| |
Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure SMTBK SMT RELATED DATA AREAS
START OF MULTITHREADING CONFIGURATION DATA.
Multithreading(MT) facility related fields.
0000 0 Bitstring 1 SMTMTRSM MT not enabled reason mask
1... .... SMTMTNTI X'80' SMTMTNTI MT facility is not
installed
.1.. .... SMTMT390 X'40' SMTMT390 ESA/390 or GENERAL
LPAR mode
..1. .... SMTMTLCP X'20' SMTMTLCP LINUX only LPAR
with CP processors
...1 .... SMTMTCRF X'10' SMTMTCRF Missing
corequisite facilities
.... 1... SMTMTRBL X'08' SMTMTRBL SRM statement
specified rebalance
.... .1.. SMTMTHOR X'04' SMTMTHOR Horizontal
polarization
.... ..1. SMTMTHIG X'02' SMTMTHIG IPL CPU addr is
too high
.... ...1 SMTMTSFA X'01' SMTMTSFA SIGP failure. See
SMTMTFRS.
0001 1 Bitstring 1 * Reserved
0002 2 Bitstring 1 SMTMTCFM Missing MT corequisite facility
mask
1... .... SMTMTRF1 X'80' SMTMTRF1 Facility 1
required by MT missing
.1.. .... SMTMTCSV X'40' SMTMTCSV No MT counter sets
support
..1. .... SMTSCCMV X'20' SMTSCCMV
Store-CPU-counter-multiple
facility is not available.
0003 3 Bitstring 1 SMTMTPMT Multithreading program-specified
maximum thread ID
0004 4 Bitstring 1 * RESERVED
0005 5 Bitstring 1 SMTMTFRS SIGP set-multithreading order
failure reason code
0006 6 Signed 2 * Reserved
0008 8 Signed 4 SMTMTFST Detailed failure status when
SMTMTFRS=1
000C 12 Signed 4 SMTSMTSQ Multithreading config change
Sequence number. Odd when a SET
MT command is in progress and
even otherwise. When 0, the
multithreading config has not
been modified by SET MT. Updates
are serialized by CS.
SMTSMTLK held exclusive serializes updates to all fields
following the lock up to the end of the SMTSMTLK serialized
data section and must be held continuously until all
processing associated with changes to activated thread
counts have completed. Self-consistent reads are guaranteed
by holding SMTSMTLK shared. Processing of the MULTITHREADING
statement during initialization occurs while the system is
running uniprocessor so use of SMTSMTLK can be skipped then.
Processor configuration changes needed because of changes
to the Activated thread counts require the Vary Proc lock
exclusive obtained while continuously holding the SMT
Configuration lock exclusive. Therefore the RCCACMNT array
is serialized by SMT Configuration Lock plus Vary Proc Lock.
A consequence of an SMT configuration change is
that the number of activated threads per core may
change. Therefore functions that alter the processor
configuration such as VARY CORE require protection
against changes to the activated thread count while it
makes the processor configuration change. Because VARY
CORE operates on a single core, the Vary Processor Lock
is sufficient protection because the change of the
activated thread count resulting from an SMT configura-
tion change is done while holding both the SMT config-
uration lock and the Vary Proc Lock. However, functions
like hiperdispatch that make decisions for an entire
CPU type require at least a share of SMT Configuration
Lock as protection. In some cases it may be sufficient
to use a continuous hold of the Vary Proc Lock if the
only portion of the SMT configuration data that is used
is serialized by both locks. Hiperdispatch functions
that do not hold the Vary Proc Lock continuously use
the SMT Configuration Lock over the entire transition
that requires protection from SMT configuration changes.
The SMT Configuration Lock is higher in the hierarchy
that the Vary Proc Lock.
0010 16 Dbl-Word 8 SMTSMTLK (3) SMT Configuration (defer) Lock.
Used to serialize the
multithreading configuration data
changed by SET MT command. If
both this lock and HCPRCCVA are
needed this lock must be acquired
first if deferring on the locks.
