kernel_stats.cc revision 2716:b9114064d77a 
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    _ivlb
72        .name(name() + ".inst.ivlb")
73        .desc("number of ivlb instructions executed")
74        ;
75
76    _ivle
77        .name(name() + ".inst.ivle")
78        .desc("number of ivle instructions executed")
79        ;
80
81    _hwrei
82        .name(name() + ".inst.hwrei")
83        .desc("number of hwrei instructions executed")
84        ;
85
86    _iplCount
87        .init(32)
88        .name(name() + ".ipl_count")
89        .desc("number of times we switched to this ipl")
90        .flags(total | pdf | nozero | nonan)
91        ;
92
93    _iplGood
94        .init(32)
95        .name(name() + ".ipl_good")
96        .desc("number of times we switched to this ipl from a different ipl")
97        .flags(total | pdf | nozero | nonan)
98        ;
99
100    _iplTicks
101        .init(32)
102        .name(name() + ".ipl_ticks")
103        .desc("number of cycles we spent at this ipl")
104        .flags(total | pdf | nozero | nonan)
105        ;
106
107    _iplUsed
108        .name(name() + ".ipl_used")
109        .desc("fraction of swpipl calls that actually changed the ipl")
110        .flags(total | nozero | nonan)
111        ;
112
113    _iplUsed = _iplGood / _iplCount;
114
115    _callpal
116        .init(256)
117        .name(name() + ".callpal")
118        .desc("number of callpals executed")
119        .flags(total | pdf | nozero | nonan)
120        ;
121
122    for (int i = 0; i < PAL::NumCodes; ++i) {
123        const char *str = PAL::name(i);
124        if (str)
125            _callpal.subname(i, str);
126    }
127
128    _syscall
129        .init(SystemCalls<Tru64>::Number)
130        .name(name() + ".syscall")
131        .desc("number of syscalls executed")
132        .flags(total | pdf | nozero | nonan)
133        ;
134
135    for (int i = 0; i < SystemCalls<Tru64>::Number; ++i) {
136        const char *str = SystemCalls<Tru64>::name(i);
137        if (str) {
138            _syscall.subname(i, str);
139        }
140    }
141
142    _mode
143        .init(cpu_mode_num)
144        .name(name() + ".mode_switch")
145        .desc("number of protection mode switches")
146        ;
147
148    for (int i = 0; i < cpu_mode_num; ++i)
149        _mode.subname(i, modestr[i]);
150
151    _modeGood
152        .init(cpu_mode_num)
153        .name(name() + ".mode_good")
154        ;
155
156    for (int i = 0; i < cpu_mode_num; ++i)
157        _modeGood.subname(i, modestr[i]);
158
159    _modeFraction
160        .name(name() + ".mode_switch_good")
161        .desc("fraction of useful protection mode switches")
162        .flags(total)
163        ;
164
165    for (int i = 0; i < cpu_mode_num; ++i)
166        _modeFraction.subname(i, modestr[i]);
167
168    _modeFraction = _modeGood / _mode;
169
170    _modeTicks
171        .init(cpu_mode_num)
172        .name(name() + ".mode_ticks")
173        .desc("number of ticks spent at the given mode")
174        .flags(pdf)
175        ;
176    for (int i = 0; i < cpu_mode_num; ++i)
177        _modeTicks.subname(i, modestr[i]);
178
179    _swap_context
180        .name(name() + ".swap_context")
181        .desc("number of times the context was actually changed")
182        ;
183}
184
185void
186Statistics::setIdleProcess(Addr idlepcbb, ThreadContext *tc)
187{
188    assert(themode == kernel);
189    idleProcess = idlepcbb;
190    themode = idle;
191    changeMode(themode, tc);
192}
193
194void
195Statistics::changeMode(cpu_mode newmode, ThreadContext *tc)
196{
197    _mode[newmode]++;
198
199    if (newmode == themode)
200        return;
201
202    DPRINTF(Context, "old mode=%-8s new mode=%-8s\n",
203            modestr[themode], modestr[newmode]);
204
205    _modeGood[newmode]++;
206    _modeTicks[themode] += curTick - lastModeTick;
207
208    lastModeTick = curTick;
209    themode = newmode;
210}
211
212void
213Statistics::swpipl(int ipl)
214{
215    assert(ipl >= 0 && ipl <= 0x1f && "invalid IPL\n");
216
217    _iplCount[ipl]++;
218
219    if (ipl == iplLast)
220        return;
221
222    _iplGood[ipl]++;
223    _iplTicks[iplLast] += curTick - iplLastTick;
224    iplLastTick = curTick;
225    iplLast = ipl;
226}
227
228void
229Statistics::mode(cpu_mode newmode, ThreadContext *tc)
230{
231    Addr pcbb = tc->readMiscReg(AlphaISA::IPR_PALtemp23);
232
233    if (newmode == kernel && pcbb == idleProcess)
234        newmode = idle;
235
236    changeMode(newmode, tc);
237}
238
239void
240Statistics::context(Addr oldpcbb, Addr newpcbb, ThreadContext *tc)
241{
242    assert(themode != user);
243
244    _swap_context++;
245    changeMode(newpcbb == idleProcess ? idle : kernel, tc);
246}
247
248void
249Statistics::callpal(int code, ThreadContext *tc)
250{
251    if (!PAL::name(code))
252        return;
253
254    _callpal[code]++;
255
256    switch (code) {
257      case PAL::callsys: {
258          int number = tc->readIntReg(0);
259          if (SystemCalls<Tru64>::validSyscallNumber(number)) {
260              int cvtnum = SystemCalls<Tru64>::convert(number);
261              _syscall[cvtnum]++;
262          }
263      } break;
264    }
265}
266
267void
268Statistics::serialize(ostream &os)
269{
270    int exemode = themode;
271    SERIALIZE_SCALAR(exemode);
272    SERIALIZE_SCALAR(idleProcess);
273    SERIALIZE_SCALAR(iplLast);
274    SERIALIZE_SCALAR(iplLastTick);
275    SERIALIZE_SCALAR(lastModeTick);
276}
277
278void
279Statistics::unserialize(Checkpoint *cp, const string &section)
280{
281    int exemode;
282    UNSERIALIZE_SCALAR(exemode);
283    UNSERIALIZE_SCALAR(idleProcess);
284    UNSERIALIZE_SCALAR(iplLast);
285    UNSERIALIZE_SCALAR(iplLastTick);
286    UNSERIALIZE_SCALAR(lastModeTick);
287    themode = (cpu_mode)exemode;
288}
289
290/* end namespace Kernel */ }
291