kernel_stats.cc revision 2665:a124942bacb8 
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/exec_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", "interrupt" };
49
50Statistics::Statistics(System *system)
51    : idleProcess((Addr)-1), themode(kernel), lastModeTick(0),
52      iplLast(0), iplLastTick(0)
53{
54    bin_int = 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    _mode
144        .init(cpu_mode_num)
145        .name(name() + ".mode_switch")
146        .desc("number of protection mode switches")
147        ;
148
149    for (int i = 0; i < cpu_mode_num; ++i)
150        _mode.subname(i, modestr[i]);
151
152    _modeGood
153        .init(cpu_mode_num)
154        .name(name() + ".mode_good")
155        ;
156
157    for (int i = 0; i < cpu_mode_num; ++i)
158        _modeGood.subname(i, modestr[i]);
159
160    _modeFraction
161        .name(name() + ".mode_switch_good")
162        .desc("fraction of useful protection mode switches")
163        .flags(total)
164        ;
165
166    for (int i = 0; i < cpu_mode_num; ++i)
167        _modeFraction.subname(i, modestr[i]);
168
169    _modeFraction = _modeGood / _mode;
170
171    _modeTicks
172        .init(cpu_mode_num)
173        .name(name() + ".mode_ticks")
174        .desc("number of ticks spent at the given mode")
175        .flags(pdf)
176        ;
177    for (int i = 0; i < cpu_mode_num; ++i)
178        _modeTicks.subname(i, modestr[i]);
179
180    _swap_context
181        .name(name() + ".swap_context")
182        .desc("number of times the context was actually changed")
183        ;
184}
185
186void
187Statistics::setIdleProcess(Addr idlepcbb, ExecContext *xc)
188{
189    assert(themode == kernel || themode == interrupt);
190    idleProcess = idlepcbb;
191    themode = idle;
192    changeMode(themode, xc);
193}
194
195void
196Statistics::changeMode(cpu_mode newmode, ExecContext *xc)
197{
198    _mode[newmode]++;
199
200    if (newmode == themode)
201        return;
202
203    DPRINTF(Context, "old mode=%-8s new mode=%-8s\n",
204            modestr[themode], modestr[newmode]);
205
206    _modeGood[newmode]++;
207    _modeTicks[themode] += curTick - lastModeTick;
208
209    xc->getSystemPtr()->kernelBinning->changeMode(newmode);
210
211    lastModeTick = curTick;
212    themode = newmode;
213}
214
215void
216Statistics::swpipl(int ipl)
217{
218    assert(ipl >= 0 && ipl <= 0x1f && "invalid IPL\n");
219
220    _iplCount[ipl]++;
221
222    if (ipl == iplLast)
223        return;
224
225    _iplGood[ipl]++;
226    _iplTicks[iplLast] += curTick - iplLastTick;
227    iplLastTick = curTick;
228    iplLast = ipl;
229}
230
231void
232Statistics::mode(cpu_mode newmode, ExecContext *xc)
233{
234    Addr pcbb = xc->readMiscReg(AlphaISA::IPR_PALtemp23);
235
236    if ((newmode == kernel || newmode == interrupt) &&
237            pcbb == idleProcess)
238        newmode = idle;
239
240    if (bin_int == false && newmode == interrupt)
241        newmode = kernel;
242
243    changeMode(newmode, xc);
244}
245
246void
247Statistics::context(Addr oldpcbb, Addr newpcbb, ExecContext *xc)
248{
249    assert(themode != user);
250
251    _swap_context++;
252    changeMode(newpcbb == idleProcess ? idle : kernel, xc);
253}
254
255void
256Statistics::callpal(int code, ExecContext *xc)
257{
258    if (!PAL::name(code))
259        return;
260
261    _callpal[code]++;
262
263    switch (code) {
264      case PAL::callsys: {
265          int number = xc->readIntReg(0);
266          if (SystemCalls<Tru64>::validSyscallNumber(number)) {
267              int cvtnum = SystemCalls<Tru64>::convert(number);
268              _syscall[cvtnum]++;
269          }
270      } break;
271
272      case PAL::swpctx:
273        if (xc->getSystemPtr()->kernelBinning)
274            xc->getSystemPtr()->kernelBinning->palSwapContext(xc);
275        break;
276    }
277}
278
279void
280Statistics::serialize(ostream &os)
281{
282    int exemode = themode;
283    SERIALIZE_SCALAR(exemode);
284    SERIALIZE_SCALAR(idleProcess);
285    SERIALIZE_SCALAR(iplLast);
286    SERIALIZE_SCALAR(iplLastTick);
287    SERIALIZE_SCALAR(lastModeTick);
288}
289
290void
291Statistics::unserialize(Checkpoint *cp, const string &section)
292{
293    int exemode;
294    UNSERIALIZE_SCALAR(exemode);
295    UNSERIALIZE_SCALAR(idleProcess);
296    UNSERIALIZE_SCALAR(iplLast);
297    UNSERIALIZE_SCALAR(iplLastTick);
298    UNSERIALIZE_SCALAR(lastModeTick);
299    themode = (cpu_mode)exemode;
300}
301
302/* end namespace Kernel */ }
303