1*2633Sahl /* 2*2633Sahl * CDDL HEADER START 3*2633Sahl * 4*2633Sahl * The contents of this file are subject to the terms of the 5*2633Sahl * Common Development and Distribution License (the "License"). 6*2633Sahl * You may not use this file except in compliance with the License. 7*2633Sahl * 8*2633Sahl * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*2633Sahl * or http://www.opensolaris.org/os/licensing. 10*2633Sahl * See the License for the specific language governing permissions 11*2633Sahl * and limitations under the License. 12*2633Sahl * 13*2633Sahl * When distributing Covered Code, include this CDDL HEADER in each 14*2633Sahl * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*2633Sahl * If applicable, add the following below this CDDL HEADER, with the 16*2633Sahl * fields enclosed by brackets "[]" replaced with your own identifying 17*2633Sahl * information: Portions Copyright [yyyy] [name of copyright owner] 18*2633Sahl * 19*2633Sahl * CDDL HEADER END 20*2633Sahl */ 21*2633Sahl 22*2633Sahl /* 23*2633Sahl * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24*2633Sahl * Use is subject to license terms. 25*2633Sahl */ 26*2633Sahl 27*2633Sahl #pragma ident "%Z%%M% %I% %E% SMI" 28*2633Sahl 29*2633Sahl /* 30*2633Sahl * ASSERTION: 31*2633Sahl * Positive test for ring buffer policy. 32*2633Sahl * 33*2633Sahl * SECTION: Buffers and Buffering/ring Policy; 34*2633Sahl * Buffers and Buffering/Buffer Sizes; 35*2633Sahl * Options and Tunables/bufsize; 36*2633Sahl * Options and Tunables/bufpolicy 37*2633Sahl */ 38*2633Sahl 39*2633Sahl /* 40*2633Sahl * We make some regrettable assumptions about the implementation in this test. 41*2633Sahl * First, we assume that each entry for the printf() of an int takes _exactly_ 42*2633Sahl * eight bytes (four bytes for the EPID, four bytes for the payload). Second, 43*2633Sahl * we assume that by allocating storage for n + 1 records, we will get exactly 44*2633Sahl * n. Here is why: the final predicate that evaluates to false will reserve 45*2633Sahl * space that it won't use. This act of reservation will advance the wrapped 46*2633Sahl * offset. That record won't be subsequently used, but the wrapped offset has 47*2633Sahl * advanced. (And in this case, that old record is clobbered by the exit() 48*2633Sahl * anyway.) Thirdly: we rely on t_cpu/cpu_id. Finally: we rely on being 49*2633Sahl * able to run on the CPU that we first ran on. 50*2633Sahl */ 51*2633Sahl #pragma D option bufpolicy=ring 52*2633Sahl #pragma D option bufsize=40 53*2633Sahl #pragma D option quiet 54*2633Sahl 55*2633Sahl int n; 56*2633Sahl 57*2633Sahl BEGIN 58*2633Sahl { 59*2633Sahl cpuid = -1; 60*2633Sahl } 61*2633Sahl 62*2633Sahl tick-10msec 63*2633Sahl /cpuid == -1/ 64*2633Sahl { 65*2633Sahl cpuid = curthread->t_cpu->cpu_id; 66*2633Sahl } 67*2633Sahl 68*2633Sahl tick-10msec 69*2633Sahl /curthread->t_cpu->cpu_id == cpuid && n < 100/ 70*2633Sahl { 71*2633Sahl printf("%d\n", n++); 72*2633Sahl } 73*2633Sahl 74*2633Sahl tick-10msec 75*2633Sahl /n == 100/ 76*2633Sahl { 77*2633Sahl exit(0); 78*2633Sahl } 79