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Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
SALBK
Control Block Contents
SALBK DSECT
Cross Reference (Contains links to field and bit definitions)
SALBK Prolog
NAME : HCPSALBK
DESCRIPTION: Slot Allocation Data Block
DSECT : SALBK
FUNCTION : Maps the data in the slot allocation data areas
in HCPPGD for paging (HCPPGDPG) and spooling
(HCPPGDSP).
LOCATED BY : The data areas mapped by this block,
HCPPGDPG (paging data) and HCPPGDSP (spooling
data), are in nucleus-resident areas.
CREATED BY : The data areas mapped by this block are created
at system generation.
DELETED BY : The data areas mapped by this block are
never deleted.
SERIALIZED : SALLOCK
RELOCATION CONSIDERATIONS : None
COMMENTS : None
SALBK Control Block Content
SALBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure SALBK Slot Allocation Data Block 0000 0 Dbl-Word 8 SALLOCK (6) Allocation lockword 0030 48 Bitstring 12 SALALPTR Pointers to control blocks for volume from which slots are currently being allocated 003C 60 Signed 4 * Reserved for IBM use 0040 64 Signed 4 SALLIST CPVOL ANCHOR 0044 68 Signed 4 SALSLTAV Total slots available - includes slots on DRAINing volumes 0048 72 Signed 4 SALSLTIU Number of slots in use - includes slots on DRAINing volumes 004C 76 Signed 4 SALSLT9A Total slots available, as used for 90% full calculations - does not include slots on DRAINing volumes 0050 80 Signed 4 SALSLT9I Number of slots in use, as used for 90% full calculations - does not include slots on DRAINing volumes 0054 84 Signed 4 SALDMPAV Total dump slots available on special DUMP ONLY volume (used in spool SALBK only) 0058 88 Signed 4 SALDMPIU Total dump slots in use on special DUMP ONLY volume (used in spool SALBK only) 005C 92 Signed 4 SALFLG90 90% full reset flag 0060 96 Signed 4 SALSLT90 90% of slots available 0064 100 Signed 4 SAL90FUL Number of times paging or spooling slots were 90% full. 0068 104 Address 4 SALOFFST Offset to CPVOL chain for this allocation type in CPVLIST 006C 108 Bitstring 1 SALPARM HCPPGT / HCPPGU parameter Allowed SALPARM values: PGTPAGE: paging SALBK PGTSPOOL: spooling SALBK 00000001 PGTPAGE X'01' PGTPAGE DASD slot required for paging Notes : PGTPAGE == PGUPAGE == ALOCPAGE == CPVTEMPP (Enforced via CKMAINT in HCPALOC, HCPCPVOL) 00000002 PGTSPOOL X'02' PGTSPOOL DASD slot required for spooling Notes : PGTSPOOL == PGUSPOOL == ALOCSPOL == CPVTEMPS (Enforced via CKMAINT in HCPALOC, HCPCPVOL) 00000004 PGTALLOC X'04' PGTALLOC Allocate slots in MSABK 00000008 PGTREG X'08' PGTREG Return ASA in a register 00000010 PGTASA X'10' PGTASA Input in form ASA, not EXTBK slot num 00000020 PGTALTAS X'20' PGTALTAS REQUEST APPLIES TO ALT ASCBK ASCBK address is passed to HCPPGT in R10 00000040 PGTSYS X'40' PGTSYS CALL APPLIES TO SYSTEM SPACE 00000080 PGTNOUPD X'80' PGTNOUPD ASCBK's ASCCTPGS count has alread been updated 00000002 PGUSPOOL X'02' PGUSPOOL DASD slot required for spooling Notes : PGUSPOOL == PGTSPOOL == ALOCSPOL == CPVTEMPS (Enforced via CKMAINT in HCPALOC, HCPCPVOL) 00000001 PGUPAGE X'01' PGUPAGE DASD slot required for paging Notes : PGUPAGE == PGTPAGE == ALOCPAGE == CPVTEMPP (Enforced via CKMAINT in HCPALOC, HCPCPVOL) Notes : PGTPAGE == PGUPAGE == ALOCPAGE == CPVTEMPP (enforced in HCPALOC, HCPCPVOL) PGTSPOOL == PGUSPOOL == ALOCSPOL == CPVTEMPS (enforced in HCPALOC, HCPCPVOL) 006D 109 Bitstring 1 SALALCST Work area: number of paging slots allocated on the current volume during one invocation of HCPPGT. 