be used together in a HyperPAV environment. This value is generated by CP using the SSID to ensure that it is unique value in the system. This value can be obtained from a Q PAV command executed against one of the devices in the pool.
MRIODHPP Control Block ContentsOffsets Dec Hex Type Len Name (Dim) Description 0 0 Structure 48 IODHPP Start of monitor record 0 0 Character 0 IODHPP_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 2 IODHPP_HPPOOLNM HyperPAV Pool Number 22 16 Unsigned 2 IODHPP_HPPTOKEN HyperPAV Pool Token = SSID 24 18 Unsigned 4 IODHPP_HPPNBASE Number of base devices in the HyperPAV pool. 28 1C Unsigned 4 IODHPP_HPPNALIS Number of alias devices in the HyperPAV pool. 32 20 Unsigned 4 IODHPP_HPPTRIES Number of times CP went to the HyperPAV pool's free queue to find an alias device 36 24 Unsigned 4 IODHPP_HPPFAILS Number of times CP went to the HyperPAV pool's free queue to find an alias device but couldn't find one to use 40 28 Unsigned 4 IODHPP_HPPMINCT Lowest number of alias devices in the HyperPAV pool's free queue since the last MRIODHPP record was cut. Note: A value of X'7FFFFFFF' means CP has not tried to get an alias from this pool since the last MRIODHPP record was cut. 44 2C Unsigned 4 IODHPP_HPPMAXCT Highest number of alias devices in the HyperPAV pool's free queue since the last MRIODHPP record was cut. Note: a value of X'FFFFFFFF' means CP has not tried to get an alias from this pool since the last MRIODHPP record was cut. 48 30 Character 0 IODHPP_END
MRIODHPP Cross ReferenceHex Hex Name Offset Length Value IODHPP 0 48 IODHPP_END 30 0 IODHPP_HPPFAILS 24 4 IODHPP_HPPMAXCT 2C 4 IODHPP_HPPMINCT 28 4 IODHPP_HPPNALIS 1C 4 IODHPP_HPPNBASE 18 4 IODHPP_HPPOOLNM 14 2 IODHPP_HPPTOKEN 16 2 IODHPP_HPPTRIES 20 4 IODHPP_MRHDR 0 0 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 V6R1.0.
Last updated on 8 Oct 2009 at 21:08:13.
Copyright IBM Corporation, 1990, 2009