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;

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35#include "sim/eventq.hh"
36#include "sim/sim_events.hh"
37#include "sim/sim_exit.hh"
38#include "sim/startup.hh"
39#include "sim/stats.hh"
40
41using namespace std;
42
43//
44// handle termination event
45//
46void
47SimLoopExitEvent::process()
48{
49 // if this got scheduled on a different queue (e.g. the committed
50 // instruction queue) then make a corresponding event on the main
51 // queue.
52 if (queue() != &mainEventQueue) {
53 exitSimLoop(cause, code);
54 delete this;
55 }
56
57 // otherwise do nothing... the IsExitEvent flag takes care of
58 // exiting the simulation loop and returning this object to Python
59
60 // but if you are doing this on intervals, don't forget to make another
61 if (repeat) {
62 schedule(curTick + repeat);
63 }
64}
65
66
67const char *
68SimLoopExitEvent::description() const
69{
70 return "simulation loop exit";
71}
72
73SimLoopExitEvent *
74schedExitSimLoop(const std::string &message, Tick when, Tick repeat,
75 EventQueue *q, int exit_code)
76{
77 if (q == NULL)
78 q = &mainEventQueue;
79
80 return new SimLoopExitEvent(q, when, repeat, message, exit_code);
81}
82
83void
84exitSimLoop(const std::string &message, int exit_code)
85{
86 schedExitSimLoop(message, curTick, 0, NULL, exit_code);
87}
88
89void
90CountedDrainEvent::process()
91{
92 if (--count == 0) {
93 exitSimLoop("Finished drain");
94 }
95}
96
97//
98// constructor: automatically schedules at specified time
99//
100CountedExitEvent::CountedExitEvent(EventQueue *q, const std::string &_cause,
101 Tick _when, int &_downCounter)
102 : Event(q, Sim_Exit_Pri),
103 cause(_cause),
104 downCounter(_downCounter)
105{
106 // catch stupid mistakes
107 assert(downCounter > 0);
108
109 schedule(_when);
110}
111
112
113//
114// handle termination event
115//
116void
117CountedExitEvent::process()

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123
124
125const char *
126CountedExitEvent::description() const
127{
128 return "counted exit";
129}
130
131#ifdef CHECK_SWAP_CYCLES
132new CheckSwapEvent(&mainEventQueue, CHECK_SWAP_CYCLES);
133#endif
134
135void
136CheckSwapEvent::process()
137{
138 /* Check the amount of free swap space */
139 long swap;
140
141 /* returns free swap in KBytes */
142 swap = procInfo("/proc/meminfo", "SwapFree:");
143
144 if (swap < 1000)
145 ccprintf(cerr, "\a\a\aWarning! Swap space is low (%d)\n", swap);
146
147 if (swap < 100) {
148 cerr << "\a\aAborting Simulation! Inadequate swap space!\n\n";
149 exitSimLoop("Lack of swap space");
150 }
151
152 schedule(curTick + interval);
153}
154
155const char *
156CheckSwapEvent::description() const
157{
158 return "check swap";
159}