kernel_stats.cc revision 2235 
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/*    _faults
141        .init(NumFaults)
142        .name(name() + ".faults")
143        .desc("number of faults")
144        .flags(total | pdf | nozero | nonan)
145        ;
146
147    for (int i = 1; i < NumFaults; ++i) {
148        const char *str = (*ListOfFaults[i])->name;
149        if (str)
150            _faults.subname(i, str);
151    }*/
152
153    _mode
154        .init(cpu_mode_num)
155        .name(name() + ".mode_switch")
156        .desc("number of protection mode switches")
157        ;
158
159    for (int i = 0; i < cpu_mode_num; ++i)
160        _mode.subname(i, modestr[i]);
161
162    _modeGood
163        .init(cpu_mode_num)
164        .name(name() + ".mode_good")
165        ;
166
167    for (int i = 0; i < cpu_mode_num; ++i)
168        _modeGood.subname(i, modestr[i]);
169
170    _modeFraction
171        .name(name() + ".mode_switch_good")
172        .desc("fraction of useful protection mode switches")
173        .flags(total)
174        ;
175
176    for (int i = 0; i < cpu_mode_num; ++i)
177        _modeFraction.subname(i, modestr[i]);
178
179    _modeFraction = _modeGood / _mode;
180
181    _modeTicks
182        .init(cpu_mode_num)
183        .name(name() + ".mode_ticks")
184        .desc("number of ticks spent at the given mode")
185        .flags(pdf)
186        ;
187    for (int i = 0; i < cpu_mode_num; ++i)
188        _modeTicks.subname(i, modestr[i]);
189
190    _swap_context
191        .name(name() + ".swap_context")
192        .desc("number of times the context was actually changed")
193        ;
194}
195
196void
197Statistics::setIdleProcess(Addr idlepcbb, ExecContext *xc)
198{
199    assert(themode == kernel || themode == interrupt);
200    idleProcess = idlepcbb;
201    themode = idle;
202    changeMode(themode, xc);
203}
204
205void
206Statistics::changeMode(cpu_mode newmode, ExecContext *xc)
207{
208    _mode[newmode]++;
209
210    if (newmode == themode)
211        return;
212
213    DPRINTF(Context, "old mode=%-8s new mode=%-8s\n",
214            modestr[themode], modestr[newmode]);
215
216    _modeGood[newmode]++;
217    _modeTicks[themode] += curTick - lastModeTick;
218
219    xc->getSystemPtr()->kernelBinning->changeMode(newmode);
220
221    lastModeTick = curTick;
222    themode = newmode;
223}
224
225void
226Statistics::swpipl(int ipl)
227{
228    assert(ipl >= 0 && ipl <= 0x1f && "invalid IPL\n");
229
230    _iplCount[ipl]++;
231
232    if (ipl == iplLast)
233        return;
234
235    _iplGood[ipl]++;
236    _iplTicks[iplLast] += curTick - iplLastTick;
237    iplLastTick = curTick;
238    iplLast = ipl;
239}
240
241void
242Statistics::mode(cpu_mode newmode, ExecContext *xc)
243{
244    Addr pcbb = xc->readMiscReg(AlphaISA::IPR_PALtemp23);
245
246    if ((newmode == kernel || newmode == interrupt) &&
247            pcbb == idleProcess)
248        newmode = idle;
249
250    if (bin_int == false && newmode == interrupt)
251        newmode = kernel;
252
253    changeMode(newmode, xc);
254}
255
256void
257Statistics::context(Addr oldpcbb, Addr newpcbb, ExecContext *xc)
258{
259    assert(themode != user);
260
261    _swap_context++;
262    changeMode(newpcbb == idleProcess ? idle : kernel, xc);
263}
264
265void
266Statistics::callpal(int code, ExecContext *xc)
267{
268    if (!PAL::name(code))
269        return;
270
271    _callpal[code]++;
272
273    switch (code) {
274      case PAL::callsys: {
275          int number = xc->readIntReg(0);
276          if (SystemCalls<Tru64>::validSyscallNumber(number)) {
277              int cvtnum = SystemCalls<Tru64>::convert(number);
278              _syscall[cvtnum]++;
279          }
280      } break;
281
282      case PAL::swpctx:
283        if (xc->getSystemPtr()->kernelBinning)
284            xc->getSystemPtr()->kernelBinning->palSwapContext(xc);
285        break;
286    }
287}
288
289void
290Statistics::serialize(ostream &os)
291{
292    int exemode = themode;
293    SERIALIZE_SCALAR(exemode);
294    SERIALIZE_SCALAR(idleProcess);
295    SERIALIZE_SCALAR(iplLast);
296    SERIALIZE_SCALAR(iplLastTick);
297    SERIALIZE_SCALAR(lastModeTick);
298}
299
300void
301Statistics::unserialize(Checkpoint *cp, const string &section)
302{
303    int exemode;
304    UNSERIALIZE_SCALAR(exemode);
305    UNSERIALIZE_SCALAR(idleProcess);
306    UNSERIALIZE_SCALAR(iplLast);
307    UNSERIALIZE_SCALAR(iplLastTick);
308    UNSERIALIZE_SCALAR(lastModeTick);
309    themode = (cpu_mode)exemode;
310}
311
312/* end namespace Kernel */ }
313