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 "base/statistics.hh"
  34 #include "base/trace.hh"
  35 #include "cpu/exec_context.hh"
  36 #include "kern/kernel_stats.hh"
  37 #include "sim/stats.hh"
  38 #include "sim/sw_context.hh"
  39 #include "targetarch/isa_traits.hh"
  40 #include "targetarch/osfpal.hh"
  41 #include "targetarch/syscalls.hh"
  42
  43 using namespace std;
  44 using namespace Stats;
  45
  46 class KSData
  47 {
  48   private:
  49     string _name;
  50     ExecContext *xc;
  51     BaseCPU *cpu;
  52
  53   public:
  54     KSData(ExecContext *_xc, BaseCPU *_cpu)
  55         : xc(_xc), cpu(_cpu), iplLast(0), iplLastTick(0), lastUser(false),
  56           lastModeTick(0)
  57     {}
  58
  59     const string &name() { return _name; }
  60     void regStats(const string &name);
  61
  62   public:
  63     Scalar<> _arm;
  64     Scalar<> _quiesce;
  65     Scalar<> _ivlb;
  66     Scalar<> _ivle;
  67     Scalar<> _hwrei;
  68
  69     Vector<> _iplCount;
  70     Vector<> _iplGood;
  71     Vector<> _iplTicks;
  72     Formula _iplUsed;
  73
  74     Vector<> _callpal;
  75     Vector<> _syscall;
  76     Vector<> _faults;
  77
  78     Vector<> _mode;
  79     Vector<> _modeGood;
  80     Formula _modeFraction;
  81     Vector<> _modeTicks;
  82
  83     Scalar<> _swap_context;
  84
  85   private:
  86     int iplLast;
  87     Tick iplLastTick;
  88
  89     bool lastUser;
  90     Tick lastModeTick;
  91
  92   public:
  93     void swpipl(int ipl);
  94     void mode(bool user);
  95     void callpal(int code);
  96 };
  97
  98 KernelStats::KernelStats(ExecContext *xc, BaseCPU *cpu)
  99 { data = new KSData(xc, cpu); }
 100
 101 KernelStats::~KernelStats()
 102 { delete data; }
 103
 104 void
 105 KernelStats::regStats(const string &name)
 106 { data->regStats(name); }
 107
 108 void
 109 KSData::regStats(const string &name)
 110 {
 111     _name = name;
 112
 113     _arm
 114         .name(name + ".inst.arm")
 115         .desc("number of arm instructions executed")
 116         ;
 117
 118     _quiesce
 119         .name(name + ".inst.quiesce")
 120         .desc("number of quiesce instructions executed")
 121         ;
 122
 123     _ivlb
 124         .name(name + ".inst.ivlb")
 125         .desc("number of ivlb instructions executed")
 126         ;
 127
 128     _ivle
 129         .name(name + ".inst.ivle")
 130         .desc("number of ivle instructions executed")
 131         ;
 132
 133     _hwrei
 134         .name(name + ".inst.hwrei")
 135         .desc("number of hwrei instructions executed")
 136         ;
 137
 138     _iplCount
 139         .init(32)
 140         .name(name + ".ipl_count")
 141         .desc("number of times we switched to this ipl")
 142         .flags(total | pdf | nozero | nonan)
 143         ;
 144
 145     _iplGood
 146         .init(32)
 147         .name(name + ".ipl_good")
 148         .desc("number of times we switched to this ipl from a different ipl")
 149         .flags(total | pdf | nozero | nonan)
 150         ;
 151
 152     _iplTicks
 153         .init(32)
 154         .name(name + ".ipl_ticks")
 155         .desc("number of cycles we spent at this ipl")
 156         .flags(total | pdf | nozero | nonan)
 157         ;
 158
 159     _iplUsed
 160         .name(name + ".ipl_used")
 161         .desc("fraction of swpipl calls that actually changed the ipl")
 162         .flags(total | nozero | nonan)
 163         ;
 164
 165     _iplUsed = _iplGood / _iplCount;
 166
 167     _callpal
 168         .init(256)
 169         .name(name + ".callpal")
 170         .desc("number of callpals executed")
 171         .flags(total | pdf | nozero | nonan)
 172         ;
 173
 174     for (int i = 0; i < PAL::NumCodes; ++i) {
 175         const char *str = PAL::name(i);
 176         if (str)
 177             _callpal.subname(i, str);
 178     }
 179
 180     _syscall
 181         .init(SystemCalls<Tru64>::Number)
 182         .name(name + ".syscall")
 183         .desc("number of syscalls executed")
 184         .flags(total | pdf | nozero | nonan)
 185         ;
 186
 187     for (int i = 0; i < SystemCalls<Tru64>::Number; ++i) {
 188         const char *str = SystemCalls<Tru64>::name(i);
 189         if (str) {
 190             _syscall.subname(i, str);
 191         }
 192     }
 193
 194     _faults
 195         .init(Num_Faults)
 196         .name(name + ".faults")
 197         .desc("number of faults")
 198         .flags(total | pdf | nozero | nonan)
 199         ;
 200
 201     for (int i = 1; i < Num_Faults; ++i) {
 202         const char *str = FaultName(i);
 203         if (str)
 204             _faults.subname(i, str);
 205     }
 206
 207     _mode
 208         .init(2)
 209         .name(name + ".mode_switch")
 210         .subname(0, "kernel")
 211         .subname(1, "user")
 212         .desc("number of protection mode switches")
 213         ;
 214
 215     _modeGood
 216         .init(2)
 217         ;
