HSHAV

Prolog  

Control Block Contents  
   HSHAV DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

HSHAV Prolog

 NAME       : HCPHSHAV
 DESCRIPTION: Minidisk Cache Collision Node Available
              List Block
 DSECT      : HSHAV
 FUNCTION   : Contains collision nodes used to manage hash
              table collisions in the full track cache
              hash table.
 LOCATED BY : TCMAVLST (first CNODE).
              TCMAVPAG anchors pages linked by HSHAVNPG
 CREATED BY : HCPFTHIN (first block) and HCPFTHRD (subsequent)
 DELETED BY : HCPFTHFL (flush cache)
 COMMENTS   : This block is used to manage hash table
              available collision nodes.  It keeps a pointer
              to the next block containing collision nodes,
              and a pointer to the first collision node in
              the page that is available for use.  Collision
              nodes that are available are linked together in
              a singly linked list.

HSHAV Control Block Content

HSHAV DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      HSHAV          Minidisk Cache Collision Node
                                        Available
0000    0 Signed       4 HSHAVNPG       Pointer to the next HSHAV page
                                        containing collision nodes.
0004    4 Signed       4 *              Reserved for IBM use
0008    8 Character   16 HSHAVNOD (254) Collision nodes
          000000FE       HSHAVNTS       254 Count of entries
          000001FD       HSHAVLEN       (*-HSHAV+7)/8 Size in double
                                        words

HSHAV Storage Layout

          
*** HSHAV - Minidisk Cache Collision Node Available
*
*     +---------------------------+---------------------------+
*   0 |         HSHAVNPG          |///////////////////////////|
*     +---------------------------+---------------------------+
*   8 |                                                       |
*     =                       HSHAVNOD                        =
*     |                                                       |
*     +-------------------------------------------------------+
* FE8
*
*** HSHAV - Minidisk Cache Collision Node Available

HSHAV Cross Reference

Symbol         Dspl Value
-------------- ---- -----
HSHAVLEN       0008 000001FD
HSHAVNOD       0008
HSHAVNPG       0000
HSHAVNTS       0008 000000FE