SCGBK

Prolog  

Control Block Contents  
   SCGBK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

SCGBK Prolog

 NAME       : HCPSCGBK
 DESCRIPTION: 64 byte Subchannel Measurement Block
 DSECT      : SCGBK
 FUNCTION   : The measurement block is an architectually defined
              64 byte area that contains the accumulated values
              of the measured parameters for each subchannel.
 LOCATED BY : RDEVMBLK field of RDEVBK - logical address of
              measurement block
 CREATED BY : HCPCHMGS when subchannel measuring is turned on for a device
 DELETED BY : HCPCHMRS when subchannel measuring is turned off for a device
 COMPATIBILITY AND MIGRATION CONCERNS : HCPSCGBK describes the 64 byte subchannel measurement block.
              HCPSCMBK describes the 32 byte subchannel measurement block.
              When changing this control block, check if HCPSCMBK also
              requires changes.
 RELOCATION CONSIDERATIONS : None
 NOTES      : ABNORMAL coded because the block is updated by
              hardware asynchronously.  The PL/X compiler may not
              make any assumptions during optimization about the
              data contained in this block.

SCGBK Control Block Content

SCGBK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      SCGBK          64 byte Subchannel Measurement Block
0000    0 Signed       4 SCGSSCH        Cyclic Count of SSCH and RSCH
0004    4 Signed       4 SCGCOUNT       Sample Count
0008    8 Signed       4 SCGCNTIM       Device-Connect Time
000C   12 Signed       4 SCGFPTIM       Function-Pending Time
0010   16 Signed       4 SCGDDTIM       Device-Disconnect Time
0014   20 Signed       4 SCGCQTIM       Control-Unit-Queuing Time
0018   24 Signed       4 SCGDATIM       Device-Active-Only Time
001C   28 Signed       4 SCGDBTIM       Device-Busy Time
0020   32 Signed       4 SCGIRTIM       Initial-Command-Response Time
0024   36 Signed       4 * (7)          Reserved for future h/w use
          00000040       SCGSIZEB       (*-SCGBK) Length of SCGBK in
                                        bytes
          00000008       SCGSIZE        (*-SCGBK+7)/8 Length of SCGBK in
                                        double words

SCGBK Storage Layout

          
*** SCGBK - 64 byte Subchannel Measurement Block
*
*     +---------------------------+---------------------------+
*   0 |         SCGSSCH           |         SCGCOUNT          |
*     +---------------------------+---------------------------+
*   8 |         SCGCNTIM          |         SCGFPTIM          |
*     +---------------------------+---------------------------+
*  10 |         SCGDDTIM          |         SCGCQTIM          |
*     +---------------------------+---------------------------+
*  18 |         SCGDATIM          |         SCGDBTIM          |
*     +---------------------------+---------------------------+
*  20 |         SCGIRTIM          |///////////////////////////|
*     +---------------------------+///////////////////////////|
*  28 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  40
*
*** SCGBK - 64 byte Subchannel Measurement Block

SCGBK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
SCGCNTIM       0008
SCGCOUNT       0004
SCGCQTIM       0014
SCGDATIM       0018
SCGDBTIM       001C
SCGDDTIM       0010
SCGFPTIM       000C
SCGIRTIM       0020
SCGSIZE        0024 00000008
SCGSIZEB       0024 00000040
SCGSSCH        0000