kernel_stats.cc revision 2159 
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
39using namespace std;
40using namespace Stats;
41
42namespace Kernel {
43
44const char *modestr[] = { "kernel", "user", "idle", "interrupt" };
45
46Statistics::Statistics(ExecContext *context)
47    : xc(context), idleProcess((Addr)-1), themode(kernel), lastModeTick(0),
48      iplLast(0), iplLastTick(0)
49{
50    bin_int = xc->system->params->bin_int;
51}
52
53void
54Statistics::regStats(const string &_name)
55{
56    myname = _name;
57
58    _arm
59        .name(name() + ".inst.arm")
60        .desc("number of arm instructions executed")
61        ;
62
63    _quiesce
64        .name(name() + ".inst.quiesce")
65        .desc("number of quiesce instructions executed")
66        ;
67
68    _ivlb
69        .name(name() + ".inst.ivlb")
70        .desc("number of ivlb instructions executed")
71        ;
72
73    _ivle
74        .name(name() + ".inst.ivle")
75        .desc("number of ivle instructions executed")
76        ;
77
78    _hwrei
79        .name(name() + ".inst.hwrei")
80        .desc("number of hwrei instructions executed")
81        ;
82
83    _iplCount
84        .init(32)
85        .name(name() + ".ipl_count")
86        .desc("number of times we switched to this ipl")
87        .flags(total | pdf | nozero | nonan)
88        ;
89
90    _iplGood
91        .init(32)
92        .name(name() + ".ipl_good")
93        .desc("number of times we switched to this ipl from a different ipl")
94        .flags(total | pdf | nozero | nonan)
95        ;
96
97    _iplTicks
98        .init(32)
99        .name(name() + ".ipl_ticks")
100        .desc("number of cycles we spent at this ipl")
101        .flags(total | pdf | nozero | nonan)
102        ;
103
104    _iplUsed
105        .name(name() + ".ipl_used")
106        .desc("fraction of swpipl calls that actually changed the ipl")
107        .flags(total | nozero | nonan)
108        ;
109
110    _iplUsed = _iplGood / _iplCount;
111
112    _callpal
113        .init(256)
114        .name(name() + ".callpal")
115        .desc("number of callpals executed")
116        .flags(total | pdf | nozero | nonan)
117        ;
118
119    for (int i = 0; i < PAL::NumCodes; ++i) {
120        const char *str = PAL::name(i);
121        if (str)
122            _callpal.subname(i, str);
123    }
124
125    _syscall
126        .init(SystemCalls<Tru64>::Number)
127        .name(name() + ".syscall")
128        .desc("number of syscalls executed")
129        .flags(total | pdf | nozero | nonan)
130        ;
131
132    for (int i = 0; i < SystemCalls<Tru64>::Number; ++i) {
133        const char *str = SystemCalls<Tru64>::name(i);
134        if (str) {
135            _syscall.subname(i, str);
136        }
137    }
138
139    _faults
140        .init(NumFaults)
141        .name(name() + ".faults")
142        .desc("number of faults")
143        .flags(total | pdf | nozero | nonan)
144        ;
145
146    for (int i = 1; i < NumFaults; ++i) {
147        const char *str = (*ListOfFaults[i])->name;
148        if (str)
149            _faults.subname(i, str);
150    }
151
152    _mode
153        .init(cpu_mode_num)
154        .name(name() + ".mode_switch")
155        .desc("number of protection mode switches")
156        ;
157
158    for (int i = 0; i < cpu_mode_num; ++i)
159        _mode.subname(i, modestr[i]);
160
161    _modeGood
162        .init(cpu_mode_num)
163        .name(name() + ".mode_good")
164        ;
165
166    for (int i = 0; i < cpu_mode_num; ++i)
167        _modeGood.subname(i, modestr[i]);
