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priclass.d(1m)                                  USER COMMANDS                                 priclass.d(1m)



NAME
       priclass.d - priority distribution by scheduling class. Uses DTrace.

SYNOPSIS
       priclass.d

DESCRIPTION
       This is a simple DTrace script that samples at 1000 Hz the current thread's scheduling class and pri-ority. priority.
       ority. A distribution plot is printed.

       With priorities, the higher the priority the better chance the thread has of being scheduled.

       This idea came from the script /usr/demo/dtrace/pri.d, which produces  similar  output  for  priority
       changes, not samples.

       Since  this  uses  DTrace,  only the root user or users with the dtrace_kernel privilege can run this
       command.

EXAMPLES
       This samples until Ctrl-C is hit.
              # priclass.d


FIELDS
       value  process priority

       count  number of samples of at least this priority


SCHEDULING CLASSES
       TS     time sharing

       IA     interactive

       RT     real time

       SYS    system

       FSS    fair share scheduler


BASED ON
       /usr/demo/dtrace/pri.d


DOCUMENTATION
       DTrace Guide "profile Provider" chapter (docs.sun.com)

       See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs  may
       include full worked examples with verbose descriptions explaining the output.

EXIT
       priclass.d will sample until Ctrl-C is hit.

SEE ALSO
       pridist.d(1M), dispadmin(1M), dtrace(1M)




version 1.00                                    Apr 22, 2006                                  priclass.d(1m)