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

MRSYTSCG

Prolog
Control Block Contents
Cross Reference

MRSYTSCG Prolog

 DSECT NAME - SYTSCG
 FUNCTION - Map a Monitor record.
 LOCATED BY -
        Through the Monitor Control Area
 REFERENCED CONTROL BLOCKS -
        MRRECHDR    Monitor Record Header
 NAME - MRSYTSCG
 DESCRIPTIVE NAME - Monitor Sample Record
                    Domain 0  - System Domain
                    Record 10 - Scheduler Activity (global)
 DESCRIPTION - Provides information concerning scheduling
               of work in the system to aid an installation
               in the use of tuning commands. This information
               should be used with record MRSYTSCP (Domain 0,
               Record 13) for a complete picture of scheduling
               in the system.


MRSYTSCG Control Block Contents

Offsets
Dec Hex  Type       Len  Name (Dim)          Description
 
  0   0  Structure  140  SYTSCG              start of monitor record
  0   0  Character    0  SYTSCG_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  Unsigned     2  SYTSCG_SRMCDISP     Cardinal count of users in the
                                             dispatch list.
 22  16  Unsigned     2  SYTSCG_SRMCDLDG     Cardinal count of all 'loading'
                                             users in the dispatch list.
 24  18  Unsigned     2  SYTSCG_SRMC1DSP     Cardinal count of short, medium,
                                             and long running users in the
                                             dispatch list.
 26  1A  Unsigned     2  SYTSCG_SRMC2DSP     Cardinal count of medium and
                                             long running users in the dispatch
                                             list. This includes all Q2 and Q3
                                             users, but does not include Q1 or
                                             Q0 users.
 28  1C  Unsigned     2  SYTSCG_SRMC3DSP     Cardinal count of long running
                                             users in the dispatch list. This
                                             includes all Q3 users. It does not
                                             include Q0, Q1, or Q2 users.
 30  1E  Unsigned     2  SYTSCG_SRMC1ELG     Cardinal count of short, medium,
                                             and long running users in the
                                             eligible list. This includes all
                                             E1, E2, and E3 users. It includes
                                             no E0 users.
 32  20  Unsigned     2  SYTSCG_SRMC2ELG     Cardinal count of medium and
                                             long running users in the eligible
                                             list. This includes all E2 and E3
                                             users. It includes no E0 or E1
                                             users.
 34  22  Unsigned     2  SYTSCG_SRMC3ELG     Cardinal count of long-running
                                             users in the eligible list. This
                                             includes all E3 users. It includes
                                             no E0, E1, or E2 users.
 36  24  Unsigned     2  SYTSCG_SRMC1DLD     Cardinal count of all 'loading
                                             users' in Q1, Q2, and Q3.
 38  26  Unsigned     2  SYTSCG_SRMC2DLD     Cardinal count of all 'loading
                                             users' in Q2 and Q3.
 40  28  Unsigned     2  SYTSCG_SRMC3DLD     Cardinal count of all 'loading
                                             users' in Q3.
 42  2A  Unsigned     2  SYTSCG_SRMC1ELD     Cardinal count of all 'loading
                                             users' in E1, E2, and E3.
 44  2C  Unsigned     2  SYTSCG_SRMC2ELD     Cardinal count of all 'loading
                                             users' in E2 and E3.
 46  2E  Unsigned     2  SYTSCG_SRMC3ELD     Cardinal count of all 'loading
                                             users' in E3.
 48  30  Character    8  SYTSCG_SRME1ETS     Amount of time, in TOD clock
                                             units, of a Q1 user's elapsed time
                                             slice. The elapsed time slice is
                                             the wall clock time this user will
                                             be allowed to remain in the
                                             dispatch list at one time. This
                                             time will change as the load on
                                             the system changes.
 56  38  Unsigned     2  SYTSCG_SRME2ETF     The elapsed time slice factor
                                             for Q2. To obtain the elapsed time
                                             slice for a Q2 user, multiply this
                                             value by the Q1 elapsed time
                                             slice. This time will change as
                                             the load on the system changes.
 58  3A  Unsigned     2  SYTSCG_SRME3ETF     The elapsed time slice factor
                                             for Q3. To obtain the elapsed time
                                             slice for a Q3 user, multiply this
                                             value by the Q1 elapsed time
                                             slice. This time will change as
                                             the load on the system changes.
 60  3C  Signed       4  SYTSCG_SRMABSDL     Cardinal count of total absolute
                                             shares of all VMDBKs in the
                                             dispatch list. Unit of value is a
                                             hexadecimal factor scaled 16 bits.
                                             For example, X'00010000' =
                                             1.00(100%), X'0000C000' =
                                             0.75(75%), X'00008000' =
                                             0.50(50%), etc. Set to zero if
                                             user is a RELATIVE share user.
 64  40  Signed       4  SYTSCG_SRMRELDL     Cardinal count of total relative
                                             shares of all VMDBKs in the
                                             dispatch list.
 68  44  Unsigned     4  SYTSCG_SRMTOTST     Total storage to consider when
                                             selecting VMDBKs for the dispatch
                                             list.
 72  48  Unsigned     4  SYTSCG_SRMWSSDL     Sum of Working Set Sizes for all
                                             users (Q0...Q3) currently in the
                                             dispatch list.
 76  4C  Unsigned     4  SYTSCG_SRMWSSD1     Sum of WSS's for all Q1, Q2, and
                                             Q3 users currently in the dispatch
                                             list.
 80  50  Unsigned     4  SYTSCG_SRMWSSD2     Sum of WSS's for all Q2 and Q3
                                             users currently in the dispatch
                                             list.
 84  54  Unsigned     4  SYTSCG_SRMWSSD3     Sum of WSS's for all Q3 users
                                             currently in the dispatch list.
 88  58  Unsigned     4  SYTSCG_SRMLLCNT     Count of adds to the limit-list.
                                             This count does not include adds
                                             resulting from virtual-MP priority
                                             drop.
 92  5C  Unsigned     4  SYTSCG_SRMCONLL     Count of users actually ON the
                                             Limit List.
 96  60  Character    8  SYTSCG_SRMATOD      Artificial TOD. This TOD only
                                             advances at the rate the system is
                                             running user work.
104  68  Character    8  SYTSCG_SRMATOD2     Artificial TOD2. This TOD only
                                             advances with each CPU's user time
                                             and each CPU's wait time.
112  70  Unsigned     4  SYTSCG_SRMWTCPU     Mask of CPUs in wait state.
116  74  Unsigned     4  SYTSCG_CALSLKCT     Count of formal spin requests
                                             for the scheduler lock. This field
                                             is part of the SRMSLOCK
                                             synchronization lock control block
                                             (SYNCOUNT).
120  78  Character    8  SYTSCG_CALSLKTM     Elapsed spin time on the
                                             scheduler lock starting at zero
                                             and counting up when formally
                                             spinning on lock. Value is in TOD
                                             units. This field is part of the
                                             SRMSLOCK synchronization lock
                                             control block (SYNTIME).
128  80  Unsigned     4  SYTSCG_CALTLKCT     Count of formal spin requests
                                             for the TRQBK queue lock. This
                                             field is part of the HCPTRQLK
                                             synchronization lock control block
                                             (SYNCOUNT). In z/VM 4.3.0 and
                                             earlier the serialization for this
                                             function was done using the
                                             scheduler lock so the count in
                                             this field would have been
                                             included in the scheduler lock
                                             field called SYTSCG_CALSLKCT.
132  84  Character    8  SYTSCG_CALTLKTM     Elapsed spin time on the TRQBK
                                             queue lock starting at zero and
                                             counting up when formally spinning
                                             on lock. Value is in TOD units.
                                             This field is part of the HCPTRQLK
                                             synchronization lock control block
                                             (SYNTIME). In z/VM 4.3.0 and
                                             earlier the serialization for this
                                             function was done using the
                                             scheduler lock so the spin time in
                                             this field would have been
                                             included in the scheduler lock
                                             field called SYTSCG_CALSLKTM.
140  8C  Character    0  SYTSCG_END          

