xref: /titanic_41/usr/src/cmd/dtrace/demo/sdt/interval.d (revision ea394cb00fd96864e34d2841b4a22357b621c78f)
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 
27 #pragma D option quiet
28 
29 sdt:::callout-start
30 {
31 	self->callout = ((callout_t *)arg0)->c_func;
32 }
33 
34 fbt::timeout:entry
35 /self->callout && arg2 <= 100/
36 {
37 	/*
38 	 * In this case, we are most interested in interval timeout(9F)s that
39 	 * are short.  We therefore do a linear quantization from 0 ticks to
40 	 * 100 ticks.  The system clock's frequency ? set by the variable
41 	 * "hz" ? defaults to 100, so 100 system clock ticks is one second.
42 	 */
43 	@callout[self->callout] = lquantize(arg2, 0, 100);
44 }
45 
46 sdt:::callout-end
47 {
48 	self->callout = NULL;
49 }
50 
51 END
52 {
53 	printa("%a\n%@d\n\n", @callout);
54 }
55