src/kern/kernel_stats.cc

   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/thread_context.hh"
  39 #include "kern/kernel_stats.hh"
  40 #include "kern/tru64/tru64_syscalls.hh"
  41 #include "sim/system.hh"
  42
  43 using namespace std;
  44 using namespace Stats;
  45
  46 namespace Kernel {
  47
  48 const char *modestr[] = { "kernel", "user", "idle" };
  49
  50 Statistics::Statistics(System *system)
  51     : idleProcess((Addr)-1), themode(kernel), lastModeTick(0),
  52       iplLast(0), iplLastTick(0)
  53 {
  54 }
  55
  56 void
  57 Statistics::regStats(const string &_name)
  58 {
  59     myname = _name;
  60
  61     _arm
  62         .name(name() + ".inst.arm")
  63         .desc("number of arm instructions executed")
  64         ;
  65
  66     _quiesce
  67         .name(name() + ".inst.quiesce")
  68         .desc("number of quiesce instructions executed")
  69         ;
  70
  71     _ivlb
  72         .name(name() + ".inst.ivlb")
  73         .desc("number of ivlb instructions executed")
  74         ;
  75
  76     _ivle
  77         .name(name() + ".inst.ivle")
  78         .desc("number of ivle instructions executed")
  79         ;
  80
  81     _hwrei
  82         .name(name() + ".inst.hwrei")
  83         .desc("number of hwrei instructions executed")
  84         ;
  85
  86     _iplCount
  87         .init(32)
  88         .name(name() + ".ipl_count")
  89         .desc("number of times we switched to this ipl")
  90         .flags(total | pdf | nozero | nonan)
  91         ;
  92
  93     _iplGood
  94         .init(32)
  95         .name(name() + ".ipl_good")
  96         .desc("number of times we switched to this ipl from a different ipl")
  97         .flags(total | pdf | nozero | nonan)
  98         ;
  99
 100     _iplTicks
 101         .init(32)
 102         .name(name() + ".ipl_ticks")
 103         .desc("number of cycles we spent at this ipl")
 104         .flags(total | pdf | nozero | nonan)
 105         ;
 106
 107     _iplUsed
 108         .name(name() + ".ipl_used")
 109         .desc("fraction of swpipl calls that actually changed the ipl")
 110         .flags(total | nozero | nonan)
 111         ;
 112
 113     _iplUsed = _iplGood / _iplCount;
 114
 115     _callpal
 116         .init(256)
 117         .name(name() + ".callpal")
 118         .desc("number of callpals executed")
 119         .flags(total | pdf | nozero | nonan)
 120         ;
 121
 122     for (int i = 0; i < PAL::NumCodes; ++i) {
 123         const char *str = PAL::name(i);
 124         if (str)
 125             _callpal.subname(i, str);
 126     }
 127
 128     _syscall
 129         .init(SystemCalls<Tru64>::Number)
 130         .name(name() + ".syscall")
 131         .desc("number of syscalls executed")
 132         .flags(total | pdf | nozero | nonan)
 133         ;
 134
 135     for (int i = 0; i < SystemCalls<Tru64>::Number; ++i) {
 136         const char *str = SystemCalls<Tru64>::name(i);
 137         if (str) {
 138             _syscall.subname(i, str);
 139         }
 140     }
 141
 142     _mode
 143         .init(cpu_mode_num)
 144         .name(name() + ".mode_switch")
 145         .desc("number of protection mode switches")
 146         ;
 147
 148     for (int i = 0; i < cpu_mode_num; ++i)
 149         _mode.subname(i, modestr[i]);
 150
 151     _modeGood
 152         .init(cpu_mode_num)
 153         .name(name() + ".mode_good")
