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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29/*
30 * ASSERTION:
31 *   Positive test for ring buffer policy.
32 *
33 * SECTION: Buffers and Buffering/ring Policy;
34 *	Buffers and Buffering/Buffer Sizes;
35 *	Options and Tunables/bufsize;
36 *	Options and Tunables/bufpolicy;
37 *	Options and Tunables/switchrate
38 */
39
40/*
41 * We assume that a trace() of an integer stores at least 8 bytes.  If ring
42 * buffering is not working properly, this trace() will induce a drop, and the
43 * counter won't be incremented.  We set the switchrate to one second just to
44 * sure that a high switchrate doesn't mask broken ring buffers.
45 */
46#pragma D option bufpolicy=ring
47#pragma D option bufsize=50
48#pragma D option switchrate=1sec
49
50int n;
51int i;
52
53tick-10msec
54/n < 300/
55{
56	trace(i);
57	i++;
58}
59
60tick-10msec
61/n < 300/
62{
63	n++;
64}
65
66tick-10msec
67/n == 300/
68{
69	exit(2);
70}
71
72END
73{
74	exit(i == 300 ? 0 : 1);
75}
76