1#!/usr/sbin/dtrace -s
2/*
3 * priclass.d - priority distribution by scheduling class.
4 *              Written using DTrace (Solaris 10 3/05)
5 *
6 * This is a simple DTrace script that samples at 1000 Hz the current
7 * thread's scheduling class and priority. A distribution plot is printed.
8 *
9 * With priorities, the higher the priority the better chance the thread
10 * has of being scheduled.
11 *
12 * This idea came from the script /usr/demo/dtrace/pri.d, which
13 * produces similar output for priority changes, not samples.
14 *
15 * 22-Apr-2006, ver 1.00
16 *
17 * USAGE:       priclass.d      # hit Ctrl-C to end sampling
18 *
19 * FIELDS:
20 *              value           process priority
21 *              count           number of samples of at least this priority
22 *
23 * Also printed is the scheduling class,
24 *
25 *		TS		time sharing
26 *		IA		interactive
27 *		RT		real time
28 *		SYS		system
29 *		FSS		fair share schedular
30 *
31 * BASED ON: /usr/demo/dtrace/pri.d
32 *
33 * SEE ALSO: DTrace Guide "profile Provider" chapter (docs.sun.com)
34 *           dispadmin(1M)
35 *
36 * PORTIONS: Copyright (c) 2006 Brendan Gregg.
37 *
38 * CDDL HEADER START
39 *
40 *  The contents of this file are subject to the terms of the
41 *  Common Development and Distribution License, Version 1.0 only
42 *  (the "License").  You may not use this file except in compliance
43 *  with the License.
44 *
45 *  You can obtain a copy of the license at Docs/cddl1.txt
46 *  or http://www.opensolaris.org/os/licensing.
47 *  See the License for the specific language governing permissions
48 *  and limitations under the License.
49 *
50 * CDDL HEADER END
51 *
52 * 12-Feb-2006   Brendan Gregg   Created this.
53 */
54
55#pragma D option quiet
56
57dtrace:::BEGIN
58{
59	printf("Sampling... Hit Ctrl-C to end.\n");
60}
61
62profile:::profile-1000hz
63{
64	@count[stringof(curlwpsinfo->pr_clname)]
65	    = lquantize(curlwpsinfo->pr_pri, 0, 100, 5);
66}
67