Programming Interface Information:
The Monitor Records are intended Programming Interfaces that
allow the customer to write programs to obtain services of z/VM.

MRSCLSTP

Prolog
Control Block Contents
Storage Layout
Cross Reference

MRSCLSTP Prolog

 DSECT NAME - SCLSTP
 FUNCTION - Map a Monitor record.
 LOCATED BY -
           Through the Monitor Control Area
 REFERENCED CONTROL BLOCKS -
        MRRECHDR    Monitor Record Header
 NAME - MRSCLSTP
 DESCRIPTIVE NAME - Monitor Event Record
                    Domain 2 - Scheduler Domain
                    Record 8 - System Timer Pop
 DESCRIPTION - Record of changes to "smoothed" (i.e. averaged
               over time) scheduler data. Generated at every
               system-designated time interval. This data is
               critical to scheduling algorithms.
 NOTE : The time interval, designated by CP, is currently set at
        30 seconds but may be subject to change in the future.


MRSCLSTP Control Block Contents

Offsets
Dec Hex  Type       Len  Name (Dim)          Description
 
  0   0  Structure   80  SCLSTP              Start of monitor record
  0   0  Character    0  SCLSTP_MRHDR        Record header. See MRRECHDR for
                                             details.
  0   0  Character   20  MRHDR               
  0   0  Unsigned     2  MRHDRLEN            record length in bytes
  2   2  Unsigned     2  MRHDRZER            field of zeros
  4   4  Unsigned     1  MRHDRDM             domain identifier
  5   5  Unsigned     1  *                   
  6   6  Unsigned     2  MRHDRRC             record identifier
  8   8  Character    8  MRHDRTOD            Time at which this record was
                                             built. In time-of-day (TOD) clock
                                             format. See IBM System 370 XA
                                             Principle of Operation for
                                             explanation of format.
 16  10  Character    4  *                   
 20  14  Character    0  MRHDR_END           End of header
 20  14  Character    8  SCLSTP_SRMRSCTM     Reset interval size
 28  1C  Unsigned     2  SCLSTP_SYSPGRAT     Pages per second which are being
                                             read in by the system
 30  1E  Unsigned     2  *                   Reserved for IBM use
 32  20  Unsigned     4  SCLSTP_SRMSTEAL     Instantaneous value of the STEAL
                                             parameter reported on the INDICATE
                                             LOAD command
 36  24  Character    8  SCLSTP_SRMSTRD      Average time to read a page.
                                             Scheduler's estimate of how long
                                             it is taking users to receive a
                                             page once requested. Measured in
                                             elapsed time.
 44  2C  Unsigned     4  SCLSTP_SRM1AVWS     Average WSS of all E1 users at
                                             the end of their Q1 dispatch list
                                             stay. Used by the scheduler to
                                             assign a projected WSS to E1 users
                                             on entry to the eligible list for
                                             a new transaction.
 48  30  Unsigned     4  SCLSTP_SRM1AVPG     Average paging rate of all E1
                                             users at the end of their Q1
                                             dispatch list stay. Used by the
                                             scheduler to assign a projected
                                             paging rate to E1 users on entry
                                             to the eligible list for a new
                                             transaction
 52  34  Unsigned     4  SCLSTP_SRMSTSRW     System resource weight for
                                             storage. This is used by the
                                             scheduler to decide how much of a
                                             bottleneck the storage resources
                                             are.
 56  38  Unsigned     4  SCLSTP_SRMAPGDE     Average Paging rate of user in s
                                             dispatch and eligible lists
 60  3C  Unsigned     4  SCLSTP_SRMAWSDE     Average WSS of users in dispatch
                                             and eligible lists
 64  40  Unsigned     4  SCLSTP_SRMPGSRW     System resource weight for
                                             paging. Used by the scheduler to
                                             decide how much of a bottleneck
                                             the paging resources are.
 68  44  Unsigned     4  SCLSTP_SRMEPNF1     Expansion factor for all E1
                                             users. Represents the ratio of
                                             time it is taking for a short
                                             transaction to complete compared
                                             with the amount of time it would
                                             take if it were running alone on
                                             the system.
 72  48  Unsigned     4  SCLSTP_SRMEPNF2     Expansion time for all E2 users.
                                             Represents the ratio of time it is
                                             taking for a medium transaction to
                                             complete compared with the amount
                                             of time it would take if it were
                                             running alone on the system.
 76  4C  Unsigned     4  SCLSTP_SRMEPNF3     Expansion time for all E2 users.
                                             Represents the ratio of time it is
                                             taking for a long transaction to
                                             complete compared with the amount
                                             of time it would take if it were
                                             running alone on the system.
 80  50  Character    0  SCLSTP_END          

MRSCLSTP Cross Reference

                      Hex           Hex
Name                 Offset Length Value
 
MRHDR                   0     20
MRHDR_END              14      0
MRHDRDM                 4      1
MRHDRLEN                0      2
MRHDRRC                 6      2
MRHDRTOD                8      8
MRHDRZER                2      2
SCLSTP                  0     80
SCLSTP_END             50      0
SCLSTP_MRHDR            0      0
SCLSTP_SRMAPGDE        38      4
SCLSTP_SRMAWSDE        3C      4
SCLSTP_SRMEPNF1        44      4
SCLSTP_SRMEPNF2        48      4
SCLSTP_SRMEPNF3        4C      4
SCLSTP_SRMPGSRW        40      4
SCLSTP_SRMRSCTM        14      8
SCLSTP_SRMSTEAL        20      4
SCLSTP_SRMSTRD         24      8
SCLSTP_SRMSTSRW        34      4
SCLSTP_SRM1AVPG        30      4
SCLSTP_SRM1AVWS        2C      4
SCLSTP_SYSPGRAT        1C      2

This information is based on z/VM V4R3.0.
Last updated on 1 May 2002 at 16:20:33.
Copyright IBM Corporation, 1990, 2002