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Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
SSDBK
Control Block Contents
SSDBK DSECT
Cross Reference (Contains links to field and bit definitions)
SSDBK Prolog
NAME : HCPSSDBK
DESCRIPTION: SYSTEM SMOOTHED DATA BLOCK
DSECT : SSDBK
FUNCTION : MAPS PERMANENT FREE STORAGE WHICH CONTAINS
THE DATA HISTORY NEEDED FOR SMOOTHING OVER
TIME.
LOCATED BY : SRMSTPTB FIELD IN THE SRMBK
CREATED BY : HCPISR AT SYSTEM INITIALIZATION.
DELETED BY : NOT DELETED. PERMANENT FREE STORAGE.
RELOCATION CONSIDERATIONS : None
COMMENTS : - This control block is acquired by HCPISR at
system initialization for the exclusive use
of HCPSTP. Since HCPSTP is a single-threaded
system task, there are no serialization
requirements for the data.
- There are 6 areas of the SSDBK. The last is defined
by the ORG on SSDREST. The first 5 are all the same
size and are 1st defined by the ORG on SSDTABLE.
The corresponding areas are defined as follows. If
R1 points to an entry in the first area then:
0*SSDTBL(,R1) - Value from CP data accumulator
1*SSDTBL(,R1) - Contains new sample average
smoothed over DRATE.
2*SSDTBL(,R1) - Current delta value (observed) in
the CP data accumulator this time.
3*SSDTBL(,R1) - Previous delta value (observed)
in the CP data accumulator last
time. (ONLY CALCULATED FOR
SUBROUTINE SDATF. THIS VALUE IS
CALCULATED FOR DEBUGGING ONLY)
4*SSDTBL(,R1) - Contains new sample average
smoothed over HRATE.
- The following equats may be used to address the data.
- No offset is needed to access the
value from the CP accumulator.
- DRATEAVE = 1*SSDTBL
- CDELTA = 2*SSDTBL
- PDELTA = 3*SSDTBL
- HRATEAVE = 4*SSDTBL
SSDBK Control Block Content
SSDBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure SSDBK SYSTEM SMOOTHED DATA BLOCK 0000 0 Bitstring 2200 SSDTABLE Total size of 5 copies of SSDTB 0898 2200 Bitstring 40 SSDREST SIZE OF DATA AREA AFTER TABLES 00000118 SSDSIZE (*-SSDBK+7)/8 DOUBLEWORD SIZE OF SSDBK 0000 0 Dbl-Word 8 SSDTB TABLE START; X'FF'S EYECATCHER 0008 8 Dbl-Word 8 SSDELP ELAPSED TIME 0010 16 Signed 4 SSDSTL STEAL PAGES INCREMENT 0014 20 Signed 4 SSDTRM DENOMINATOR TERM FOR STEAL CALC. 0018 24 Dbl-Word 8 SSDTRD TIME A USER TAKES TO READ A PAGE 0020 32 Signed 4 SSDWSS PROJECTED WSS 0024 36 Signed 4 SSDPGIO DASD PAGE I/O OPERATIONS 0028 40 Signed 4 SSDC1CUM ACCUMULATED CLASS 1 USERS 002C 44 Signed 4 SSDC1WSS ACCUMULATED CLASS 1 WSS 0030 48 Signed 4 SSDC1PGR ACCUMULATED CLASS 1 PAGING RATE 0034 52 Signed 4 SSDXSTUF XSTORE info for average age 0038 56 Signed 4 SSDAUWSS AVERAGE USER'S WSS 003C 60 Signed 4 SSDAUPGR AVERAGE USER'S PAGING RATE 0040 64 Signed 4 SSDSRWP SYSTEM RESOURCE WEIGHT FOR PAGING 0044 68 Signed 4 SSDSRWS SYSTEM RESOURCE WEIGHT " STORAGE 0048 72 Signed 4 SSDSTEAL SYSTEM WIDE STEAL VALUE 004C 76 Signed 4 SSDEXPF1 CLASS 1 EXPANSION FACTOR ACCUM 0050 80 Signed 4 SSDEXPF2 CLASS 2 EXPANSION FACTOR ACCUM 0054 84 Signed 4 SSDEXPF3 CLASS 3 EXPANSION FACTOR ACCUM 0058 88 Signed 4 SSDXSTR XSTORE PAGE RATE (PGIN + PGOUT) 005C 92 Signed 4 SSDXMIG XSTORE MIGRATE RATE 0060 96 Signed 4 SSDMDCPR MiniDisk Cache: XSTORE Reads 0064 100 Signed 4 SSDMDCPW MiniDisk Cache: XSTORE Writes 0068 104 Signed 4 SSDXMI2 XSTORE migrates for MDC adjusted every other STP intervl 006C 108 Signed 4 SSDMDCIA MiniDisk Cache: I/Os avoided 0070 112 Signed 4 SSDMDCNA MiniDisk Cache: I/Os not avoided 0074 116 Signed 4 SSDSTL2 Paging steal rates for MDC adjusted every other STP intervl 0078 120 Signed 4 SSDDORM COUNT OF DORMANT LIST USERS. 