kern/kernel_stats.cc

   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
  43 using namespace std;
  44 using namespace Stats;
  45
  46 namespace Kernel {
  47
  48 const char *modestr[] = { "kernel", "user", "idle", "interrupt" };
  49
  50 Statistics::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
  57 void
  58 Statistics::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
 199 void
 200 Statistics::setIdleProcess(Addr idlepcbb)
 201 {
 202     assert(themode == kernel || themode == interrupt);
 203     idleProcess = idlepcbb;
 204     themode = idle;
 205     changeMode(themode);
 206 }
 207
 208 void
 209 Statistics::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
 228 void
 229 Statistics::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
 244 void
 245 Statistics::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
 259 void
 260 Statistics::context(Addr oldpcbb, Addr newpcbb)
 261 {
 262     assert(themode != user);
 263
 264     _swap_context++;
 265     changeMode(newpcbb == idleProcess ? idle : kernel);
 266 }
 267
 268 void
 269 Statistics::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
 292 void
 293 Statistics::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
 303 void
 304 Statistics::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 */ }