src/counters.h

   1 // Copyright 2012 the V8 project authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef V8_COUNTERS_H_
   6 #define V8_COUNTERS_H_
   7
   8 #include "include/v8.h"
   9 #include "src/allocation.h"
  10 #include "src/base/platform/elapsed-timer.h"
  11 #include "src/base/platform/time.h"
  12 #include "src/globals.h"
  13 #include "src/objects.h"
  14
  15 namespace v8 {
  16 namespace internal {
  17
  18 // StatsCounters is an interface for plugging into external
  19 // counters for monitoring.  Counters can be looked up and
  20 // manipulated by name.
  21
  22 class StatsTable {
  23  public:
  24   // Register an application-defined function where
  25   // counters can be looked up.
  26   void SetCounterFunction(CounterLookupCallback f) {
  27     lookup_function_ = f;
  28   }
  29
  30   // Register an application-defined function to create
  31   // a histogram for passing to the AddHistogramSample function
  32   void SetCreateHistogramFunction(CreateHistogramCallback f) {
  33     create_histogram_function_ = f;
  34   }
  35
  36   // Register an application-defined function to add a sample
  37   // to a histogram created with CreateHistogram function
  38   void SetAddHistogramSampleFunction(AddHistogramSampleCallback f) {
  39     add_histogram_sample_function_ = f;
  40   }
  41
  42   bool HasCounterFunction() const {
  43     return lookup_function_ != NULL;
  44   }
  45
  46   // Lookup the location of a counter by name.  If the lookup
  47   // is successful, returns a non-NULL pointer for writing the
  48   // value of the counter.  Each thread calling this function
  49   // may receive a different location to store it's counter.
  50   // The return value must not be cached and re-used across
  51   // threads, although a single thread is free to cache it.
  52   int* FindLocation(const char* name) {
  53     if (!lookup_function_) return NULL;
  54     return lookup_function_(name);
  55   }
  56
  57   // Create a histogram by name. If the create is successful,
  58   // returns a non-NULL pointer for use with AddHistogramSample
  59   // function. min and max define the expected minimum and maximum
  60   // sample values. buckets is the maximum number of buckets
  61   // that the samples will be grouped into.
  62   void* CreateHistogram(const char* name,
  63                         int min,
  64                         int max,
  65                         size_t buckets) {
  66     if (!create_histogram_function_) return NULL;
  67     return create_histogram_function_(name, min, max, buckets);
  68   }
  69
  70   // Add a sample to a histogram created with the CreateHistogram
  71   // function.
  72   void AddHistogramSample(void* histogram, int sample) {
  73     if (!add_histogram_sample_function_) return;
  74     return add_histogram_sample_function_(histogram, sample);
  75   }
  76
  77  private:
  78   StatsTable();
  79
  80   CounterLookupCallback lookup_function_;
  81   CreateHistogramCallback create_histogram_function_;
  82   AddHistogramSampleCallback add_histogram_sample_function_;
  83
  84   friend class Isolate;
  85
  86   DISALLOW_COPY_AND_ASSIGN(StatsTable);
  87 };
  88
  89 // StatsCounters are dynamically created values which can be tracked in
  90 // the StatsTable.  They are designed to be lightweight to create and
  91 // easy to use.
  92 //
  93 // Internally, a counter represents a value in a row of a StatsTable.
  94 // The row has a 32bit value for each process/thread in the table and also
  95 // a name (stored in the table metadata).  Since the storage location can be
  96 // thread-specific, this class cannot be shared across threads.
  97 class StatsCounter {
  98  public:
  99   StatsCounter() { }
 100   explicit StatsCounter(Isolate* isolate, const char* name)
 101       : isolate_(isolate), name_(name), ptr_(NULL), lookup_done_(false) { }
 102
 103   // Sets the counter to a specific value.
 104   void Set(int value) {
 105     int* loc = GetPtr();
 106     if (loc) *loc = value;
 107   }
 108
 109   // Increments the counter.
 110   void Increment() {
 111     int* loc = GetPtr();
 112     if (loc) (*loc)++;
 113   }
 114
 115   void Increment(int value) {
 116     int* loc = GetPtr();
 117     if (loc)
 118       (*loc) += value;
 119   }
 120
 121   // Decrements the counter.