007C 124 Signed 4 SSDTCDEL Count of pages stolen from full track cache 0080 128 Signed 4 SSDTCXDL Count of XSTORE blocks deleted from full track cache 0084 132 Signed 4 SSDPGDBS (20) Array of blk sizes built by steal (HCPPGDBS) 00000014 SSDBSSZ (*-SSDPGDBS)/4 Size of SSDPGDBS array. 00D4 212 Signed 4 SSDPGDBM (20) Array of blk sizes built by migrate (HCPPGDBM) 00000014 SSDBMSZ (*-SSDPGDBM)/4 Size of SSDPGDBM array. 0124 292 Signed 4 SSDPGDBR (20) Array of blk sizes read (HCPPGDBR) 00000014 SSDBRSZ (*-SSDPGDBR)/4 Size of SSDPGDBR array. THE FOLLOWING TABLE HOLDS SMOOTHED LIST ACCUMULATORS FOR THE NUMBER OF USERS AND LOADING USERS IN THE DISPATCH AND ELIGIBLE LISTS. THE ORDER HERE IS CRITICAL AND SHOULD NOT BE CHANGED WITHOUT THOROUGH EXAMINATION OF HOW THEY ARE USED IN HCPSTPGS'S CODE (ORDER MATCHES WITH SRMUSERC IN SRMBK). 00000174 SSDUSERC * START OF THE USER COUNTERS 0174 372 Signed 4 SSDDL TOTAL DLIST USER COUNT 0178 376 Signed 4 SSDD0 CLASS 0 DLIST USER COUNT 017C 380 Signed 4 SSDD1 CLASS 1 DLIST USER COUNT 0180 384 Signed 4 SSDD2 CLASS 2 DLIST USER COUNT 0184 388 Signed 4 SSDD3 CLASS 3 DLIST USER COUNT 0188 392 Signed 4 SSDLD0 CLASS 0 LOADING DLIST USER COUNT 018C 396 Signed 4 SSDLD1 CLASS 1 LOADING DLIST USER COUNT 0190 400 Signed 4 SSDLD2 CLASS 2 LOADING DLIST USER COUNT 0194 404 Signed 4 SSDLD3 CLASS 3 LOADING DLIST USER COUNT 0198 408 Signed 4 SSDE0 CLASS 0 ELIST USER COUNT 019C 412 Signed 4 SSDE1 CLASS 1 ELIST USER COUNT 01A0 416 Signed 4 SSDE2 CLASS 2 ELIST USER COUNT 01A4 420 Signed 4 SSDE3 CLASS 3 ELIST USER COUNT 01A8 424 Signed 4 SSDLE0 CLASS 0 LOADING ELIST USER COUNT 01AC 428 Signed 4 SSDLE1 CLASS 1 LOADING ELIST USER COUNT 01B0 432 Signed 4 SSDLE2 CLASS 2 LOADING ELIST USER COUNT 01B4 436 Signed 4 SSDLE3 CLASS 3 LOADING ELIST USER COUNT 00000044 SSDUSERL *-SSDUSERC LENGTH OF THE USER TABLE 000001B8 SSDTBL *-SSDTB TABLE LENGTH IN BYTES NOTES : The following macro invocation causes an assemble NOTES : error (ARITHMETIC OVERFLOW) if the coded table size is NOTES : insufficient. 0898 2200 Bitstring 34 SSDUSERB STARTING ADDRESS OF A BUFFER CONTAINING CORRESPONDING HALFWORD FIELDS TO SSDUSERC'S FULLWORD FIELDS. IT IS USED TO HOLD THE DISPATCH AND ELIGIBLE LIST COUNTS TO BE SMOOTHED. 000008BA SSDUSRBE * ENDING ADDRESS OF SSDUSERB 000001B8 DRATEAVG 1*SSDTBL 00000370 CDELTA 2*SSDTBL 00000528 PDELTA 3*SSDTBL 000006E0 HRATEAVG 4*SSDTBL
SSDBK Storage Layout
*** SSDBK - SYSTEM SMOOTHED DATA BLOCK
*
* +-------------------------------------------------------+
* 0 | |
* = SSDTABLE =
* | |
* +-------------------------------------------------------+
* 898 | |
* = SSDREST =
* | |
* +-------------------------------------------------------+
* 8C0
*
*** SSDBK - SYSTEM SMOOTHED DATA BLOCK
*** Overlay for SSDTABLE in SSDBK
*
* +-------------------------------------------------------+
* 0 | SSDTB |
* +-------------------------------------------------------+
* 8 | SSDELP |
* +---------------------------+---------------------------+
* 10 | SSDSTL | SSDTRM |
* +---------------------------+---------------------------+
* 18 | SSDTRD |
* +---------------------------+---------------------------+
* 20 | SSDWSS | SSDPGIO |
* +---------------------------+---------------------------+
