FCX332, SMT Metrics Per Core Log Screen – MTCORELG

Performance Toolkit Subcommand: MTCORELG.

The SMT Metrics Per Core Log Screen (FCX332) shows SMT data for each core.
Figure 1. Layout of SMT Metrics Per Core Log Screen (FCX332)

 FCX332      CPU nnnn  SER nnnnn  Interval HH:MM:SS - HH:MM:SS    Perf. Monitor

 Interval        Core    Threads             %Core   Avg. Thread
 End Time  Core  Type   per Core  PPD  Ent    Busy     Density
 >>Mean>>   00   CP         1     Vh   100     53.2      .50
 >>Mean>>   01   CP         1     Vh   100     40.6      .50
 >>Mean>>   02   CP         1     Vh   100     21.1      .50
 >>Mean>>   03   CP         1     Vh   100     11.7      .50
 >>Mean>>   04   CP         1     Vh   100      9.8      .50
 >>Mean>>   05   CP         1     Vh   100     12.2      .50
     .       .    .         .      .    .        .        .
     .       .    .         .      .    .        .        .
 >>Mean>>   1A   IFL        2     Vh   100     99.9     1.09
 >>Mean>>   1B   IFL        2     Vh   100     99.9     1.06
 >>Mean>>   1C   IFL        2     Vh   100     99.9      .95
 >>Mean>>   1D   IFL        2     Vh   100     99.9      .83
 >>Mean>>   1E   IFL        2     Vh   100     99.9     1.16
 >>Mean>>   1F   IFL        2     Vh   100     99.9     1.14

 03:32:23   00   CP         1     Vh   100     50.8     1.00
 03:32:23   01   CP         1     Vh   100     34.6     1.00
 03:32:23   02   CP         1     Vh   100     17.5     1.00
 03:32:23   03   CP         1     Vh   100     11.8     1.00
 03:32:23   04   CP         1     Vh   100     10.9     1.00
 03:32:23   05   CP         1     Vh   100     14.9     1.00
     .       .    .         .      .    .        .        .
     .       .    .         .      .    .        .        .
 03:32:23   1A   IFL        2     Vh   100     99.9     1.71
 03:32:23   1B   IFL        2     Vh   100     99.9     1.65
 03:32:23   1C   IFL        2     Vh   100     99.9     1.57
 03:32:23   1D   IFL        2     Vh   100     99.9     1.42
 03:32:23   1E   IFL        2     Vh   100    100.0     1.69
 03:32:23   1F   IFL        2     Vh   100     99.9     1.68

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The information shown is based on CP monitor MONITOR domain SAMPLE, SYSTEM domain CONFIGURATION, and PROCESSOR domain EVENT data.

The first entry is reserved for the overall averages since the last RESET subcommand or since data collection was activated. It is designated by the >>Mean>> string in the Interval End Time column.

Field Descriptions:
Interval End Time
The end time of the monitor interval for which the values were calculated. In the case of the >>Mean>> entry, you can find the relevant interval in the header line.
Core
The logical core ID in hexadecimal format.
Core Type
The core type of this logical core. Possible values are:
CP
Central Processor
ICF
Internal Coupling Facility
IFL
Integrated Facility for Linux
ZIIP
IBM Z Integrated Information Processor
Note: For the ZIIP cores, the monitor data shows IIP. Performance Toolkit translates this value as ZIIP.
Threads per Core
The number of activated threads on this core.

MIX is displayed on the >>Mean>> line if the number of activated threads changes during any of the sample intervals. This happens when the system is switched to MT-1 or MT-2.

PPD
The current polarization of the core. Possible values are:
Vh
Polarization is vertical, with high entitlement.
VhD
Polarization is vertical, with high entitlement, and the partition is a dedicated partition.
Vm
Polarization is vertical, with medium entitlement.
Vl
Polarization is vertical, with low entitlement.
MIX
A mixed polarization, which can be displayed:
  • On the >>Mean>> line if multiple distinct polarization values were encountered during the measured interval (average, from the last reset).
  • On an Interval End Time line if the polarization value for a core changes during the interval for which the data is displayed.
Ent
The average entitlement for the logical core as a percentage, where 100% represents one whole physical core's worth of processing capacity.
%Core Busy
The percentage of time the logical core was busy, defined as the percentage of elapsed time during which the logical core was assigned to a physical core. If the partition has been enabled for the wait-completion assist, this value includes wait time.
Avg. Thread Density
The average number of threads that were active on this core when at least one thread of this core was active.

Usage Note:

The SMT Metrics Per Core Log report is available only when multithreading is enabled:
  1. For the monitored system when monitoring live data
  2. On the system that generated a MONWRITE file that Performance Toolkit for z/VM is processing.

Effect of AVERAGE and INTERIM subcommands:

None.