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 /* 28 * ASSERTION: 29 * Positive test for ring buffer policy. 30 * 31 * SECTION: Buffers and Buffering/ring Policy; 32 * Buffers and Buffering/Buffer Sizes; 33 * Options and Tunables/bufsize; 34 * Options and Tunables/bufpolicy; 35 * Options and Tunables/switchrate 36 */ 37 38 /* 39 * We assume that a trace() of an integer stores at least 8 bytes. If ring 40 * buffering is not working properly, this trace() will induce a drop, and the 41 * counter won't be incremented. We set the switchrate to one second just to 42 * sure that a high switchrate doesn't mask broken ring buffers. 43 */ 44 #pragma D option bufpolicy=ring 45 #pragma D option bufsize=50 46 #pragma D option switchrate=1sec 47 48 int n; 49 int i; 50 51 tick-10msec 52 /n < 300/ 53 { 54 trace(i); 55 i++; 56 } 57 58 tick-10msec 59 /n < 300/ 60 { 61 n++; 62 } 63 64 tick-10msec 65 /n == 300/ 66 { 67 exit(2); 68 } 69 70 END 71 { 72 exit(i == 300 ? 0 : 1); 73 } 74