kernel_stats.cc revision 11793 
1/*
2 * Copyright (c) 2004-2005 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: Lisa Hsu
29 *          Nathan Binkert
30 */
31
32#include "arch/alpha/kernel_stats.hh"
33
34#include <map>
35#include <stack>
36#include <string>
37
38#include "arch/alpha/osfpal.hh"
39#include "arch/generic/linux/threadinfo.hh"
40#include "base/trace.hh"
41#include "cpu/thread_context.hh"
42#include "debug/Context.hh"
43#include "sim/system.hh"
44
45using namespace std;
46using namespace Stats;
47
48namespace AlphaISA {
49namespace Kernel {
50
51const char *modestr[] = { "kernel", "user", "idle" };
52
53Statistics::Statistics(System *system)
54    : ::Kernel::Statistics(system),
55      idleProcess((Addr)-1), themode(kernel), lastModeTick(0)
56{
57}
58
59void
60Statistics::regStats(const string &_name)
61{
62    ::Kernel::Statistics::regStats(_name);
63
64    _callpal
65        .init(256)
66        .name(name() + ".callpal")
67        .desc("number of callpals executed")
68        .flags(total | pdf | nozero | nonan)
69        ;
70
71    for (int i = 0; i < PAL::NumCodes; ++i) {
72        const char *str = PAL::name(i);
73        if (str)
74            _callpal.subname(i, str);
75    }
76
77    _hwrei
78        .name(name() + ".inst.hwrei")
79        .desc("number of hwrei instructions executed")
80        ;
81
82    _mode
83        .init(cpu_mode_num)
84        .name(name() + ".mode_switch")
85        .desc("number of protection mode switches")
86        ;
87
88    for (int i = 0; i < cpu_mode_num; ++i)
89        _mode.subname(i, modestr[i]);
90
91    _modeGood
92        .init(cpu_mode_num)
93        .name(name() + ".mode_good")
94        ;
95
96    for (int i = 0; i < cpu_mode_num; ++i)
97        _modeGood.subname(i, modestr[i]);
98
99    _modeFraction
100        .name(name() + ".mode_switch_good")
101        .desc("fraction of useful protection mode switches")
102        .flags(total)
103        ;
104
105    for (int i = 0; i < cpu_mode_num; ++i)
106        _modeFraction.subname(i, modestr[i]);
107
108    _modeFraction = _modeGood / _mode;
109
110    _modeTicks
111        .init(cpu_mode_num)
112        .name(name() + ".mode_ticks")
113        .desc("number of ticks spent at the given mode")
114        .flags(pdf)
115        ;
116    for (int i = 0; i < cpu_mode_num; ++i)
117        _modeTicks.subname(i, modestr[i]);
118
119    _swap_context
120        .name(name() + ".swap_context")
121        .desc("number of times the context was actually changed")
122        ;
123}
124
125void
126Statistics::setIdleProcess(Addr idlepcbb, ThreadContext *tc)
127{
128    assert(themode == kernel);
129    idleProcess = idlepcbb;
130    themode = idle;
131    changeMode(themode, tc);
132}
133
134void
135Statistics::changeMode(cpu_mode newmode, ThreadContext *tc)
136{
137    _mode[newmode]++;
138
139    if (newmode == themode)
140        return;
141
142    DPRINTF(Context, "old mode=%s new mode=%s pid=%d\n",
143            modestr[themode], modestr[newmode],
144            Linux::ThreadInfo(tc).curTaskPID());
145
146    _modeGood[newmode]++;
147    _modeTicks[themode] += curTick() - lastModeTick;
148
149    lastModeTick = curTick();
150    themode = newmode;
151}
152
153void
154Statistics::mode(cpu_mode newmode, ThreadContext *tc)
155{
156    Addr pcbb = tc->readMiscRegNoEffect(IPR_PALtemp23);
157
158    if (newmode == kernel && pcbb == idleProcess)
159        newmode = idle;
160
161    changeMode(newmode, tc);
162}
163
164void
165Statistics::context(Addr oldpcbb, Addr newpcbb, ThreadContext *tc)
166{
167    assert(themode != user);
168
169    _swap_context++;
170    changeMode(newpcbb == idleProcess ? idle : kernel, tc);
171
172    DPRINTF(Context, "Context Switch old pid=%d new pid=%d\n",
173            Linux::ThreadInfo(tc, oldpcbb).curTaskPID(),
174            Linux::ThreadInfo(tc, newpcbb).curTaskPID());
175}
176
177void
178Statistics::callpal(int code, ThreadContext *tc)
179{
180    if (!PAL::name(code))
181        return;
182
183    _callpal[code]++;
184}
185
186void
187Statistics::serialize(CheckpointOut &cp) const
188{
189    ::Kernel::Statistics::serialize(cp);
190    int exemode = themode;
191    SERIALIZE_SCALAR(exemode);
192    SERIALIZE_SCALAR(idleProcess);
193    SERIALIZE_SCALAR(lastModeTick);
194}
195
196void
197Statistics::unserialize(CheckpointIn &cp)
198{
199    ::Kernel::Statistics::unserialize(cp);
200    int exemode;
201    UNSERIALIZE_SCALAR(exemode);
202    UNSERIALIZE_SCALAR(idleProcess);
203    UNSERIALIZE_SCALAR(lastModeTick);
204    themode = (cpu_mode)exemode;
205}
206
207} // namespace Kernel
208} // namespace AlphaISA
209