006E 110 Signed 2 SALTOTEX Total number of paging read exposures currently attached to the system 0070 112 Signed 4 SALOTHER Address of the other slot type. 0074 116 Signed 4 SALMAXPR Theoretical maximum paging rate for the system, including all volumes currently attached (used for paging slots only) 0078 120 Signed 4 SALTOTML Total MLOAD for this space type. 007C 124 Signed 4 SALAVGML Average MLOAD for this space type. 0080 128 Bitstring 1 SALGDFRG Size of useful fragment. Used when allocating part of CASBK to determine if the remainder of the fragment is large enough to bother keeping. 0081 129 Bitstring 1 SALCASMN Minimum CASBK size for this allocation type (crumb size) 0082 130 Signed 2 * Reserved for IBM use 0084 132 Signed 4 SALEXTPF Percentage of slots that must be available in an EXTBK for it to be chosen as the current allocation volume. 0088 136 Signed 4 * (36) Reserved for IBM use. 0030 48 Signed 8 SALCPVX (0) Current CPVOL/VEXBK addresses 0030 48 Signed 4 SALCPVOL Pointer to CPVOL address for current allocation volume 0034 52 Signed 4 SALVEXBK Pointer to VEXBK address for current allocation volume 0038 56 Signed 4 SALEXTBK Pointer to EXTBK address for current allocation extent 0000000C SALAPLEN *-SALCPVX Length of allocation pointers
SALBK Storage Layout
*** SALBK - Slot Allocation Data Block
*
* +-------------------------------------------------------+
* 0 | |
* = SALLOCK =
* | |
* +-------------------------------------------------------+
* 30 | SALALPTR |
* | +---------------------------+
* 38 | |///////////////////////////|
* +---------------------------+---------------------------+
* 40 | SALLIST | SALSLTAV |
* +---------------------------+---------------------------+
* 48 | SALSLTIU | SALSLT9A |
* +---------------------------+---------------------------+
* 50 | SALSLT9I | SALDMPAV |
* +---------------------------+---------------------------+
* 58 | SALDMPIU | SALFLG90 |
* +---------------------------+---------------------------+
* 60 | SALSLT90 | SAL90FUL |
* +---------------------------+------+------+-------------+
* 68 | SALOFFST |:PARM |:ALCST| SALTOTEX |
* +---------------------------+------+------+-------------+
* 70 | SALOTHER | SALMAXPR |
* +---------------------------+---------------------------+
* 78 | SALTOTML | SALAVGML |
* +------+------+-------------+---------------------------+
* 80 |:GDFRG|:CASMN|/////////////| SALEXTPF |
* +------+------+-------------+---------------------------+
* 88 |///////////////////////////////////////////////////////|
* =///////////////////////////////////////////////////////=
* |///////////////////////////////////////////////////////|
* +-------------------------------------------------------+
* 118
*
*** SALBK - Slot Allocation Data Block
*** Overlay for SALALPTR in SALBK
*
* +---------------------------+---------------------------+
* 30 | SALCPVOL | SALVEXBK |
* +---------------------------+---------------------------+
* 38 | SALEXTBK | 3C
* +---------------------------+
*
*** Overlay for SALALPTR in SALBK
SALBK Cross Reference
Symbol Dspl Value -------------- ---- ----- PGTALLOC 006C 00000004 PGTALTAS 006C 00000020 PGTASA 006C 00000010 PGTNOUPD 006C 00000080 PGTPAGE 006C 00000001 PGTREG 006C 00000008 PGTSPOOL 006C 00000002 PGTSYS 006C 00000040 PGUPAGE 006C 00000001 PGUSPOOL 006C 00000002 SALALCST 006D SALALPTR 0030 SALAPLEN 0038 0000000C SALAVGML 007C SALCASMN 0081 SALCPVOL 0030 SALCPVX 0030 SALDMPAV 0054 SALDMPIU 0058 SALEXTBK 0038 SALEXTPF 0084 SALFLG90 005C SALGDFRG 0080 SALLIST 0040 SALLOCK 0000 SALMAXPR 0074 SALOFFST 0068 SALOTHER 0070 SALPARM 006C SALSLTAV 0044 SALSLTIU 0048 SALSLT9A 004C SALSLT9I 0050 SALSLT90 0060 SALTOTEX 006E SALTOTML 0078 SALVEXBK 0034 SAL90FUL 0064
Copyright IBM Corporation, 1990, 2011