sim_events.cc revision 2665
1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Nathan Binkert 29 */ 30 31#include <string> 32 33#include "base/callback.hh" 34#include "base/hostinfo.hh" 35#include "sim/eventq.hh" 36#include "sim/param.hh" 37#include "sim/sim_events.hh" 38#include "sim/sim_exit.hh" 39#include "sim/startup.hh" 40#include "sim/stats.hh" 41 42using namespace std; 43 44// 45// handle termination event 46// 47void 48SimExitEvent::process() 49{ 50 // This event does not autodelete because exitNow may be called, 51 // and the function will never be allowed to finish. 52 if (theQueue() == &mainEventQueue) { 53 string _cause = cause; 54 int _code = code; 55 delete this; 56 exitNow(_cause, _code); 57 } else { 58 new SimExitEvent(cause, code); 59 delete this; 60 } 61} 62 63 64const char * 65SimExitEvent::description() 66{ 67 return "simulation termination"; 68} 69 70// 71// constructor: automatically schedules at specified time 72// 73CountedExitEvent::CountedExitEvent(EventQueue *q, const std::string &_cause, 74 Tick _when, int &_downCounter) 75 : Event(q, Sim_Exit_Pri), 76 cause(_cause), 77 downCounter(_downCounter) 78{ 79 // catch stupid mistakes 80 assert(downCounter > 0); 81 82 schedule(_when); 83} 84 85 86// 87// handle termination event 88// 89void 90CountedExitEvent::process() 91{ 92 if (--downCounter == 0) { 93 new SimExitEvent(cause, 0); 94 } 95} 96 97 98const char * 99CountedExitEvent::description() 100{ 101 return "counted exit"; 102} 103 104#ifdef CHECK_SWAP_CYCLES 105new CheckSwapEvent(&mainEventQueue, CHECK_SWAP_CYCLES); 106#endif 107 108void 109CheckSwapEvent::process() 110{ 111 /* Check the amount of free swap space */ 112 long swap; 113 114 /* returns free swap in KBytes */ 115 swap = procInfo("/proc/meminfo", "SwapFree:"); 116 117 if (swap < 1000) 118 ccprintf(cerr, "\a\a\aWarning! Swap space is low (%d)\n", swap); 119 120 if (swap < 100) { 121 cerr << "\a\aAborting Simulation! Inadequate swap space!\n\n"; 122 new SimExitEvent("Lack of swap space"); 123 } 124 125 schedule(curTick + interval); 126} 127 128const char * 129CheckSwapEvent::description() 130{ 131 return "check swap"; 132} 133 134// 135// handle progress event: print message and reschedule 136// 137void 138ProgressEvent::process() 139{ 140 DPRINTFN("ProgressEvent\n"); 141 // reschedule for next interval 142 schedule(curTick + interval); 143} 144 145 146const char * 147ProgressEvent::description() 148{ 149 return "progress message"; 150} 151