|
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.
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.
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 1000 SSDTABLE TOTAL SIZE OF 5 COPIES OF SSDTB 03E8 1000 Bitstring 40 SSDREST SIZE OF DATA AREA AFTER TABLES 00000082 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 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). 00000084 SSDUSERC * START OF THE USER COUNTERS 0084 132 Signed 4 SSDDL TOTAL DLIST USER COUNT 0088 136 Signed 4 SSDD0 CLASS 0 DLIST USER COUNT 008C 140 Signed 4 SSDD1 CLASS 1 DLIST USER COUNT 0090 144 Signed 4 SSDD2 CLASS 2 DLIST USER COUNT 0094 148 Signed 4 SSDD3 CLASS 3 DLIST USER COUNT 0098 152 Signed 4 SSDLD0 CLASS 0 LOADING DLIST USER COUNT 009C 156 Signed 4 SSDLD1 CLASS 1 LOADING DLIST USER COUNT 00A0 160 Signed 4 SSDLD2 CLASS 2 LOADING DLIST USER COUNT 00A4 164 Signed 4 SSDLD3 CLASS 3 LOADING DLIST USER COUNT 00A8 168 Signed 4 SSDE0 CLASS 0 ELIST USER COUNT 00AC 172 Signed 4 SSDE1 CLASS 1 ELIST USER COUNT 00B0 176 Signed 4 SSDE2 CLASS 2 ELIST USER COUNT 00B4 180 Signed 4 SSDE3 CLASS 3 ELIST USER COUNT 00B8 184 Signed 4 SSDLE0 CLASS 0 LOADING ELIST USER COUNT 00BC 188 Signed 4 SSDLE1 CLASS 1 LOADING ELIST USER COUNT 00C0 192 Signed 4 SSDLE2 CLASS 2 LOADING ELIST USER COUNT 00C4 196 Signed 4 SSDLE3 CLASS 3 LOADING ELIST USER COUNT 00000044 SSDUSERL *-SSDUSERC LENGTH OF THE USER TABLE 000000C8 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. 03E8 1000 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. 0000040A SSDUSRBE * ENDING ADDRESS OF SSDUSERB
SSDBK Storage Layout
*** SSDBK - SYSTEM SMOOTHED DATA BLOCK
*
* +-------------------------------------------------------+
* 0 | |
* = SSDTABLE =
* | |
* +-------------------------------------------------------+
* 3E8 | |
* = SSDREST =
* | |
* +-------------------------------------------------------+
* 410
*
*** 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 | SSDDL |
* +---------------------------+---------------------------+
* 88 | SSDD0 | SSDD1 |
* +---------------------------+---------------------------+
* 90 | SSDD2 | SSDD3 |
* +---------------------------+---------------------------+
* 98 | SSDLD0 | SSDLD1 |
* +---------------------------+---------------------------+
* A0 | SSDLD2 | SSDLD3 |
* +---------------------------+---------------------------+
* A8 | SSDE0 | SSDE1 |
* +---------------------------+---------------------------+
* B0 | SSDE2 | SSDE3 |
* +---------------------------+---------------------------+
* B8 | SSDLE0 | SSDLE1 |
* +---------------------------+---------------------------+
* C0 | SSDLE2 | SSDLE3 |
* +---------------------------+---------------------------+
* C8
*
*** Overlay for SSDTABLE in SSDBK
*** Overlay for SSDREST in SSDBK
*
* +-------------------------------------------------------+
* 3E8 | |
* = SSDUSERB =
* | +-----------------------------------------+
* | | 40A
* +-------------+
*
*** Overlay for SSDREST in SSDBK
SSDBK Cross Reference
Symbol Dspl Value -------------- ---- ----- SSDAUPGR 003C SSDAUWSS 0038 SSDC1CUM 0028 SSDC1PGR 0030 SSDC1WSS 002C SSDDL 0084 SSDDORM 0078 SSDD0 0088 SSDD1 008C SSDD2 0090 SSDD3 0094 SSDELP 0008 SSDEXPF1 004C SSDEXPF2 0050 SSDEXPF3 0054 SSDE0 00A8 SSDE1 00AC SSDE2 00B0 SSDE3 00B4 SSDLD0 0098 SSDLD1 009C SSDLD2 00A0 SSDLD3 00A4 SSDLE0 00B8 SSDLE1 00BC SSDLE2 00C0 SSDLE3 00C4 SSDMDCIA 006C SSDMDCNA 0070 SSDMDCPR 0060 SSDMDCPW 0064 SSDPGIO 0024 SSDREST 03E8 SSDSIZE 03E8 00000082 SSDSRWP 0040 SSDSRWS 0044 SSDSTEAL 0048 SSDSTL 0010 SSDSTL2 0074 SSDTABLE 0000 SSDTB 0000 SSDTBL 00C4 000000C8 SSDTCDEL 007C SSDTCXDL 0080 SSDTRD 0018 SSDTRM 0014 SSDUSERB 03E8 SSDUSERC 0080 00000084 SSDUSERL 00C4 00000044 SSDUSRBE 03E8 0000040A SSDWSS 0020 SSDXMIG 005C SSDXMI2 0068 SSDXSTR 0058 SSDXSTUF 0034
Last updated on 5 Jun 2001 at 16:46:06 EDT.
Copyright IBM Corporation, 1990, 2001