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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 priority. 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 users with root privileges	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 direc‐
       tory. The DTraceToolkit docs may include full worked examples with ver‐
       bose 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)

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