1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  *
26  * This D script is used as an example in the Solaris Dynamic Tracing Guide
27  * wiki in the "sched Provider" Chapter.
28  *
29  * The full text of the this chapter may be found here:
30  *
31  *   http://wikis.sun.com/display/DTrace/sched+Provider
32  *
33  * On machines that have DTrace installed, this script is available as
34  * whatfor.d in /usr/demo/dtrace, a directory that contains all D scripts
35  * used in the Solaris Dynamic Tracing Guide.  A table of the scripts and their
36  * corresponding chapters may be found here:
37  *
38  *   file:///usr/demo/dtrace/index.html
39  */
40 
41 sched:::off-cpu
42 /curlwpsinfo->pr_state == SSLEEP/
43 {
44 	/*
45 	 * We're sleeping.  Track our sobj type.
46 	 */
47 	self->sobj = curlwpsinfo->pr_stype;
48 	self->bedtime = timestamp;
49 }
50 
51 sched:::off-cpu
52 /curlwpsinfo->pr_state == SRUN/
53 {
54 	self->bedtime = timestamp;
55 }
56 
57 sched:::on-cpu
58 /self->bedtime && !self->sobj/
59 {
60 	@["preempted"] = quantize(timestamp - self->bedtime);
61 	self->bedtime = 0;
62 }
63 
64 sched:::on-cpu
65 /self->sobj/
66 {
67 	@[self->sobj == SOBJ_MUTEX ? "kernel-level lock" :
68 	    self->sobj == SOBJ_RWLOCK ? "rwlock" :
69 	    self->sobj == SOBJ_CV ? "condition variable" :
70 	    self->sobj == SOBJ_SEMA ? "semaphore" :
71 	    self->sobj == SOBJ_USER ? "user-level lock" :
72 	    self->sobj == SOBJ_USER_PI ? "user-level prio-inheriting lock" :
73 	    self->sobj == SOBJ_SHUTTLE ? "shuttle" : "unknown"] =
74 	    quantize(timestamp - self->bedtime);
75 
76 	self->sobj = 0;
77 	self->bedtime = 0;
78 }
79