 122   void Decrement() {
 123     int* loc = GetPtr();
 124     if (loc) (*loc)--;
 125   }
 126
 127   void Decrement(int value) {
 128     int* loc = GetPtr();
 129     if (loc) (*loc) -= value;
 130   }
 131
 132   // Is this counter enabled?
 133   // Returns false if table is full.
 134   bool Enabled() {
 135     return GetPtr() != NULL;
 136   }
 137
 138   // Get the internal pointer to the counter. This is used
 139   // by the code generator to emit code that manipulates a
 140   // given counter without calling the runtime system.
 141   int* GetInternalPointer() {
 142     int* loc = GetPtr();
 143     DCHECK(loc != NULL);
 144     return loc;
 145   }
 146
 147   // Reset the cached internal pointer.
 148   void Reset() { lookup_done_ = false; }
 149
 150  protected:
 151   // Returns the cached address of this counter location.
 152   int* GetPtr() {
 153     if (lookup_done_) return ptr_;
 154     lookup_done_ = true;
 155     ptr_ = FindLocationInStatsTable();
 156     return ptr_;
 157   }
 158
 159  private:
 160   int* FindLocationInStatsTable() const;
 161
 162   Isolate* isolate_;
 163   const char* name_;
 164   int* ptr_;
 165   bool lookup_done_;
 166 };
 167
 168 // A Histogram represents a dynamically created histogram in the StatsTable.
 169 // It will be registered with the histogram system on first use.
 170 class Histogram {
 171  public:
 172   Histogram() { }
 173   Histogram(const char* name,
 174             int min,
 175             int max,
 176             int num_buckets,
 177             Isolate* isolate)
 178       : name_(name),
 179         min_(min),
 180         max_(max),
 181         num_buckets_(num_buckets),
 182         histogram_(NULL),
 183         lookup_done_(false),
 184         isolate_(isolate) { }
 185
 186   // Add a single sample to this histogram.
 187   void AddSample(int sample);
 188
 189   // Returns true if this histogram is enabled.
 190   bool Enabled() {
 191     return GetHistogram() != NULL;
 192   }
 193
 194   // Reset the cached internal pointer.
 195   void Reset() {
 196     lookup_done_ = false;
 197   }
 198
 199  protected:
 200   // Returns the handle to the histogram.
 201   void* GetHistogram() {
 202     if (!lookup_done_) {
 203       lookup_done_ = true;
 204       histogram_ = CreateHistogram();
 205     }
 206     return histogram_;
 207   }
 208
 209   const char* name() { return name_; }
 210   Isolate* isolate() const { return isolate_; }
 211
 212  private:
 213   void* CreateHistogram() const;
 214
 215   const char* name_;
 216   int min_;
 217   int max_;
 218   int num_buckets_;
 219   void* histogram_;
 220   bool lookup_done_;
 221   Isolate* isolate_;
 222 };
 223
 224 // A HistogramTimer allows distributions of results to be created.
 225 class HistogramTimer : public Histogram {
 226  public:
 227   enum Resolution {
 228     MILLISECOND,
 229     MICROSECOND
 230   };
 231
 232   HistogramTimer() {}
 233   HistogramTimer(const char* name, int min, int max, Resolution resolution,
 234                  int num_buckets, Isolate* isolate)
 235       : Histogram(name, min, max, num_buckets, isolate),
 236         resolution_(resolution) {}
 237
 238   // Start the timer.
 239   void Start();
 240
 241   // Stop the timer and record the results.
 242   void Stop();
 243
 244   // Returns true if the timer is running.
 245   bool Running() {
 246     return Enabled() && timer_.IsStarted();
 247   }
 248
 249   // TODO(bmeurer): Remove this when HistogramTimerScope is fixed.
 250 #ifdef DEBUG
 251   base::ElapsedTimer* timer() { return &timer_; }
 252 #endif
 253
 254  private:
 255   base::ElapsedTimer timer_;
 256   Resolution resolution_;
 257 };
 258
 259 // Helper class for scoping a HistogramTimer.
 260 // TODO(bmeurer): The ifdeffery is an ugly hack around the fact that the
 261 // Parser is currently reentrant (when it throws an error, we call back
 262 // into JavaScript and all bets are off), but ElapsedTimer is not
 263 // reentry-safe. Fix this properly and remove |allow_nesting|.
