kernel_stats.cc revision 1097 
1/*
2 * Copyright (c) 2003 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 "base/statistics.hh"
36#include "base/stats/bin.hh"
37#include "cpu/exec_context.hh"
38#include "cpu/pc_event.hh"
39#include "cpu/static_inst.hh"
40#include "kern/kernel_stats.hh"
41#include "kern/linux/linux_syscalls.hh"
42
43using namespace std;
44using namespace Stats;
45
46namespace Kernel {
47
48const char *modestr[] = { "kernel", "user", "idle", "interrupt" };
49
50Statistics::Statistics(ExecContext *context)
51    : xc(context), idleProcess((Addr)-1), themode(kernel), lastModeTick(0),
52      iplLast(0), iplLastTick(0)
53{
54    bin_int = xc->system->params->bin_int;
55}
56
57void
58Statistics::regStats(const string &_name)
59{
60    myname = _name;
61
62    _arm
63        .name(name() + ".inst.arm")
64        .desc("number of arm instructions executed")
65        ;
66
67    _quiesce
68        .name(name() + ".inst.quiesce")
69        .desc("number of quiesce instructions executed")
70        ;
71
72    _ivlb
73        .name(name() + ".inst.ivlb")
74        .desc("number of ivlb instructions executed")
75        ;
76
77    _ivle
78        .name(name() + ".inst.ivle")
79        .desc("number of ivle instructions executed")
80        ;
81
82    _hwrei
83        .name(name() + ".inst.hwrei")
84        .desc("number of hwrei instructions executed")
85        ;
86
87    _iplCount
88        .init(32)
89        .name(name() + ".ipl_count")
90        .desc("number of times we switched to this ipl")
91        .flags(total | pdf | nozero | nonan)
92        ;
93
94    _iplGood
95        .init(32)
96        .name(name() + ".ipl_good")
97        .desc("number of times we switched to this ipl from a different ipl")
98        .flags(total | pdf | nozero | nonan)
99        ;
100
101    _iplTicks
102        .init(32)
103        .name(name() + ".ipl_ticks")
104        .desc("number of cycles we spent at this ipl")
105        .flags(total | pdf | nozero | nonan)
106        ;
107
108    _iplUsed
109        .name(name() + ".ipl_used")
110        .desc("fraction of swpipl calls that actually changed the ipl")
111        .flags(total | nozero | nonan)
112        ;
113
114    _iplUsed = _iplGood / _iplCount;
115
116    _callpal
117        .init(256)
118        .name(name() + ".callpal")
119        .desc("number of callpals executed")
120        .flags(total | pdf | nozero | nonan)
121        ;
122
123    for (int i = 0; i < PAL::NumCodes; ++i) {
124        const char *str = PAL::name(i);
125        if (str)
126            _callpal.subname(i, str);
127    }
128
129    _syscall
130        .init(SystemCalls<Tru64>::Number)
131        .name(name() + ".syscall")
132        .desc("number of syscalls executed")
133        .flags(total | pdf | nozero | nonan)
134        ;
135
136    for (int i = 0; i < SystemCalls<Tru64>::Number; ++i) {
137        const char *str = SystemCalls<Tru64>::name(i);
138        if (str) {
139            _syscall.subname(i, str);
140        }
141    }
142
143    _faults
144        .init(Num_Faults)
145        .name(name() + ".faults")
146        .desc("number of faults")
147        .flags(total | pdf | nozero | nonan)
148        ;
149
150    for (int i = 1; i < Num_Faults; ++i) {
151        const char *str = FaultName(i);
152        if (str)
153            _faults.subname(i, str);
154    }
155
156    _mode
157        .init(cpu_mode_num)
158        .name(name() + ".mode_switch")
159        .desc("number of protection mode switches")
160        ;
161
162    for (int i = 0; i < cpu_mode_num; ++i)
163        _mode.subname(i, modestr[i]);
164
165    _modeGood
166        .init(cpu_mode_num)
167        .name(name() + ".mode_good")