Otherwise make a conditional
request and back out if it isn't
acquired.
START OF SMTSMTLK SERIALIZED DATA SECTION.
0028 40 Signed 8 SMTSMTTM TOD value at completion of the
last successful multithreading
configuration change.
Mask of CPU Types supported in the MULTITHREADING
config statement.
00000000 SMTMTCTM PUMCP+PUMZIP+PUMIFL+PUMICF
Information from MultiThreading statement in config file.
If MAX is specified for any operand, the operand value
will be set to X'FF'
0030 48 Bitstring 1 SMTCOMXT Value specified on MAX_THREADS
0031 49 Bitstring 1 SMTCOALL Value specified on type ALL This
field is used only during
statement processing and has no
meaning during system operation
0032 50 Signed 2 * Reserved
0034 52 Signed 4 * Reserved for IBM use.
0038 56 Bitstring 1 SMTCOMNT (6) Array of values specified on
config statement per CPU type
0038 56 Bitstring 1 SMTCOCP Requested threads for CP cores
0039 57 Bitstring 1 * Reserved
003A 58 Bitstring 1 * Reserved
003B 59 Bitstring 1 SMTCOIFL Requested threads for IFL cores
003C 60 Bitstring 1 SMTCOICF Requested threads for ICF cores
003D 61 Bitstring 1 SMTCOZIP Requested threads for ZIIP cores
003E 62 Bitstring 1 * (2) Reserved
Max numbers of threads per CPU type supported by hardware
0040 64 Bitstring 1 SMTHWMNT (6) Maximum numbers of threads per
CPU type supported by hardware
0040 64 Bitstring 1 SMTHWCP Maximum threads for CP cores
0041 65 Bitstring 1 * Reserved
0042 66 Bitstring 1 * Reserved
0043 67 Bitstring 1 SMTHWIFL Maximum threads for IFL cores
0044 68 Bitstring 1 SMTHWICF Maximum threads for ICF cores
0045 69 Bitstring 1 SMTHWZIP Maximum threads for ZIIP cores
0046 70 Bitstring 1 * (2) Reserved
Max numbers of threads per CPU type supported by z/VM CP
0048 72 Bitstring 1 SMTSYMNT (6) Maximum numbers of threads per
CPU type supported by z/VM CP
0048 72 Address 1 SMTSYCP Maximum threads for CP cores
0049 73 Bitstring 1 * RESERVED
004A 74 Bitstring 1 * RESERVED
004B 75 Address 1 SMTSYIFL Maximum threads for IFL cores
004C 76 Address 1 SMTSYICF Maximum threads for ICF cores
004D 77 Address 1 SMTSYZIP Maximum threads for ZIIP cores
004E 78 Bitstring 1 * (2) Reserved
SET MULTITHREAD command information. The requested thread
count fields map 1:1 to the fields for the MULTITHREADING
system config file statement. The values are from the
most recent successful SET MT command. Additional fields
provide serialization and related information.
Parameters from most recent successful SET MT command.
If MAX is specified for any operand, the operand value
will be set to X'FF'. If ALL was not specified, any
unspecified CPU type will have a value of x'00'. All
values will be zero if INITIAL was specified.
SMTSMFLG is used to inform Monitor about the stage of
processing to report in MRPRCSMT (D5 R21).
0050 80 Bitstring 1 SMTSMALL Value specified on type ALL of
the most recent successful SET MT
command.
0051 81 Bitstring 1 SMTSMSET SET MT flags.
1... .... SMTSMINI X'80' SMTSMINI SET MT INITIAL
specified.
0052 82 Bitstring 1 SMTSMFLG Multithreading config change
flags. In MRPRCSMT (D5 R21) this
flag distinguishes between the
start and completion records.
00000080 SMTSMSTA X'80' SMTSMSTA Multithreading
config change processing has
started.
00000040 SMTSMFIN X'40' SMTSMFIN Multithreading
config change processing has
finished.