 264 class HistogramTimerScope BASE_EMBEDDED {
 265  public:
 266   explicit HistogramTimerScope(HistogramTimer* timer,
 267                                bool allow_nesting = false)
 268 #ifdef DEBUG
 269       : timer_(timer),
 270         skipped_timer_start_(false) {
 271     if (timer_->timer()->IsStarted() && allow_nesting) {
 272       skipped_timer_start_ = true;
 273     } else {
 274       timer_->Start();
 275     }
 276   }
 277 #else
 278       : timer_(timer) {
 279     timer_->Start();
 280   }
 281 #endif
 282   ~HistogramTimerScope() {
 283 #ifdef DEBUG
 284     if (!skipped_timer_start_) {
 285       timer_->Stop();
 286     }
 287 #else
 288     timer_->Stop();
 289 #endif
 290   }
 291
 292  private:
 293   HistogramTimer* timer_;
 294 #ifdef DEBUG
 295   bool skipped_timer_start_;
 296 #endif
 297 };
 298
 299
 300 // A histogram timer that can aggregate events within a larger scope.
 301 //
 302 // Intended use of this timer is to have an outer (aggregating) and an inner
 303 // (to be aggregated) scope, where the inner scope measure the time of events,
 304 // and all those inner scope measurements will be summed up by the outer scope.
 305 // An example use might be to aggregate the time spent in lazy compilation
 306 // while running a script.
 307 //
 308 // Helpers:
 309 // - AggregatingHistogramTimerScope, the "outer" scope within which
 310 //     times will be summed up.
 311 // - AggregatedHistogramTimerScope, the "inner" scope which defines the
 312 //     events to be timed.
 313 class AggregatableHistogramTimer : public Histogram {
 314  public:
 315   AggregatableHistogramTimer() {}
 316   AggregatableHistogramTimer(const char* name, int min, int max,
 317                              int num_buckets, Isolate* isolate)
 318       : Histogram(name, min, max, num_buckets, isolate) {}
 319
 320   // Start/stop the "outer" scope.
 321   void Start() { time_ = base::TimeDelta(); }
 322   void Stop() { AddSample(static_cast<int>(time_.InMicroseconds())); }
 323
 324   // Add a time value ("inner" scope).
 325   void Add(base::TimeDelta other) { time_ += other; }
 326
 327  private:
 328   base::TimeDelta time_;
 329 };
 330
 331
 332 // A helper class for use with AggregatableHistogramTimer.
 333 class AggregatingHistogramTimerScope {
 334  public:
 335   explicit AggregatingHistogramTimerScope(AggregatableHistogramTimer* histogram)
 336       : histogram_(histogram) {
 337     histogram_->Start();
 338   }
 339   ~AggregatingHistogramTimerScope() { histogram_->Stop(); }
 340
 341  private:
 342   AggregatableHistogramTimer* histogram_;
 343 };
 344
 345
 346 // A helper class for use with AggregatableHistogramTimer.
 347 class AggregatedHistogramTimerScope {
 348  public:
 349   explicit AggregatedHistogramTimerScope(AggregatableHistogramTimer* histogram)
 350       : histogram_(histogram) {
 351     timer_.Start();
 352   }
 353   ~AggregatedHistogramTimerScope() { histogram_->Add(timer_.Elapsed()); }
 354
 355  private:
 356   base::ElapsedTimer timer_;
 357   AggregatableHistogramTimer* histogram_;
 358 };
 359
 360
 361 // AggretatedMemoryHistogram collects (time, value) sample pairs and turns
 362 // them into time-uniform samples for the backing historgram, such that the
 363 // backing histogram receives one sample every T ms, where the T is controlled
 364 // by the FLAG_histogram_interval.
 365 //
 366 // More formally: let F be a real-valued function that maps time to sample
 367 // values. We define F as a linear interpolation between adjacent samples. For
 368 // each time interval [x; x + T) the backing histogram gets one sample value
 369 // that is the average of F(t) in the interval.
 370 template <typename Histogram>
 371 class AggregatedMemoryHistogram {
 372  public:
 373   AggregatedMemoryHistogram()
 374       : is_initialized_(false),
 375         start_ms_(0.0),
 376         last_ms_(0.0),
 377         aggregate_value_(0.0),
 378         last_value_(0.0),
 379         backing_histogram_(NULL) {}
 380
 381   explicit AggregatedMemoryHistogram(Histogram* backing_histogram)
 382       : AggregatedMemoryHistogram() {
 383     backing_histogram_ = backing_histogram;
 384   }
 385
 386   // Invariants that hold before and after AddSample if
 387   // is_initialized_ is true:
 388   //
 389   // 1) For we processed samples that came in before start_ms_ and sent the
 390   // corresponding aggregated samples to backing histogram.