 218
 219     _modeFraction
 220         .name(name + ".mode_switch_good")
 221         .subname(0, "kernel")
 222         .subname(1, "user")
 223         .desc("fraction of useful protection mode switches")
 224         .flags(total)
 225         ;
 226     _modeFraction = _modeGood / _mode;
 227
 228     _modeTicks
 229         .init(2)
 230         .name(name + ".mode_ticks")
 231         .subname(0, "kernel")
 232         .subname(1, "user")
 233         .desc("number of ticks spent at the given mode")
 234         .flags(pdf)
 235         ;
 236
 237     _swap_context
 238         .name(name + ".swap_context")
 239         .desc("number of times the context was actually changed")
 240         ;
 241 }
 242
 243 void
 244 KernelStats::arm()
 245 { data->_arm++; }
 246
 247 void
 248 KernelStats::quiesce()
 249 { data->_quiesce++; }
 250
 251 void
 252 KernelStats::ivlb()
 253 { data->_ivlb++; }
 254
 255 void
 256 KernelStats::ivle()
 257 { data->_ivle++; }
 258
 259 void
 260 KernelStats::hwrei()
 261 { data->_hwrei++; }
 262
 263 void
 264 KernelStats::fault(Fault fault)
 265 { data->_faults[fault]++; }
 266
 267 void
 268 KernelStats::swpipl(int ipl)
 269 { data->swpipl(ipl); }
 270
 271 void
 272 KernelStats::mode(bool user)
 273 { data->mode(user); }
 274
 275 void
 276 KernelStats::context(Addr old_pcbb, Addr new_pcbb)
 277 { data->_swap_context++; }
 278
 279 void
 280 KernelStats::callpal(int code)
 281 { data->callpal(code); }
 282
 283
 284 void
 285 KSData::swpipl(int ipl)
 286 {
 287     assert(ipl >= 0 && ipl <= 0x1f && "invalid IPL\n");
 288
 289     _iplCount[ipl]++;
 290
 291     if (ipl == iplLast)
 292         return;
 293
 294     _iplGood[ipl]++;
 295     _iplTicks[iplLast] += curTick - iplLastTick;
 296     iplLastTick = curTick;
 297     iplLast = ipl;
 298 }
 299
 300 void
 301 KSData::mode(bool user)
 302 {
 303     _mode[user]++;
 304     if (user == lastUser)
 305         return;
 306
 307     _modeGood[user]++;
 308     _modeTicks[lastUser] += curTick - lastModeTick;
 309
 310     lastModeTick = curTick;
 311     lastUser = user;
 312
 313     if (xc->system->bin) {
 314         if (!xc->swCtx || xc->swCtx->callStack.empty()) {
 315             if (user)
 316                 xc->system->User->activate();
 317             else
 318                 xc->system->Kernel->activate();
 319         }
 320     }
 321 }
 322
 323 void
 324 KSData::callpal(int code)
 325 {
 326     if (!PAL::name(code))
 327         return;
 328
 329     _callpal[code]++;
 330
 331     switch (code) {
 332       case PAL::callsys:
 333         {
 334             int number = xc->regs.intRegFile[0];
 335             if (SystemCalls<Tru64>::validSyscallNumber(number)) {
 336                 int cvtnum = SystemCalls<Tru64>::convert(number);
 337                 _syscall[cvtnum]++;
 338             }
 339         }
 340         break;
 341     }
 342
 343     if (code == PAL::swpctx) {
 344         SWContext *out = xc->swCtx;
 345         System *sys = xc->system;
 346         if (!sys->bin)
 347             return;
 348         DPRINTF(TCPIP, "swpctx event\n");
 349         if (out) {
 350             DPRINTF(TCPIP, "swapping context out with this stack!\n");
 351             xc->system->dumpState(xc);
 352             Addr oldPCB = xc->regs.ipr[TheISA::IPR_PALtemp23];
 353
 354             if (out->callStack.empty()) {
 355                 DPRINTF(TCPIP, "but removing it, cuz empty!\n");
 356                 SWContext *find = sys->findContext(oldPCB);
 357                 if (find) {
 358                     assert(sys->findContext(oldPCB) == out);
 359                     sys->remContext(oldPCB);
 360                 }
 361                 delete out;
 362             } else {
 363                 DPRINTF(TCPIP, "switching out context with pcb %#x, top fn %s\n",
 364                         oldPCB, out->callStack.top()->name);
 365                 if (!sys->findContext(oldPCB)) {
 366                     if (!sys->addContext(oldPCB, out))
 367                         panic("could not add context");
 368                 }
 369             }
 370         }
 371
 372         Addr newPCB = xc->regs.intRegFile[16];
 373         SWContext *in = sys->findContext(newPCB);
 374         xc->swCtx = in;
 375
 376         if (in) {
 377             assert(!in->callStack.empty() &&
 378                    "should not be switching in empty context");
 379             DPRINTF(TCPIP, "swapping context in with this callstack!\n");
 380             xc->system->dumpState(xc);
 381             sys->remContext(newPCB);
 382             fnCall *top = in->callStack.top();
 383             DPRINTF(TCPIP, "switching in to pcb %#x, %s\n", newPCB, top->name);
 384             assert(top->myBin && "should not switch to context with no Bin");
 385             top->myBin->activate();
 386         } else {
 387             sys->Kernel->activate();
 388         }
 389         DPRINTF(TCPIP, "end swpctx\n");
 390     }
 391 }