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Programming Interface Information:
The Monitor Records are intended Programming Interfaces that allow the customer to write programs to obtain services of z/VM. |
MRSYTLCK
PrologControl Block Contents
Cross Reference
MRSYTLCK Prolog
DSECT NAME - SYTLCK
FUNCTION - Map a Monitor record.
LOCATED BY -
Through the Monitor Control Area
REFERENCED CONTROL BLOCKS -
MRRECHDR Monitor Record Header
NAME - MRSYTLCK
DESCRIPTIVE NAME - Monitor Sample Record
Domain 0 - System Domain
Record 23 - Formal spin lock data
DESCRIPTION - Data saved in each formal lock area for the formal
spin locks in the system.
List of locks with data in this record:
Lock ID Lock Description
-------- ----------------
SRMSLOCK: scheduler lock
HCPTRQLK: TRQBK queue lock
SRMALOCK: adjunct list lock
HCPPGDPL: page allocation lock
HCPPGDSL: SPOOL allocation lock
HCPPGDTL: T-disk allocation lock
HCPPGDAL: CPVOL list lock
RSAAVLLK: <2G available list lock
RSACALLK: global cleared available list lock
SYSDATLK: SYSDATE/SYSTODMD lock
DCTLLOK: directory control lock
FSDVMLK: free storage lock
NSUIMGLK: IMG SNTBK lock
HCPPGDML: exposure MLOADs & system total MLOAD lock
NSUNLSLK: NLS SNTBK lock
RSANOQLK: no-owned resource queue lock
RCCSFQL: save frame queue lock
HCPRCCMA: switch master processor lock
RSASXQLK: SXSPM queue lock
HCPRCCSL: symbolic-lock list lock
RSA2GLCK: >2G available list lock
HCPTMFLK: HCPTIMER lock
BUTDLKEY: lock for HCPBUTDL
RSA2GCLK: >2G available contiguous list lock
RSAAVCLK: <2G available contiguous list lock
SRMATDLK: lock for updating SRMATOD and SRMATOD2
NOTES:
-- A single record is generated for the system at each monitor
sample interval.
MRSYTLCK Control Block Contents
Offsets
Dec Hex Type Len Name (Dim) Description
0 0 Structure 32 SYTLCK Start of monitor record
0 0 Character 0 SYTLCK_CALMRHDR 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
20 14 Unsigned 4 SYTLCK_CALNMLKS Number of spin locks in this
record. That is, the number of
SYTLCK_CALLKDATA entries
included after this header.
24 18 Unsigned 2 SYTLCK_CALENTSZ The size (in bytes) of each
SYTLCK_CALLKDATA entry
26 1A Unsigned 2 SYTLCK_CALENTDSP The displacement (in bytes)
from the beginning of this
record to the first
SYTLCK_CALLKDATA entry. The
entries are consecutive in
storage starting with the first
at this displacement.
28 1C Unsigned 4 * Reserved for future use
32 20 Character 0 SYTLCK_CALENTS Table of SYTLCK_CALLKDATA
entries, one for each formal
spin lock arranged one after
the other at the end of this
record. The SYTLCK_CALLCKID
field in each entry should be
used to determine which lock
the entry represents. See the
list of LOCKIDs above to
determine which ID represents
which lock.
Lock data for an individual formal spin lock. There is a separate entry
for each formal spin lock.
Offsets
Dec Hex Type Len Name (Dim) Description
0 0 Structure 32 SYTLCK_CALLKDATA Formal spin lock data entry
0 0 Character 8 SYTLCK_CALLCKID IDentifier for this lock
8 8 Unsigned 4 SYTLCK_CALXSCNT Total count of times this
lock has gone into the formal
spin routine when attempting to
get the lock in exclusive mode
12 C Character 8 SYTLCK_CALXTIME Total elapsed spin time on
this lock when attempting to
get it in exclusive mode,
starting at zero and counting
up
20 14 Unsigned 4 SYTLCK_CALSSCNT Total count of times this
lock has gone into the formal
spin routine when attempting to
get a share of the lock
24 18 Character 8 SYTLCK_CALSTIME Total elapsed spin time on
this lock when attempting to
get it in shared mode, starting
at zero and counting up
MRSYTLCK 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
SYTLCK 0 32
SYTLCK_CALENTDSP 1A 2
SYTLCK_CALENTS 20 0
SYTLCK_CALENTSZ 18 2
SYTLCK_CALLCKID 0 8
SYTLCK_CALLKDATA 0 32
SYTLCK_CALMRHDR 0 0
SYTLCK_CALNMLKS 14 4
SYTLCK_CALSSCNT 14 4
SYTLCK_CALSTIME 18 8
SYTLCK_CALXSCNT 8 4
SYTLCK_CALXTIME C 8
This information is
based on z/VM V5R3.0.
Last updated on 11 Jun 2007 at 16:03:23.
Copyright IBM Corporation, 2007