#!/usr/sbin/dtrace -s
/*
* priclass.d - priority distribution by scheduling class.
* Written using DTrace (Solaris 10 3/05)
*
* 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.
*
* 22-Apr-2006, ver 1.00
*
* USAGE: priclass.d # hit Ctrl-C to end sampling
*
* FIELDS:
* value process priority
* count number of samples of at least this priority
*
* Also printed is the scheduling class,
*
* TS time sharing
* IA interactive
* RT real time
* SYS system
* FSS fair share schedular
*
* BASED ON: /usr/demo/dtrace/pri.d
*
* SEE ALSO: DTrace Guide "profile Provider" chapter (docs.sun.com)
* dispadmin(1M)
*
* PORTIONS: 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
*
* 12-Feb-2006 Brendan Gregg Created this.
*/
#pragma D option quiet
dtrace:::BEGIN
{
printf("Sampling... Hit Ctrl-C to end.\n");
}
profile:::profile-1000hz
{
@count[stringof(curlwpsinfo->pr_clname)]
= lquantize(curlwpsinfo->pr_pri, 0, 100, 5);
}