kernel_stats.cc revision 7823:dac01f14f20f
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 <map>
33#include <stack>
34#include <string>
35
36#include "arch/alpha/linux/threadinfo.hh"
37#include "arch/alpha/kernel_stats.hh"
38#include "arch/alpha/osfpal.hh"
39#include "base/trace.hh"
40#include "cpu/thread_context.hh"
41#include "kern/tru64/tru64_syscalls.hh"
42#include "sim/system.hh"
43
44using namespace std;
45using namespace Stats;
46
47namespace AlphaISA {
48namespace Kernel {
49
50const char *modestr[] = { "kernel", "user", "idle" };
51
52Statistics::Statistics(System *system)
53    : ::Kernel::Statistics(system),
54      idleProcess((Addr)-1), themode(kernel), lastModeTick(0)
55{
56}
57
58void
59Statistics::regStats(const string &_name)
60{
61    ::Kernel::Statistics::regStats(_name);
62
63    _callpal
64        .init(256)
65        .name(name() + ".callpal")
66        .desc("number of callpals executed")
67        .flags(total | pdf | nozero | nonan)
68        ;
69
70    for (int i = 0; i < PAL::NumCodes; ++i) {
71        const char *str = PAL::name(i);
72        if (str)
73            _callpal.subname(i, str);
74    }
75
76    _hwrei
77        .name(name() + ".inst.hwrei")
78        .desc("number of hwrei instructions executed")
79        ;
80
81    _mode
82        .init(cpu_mode_num)
83        .name(name() + ".mode_switch")
84        .desc("number of protection mode switches")
85        ;
86
87    for (int i = 0; i < cpu_mode_num; ++i)
88        _mode.subname(i, modestr[i]);
89
90    _modeGood
91        .init(cpu_mode_num)
92        .name(name() + ".mode_good")
93        ;
94
95    for (int i = 0; i < cpu_mode_num; ++i)
96        _modeGood.subname(i, modestr[i]);
97
98    _modeFraction
99        .name(name() + ".mode_switch_good")
100        .desc("fraction of useful protection mode switches")
101        .flags(total)
102        ;
103
104    for (int i = 0; i < cpu_mode_num; ++i)
105        _modeFraction.subname(i, modestr[i]);
106
107    _modeFraction = _modeGood / _mode;
108
109    _modeTicks
110        .init(cpu_mode_num)
111        .name(name() + ".mode_ticks")
112        .desc("number of ticks spent at the given mode")
113        .flags(pdf)
114        ;
115    for (int i = 0; i < cpu_mode_num; ++i)
116        _modeTicks.subname(i, modestr[i]);
117
118    _swap_context
119        .name(name() + ".swap_context")
120        .desc("number of times the context was actually changed")
121        ;
122}
123
124void
125Statistics::setIdleProcess(Addr idlepcbb, ThreadContext *tc)
126{
127    assert(themode == kernel);
128    idleProcess = idlepcbb;
129    themode = idle;
130    changeMode(themode, tc);
131}
132
133void
134Statistics::changeMode(cpu_mode newmode, ThreadContext *tc)
135{
136    _mode[newmode]++;
137
138    if (newmode == themode)
139        return;
140
141    DPRINTF(Context, "old mode=%s new mode=%s pid=%d\n",
142            modestr[themode], modestr[newmode],
143            Linux::ThreadInfo(tc).curTaskPID());
144
145    _modeGood[newmode]++;
146    _modeTicks[themode] += curTick() - lastModeTick;
147
148    lastModeTick = curTick();
149    themode = newmode;
150}
151
152void
153Statistics::mode(cpu_mode newmode, ThreadContext *tc)
154{
155    Addr pcbb = tc->readMiscRegNoEffect(IPR_PALtemp23);
156
157    if (newmode == kernel && pcbb == idleProcess)
158        newmode = idle;
159
160    changeMode(newmode, tc);
161}
162
163void
164Statistics::context(Addr oldpcbb, Addr newpcbb, ThreadContext *tc)
165{
166    assert(themode != user);
167
168    _swap_context++;
169    changeMode(newpcbb == idleProcess ? idle : kernel, tc);
170
171    DPRINTF(Context, "Context Switch old pid=%d new pid=%d\n",
172            Linux::ThreadInfo(tc, oldpcbb).curTaskPID(),
173            Linux::ThreadInfo(tc, newpcbb).curTaskPID());
174}
175
176void
177Statistics::callpal(int code, ThreadContext *tc)
178{
179    if (!PAL::name(code))
180        return;
181
182    _callpal[code]++;
183
184    switch (code) {
185      case PAL::callsys: {
186          int number = tc->readIntReg(0);
187          if (SystemCalls<Tru64>::validSyscallNumber(number)) {
188              int cvtnum = SystemCalls<Tru64>::convert(number);
189              _syscall[cvtnum]++;
190          }
191      } break;
192    }
193}
194
195void
196Statistics::serialize(ostream &os)
197{
198    ::Kernel::Statistics::serialize(os);
199    int exemode = themode;
200    SERIALIZE_SCALAR(exemode);
201    SERIALIZE_SCALAR(idleProcess);
202    SERIALIZE_SCALAR(lastModeTick);
203}
204
205void
206Statistics::unserialize(Checkpoint *cp, const string &section)
207{
208    ::Kernel::Statistics::unserialize(cp, section);
209    int exemode;
210    UNSERIALIZE_SCALAR(exemode);
211    UNSERIALIZE_SCALAR(idleProcess);
212    UNSERIALIZE_SCALAR(lastModeTick);
213    themode = (cpu_mode)exemode;
214}
215
216} // namespace Kernel
217} // namespace AlphaISA
218