Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### SCMBK

Prolog

Control Block Contents
SCMBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### SCMBK Prolog

     NAME       : HCPSCMBK
     DESCRIPTION: SUBCHANNEL MEASUREMENT BLOCK
     DSECT      : SCMBK
     FUNCTION   : THE MEASUREMENT BLOCK IS AN ARCHITECTUALLY DEFINED
                  32 BYTE AREA THAT CONTAINS THE ACCUMULATED VALUES
                  OF THE MEASURED PARAMETERS FOR EACH SUBCHANNEL.
     LOCATED BY : HCPRIOSM IS THE ANCHOR FIELD FOR THE SUBCHANNEL
                  MEASUREMENT BLOCKS (MEASUREMENT BLOCK ORIGIN ADDRESS)
             HCPRIOSM ---> |-----|
                           |     | MEASUREMENT BLOCK 0000
                           |-----|
                           |     | MEASUREMENT BLOCK 0001
                           |-----|
                           |     | MEASUREMENT BLOCK 0002
                           |-----|
                              .
                  RDEVMBLK  FIELD OF RDEVBK - MEASUREMENT BLK ADDRESS
     CREATED BY : SCMBK'S ARE STATIC AND CREATED BY THE SYSGEN
                  PROCESS.
     DELETED BY : SCMBK'S ARE PART OF THE SYSTEM NUCLEUS AND NEVER
                  DELETED.

#### SCMBK Control Block Content

#### SCMBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      SCMBK          SUBCHANNEL MEASUREMENT BLOCK
    0000    0 Signed       2 SCMSSCH        CYCLIC COUNT OF SSCH AND RSCH
    0002    2 Signed       2 SCMCOUNT       SAMPLE COUNT
    0004    4 Signed       4 SCMCNTIM       DEVICE-CONNECT TIME
    0008    8 Signed       4 SCMFPTIM       FUNCTION-PENDING TIME
    000C   12 Signed       4 SCMDDTIM       DEVICE-DISCONNECT TIME
    0010   16 Signed       4 SCMCQTIM       CONTROL UNIT QUEUEING TIME
    0014   20 Signed       4 SCMDATIM       Device-Active-Only-Time
    0018   24 Signed       4 SCMDBTIM       Device-Busy Time
    001C   28 Signed       4 SCMIRTIM       Initial-Command-Response Time
              00000020       SCMSIZEB       (*-SCMBK) LENGTH OF SCMBK IN
                                            BYTES
              00000004       SCMSIZE        (*-SCMBK+7)/8 LENGTH OF SCMBK IN
                                            DOUBLE-WORDS

#### SCMBK Storage Layout

    *** SCMBK - SUBCHANNEL MEASUREMENT BLOCK
    *
    *     +-------------+-------------+---------------------------+
    *   0 |  SCMSSCH    |  SCMCOUNT   |         SCMCNTIM          |
    *     +-------------+-------------+---------------------------+
    *   8 |         SCMFPTIM          |         SCMDDTIM          |
    *     +---------------------------+---------------------------+
    *  10 |         SCMCQTIM          |         SCMDATIM          |
    *     +---------------------------+---------------------------+
    *  18 |         SCMDBTIM          |         SCMIRTIM          |
    *     +---------------------------+---------------------------+
    *  20
    *
    *** SCMBK - SUBCHANNEL MEASUREMENT BLOCK

#### SCMBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    SCMCNTIM       0004
    SCMCOUNT       0002
    SCMCQTIM       0010
    SCMDATIM       0014
    SCMDBTIM       0018
    SCMDDTIM       000C
    SCMFPTIM       0008
    SCMIRTIM       001C
    SCMSIZE        001C 00000004
    SCMSIZEB       001C 00000020
    SCMSSCH        0000

This information is based on z/VM V6R1.0. Last updated on 18 Feb 2010 at 09:03:21 EDT.
Copyright IBM Corporation, 1990, 2008