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#!/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);
}
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