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 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * ASSERTION: An Id of zero though invalid may be passed to speculate(), 29 * commit() and discard() without any ill effects. 30 * 31 * SECTION: Speculative Tracing/Creating a Speculation; 32 * Options and Tunables/cleanrate 33 */ 34 #pragma D option quiet 35 #pragma D option cleanrate=4000hz 36 37 BEGIN 38 { 39 self->discardFlag = 0; 40 self->var1 = speculation(); 41 printf("Speculative buffer ID: %d\n", self->var1); 42 self->spec = speculation(); 43 printf("Speculative buffer ID: %d\n", self->spec); 44 } 45 46 BEGIN 47 /0 == self->spec/ 48 { 49 discard(self->spec); 50 self->discardFlag++; 51 } 52 53 BEGIN 54 /0 < self->discardFlag/ 55 { 56 printf("discard(), self->discardFlag = %d\n", self->discardFlag); 57 exit(0); 58 } 59 60 BEGIN 61 /0 == self->discardFlag/ 62 { 63 printf("discard(), self->discardFlag = %d\n", self->discardFlag); 64 exit(1); 65 } 66