 391   // 2) (last_ms_, last_value_) is the last received sample.
 392   // 3) last_ms_ < start_ms_ + FLAG_histogram_interval.
 393   // 4) aggregate_value_ is the average of the function that is constructed by
 394   // linearly interpolating samples received between start_ms_ and last_ms_.
 395   void AddSample(double current_ms, double current_value);
 396
 397  private:
 398   double Aggregate(double current_ms, double current_value);
 399   bool is_initialized_;
 400   double start_ms_;
 401   double last_ms_;
 402   double aggregate_value_;
 403   double last_value_;
 404   Histogram* backing_histogram_;
 405 };
 406
 407
 408 template <typename Histogram>
 409 void AggregatedMemoryHistogram<Histogram>::AddSample(double current_ms,
 410                                                      double current_value) {
 411   if (!is_initialized_) {
 412     aggregate_value_ = current_value;
 413     start_ms_ = current_ms;
 414     last_value_ = current_value;
 415     last_ms_ = current_ms;
 416     is_initialized_ = true;
 417   } else {
 418     const double kEpsilon = 1e-6;
 419     const int kMaxSamples = 1000;
 420     if (current_ms < last_ms_ + kEpsilon) {
 421       // Two samples have the same time, remember the last one.
 422       last_value_ = current_value;
 423     } else {
 424       double sample_interval_ms = FLAG_histogram_interval;
 425       double end_ms = start_ms_ + sample_interval_ms;
 426       if (end_ms <= current_ms + kEpsilon) {
 427         // Linearly interpolate between the last_ms_ and the current_ms.
 428         double slope = (current_value - last_value_) / (current_ms - last_ms_);
 429         int i;
 430         // Send aggregated samples to the backing histogram from the start_ms
 431         // to the current_ms.
 432         for (i = 0; i < kMaxSamples && end_ms <= current_ms + kEpsilon; i++) {
 433           double end_value = last_value_ + (end_ms - last_ms_) * slope;
 434           double sample_value;
 435           if (i == 0) {
 436             // Take aggregate_value_ into account.
 437             sample_value = Aggregate(end_ms, end_value);
 438           } else {
 439             // There is no aggregate_value_ for i > 0.
 440             sample_value = (last_value_ + end_value) / 2;
 441           }
 442           backing_histogram_->AddSample(static_cast<int>(sample_value + 0.5));
 443           last_value_ = end_value;
 444           last_ms_ = end_ms;
 445           end_ms += sample_interval_ms;
 446         }
 447         if (i == kMaxSamples) {
 448           // We hit the sample limit, ignore the remaining samples.
 449           aggregate_value_ = current_value;
 450           start_ms_ = current_ms;
 451         } else {
 452           aggregate_value_ = last_value_;
 453           start_ms_ = last_ms_;
 454         }
 455       }
 456       aggregate_value_ = current_ms > start_ms_ + kEpsilon
 457                              ? Aggregate(current_ms, current_value)
 458                              : aggregate_value_;
 459       last_value_ = current_value;
 460       last_ms_ = current_ms;
 461     }
 462   }
 463 }
 464
 465
 466 template <typename Histogram>
 467 double AggregatedMemoryHistogram<Histogram>::Aggregate(double current_ms,
 468                                                        double current_value) {
 469   double interval_ms = current_ms - start_ms_;
 470   double value = (current_value + last_value_) / 2;
 471   // The aggregate_value_ is the average for [start_ms_; last_ms_].
 472   // The value is the average for [last_ms_; current_ms].
 473   // Return the weighted average of the aggregate_value_ and the value.
