sim_events.cc revision 2665:a124942bacb8 
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