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     _hwrei
  72         .name(name() + ".inst.hwrei")
  73         .desc("number of hwrei instructions executed")
  74         ;
  75
  76     _iplCount
  77         .init(32)
  78         .name(name() + ".ipl_count")
  79         .desc("number of times we switched to this ipl")
  80         .flags(total | pdf | nozero | nonan)
  81         ;
  82
  83     _iplGood
  84         .init(32)
  85         .name(name() + ".ipl_good")
  86         .desc("number of times we switched to this ipl from a different ipl")
  87         .flags(total | pdf | nozero | nonan)
  88         ;
  89
  90     _iplTicks
  91         .init(32)
  92         .name(name() + ".ipl_ticks")
  93         .desc("number of cycles we spent at this ipl")
  94         .flags(total | pdf | nozero | nonan)
  95         ;
  96
  97     _iplUsed
  98         .name(name() + ".ipl_used")
  99         .desc("fraction of swpipl calls that actually changed the ipl")
 100         .flags(total | nozero | nonan)
 101         ;
 102
 103     _iplUsed = _iplGood / _iplCount;
 104
 105     _callpal
 106         .init(256)
 107         .name(name() + ".callpal")
 108         .desc("number of callpals executed")
 109         .flags(total | pdf | nozero | nonan)
 110         ;
 111
 112     for (int i = 0; i < PAL::NumCodes; ++i) {
 113         const char *str = PAL::name(i);
 114         if (str)
 115             _callpal.subname(i, str);
 116     }
 117
 118     _syscall
 119         .init(SystemCalls<Tru64>::Number)
 120         .name(name() + ".syscall")
 121         .desc("number of syscalls executed")
 122         .flags(total | pdf | nozero | nonan)
 123         ;
 124
 125     for (int i = 0; i < SystemCalls<Tru64>::Number; ++i) {
 126         const char *str = SystemCalls<Tru64>::name(i);
 127         if (str) {
 128             _syscall.subname(i, str);
 129         }
 130     }
 131
 132     _mode
 133         .init(cpu_mode_num)
 134         .name(name() + ".mode_switch")
 135         .desc("number of protection mode switches")
 136         ;
 137
 138     for (int i = 0; i < cpu_mode_num; ++i)
 139         _mode.subname(i, modestr[i]);
 140
 141     _modeGood
 142         .init(cpu_mode_num)
 143         .name(name() + ".mode_good")
 144         ;
 145
 146     for (int i = 0; i < cpu_mode_num; ++i)
 147         _modeGood.subname(i, modestr[i]);
 148
 149     _modeFraction
 150         .name(name() + ".mode_switch_good")
 151         .desc("fraction of useful protection mode switches")
 152         .flags(total)
 153         ;
 154
 155     for (int i = 0; i < cpu_mode_num; ++i)
 156         _modeFraction.subname(i, modestr[i]);
 157
 158     _modeFraction = _modeGood / _mode;
 159
 160     _modeTicks
 161         .init(cpu_mode_num)
 162         .name(name() + ".mode_ticks")
 163         .desc("number of ticks spent at the given mode")
 164         .flags(pdf)
 165         ;
 166     for (int i = 0; i < cpu_mode_num; ++i)
 167         _modeTicks.subname(i, modestr[i]);
 168
 169     _swap_context
 170         .name(name() + ".swap_context")
 171         .desc("number of times the context was actually changed")
 172         ;
 173 }
 174
 175 void
 176 Statistics::setIdleProcess(Addr idlepcbb, ThreadContext *tc)
 177 {
 178     assert(themode == kernel);
 179     idleProcess = idlepcbb;
 180     themode = idle;
 181     changeMode(themode, tc);
 182 }
 183
 184 void
 185 Statistics::changeMode(cpu_mode newmode, ThreadContext *tc)
 186 {
 187     _mode[newmode]++;
 188
 189     if (newmode == themode)
 190         return;
 191
 192     DPRINTF(Context, "old mode=%-8s new mode=%-8s\n",
 193             modestr[themode], modestr[newmode]);
 194
 195     _modeGood[newmode]++;
 196     _modeTicks[themode] += curTick - lastModeTick;
 197
 198     lastModeTick = curTick;
 199     themode = newmode;
 200 }
 201
 202 void
 203 Statistics::swpipl(int ipl)
 204 {
 205     assert(ipl >= 0 && ipl <= 0x1f && "invalid IPL\n");
 206
 207     _iplCount[ipl]++;
 208
 209     if (ipl == iplLast)
 210         return;
 211
 212     _iplGood[ipl]++;
 213     _iplTicks[iplLast] += curTick - iplLastTick;
 214     iplLastTick = curTick;
 215     iplLast = ipl;
 216 }
 217
 218 void
 219 Statistics::mode(cpu_mode newmode, ThreadContext *tc)
 220 {
 221     Addr pcbb = tc->readMiscReg(AlphaISA::IPR_PALtemp23);
 222
 223     if (newmode == kernel && pcbb == idleProcess)
 224         newmode = idle;
 225
 226     changeMode(newmode, tc);
 227 }
 228
 229 void
 230 Statistics::context(Addr oldpcbb, Addr newpcbb, ThreadContext *tc)
 231 {
 232     assert(themode != user);
 233
 234     _swap_context++;
 235     changeMode(newpcbb == idleProcess ? idle : kernel, tc);
 236 }
 237
 238 void
 239 Statistics::callpal(int code, ThreadContext *tc)
 240 {
 241     if (!PAL::name(code))
 242         return;
 243
 244     _callpal[code]++;
 245
 246     switch (code) {
 247       case PAL::callsys: {
 248           int number = tc->readIntReg(0);
 249           if (SystemCalls<Tru64>::validSyscallNumber(number)) {
 250               int cvtnum = SystemCalls<Tru64>::convert(number);
 251               _syscall[cvtnum]++;
 252           }
 253       } break;
 254     }
 255 }
 256
 257 void
 258 Statistics::serialize(ostream &os)
 259 {
 260     int exemode = themode;
 261     SERIALIZE_SCALAR(exemode);
 262     SERIALIZE_SCALAR(idleProcess);
 263     SERIALIZE_SCALAR(iplLast);
 264     SERIALIZE_SCALAR(iplLastTick);
 265     SERIALIZE_SCALAR(lastModeTick);
 266 }
 267
 268 void
 269 Statistics::unserialize(Checkpoint *cp, const string &section)
 270 {
 271     int exemode;
 272     UNSERIALIZE_SCALAR(exemode);
 273     UNSERIALIZE_SCALAR(idleProcess);
 274     UNSERIALIZE_SCALAR(iplLast);
 275     UNSERIALIZE_SCALAR(iplLastTick);
 276     UNSERIALIZE_SCALAR(lastModeTick);
 277     themode = (cpu_mode)exemode;
 278 }
 279
 280 /* end namespace Kernel */ }