#!/usr/sbin/dtrace -s
 /*
  * dispqlen.d - dispatcher queue length by CPU.
  *              Written using DTrace (Solaris 10 3/05).
  *
  * $Id: dispqlen.d 3 2007-08-01 10:50:08Z brendan $
  *
  * USAGE:	dispqlen.d		# hit Ctrl-C to end sample
  *
  * NOTES: The dispatcher queue length is an indication of CPU saturation.
  * It is not an indicatior of utilisation - the CPUs may or may not be
  * utilised when the dispatcher queue reports a length of zero.
  *
  * SEE ALSO:    uptime(1M)
  *
  * COPYRIGHT: Copyright (c) 2005 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
  *
  * 27-Jun-2005  Brendan Gregg   Created this.
  * 14-Feb-2006	   "      "	Last update.
  */
 
 #pragma D option quiet
 
 dtrace:::BEGIN
 {
 	printf("Sampling... Hit Ctrl-C to end.\n");
 }
 
 profile:::profile-1000hz
 {
 	@queue[cpu] =
 	    lquantize(curthread->t_cpu->cpu_disp->disp_nrunnable, 0, 64, 1);
 }
 
 dtrace:::END
 {
 	printa(" CPU %d%@d\n", @queue);
 }