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#!/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);
}
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