 154         ;
 155
 156     for (int i = 0; i < cpu_mode_num; ++i)
 157         _modeGood.subname(i, modestr[i]);
 158
 159     _modeFraction
 160         .name(name() + ".mode_switch_good")
 161         .desc("fraction of useful protection mode switches")
 162         .flags(total)
 163         ;
 164
 165     for (int i = 0; i < cpu_mode_num; ++i)
 166         _modeFraction.subname(i, modestr[i]);
 167
 168     _modeFraction = _modeGood / _mode;
 169
 170     _modeTicks
 171         .init(cpu_mode_num)
 172         .name(name() + ".mode_ticks")
 173         .desc("number of ticks spent at the given mode")
 174         .flags(pdf)
 175         ;
 176     for (int i = 0; i < cpu_mode_num; ++i)
 177         _modeTicks.subname(i, modestr[i]);
 178
 179     _swap_context
 180         .name(name() + ".swap_context")
 181         .desc("number of times the context was actually changed")
 182         ;
 183 }
 184
 185 void
 186 Statistics::setIdleProcess(Addr idlepcbb, ThreadContext *tc)
 187 {
 188     assert(themode == kernel);
 189     idleProcess = idlepcbb;
 190     themode = idle;
 191     changeMode(themode, tc);
 192 }
 193
 194 void
 195 Statistics::changeMode(cpu_mode newmode, ThreadContext *tc)
 196 {
 197     _mode[newmode]++;
 198
 199     if (newmode == themode)
 200         return;
 201
 202     DPRINTF(Context, "old mode=%-8s new mode=%-8s\n",
 203             modestr[themode], modestr[newmode]);
 204
 205     _modeGood[newmode]++;
 206     _modeTicks[themode] += curTick - lastModeTick;
 207
 208     lastModeTick = curTick;
 209     themode = newmode;
 210 }
 211
 212 void
 213 Statistics::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
 228 void
 229 Statistics::mode(cpu_mode newmode, ThreadContext *tc)
 230 {
 231     Addr pcbb = tc->readMiscReg(AlphaISA::IPR_PALtemp23);
 232
 233     if (newmode == kernel && pcbb == idleProcess)
 234         newmode = idle;
 235
 236     changeMode(newmode, tc);
 237 }
 238
 239 void
 240 Statistics::context(Addr oldpcbb, Addr newpcbb, ThreadContext *tc)
 241 {
 242     assert(themode != user);
 243
 244     _swap_context++;
 245     changeMode(newpcbb == idleProcess ? idle : kernel, tc);
 246 }
 247
 248 void
 249 Statistics::callpal(int code, ThreadContext *tc)
 250 {
 251     if (!PAL::name(code))
 252         return;
 253
 254     _callpal[code]++;
 255
 256     switch (code) {
 257       case PAL::callsys: {
 258           int number = tc->readIntReg(0);
 259           if (SystemCalls<Tru64>::validSyscallNumber(number)) {
 260               int cvtnum = SystemCalls<Tru64>::convert(number);
 261               _syscall[cvtnum]++;
 262           }
 263       } break;
 264     }
 265 }
 266
 267 void
 268 Statistics::serialize(ostream &os)
 269 {
 270     int exemode = themode;
 271     SERIALIZE_SCALAR(exemode);
 272     SERIALIZE_SCALAR(idleProcess);
 273     SERIALIZE_SCALAR(iplLast);
 274     SERIALIZE_SCALAR(iplLastTick);
 275     SERIALIZE_SCALAR(lastModeTick);
 276 }
 277
 278 void
 279 Statistics::unserialize(Checkpoint *cp, const string &section)
 280 {
 281     int exemode;
 282     UNSERIALIZE_SCALAR(exemode);
 283     UNSERIALIZE_SCALAR(idleProcess);
 284     UNSERIALIZE_SCALAR(iplLast);
 285     UNSERIALIZE_SCALAR(iplLastTick);
 286     UNSERIALIZE_SCALAR(lastModeTick);
 287     themode = (cpu_mode)exemode;
 288 }
 289
 290 /* end namespace Kernel */ }