kernel_stats.cc revision 2632:1bb2f91485ea 
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
29#include <map>
30#include <stack>
31#include <string>
32
33#include "arch/alpha/osfpal.hh"
34#include "base/trace.hh"
35#include "cpu/exec_context.hh"
36#include "kern/kernel_stats.hh"
37#include "kern/tru64/tru64_syscalls.hh"
38#include "sim/system.hh"
39
40using namespace std;
41using namespace Stats;
42
43namespace Kernel {
44
45const char *modestr[] = { "kernel", "user", "idle", "interrupt" };
46
47Statistics::Statistics(System *system)
48    : idleProcess((Addr)-1), themode(kernel), lastModeTick(0),
49      iplLast(0), iplLastTick(0)
50{
51    bin_int = system->params()->bin_int;
52}
53
54void
55Statistics::regStats(const string &_name)
56{
57    myname = _name;
58
59    _arm
60        .name(name() + ".inst.arm")
61        .desc("number of arm instructions executed")
62        ;
63
64    _quiesce
65        .name(name() + ".inst.quiesce")
66        .desc("number of quiesce instructions executed")
67        ;
68
69    _ivlb
70        .name(name() + ".inst.ivlb")
71        .desc("number of ivlb instructions executed")
72        ;
73
74    _ivle
75        .name(name() + ".inst.ivle")
76        .desc("number of ivle instructions executed")
77        ;
78
79    _hwrei
80        .name(name() + ".inst.hwrei")
81        .desc("number of hwrei instructions executed")
82        ;
83
84    _iplCount
85        .init(32)
86        .name(name() + ".ipl_count")
87        .desc("number of times we switched to this ipl")
88        .flags(total | pdf | nozero | nonan)
89        ;
90
91    _iplGood
92        .init(32)
93        .name(name() + ".ipl_good")
94        .desc("number of times we switched to this ipl from a different ipl")
95        .flags(total | pdf | nozero | nonan)
96        ;
97
98    _iplTicks
99        .init(32)
100        .name(name() + ".ipl_ticks")
101        .desc("number of cycles we spent at this ipl")
102        .flags(total | pdf | nozero | nonan)
103        ;
104
105    _iplUsed
106        .name(name() + ".ipl_used")
107        .desc("fraction of swpipl calls that actually changed the ipl")
108        .flags(total | nozero | nonan)
109        ;
110
111    _iplUsed = _iplGood / _iplCount;
112
113    _callpal
114        .init(256)
115        .name(name() + ".callpal")
116        .desc("number of callpals executed")
117        .flags(total | pdf | nozero | nonan)
118        ;
119
120    for (int i = 0; i < PAL::NumCodes; ++i) {
121        const char *str = PAL::name(i);
122        if (str)
123            _callpal.subname(i, str);
124    }
125
126    _syscall
127        .init(SystemCalls<Tru64>::Number)
128        .name(name() + ".syscall")
129        .desc("number of syscalls executed")
130        .flags(total | pdf | nozero | nonan)
131        ;
132
133    for (int i = 0; i < SystemCalls<Tru64>::Number; ++i) {
134        const char *str = SystemCalls<Tru64>::name(i);
135        if (str) {
136            _syscall.subname(i, str);
137        }
138    }
139
140    _mode
141        .init(cpu_mode_num)
142        .name(name() + ".mode_switch")
143        .desc("number of protection mode switches")
144        ;
145
146    for (int i = 0; i < cpu_mode_num; ++i)
147        _mode.subname(i, modestr[i]);
148
149    _modeGood
150        .init(cpu_mode_num)
151        .name(name() + ".mode_good")
152        ;
153
154    for (int i = 0; i < cpu_mode_num; ++i)
155        _modeGood.subname(i, modestr[i]);
156
157    _modeFraction
158        .name(name() + ".mode_switch_good")
159        .desc("fraction of useful protection mode switches")
160        .flags(total)
161        ;
162
163    for (int i = 0; i < cpu_mode_num; ++i)
164        _modeFraction.subname(i, modestr[i]);
165
166    _modeFraction = _modeGood / _mode;
167
168    _modeTicks
169        .init(cpu_mode_num)
170        .name(name() + ".mode_ticks")
171        .desc("number of ticks spent at the given mode")
172        .flags(pdf)
173        ;
174    for (int i = 0; i < cpu_mode_num; ++i)
175        _modeTicks.subname(i, modestr[i]);
176
177    _swap_context
178        .name(name() + ".swap_context")
179        .desc("number of times the context was actually changed")
180        ;
181}
182
183void
184Statistics::setIdleProcess(Addr idlepcbb, ExecContext *xc)
185{
186    assert(themode == kernel || themode == interrupt);
187    idleProcess = idlepcbb;
188    themode = idle;
189    changeMode(themode, xc);
190}
191
192void
193Statistics::changeMode(cpu_mode newmode, ExecContext *xc)
194{
195    _mode[newmode]++;
196
197    if (newmode == themode)
198        return;
199
200    DPRINTF(Context, "old mode=%-8s new mode=%-8s\n",
201            modestr[themode], modestr[newmode]);
202
203    _modeGood[newmode]++;
204    _modeTicks[themode] += curTick - lastModeTick;
205
206    xc->getSystemPtr()->kernelBinning->changeMode(newmode);
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, ExecContext *xc)
230{
231    Addr pcbb = xc->readMiscReg(AlphaISA::IPR_PALtemp23);
232
233    if ((newmode == kernel || newmode == interrupt) &&
234            pcbb == idleProcess)
235        newmode = idle;
236
237    if (bin_int == false && newmode == interrupt)
238        newmode = kernel;
239
240    changeMode(newmode, xc);
241}
242
243void
244Statistics::context(Addr oldpcbb, Addr newpcbb, ExecContext *xc)
245{
246    assert(themode != user);
247
248    _swap_context++;
249    changeMode(newpcbb == idleProcess ? idle : kernel, xc);
250}
251
252void
253Statistics::callpal(int code, ExecContext *xc)
254{
255    if (!PAL::name(code))
256        return;
257
258    _callpal[code]++;
259
260    switch (code) {
261      case PAL::callsys: {
262          int number = xc->readIntReg(0);
263          if (SystemCalls<Tru64>::validSyscallNumber(number)) {
264              int cvtnum = SystemCalls<Tru64>::convert(number);
265              _syscall[cvtnum]++;
266          }
267      } break;
268
269      case PAL::swpctx:
270        if (xc->getSystemPtr()->kernelBinning)
271            xc->getSystemPtr()->kernelBinning->palSwapContext(xc);
272        break;
273    }
274}
275
276void
277Statistics::serialize(ostream &os)
278{
279    int exemode = themode;
280    SERIALIZE_SCALAR(exemode);
281    SERIALIZE_SCALAR(idleProcess);
282    SERIALIZE_SCALAR(iplLast);
283    SERIALIZE_SCALAR(iplLastTick);
284    SERIALIZE_SCALAR(lastModeTick);
285}
286
287void
288Statistics::unserialize(Checkpoint *cp, const string &section)
289{
290    int exemode;
291    UNSERIALIZE_SCALAR(exemode);
292    UNSERIALIZE_SCALAR(idleProcess);
293    UNSERIALIZE_SCALAR(iplLast);
294    UNSERIALIZE_SCALAR(iplLastTick);
295    UNSERIALIZE_SCALAR(lastModeTick);
296    themode = (cpu_mode)exemode;
297}
298
299/* end namespace Kernel */ }
300