* 28 | SSDC1CUM | SSDC1WSS |
* +---------------------------+---------------------------+
* 30 | SSDC1PGR | SSDXSTUF |
* +---------------------------+---------------------------+
* 38 | SSDAUWSS | SSDAUPGR |
* +---------------------------+---------------------------+
* 40 | SSDSRWP | SSDSRWS |
* +---------------------------+---------------------------+
* 48 | SSDSTEAL | SSDEXPF1 |
* +---------------------------+---------------------------+
* 50 | SSDEXPF2 | SSDEXPF3 |
* +---------------------------+---------------------------+
* 58 | SSDXSTR | SSDXMIG |
* +---------------------------+---------------------------+
* 60 | SSDMDCPR | SSDMDCPW |
* +---------------------------+---------------------------+
* 68 | SSDXMI2 | SSDMDCIA |
* +---------------------------+---------------------------+
* 70 | SSDMDCNA | SSDSTL2 |
* +---------------------------+---------------------------+
* 78 | SSDDORM | SSDTCDEL |
* +---------------------------+---------------------------+
* 80 | SSDTCXDL | |
* +---------------------------+ |
* 88 | |
* = SSDPGDBS =
* | +---------------------------+
* | | |
* +---------------------------+ |
* D8 | |
* = SSDPGDBM =
* | +---------------------------+
* | | |
* +---------------------------+ |
* 128 | |
* = SSDPGDBR =
* | +---------------------------+
* 170 | | SSDDL |
* +---------------------------+---------------------------+
* 178 | SSDD0 | SSDD1 |
* +---------------------------+---------------------------+
* 180 | SSDD2 | SSDD3 |
* +---------------------------+---------------------------+
* 188 | SSDLD0 | SSDLD1 |
* +---------------------------+---------------------------+
* 190 | SSDLD2 | SSDLD3 |
* +---------------------------+---------------------------+
* 198 | SSDE0 | SSDE1 |
* +---------------------------+---------------------------+
* 1A0 | SSDE2 | SSDE3 |
* +---------------------------+---------------------------+
* 1A8 | SSDLE0 | SSDLE1 |
* +---------------------------+---------------------------+
* 1B0 | SSDLE2 | SSDLE3 |
* +---------------------------+---------------------------+
* 1B8
*
*** Overlay for SSDTABLE in SSDBK
*** Overlay for SSDREST in SSDBK
*
* +-------------------------------------------------------+
* 898 | |
* = SSDUSERB =
* | +-----------------------------------------+
* | | 8BA
* +-------------+
*
*** Overlay for SSDREST in SSDBK
SSDBK Cross Reference
Symbol Dspl Value -------------- ---- ----- CDELTA 0898 00000370 DRATEAVG 0898 000001B8 HRATEAVG 0898 000006E0 PDELTA 0898 00000528 SSDAUPGR 003C SSDAUWSS 0038 SSDBMSZ 00D4 00000014 SSDBRSZ 0124 00000014 SSDBSSZ 0084 00000014 SSDC1CUM 0028 SSDC1PGR 0030 SSDC1WSS 002C SSDDL 0174 SSDDORM 0078 SSDD0 0178 SSDD1 017C SSDD2 0180 SSDD3 0184 SSDELP 0008 SSDEXPF1 004C SSDEXPF2 0050 SSDEXPF3 0054 SSDE0 0198 SSDE1 019C SSDE2 01A0 SSDE3 01A4 SSDLD0 0188 SSDLD1 018C SSDLD2 0190 SSDLD3 0194 SSDLE0 01A8 SSDLE1 01AC SSDLE2 01B0 SSDLE3 01B4 SSDMDCIA 006C SSDMDCNA 0070 SSDMDCPR 0060 SSDMDCPW 0064 SSDPGDBM 00D4 SSDPGDBR 0124 SSDPGDBS 0084 SSDPGIO 0024 SSDREST 0898 SSDSIZE 0898 00000118 SSDSRWP 0040 SSDSRWS 0044 SSDSTEAL 0048 SSDSTL 0010 SSDSTL2 0074 SSDTABLE 0000 SSDTB 0000 SSDTBL 01B4 000001B8 SSDTCDEL 007C SSDTCXDL 0080 SSDTRD 0018 SSDTRM 0014 SSDUSERB 0898 SSDUSERC 0124 00000174 SSDUSERL 01B4 00000044 SSDUSRBE 0898 000008BA SSDWSS 0020 SSDXMIG 005C SSDXMI2 0068 SSDXSTR 0058 SSDXSTUF 0034
Copyright IBM Corporation, 1990, 2011