sim_events.cc revision 2667
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 48SimLoopExitEvent::process() 49{ 50 // if this got scheduled on a different queue (e.g. the committed 51 // instruction queue) then make a corresponding event on the main 52 // queue. 53 if (theQueue() != &mainEventQueue) { 54 exitSimLoop(cause, code); 55 delete this; 56 } 57 58 // otherwise do nothing... the IsExitEvent flag takes care of 59 // exiting the simulation loop and returning this object to Python 60} 61 62 63const char * 64SimLoopExitEvent::description() 65{ 66 return "simulation loop exit"; 67} 68 69void 70exitSimLoop(Tick when, const std::string &message, int exit_code) 71{ 72 new SimLoopExitEvent(when, message, exit_code); 73} 74 75void 76exitSimLoop(const std::string &message, int exit_code) 77{ 78 exitSimLoop(curTick, message, exit_code); 79} 80 81// 82// constructor: automatically schedules at specified time 83// 84CountedExitEvent::CountedExitEvent(EventQueue *q, const std::string &_cause, 85 Tick _when, int &_downCounter) 86 : Event(q, Sim_Exit_Pri), 87 cause(_cause), 88 downCounter(_downCounter) 89{ 90 // catch stupid mistakes 91 assert(downCounter > 0); 92 93 schedule(_when); 94} 95 96 97// 98// handle termination event 99// 100void 101CountedExitEvent::process() 102{ 103 if (--downCounter == 0) { 104 exitSimLoop(cause, 0); 105 } 106} 107 108 109const char * 110CountedExitEvent::description() 111{ 112 return "counted exit"; 113} 114 115#ifdef CHECK_SWAP_CYCLES 116new CheckSwapEvent(&mainEventQueue, CHECK_SWAP_CYCLES); 117#endif 118 119void 120CheckSwapEvent::process() 121{ 122 /* Check the amount of free swap space */ 123 long swap; 124 125 /* returns free swap in KBytes */ 126 swap = procInfo("/proc/meminfo", "SwapFree:"); 127 128 if (swap < 1000) 129 ccprintf(cerr, "\a\a\aWarning! Swap space is low (%d)\n", swap); 130 131 if (swap < 100) { 132 cerr << "\a\aAborting Simulation! Inadequate swap space!\n\n"; 133 exitSimLoop("Lack of swap space"); 134 } 135 136 schedule(curTick + interval); 137} 138 139const char * 140CheckSwapEvent::description() 141{ 142 return "check swap"; 143} 144 145// 146// handle progress event: print message and reschedule 147// 148void 149ProgressEvent::process() 150{ 151 DPRINTFN("ProgressEvent\n"); 152 // reschedule for next interval 153 schedule(curTick + interval); 154} 155 156 157const char * 158ProgressEvent::description() 159{ 160 return "progress message"; 161} 162