FCX265, Spin Lock Log Screen – LOCKLOG

Performance Toolkit Subcommand: LOCKLOG.

The Spin Lock Log Screen (FCX265) shows spin lock information by time.
Figure 1. Layout of Spin Lock Log Screen (FCX265)
  FCX265      CPU 2817  SER 36D85  Interval 00:00:30 - 07:33:30    Perf. Monitor

                       <--------------------- Spin Lock Collision Activity --------------------------->
                       <----- Combined -------->  <------ Exclusive ------>  <-------- Shared --------> 
  Interval             Colls AvgSpin  Spin  CADs  Colls AvgSpin  Spin  CADs   Colls AvgSpin  Spin  CADs
  End Time LockName     /sec    usec %Busy  /sec   /sec    usec %Busy  /sec    /sec    usec %Busy  /sec
  >>Mean>> RCCSFQL        .0    .000  .000    .0     .0    .000  .000    .0      .0    .000  .000    .0
  >>Mean>> RSANOQLK       .0    .000  .000    .0     .0    .000  .000    .0      .0    .000  .000    .0
  >>Mean>> NSUNLSLK       .0    .000  .000    .0     .0    .000  .000    .0      .0    .000  .000    .0
  >>Mean>> HCPPGDML       .0    .000  .000    .0     .0    .000  .000    .0      .0    .000  .000    .0
  >>Mean>> NSUIMGLK       .0    .000  .000    .0     .0    .000  .000    .0      .0    .000  .000    .0
  >>Mean>> FSDVMLK        .0    .000  .000    .0     .0    .000  .000    .0      .0    .000  .000    .0
  >>Mean>> DCTLLOK        .0    .000  .000    .0     .0    .000  .000    .0      .0    .000  .000    .0
  >>Mean>> SYSDATLK       .0    .000  .000    .0     .0    .000  .000    .0      .0    .000  .000    .0
  >>Mean>> RSACALLK       .1    .249  .000    .1     .1    .249  .000    .0      .0    .000  .000    .0
  >>Mean>> RSAAVLLK       .0    .000  .000    .0     .0    .000  .000    .0      .0    .000  .000    .0
  >>Mean>> HCPPGDAL       .0    .000  .000    .0     .0    .000  .000    .0      .0    .000  .000    .0
  >>Mean>> HCPPGDTL       .0    .000  .000    .0     .0    .000  .000    .0      .0    .000  .000    .0 
  >>Mean>> >>Total>       .1    .249  .000    .1     .1    .249  .000    .0      .0    .000  .000    .0

  Command ===> _
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Field Descriptions:
Interval End Time
The end time of the monitor interval or the BYTIME interval for which the values were calculated. In the case of the >>Mean>> entry, you can find the relevant interval in the header line.
Lock Name
The name of the CP spin lock.
Combined Colls/sec
The total exclusive and shared spin lock collisions per second.
Combined AvgSpin usec
The total average microseconds spent spinning on both exclusive and shared spin lock collisions.
Combined Spin %Busy
The percentage of total elapsed time spent in both exclusive and shared spin lock collisions.
Combined CADs/sec
Total number of CAD (Compare and Delay facility) instructions executed when attempting to obtain the lock in shared and exclusive mode, per second.

When running Performance Toolkit against z/VM 6.2 or earlier data, you will see dashes in this field.

When running Performance Toolkit against data from z/VM 6.3 without APAR VM65586 installed, this column contains .0 values.

Exclusive Colls/sec
The total exclusive spin lock collisions per second.
Exclusive AvgSpin usec
The average total microseconds spent spinning on exclusive spin lock collisions.
Exclusive Spin %Busy
The percentage of total elapsed time spent in exclusive spin lock collisions.
Exclusive CADs/sec
Total number of CAD (Compare and Delay facility) instructions executed when attempting to obtain the lock in exclusive mode, per second.

When running Performance Toolkit against z/VM 6.2 or earlier data, you will see dashes in this field.

When running Performance Toolkit against z/VM 6.3 data without APAR VM65586 installed, this column contains .0 values.

Shared Colls/sec
The total shared spin lock collisions per second.
Shared AvgSpin usec
The average total microseconds spent spinning on shared spin lock collisions.
Shared Spin %Busy
The percentage of total elapsed time spent in shared spin lock collisions.
Shared CADs/sec
Total number of CAD (Compare and Delay facility) instructions executed when attempting to obtain the lock in shared mode, per second.

When running Performance Toolkit against z/VM 6.2 or earlier data, you will see dashes in this field.

When running Performance Toolkit against z/VM 6.3 data without APAR VM65586 installed, this column contains .0 values.

Effect of AVERAGE and INTERIM subcommands:

None.