1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma D option quiet 28*0Sstevel@tonic-gate #pragma D option nspec=4 29*0Sstevel@tonic-gate #pragma D option specsize=100k 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate int maxlen; 32*0Sstevel@tonic-gate int spec[int]; 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate sched:::enqueue 35*0Sstevel@tonic-gate { 36*0Sstevel@tonic-gate this->len = ++qlen[this->cpu = args[2]->cpu_id]; 37*0Sstevel@tonic-gate in[args[0]->pr_addr] = timestamp; 38*0Sstevel@tonic-gate } 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate sched:::enqueue 41*0Sstevel@tonic-gate /this->len > maxlen && spec[this->cpu]/ 42*0Sstevel@tonic-gate { 43*0Sstevel@tonic-gate /* 44*0Sstevel@tonic-gate * There is already a speculation for this CPU. We just set a new 45*0Sstevel@tonic-gate * record, so we'll discard the old one. 46*0Sstevel@tonic-gate */ 47*0Sstevel@tonic-gate discard(spec[this->cpu]); 48*0Sstevel@tonic-gate } 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate sched:::enqueue 51*0Sstevel@tonic-gate /this->len > maxlen/ 52*0Sstevel@tonic-gate { 53*0Sstevel@tonic-gate /* 54*0Sstevel@tonic-gate * We have a winner. Set the new maximum length and set the timestamp 55*0Sstevel@tonic-gate * of the longest length. 56*0Sstevel@tonic-gate */ 57*0Sstevel@tonic-gate maxlen = this->len; 58*0Sstevel@tonic-gate longtime[this->cpu] = timestamp; 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate /* 61*0Sstevel@tonic-gate * Now start a new speculation, and speculatively trace the length. 62*0Sstevel@tonic-gate */ 63*0Sstevel@tonic-gate this->spec = spec[this->cpu] = speculation(); 64*0Sstevel@tonic-gate speculate(this->spec); 65*0Sstevel@tonic-gate printf("Run queue of length %d:\n", this->len); 66*0Sstevel@tonic-gate } 67*0Sstevel@tonic-gate 68*0Sstevel@tonic-gate sched:::dequeue 69*0Sstevel@tonic-gate /(this->in = in[args[0]->pr_addr]) && 70*0Sstevel@tonic-gate this->in <= longtime[this->cpu = args[2]->cpu_id]/ 71*0Sstevel@tonic-gate { 72*0Sstevel@tonic-gate speculate(spec[this->cpu]); 73*0Sstevel@tonic-gate printf(" %d/%d (%s)\n", 74*0Sstevel@tonic-gate args[1]->pr_pid, args[0]->pr_lwpid, 75*0Sstevel@tonic-gate stringof(args[1]->pr_fname)); 76*0Sstevel@tonic-gate } 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate sched:::dequeue 79*0Sstevel@tonic-gate /qlen[args[2]->cpu_id]/ 80*0Sstevel@tonic-gate { 81*0Sstevel@tonic-gate in[args[0]->pr_addr] = 0; 82*0Sstevel@tonic-gate this->len = --qlen[args[2]->cpu_id]; 83*0Sstevel@tonic-gate } 84*0Sstevel@tonic-gate 85*0Sstevel@tonic-gate sched:::dequeue 86*0Sstevel@tonic-gate /this->len == 0 && spec[this->cpu]/ 87*0Sstevel@tonic-gate { 88*0Sstevel@tonic-gate /* 89*0Sstevel@tonic-gate * We just processed the last thread that was enqueued at the time 90*0Sstevel@tonic-gate * of longest length; commit the speculation, which by now contains 91*0Sstevel@tonic-gate * each thread that was enqueued when the queue was longest. 92*0Sstevel@tonic-gate */ 93*0Sstevel@tonic-gate commit(spec[this->cpu]); 94*0Sstevel@tonic-gate spec[this->cpu] = 0; 95*0Sstevel@tonic-gate } 96