168
169    _modeFraction
170        .name(name() + ".mode_switch_good")
171        .desc("fraction of useful protection mode switches")
172        .flags(total)
173        ;
174
175    for (int i = 0; i < cpu_mode_num; ++i)
176        _modeFraction.subname(i, modestr[i]);
177
178    _modeFraction = _modeGood / _mode;
179
180    _modeTicks
181        .init(cpu_mode_num)
182        .name(name() + ".mode_ticks")
183        .desc("number of ticks spent at the given mode")
184        .flags(pdf)
185        ;
186    for (int i = 0; i < cpu_mode_num; ++i)
187        _modeTicks.subname(i, modestr[i]);
188
189    _swap_context
190        .name(name() + ".swap_context")
191        .desc("number of times the context was actually changed")
192        ;
193}
194
195void
196Statistics::setIdleProcess(Addr idlepcbb)
197{
198    assert(themode == kernel || themode == interrupt);
199    idleProcess = idlepcbb;
200    themode = idle;
201    changeMode(themode);
202}
203
204void
205Statistics::changeMode(cpu_mode newmode)
206{
207    _mode[newmode]++;
208
209    if (newmode == themode)
210        return;
211
212    DPRINTF(Context, "old mode=%-8s new mode=%-8s\n",
213            modestr[themode], modestr[newmode]);
214
215    _modeGood[newmode]++;
216    _modeTicks[themode] += curTick - lastModeTick;
217
218    xc->system->kernelBinning->changeMode(newmode);
219
220    lastModeTick = curTick;
221    themode = newmode;
222}
223
224void
225Statistics::swpipl(int ipl)
226{
227    assert(ipl >= 0 && ipl <= 0x1f && "invalid IPL\n");
228
229    _iplCount[ipl]++;
230
231    if (ipl == iplLast)
232        return;
233
234    _iplGood[ipl]++;
235    _iplTicks[iplLast] += curTick - iplLastTick;
236    iplLastTick = curTick;
237    iplLast = ipl;
238}
239
240void
241Statistics::mode(cpu_mode newmode)
242{
243    Addr pcbb = xc->readMiscReg(AlphaISA::IPR_PALtemp23);
244
245    if ((newmode == kernel || newmode == interrupt) &&
246            pcbb == idleProcess)
247        newmode = idle;
248
249    if (bin_int == false && newmode == interrupt)
250        newmode = kernel;
251
252    changeMode(newmode);
253}
254
255void
256Statistics::context(Addr oldpcbb, Addr newpcbb)
257{
258    assert(themode != user);
259
260    _swap_context++;
261    changeMode(newpcbb == idleProcess ? idle : kernel);
262}
263
264void
265Statistics::callpal(int code)
266{
267    if (!PAL::name(code))
268        return;
269
270    _callpal[code]++;
271
272    switch (code) {
273      case PAL::callsys: {
274          int number = xc->regs.intRegFile[0];
275          if (SystemCalls<Tru64>::validSyscallNumber(number)) {
276              int cvtnum = SystemCalls<Tru64>::convert(number);
277              _syscall[cvtnum]++;
278          }
279      } break;
280
281      case PAL::swpctx:
282        if (xc->system->kernelBinning)
283            xc->system->kernelBinning->palSwapContext(xc);
284        break;
285    }
286}
287
288void
289Statistics::serialize(ostream &os)
290{
291    int exemode = themode;
292    SERIALIZE_SCALAR(exemode);
293    SERIALIZE_SCALAR(idleProcess);
294    SERIALIZE_SCALAR(iplLast);
295    SERIALIZE_SCALAR(iplLastTick);
296    SERIALIZE_SCALAR(lastModeTick);
297}
298
299void
300Statistics::unserialize(Checkpoint *cp, const string &section)
301{
302    int exemode;
303    UNSERIALIZE_SCALAR(exemode);
304    UNSERIALIZE_SCALAR(idleProcess);
305    UNSERIALIZE_SCALAR(iplLast);
306    UNSERIALIZE_SCALAR(iplLastTick);
307    UNSERIALIZE_SCALAR(lastModeTick);
308    themode = (cpu_mode)exemode;
309}
310
311/* end namespace Kernel */ }
312