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Prolog 
Control Block Contents 
   SCMBK DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  SCMBK Prolog Top of page
  
 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.
 RELOCATION CONSIDERATIONS : None
 
 
  SCMBK Control Block Content Top of page
  




 SCMBK DSECT
Top of page


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 Top of page
  
          
*** 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 Top of page
  
 
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 7.3.0 Last updated on 22 Jun 2022 at 15:54:47 EDT.
Copyright IBM Corporation, 1990, 2022