#!/usr/sbin/dtrace -s
 /*
  * runocc.d - run queue occupancy by CPU.
  *            Written using DTrace (Solaris 10 3/05).
  *
  * This prints the dispatcher run queue occupancy by CPU each second.
  * A consistant run queue occupancy is a sign of CPU saturation.
  *
  * The value is similar to that seen in "sar -q", however this is
  * calculated in a more accurate manner - sampling at 1000 Hertz.
  *
  * $Id: runocc.d 3 2007-08-01 10:50:08Z brendan $
  *
  * USAGE:	runocc.d
  *
  * FIELDS:
  *		CPU		cpu ID
  *		%runocc		% run queue occupancy, sampled at 1000 Hertz
  *
  * SEE ALSO: Solaris Internals 2nd Ed, vol 2, CPU chapter.
  *
  * COPYRIGHT: Copyright (c) 2006 Brendan Gregg.
  *
  * CDDL HEADER START
  *
  *  The contents of this file are subject to the terms of the
  *  Common Development and Distribution License, Version 1.0 only
  *  (the "License").  You may not use this file except in compliance
  *  with the License.
  *
  *  You can obtain a copy of the license at Docs/cddl1.txt
  *  or http://www.opensolaris.org/os/licensing.
  *  See the License for the specific language governing permissions
  *  and limitations under the License.
  *
  * CDDL HEADER END
  *
  * 02-Mar-2006  Brendan Gregg   Created this.
  * 24-Apr-2006	   "      "	Last update.
  */
 
 #pragma D option quiet
 
 profile-1000hz
 /curthread->t_cpu->cpu_disp->disp_nrunnable/
 {
 	@qocc[cpu] = count();
 }
 
 profile:::tick-1sec
 {
 	normalize(@qocc, 10);
 	printf("\n%8s %8s\n", "CPU", "%runocc");
 	printa("%8d %@8d\n", @qocc);
 	clear(@qocc);
 }