MRMTRTOP

MRMTRTOP Prolog

 DSECT NAME - MTRTOP
 FUNCTION - Map a Monitor record.
 LOCATED BY -
        Through the Monitor Control Area
 REFERENCED CONTROL BLOCKS -
        MRRECHDR    Monitor Record Header
 NAME - MRMTRTOP
 DESCRIPTIVE NAME - Monitor Configuration Record
                    Domain  1 - Monitor Domain
                    Record 26 - System Topology
 DESCRIPTION - Provides System Topology counts and
               STSI 15.1.x output.
 NOTES -
     1. The system topology monitor records are identical
        and need to stay that way. The identical records
        are MRPRCTOP (D5R14) and MRMTRTOP (D1R26).
     2. For additional information about the format and meaning
        of fields defined in this record (especially the
        MTRTOP_STSI field), refer to the following books:
          - Principles of Operation for the layout of the
            variable length STSI 15.1.x output which is
            documented in Chapter 10 under "STORE SYSTEM
            INFORMATION".  Anyone looking at the STSI data
            in this record should read about the format of
            the data and the CPU Topology Overview contained
            there. (SA22-7832-08)

MRMTRTOP Control Block Contents

Offsets
Dec  Hex  Type        Len  Name (Dim)             Description
 
   0   0  Structure    36  MTRTOP                 Start of monitor record
   0   0  Character     0  MTRTOP_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      2  MTRTOP_STSIOFF         Offset to STSI 15.1.x
                                                  output
  22  16  Unsigned      2  MTRTOP_STSILEN         Length of STSI 15.1.x
                                                  output in this monitor record
  24  18  Bitstring     1  MTRTOP_PCCMNEST        Maximum MNest value from
                                                  the RSCP Information response
  25  19  Bitstring     1  MTRTOP_RCCMNEST        The selector 2 (x) value
                                                  used by CP on STSI 15.1.x to
                                                  obtain CPU topology
                                                  information.
  26  1A  Unsigned      2  *                      Reserved for IBM Use
  28  1C  Unsigned      4  MTRTOP_RCCTOPPL        Cumulative number of times
                                                  CP checked for system
                                                  topology changes via PTF FC
                                                  2.
  32  20  Unsigned      4  MTRTOP_RCCTOPCH        Cumulative number of times
                                                  CP updated the system
                                                  topology because it changed
                                                  (ie: the PTF FC 2 returned
                                                  CC=1).
  36  24  Character     0  MTRTOP_STSI            STSI 15.1.x output. This
                                                  section is variable length.
                                                  MTRTOP_STSIOFF and
                                                  MTRTOP_STSILEN should always
                                                  be used to determine the byte
                                                  offset of this field in the
                                                  record and the byte length of
                                                  this field.

MRMTRTOP Cross Reference

                      Hex           Hex
Name                  Offset Length Value
 
MRHDR                      0     20
MRHDR_END                 14      0
MRHDRDM                    4      1
MRHDRLEN                   0      2
MRHDRRC                    6      2
MRHDRTOD                   8      8
MRHDRZER                   2      2
MTRTOP                     0     36
MTRTOP_MRHDR               0      0
MTRTOP_PCCMNEST           18      1
MTRTOP_RCCMNEST           19      1
MTRTOP_RCCTOPCH           20      4
MTRTOP_RCCTOPPL           1C      4
MTRTOP_STSI               24      0
MTRTOP_STSILEN            16      2
MTRTOP_STSIOFF            14      2

This information is
based on z/VM V7R1.0.

Last updated on 11 Sept 2018 at 16:06:14.

Copyright IBM Corporation, 1990, 2018