kernel_stats.cc revision 3544:3db423e3b41d 
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/osfpal.hh"
37#include "base/trace.hh"
38#include "cpu/thread_context.hh"
39#include "kern/kernel_stats.hh"
40#include "kern/tru64/tru64_syscalls.hh"
41#include "sim/system.hh"
42
43using namespace std;
44using namespace Stats;
45
46namespace Kernel {
47
48const char *modestr[] = { "kernel", "user", "idle" };
49
50Statistics::Statistics(System *system)
51    : idleProcess((Addr)-1), themode(kernel), lastModeTick(0),
52      iplLast(0), iplLastTick(0)
53{
54}
55
56void
57Statistics::regStats(const string &_name)
58{
59    myname = _name;
60
61    _arm
62        .name(name() + ".inst.arm")
63        .desc("number of arm instructions executed")
64        ;
65
66    _quiesce
67        .name(name() + ".inst.quiesce")
68        .desc("number of quiesce instructions executed")
69        ;
70
71    _hwrei
72        .name(name() + ".inst.hwrei")
73        .desc("number of hwrei instructions executed")
74        ;
75
76    _iplCount
77        .init(32)
78        .name(name() + ".ipl_count")
79        .desc("number of times we switched to this ipl")
80        .flags(total | pdf | nozero | nonan)
81        ;
82
83    _iplGood
84        .init(32)
85        .name(name() + ".ipl_good")
86        .desc("number of times we switched to this ipl from a different ipl")
87        .flags(total | pdf | nozero | nonan)
88        ;
89
90    _iplTicks
91        .init(32)
92        .name(name() + ".ipl_ticks")
93        .desc("number of cycles we spent at this ipl")
94        .flags(total | pdf | nozero | nonan)
95        ;
96
97    _iplUsed
98        .name(name() + ".ipl_used")
99        .desc("fraction of swpipl calls that actually changed the ipl")
100        .flags(total | nozero | nonan)
101        ;
102
103    _iplUsed = _iplGood / _iplCount;
104
105    _callpal
106        .init(256)
107        .name(name() + ".callpal")
108        .desc("number of callpals executed")
109        .flags(total | pdf | nozero | nonan)
110        ;
111
112    for (int i = 0; i < PAL::NumCodes; ++i) {
113        const char *str = PAL::name(i);
114        if (str)
115            _callpal.subname(i, str);
116    }
117
118    _syscall
119        .init(SystemCalls<Tru64>::Number)
120        .name(name() + ".syscall")
121        .desc("number of syscalls executed")
122        .flags(total | pdf | nozero | nonan)
123        ;
124
125    for (int i = 0; i < SystemCalls<Tru64>::Number; ++i) {
126        const char *str = SystemCalls<Tru64>::name(i);
127        if (str) {
128            _syscall.subname(i, str);
129        }
130    }
131
132    _mode
133        .init(cpu_mode_num)
134        .name(name() + ".mode_switch")
135        .desc("number of protection mode switches")
136        ;
137
138    for (int i = 0; i < cpu_mode_num; ++i)
139        _mode.subname(i, modestr[i]);
140
141    _modeGood
142        .init(cpu_mode_num)
143        .name(name() + ".mode_good")
144        ;
145
146    for (int i = 0; i < cpu_mode_num; ++i)
147        _modeGood.subname(i, modestr[i]);
148
149    _modeFraction
150        .name(name() + ".mode_switch_good")
151        .desc("fraction of useful protection mode switches")
152        .flags(total)
153        ;
154
155    for (int i = 0; i < cpu_mode_num; ++i)
156        _modeFraction.subname(i, modestr[i]);
157
158    _modeFraction = _modeGood / _mode;
159
160    _modeTicks
161        .init(cpu_mode_num)
162        .name(name() + ".mode_ticks")
163        .desc("number of ticks spent at the given mode")
164        .flags(pdf)
165        ;
166    for (int i = 0; i < cpu_mode_num; ++i)
167        _modeTicks.subname(i, modestr[i]);
168
169    _swap_context
170        .name(name() + ".swap_context")
171        .desc("number of times the context was actually changed")
172        ;
173}
174
175void
176Statistics::setIdleProcess(Addr idlepcbb, ThreadContext *tc)
177{
178    assert(themode == kernel);
179    idleProcess = idlepcbb;
180    themode = idle;
181    changeMode(themode, tc);
182}
183
184void
185Statistics::changeMode(cpu_mode newmode, ThreadContext *tc)
186{
187    _mode[newmode]++;
188
189    if (newmode == themode)
190        return;
191
192    DPRINTF(Context, "old mode=%-8s new mode=%-8s\n",
193            modestr[themode], modestr[newmode]);
194
195    _modeGood[newmode]++;
196    _modeTicks[themode] += curTick - lastModeTick;
197
198    lastModeTick = curTick;
199    themode = newmode;
200}
201
202void
203Statistics::swpipl(int ipl)
204{
205    assert(ipl >= 0 && ipl <= 0x1f && "invalid IPL\n");
206
207    _iplCount[ipl]++;
208
209    if (ipl == iplLast)
210        return;
211
212    _iplGood[ipl]++;
213    _iplTicks[iplLast] += curTick - iplLastTick;
214    iplLastTick = curTick;
215    iplLast = ipl;
216}
217
218void
219Statistics::mode(cpu_mode newmode, ThreadContext *tc)
220{
221    Addr pcbb = tc->readMiscReg(AlphaISA::IPR_PALtemp23);
222
223    if (newmode == kernel && pcbb == idleProcess)
224        newmode = idle;
225
226    changeMode(newmode, tc);
227}
228
229void
230Statistics::context(Addr oldpcbb, Addr newpcbb, ThreadContext *tc)
231{
232    assert(themode != user);
233
234    _swap_context++;
235    changeMode(newpcbb == idleProcess ? idle : kernel, tc);
236}
237
238void
239Statistics::callpal(int code, ThreadContext *tc)
240{
241    if (!PAL::name(code))
242        return;
243
244    _callpal[code]++;
245
246    switch (code) {
247      case PAL::callsys: {
248          int number = tc->readIntReg(0);
249          if (SystemCalls<Tru64>::validSyscallNumber(number)) {
250              int cvtnum = SystemCalls<Tru64>::convert(number);
251              _syscall[cvtnum]++;
252          }
253      } break;
254    }
255}
256
257void
258Statistics::serialize(ostream &os)
259{
260    int exemode = themode;
261    SERIALIZE_SCALAR(exemode);
262    SERIALIZE_SCALAR(idleProcess);
263    SERIALIZE_SCALAR(iplLast);
264    SERIALIZE_SCALAR(iplLastTick);
265    SERIALIZE_SCALAR(lastModeTick);
266}
267
268void
269Statistics::unserialize(Checkpoint *cp, const string &section)
270{
271    int exemode;
272    UNSERIALIZE_SCALAR(exemode);
273    UNSERIALIZE_SCALAR(idleProcess);
274    UNSERIALIZE_SCALAR(iplLast);
275    UNSERIALIZE_SCALAR(iplLastTick);
276    UNSERIALIZE_SCALAR(lastModeTick);
277    themode = (cpu_mode)exemode;
278}
279
280/* end namespace Kernel */ }
281