SCMBK Back to Index page
 
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