168        ;
169
170    for (int i = 0; i < cpu_mode_num; ++i)
171        _modeGood.subname(i, modestr[i]);
172
173    _modeFraction
174        .name(name() + ".mode_switch_good")
175        .desc("fraction of useful protection mode switches")
176        .flags(total)
177        ;
178
179    for (int i = 0; i < cpu_mode_num; ++i)
180        _modeFraction.subname(i, modestr[i]);
181
182    _modeFraction = _modeGood / _mode;
183
184    _modeTicks
185        .init(cpu_mode_num)
186        .name(name() + ".mode_ticks")
187        .desc("number of ticks spent at the given mode")
188        .flags(pdf)
189        ;
190    for (int i = 0; i < cpu_mode_num; ++i)
191        _modeTicks.subname(i, modestr[i]);
192
193    _swap_context
194        .name(name() + ".swap_context")
195        .desc("number of times the context was actually changed")
196        ;
197}
198
199void
200Statistics::setIdleProcess(Addr idlepcbb)
201{
202    assert(themode == kernel || themode == interrupt);
203    idleProcess = idlepcbb;
204    themode = idle;
205    changeMode(themode);
206}
207
208void
209Statistics::changeMode(cpu_mode newmode)
210{
211    _mode[newmode]++;
212
213    if (newmode == themode)
214        return;
215
216    DPRINTF(Context, "old mode=%-8s new mode=%-8s\n",
217            modestr[themode], modestr[newmode]);
218
219    _modeGood[newmode]++;
220    _modeTicks[themode] += curTick - lastModeTick;
221
222    xc->system->kernelBinning->changeMode(newmode);
223
224    lastModeTick = curTick;
225    themode = newmode;
226}
227
228void
229Statistics::swpipl(int ipl)
230{
231    assert(ipl >= 0 && ipl <= 0x1f && "invalid IPL\n");
232
233    _iplCount[ipl]++;
234
235    if (ipl == iplLast)
236        return;
237
238    _iplGood[ipl]++;
239    _iplTicks[iplLast] += curTick - iplLastTick;
240    iplLastTick = curTick;
241    iplLast = ipl;
242}
243
244void
245Statistics::mode(cpu_mode newmode)
246{
247    Addr pcbb = xc->regs.ipr[AlphaISA::IPR_PALtemp23];
248
249    if ((newmode == kernel || newmode == interrupt) &&
250            pcbb == idleProcess)
251        newmode = idle;
252
253    if (bin_int == false && newmode == interrupt)
254        newmode = kernel;
255
256    changeMode(newmode);
257}
258
259void
260Statistics::context(Addr oldpcbb, Addr newpcbb)
261{
262    assert(themode != user);
263
264    _swap_context++;
265    changeMode(newpcbb == idleProcess ? idle : kernel);
266}
267
268void
269Statistics::callpal(int code)
270{
271    if (!PAL::name(code))
272        return;
273
274    _callpal[code]++;
275
276    switch (code) {
277      case PAL::callsys: {
278          int number = xc->regs.intRegFile[0];
279          if (SystemCalls<Tru64>::validSyscallNumber(number)) {
280              int cvtnum = SystemCalls<Tru64>::convert(number);
281              _syscall[cvtnum]++;
282          }
283      } break;
284
285      case PAL::swpctx:
286        if (xc->system->kernelBinning)
287            xc->system->kernelBinning->palSwapContext(xc);
288        break;
289    }
290}
291
292void
293Statistics::serialize(ostream &os)
294{
295    int exemode = themode;
296    SERIALIZE_SCALAR(exemode);
297    SERIALIZE_SCALAR(idleProcess);
298    SERIALIZE_SCALAR(iplLast);
299    SERIALIZE_SCALAR(iplLastTick);
300    SERIALIZE_SCALAR(lastModeTick);
301}
302
303void
304Statistics::unserialize(Checkpoint *cp, const string &section)
305{
306    int exemode;
307    UNSERIALIZE_SCALAR(exemode);
308    UNSERIALIZE_SCALAR(idleProcess);
309    UNSERIALIZE_SCALAR(iplLast);
310    UNSERIALIZE_SCALAR(iplLastTick);
311    UNSERIALIZE_SCALAR(lastModeTick);
312    themode = (cpu_mode)exemode;
313}
314
315/* end namespace Kernel */ }
316