sim_events.cc revision 601
1/* 2 * Copyright (c) 2003 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 29#include <string> 30 31#include "base/callback.hh" 32#include "base/hostinfo.hh" 33#include "sim/eventq.hh" 34#include "sim/param.hh" 35#include "sim/sim_events.hh" 36#include "sim/sim_exit.hh" 37#include "sim/sim_init.hh" 38#include "sim/sim_stats.hh" 39 40using namespace std; 41 42// 43// handle termination event 44// 45void 46SimExitEvent::process() 47{ 48 // This event does not autodelete because exitNow may be called, 49 // and the function will never be allowed to finish. 50 if (theQueue() == &mainEventQueue) { 51 string _cause = cause; 52 int _code = code; 53 delete this; 54 exitNow(_cause, _code); 55 } else { 56 new SimExitEvent(cause, code); 57 delete this; 58 } 59} 60 61 62const char * 63SimExitEvent::description() 64{ 65 return "simulation termination"; 66} 67 68// 69// constructor: automatically schedules at specified time 70// 71CountedExitEvent::CountedExitEvent(EventQueue *q, const std::string &_cause, 72 Tick _when, int &_downCounter) 73 : Event(q, Sim_Exit_Pri), 74 cause(_cause), 75 downCounter(_downCounter) 76{ 77 // catch stupid mistakes 78 assert(downCounter > 0); 79 80 schedule(_when); 81} 82 83 84// 85// handle termination event 86// 87void 88CountedExitEvent::process() 89{ 90 if (--downCounter == 0) { 91 new SimExitEvent(cause, 0); 92 } 93} 94 95 96const char * 97CountedExitEvent::description() 98{ 99 return "counted exit"; 100} 101 102#ifdef CHECK_SWAP_CYCLES 103new CheckSwapEvent(&mainEventQueue, CHECK_SWAP_CYCLES); 104#endif 105 106void 107CheckSwapEvent::process() 108{ 109 /* Check the amount of free swap space */ 110 long swap; 111 112 /* returns free swap in KBytes */ 113 swap = procInfo("/proc/meminfo", "SwapFree:"); 114 115 if (swap < 1000) 116 ccprintf(cerr, "\a\a\aWarning! Swap space is low (%d)\n", swap); 117 118 if (swap < 100) { 119 cerr << "\a\aAborting Simulation! Inadequate swap space!\n\n"; 120 new SimExitEvent("Lack of swap space"); 121 } 122 123 schedule(curTick + interval); 124} 125 126const char * 127CheckSwapEvent::description() 128{ 129 return "check swap"; 130} 131 132 133/////////////////////////////////////////////////// 134// 135// Simulation termination parameters 136// 137/////////////////////////////////////////////////// 138 139class TermParamContext : public ParamContext 140{ 141 public: 142 TermParamContext(const string &_iniSection) 143 : ParamContext(_iniSection) {} 144 void checkParams(); 145}; 146 147TermParamContext simTerminationParams("max"); 148 149Param<Tick> max_cycle(&simTerminationParams, "cycle", 150 "maximum number of cycles to execute"); 151 152void 153TermParamContext::checkParams() 154{ 155 // if a max cycle count was specified, put a termination event on 156 // the event queue at that point 157 if (max_cycle.isValid()) 158 new SimExitEvent(max_cycle, "reached maximum cycle count"); 159} 160 161// 162// Progress event: print out cycle every so often so we know we're 163// making forward progress. 164// 165class ProgressEvent : public Event 166{ 167 protected: 168 Tick interval; 169 170 public: 171 ProgressEvent(EventQueue *q, Tick interval); 172 173 void process(); // process event 174 virtual const char *description(); 175}; 176 177// 178// constructor: schedule at specified time 179// 180ProgressEvent::ProgressEvent(EventQueue *q, Tick _interval) 181 : Event(q), interval(_interval) 182{ 183 schedule(curTick + interval); 184} 185 186// 187// handle progress event: print message and reschedule 188// 189void 190ProgressEvent::process() 191{ 192 DPRINTFN("ProgressEvent\n"); 193 // reschedule for next interval 194 schedule(curTick + interval); 195} 196 197 198const char * 199ProgressEvent::description() 200{ 201 return "progress message"; 202} 203 204///////// 205// 206// Periodic progress message support: print out a message every n 207// cycles so we know we're making forward progress. 208// 209///////// 210 211// Parameter space for execution address tracing options. Derive 212// from ParamContext so we can override checkParams() function. 213class ProgressParamContext : public ParamContext 214{ 215 public: 216 ProgressParamContext(const string &_iniSection) 217 : ParamContext(_iniSection) {} 218 void checkParams(); 219}; 220 221ProgressParamContext progessMessageParams("progress"); 222 223Param<Tick> progress_interval(&progessMessageParams, "cycle", 224 "cycle interval for progress messages"); 225 226namespace { 227 struct SetupProgress : public Callback 228 { 229 Tick interval; 230 SetupProgress(Tick tick) : interval(tick) {} 231 232 virtual void process() 233 { 234 new ProgressEvent(&mainEventQueue, interval); 235 delete this; 236 } 237 }; 238} 239 240/* check execute options */ 241void 242ProgressParamContext::checkParams() 243{ 244 if (progress_interval.isValid()) 245 registerInitCallback(new SetupProgress(progress_interval)); 246} 247