MRSYTSCG 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
SYTSCG                  0    140
SYTSCG_CALSLKCT        74      4
SYTSCG_CALSLKTM        78      8
SYTSCG_CALTLKCT        80      4
SYTSCG_CALTLKTM        84      8
SYTSCG_END             8C      0
SYTSCG_MRHDR            0      0
SYTSCG_SRMABSDL        3C      4
SYTSCG_SRMATOD         60      8
SYTSCG_SRMATOD2        68      8
SYTSCG_SRMCDISP        14      2
SYTSCG_SRMCDLDG        16      2
SYTSCG_SRMCONLL        5C      4
SYTSCG_SRMC1DLD        24      2
SYTSCG_SRMC1DSP        18      2
SYTSCG_SRMC1ELD        2A      2
SYTSCG_SRMC1ELG        1E      2
SYTSCG_SRMC2DLD        26      2
SYTSCG_SRMC2DSP        1A      2
SYTSCG_SRMC2ELD        2C      2
SYTSCG_SRMC2ELG        20      2
SYTSCG_SRMC3DLD        28      2
SYTSCG_SRMC3DSP        1C      2
SYTSCG_SRMC3ELD        2E      2
SYTSCG_SRMC3ELG        22      2
SYTSCG_SRME1ETS        30      8
SYTSCG_SRME2ETF        38      2
SYTSCG_SRME3ETF        3A      2
SYTSCG_SRMLLCNT        58      4
SYTSCG_SRMRELDL        40      4
SYTSCG_SRMTOTST        44      4
SYTSCG_SRMWSSDL        48      4
SYTSCG_SRMWSSD1        4C      4
SYTSCG_SRMWSSD2        50      4
SYTSCG_SRMWSSD3        54      4
SYTSCG_SRMWTCPU        70      4

This information is based on z/VM V4R4.0.
Last updated on 22 Jul 2003 at 15:04:23.
Copyright IBM Corporation, 1990, 2003