00000000 SMTSMINA X'00' SMTSMINA Multithreading
config change processing is not
active.
0053 83 Bitstring 1 * Reserved for IBM use.
0054 84 Signed 4 * Reserved for IBM use.
0058 88 Bitstring 1 SMTSMMNT (6) Array of values specified on SET
MT command per CPU type.
0058 88 Bitstring 1 SMTSMCP Specified threads for CP cores.
0059 89 Bitstring 1 * Reserved for IBM use.
005A 90 Bitstring 1 * Reserved for IBM use.
005B 91 Bitstring 1 SMTSMIFL Specified threads for IFL cores.
005C 92 Bitstring 1 SMTSMICF Specified threads for ICF cores.
005D 93 Bitstring 1 SMTSMZIP Specified threads for zIIP cores.
005E 94 Bitstring 1 * (2) Reserved for IBM use.
Resulting Requested Multithreading Configuration:
These values are the same as above, but with the zeros
replaced with the prior values because those CPU types are
unchanged.
0060 96 Bitstring 1 SMTCRMNT (6) Array of new multithreading
configuration values.
0060 96 Bitstring 1 SMTCRCP Requested threads for CP cores.
0061 97 Bitstring 1 * Reserved for IBM use.
0062 98 Bitstring 1 * Reserved for IBM use.
0063 99 Bitstring 1 SMTCRIFL Requested threads for IFL cores.
0064 100 Bitstring 1 SMTCRICF Requested threads for ICF cores.
0065 101 Bitstring 1 SMTCRZIP Requested threads for zIIP cores.
0066 102 Bitstring 1 * (2) Reserved for IBM use.
Per CPU Type activated thread count transition sequence
number. These values can be used to determine whether a
transition is active, as well as how many transitions
have occurred for each CPU type. The sequence number is
incremented only if the activated thread count changes.
When the sequence number is 0, there has not been a
change to the activated thread count for the CPU type
since IPL. If it is odd then a transition is active,
and if it is even and greater than 0 the value is
twice the number of transitions because the value is
incremented at the start and end of the transition.
0068 104 Signed 4 SMTATSEQ (6) Array of activated-thread-cnt
transition sequence numbers.
0068 104 Signed 4 SMTATSCP Sequence number for CP activated
thread count transitions.
006C 108 Signed 4 * Reserved for IBM use.
0070 112 Signed 4 * Reserved for IBM use.
0074 116 Signed 4 SMTATSIFL Sequence number for IFL activated
thread count transitions.
0078 120 Signed 4 SMTATSICF Sequence number for ICF activated
thread count transitions.
007C 124 Signed 4 SMTATSZIP Sequence number for zIIP
activated thread count
transitions.
0080 128 Signed 4 * (2) Reserved for IBM use.
.... ...1 SMTACDEF X'01' Default number of activated
threads per core
Per CPU Type activated processor masks are used only
during the activated thread count transitions. They are
used in the processing to define the desired end state.
These fields are kept for compatibility with ISV vendor
products. Their matching equivalent in HCPRCM should be
used instead.
0088 136 Dbl-Word 8 * (0) Align on DW boundary
0088 136 Bitstring 64 SMTACTMKS (6) Desired per CPU type activated
processor masks.
0088 136 Bitstring 64 SMTACTCP Activated CP processor mask.
00C8 200 Bitstring 1 * Reserved for IBM use.
0108 264 Bitstring 1 * Reserved for IBM use.
0148 328 Bitstring 64 SMTACTIF Activated IFL processor mask.
0188 392 Bitstring 64 SMTACTIC Activated ICF processor mask.
01C8 456 Bitstring 64 SMTACTZI Activated zIIP processor mask.
0208 520 Bitstring 1 * (128) Reserved for IBM use.
END OF SMTSMTLK SERIALIZED DATA SECTION.
END OF MULTITHREADING CONFIGURATION DATA.
00000300 SMTBSIZE (*-SMTBK+255)/256*256 consume a
full number of cache lines
| |