 474   return aggregate_value_ * ((last_ms_ - start_ms_) / interval_ms) +
 475          value * ((current_ms - last_ms_) / interval_ms);
 476 }
 477
 478
 479 #define HISTOGRAM_RANGE_LIST(HR)                                              \
 480   /* Generic range histograms */                                              \
 481   HR(detached_context_age_in_gc, V8.DetachedContextAgeInGC, 0, 20, 21)        \
 482   HR(gc_idle_time_allotted_in_ms, V8.GCIdleTimeAllottedInMS, 0, 10000, 101)   \
 483   HR(gc_idle_time_limit_overshot, V8.GCIdleTimeLimit.Overshot, 0, 10000, 101) \
 484   HR(gc_idle_time_limit_undershot, V8.GCIdleTimeLimit.Undershot, 0, 10000,    \
 485      101)                                                                     \
 486   HR(code_cache_reject_reason, V8.CodeCacheRejectReason, 1, 6, 6)
 487
 488 #define HISTOGRAM_TIMER_LIST(HT)                                              \
 489   /* Garbage collection timers. */                                            \
 490   HT(gc_compactor, V8.GCCompactor, 10000, MILLISECOND)                        \
 491   HT(gc_scavenger, V8.GCScavenger, 10000, MILLISECOND)                        \
 492   HT(gc_context, V8.GCContext, 10000,                                         \
 493      MILLISECOND) /* GC context cleanup time */                               \
 494   HT(gc_idle_notification, V8.GCIdleNotification, 10000, MILLISECOND)         \
 495   HT(gc_incremental_marking, V8.GCIncrementalMarking, 10000, MILLISECOND)     \
 496   HT(gc_low_memory_notification, V8.GCLowMemoryNotification, 10000,           \
 497      MILLISECOND)                                                             \
 498   /* Parsing timers. */                                                       \
 499   HT(parse, V8.ParseMicroSeconds, 1000000, MICROSECOND)                       \
 500   HT(parse_lazy, V8.ParseLazyMicroSeconds, 1000000, MICROSECOND)              \
 501   HT(pre_parse, V8.PreParseMicroSeconds, 1000000, MICROSECOND)                \
 502   /* Compilation times. */                                                    \
 503   HT(compile, V8.CompileMicroSeconds, 1000000, MICROSECOND)                   \
 504   HT(compile_eval, V8.CompileEvalMicroSeconds, 1000000, MICROSECOND)          \
 505   /* Serialization as part of compilation (code caching) */                   \
 506   HT(compile_serialize, V8.CompileSerializeMicroSeconds, 100000, MICROSECOND) \
 507   HT(compile_deserialize, V8.CompileDeserializeMicroSeconds, 1000000,         \
 508      MICROSECOND)                                                             \
 509   /* Total compilation time incl. caching/parsing */                          \
 510   HT(compile_script, V8.CompileScriptMicroSeconds, 1000000, MICROSECOND)
 511
 512
 513 #define AGGREGATABLE_HISTOGRAM_TIMER_LIST(AHT) \
 514   AHT(compile_lazy, V8.CompileLazyMicroSeconds)
 515
 516
 517 #define HISTOGRAM_PERCENTAGE_LIST(HP)                                          \
 518   /* Heap fragmentation. */                                                    \
 519   HP(external_fragmentation_total, V8.MemoryExternalFragmentationTotal)        \
 520   HP(external_fragmentation_old_space, V8.MemoryExternalFragmentationOldSpace) \
 521   HP(external_fragmentation_code_space,                                        \
 522      V8.MemoryExternalFragmentationCodeSpace)                                  \
 523   HP(external_fragmentation_map_space, V8.MemoryExternalFragmentationMapSpace) \
 524   HP(external_fragmentation_lo_space, V8.MemoryExternalFragmentationLoSpace)   \
 525   /* Percentages of heap committed to each space. */                           \
 526   HP(heap_fraction_new_space, V8.MemoryHeapFractionNewSpace)                   \
 527   HP(heap_fraction_old_space, V8.MemoryHeapFractionOldSpace)                   \
 528   HP(heap_fraction_code_space, V8.MemoryHeapFractionCodeSpace)                 \
 529   HP(heap_fraction_map_space, V8.MemoryHeapFractionMapSpace)                   \
 530   HP(heap_fraction_lo_space, V8.MemoryHeapFractionLoSpace)                     \
 531   /* Percentage of crankshafted codegen. */                                    \
 532   HP(codegen_fraction_crankshaft, V8.CodegenFractionCrankshaft)
 533
 534
 535 #define HISTOGRAM_LEGACY_MEMORY_LIST(HM)                                      \
 536   HM(heap_sample_total_committed, V8.MemoryHeapSampleTotalCommitted)          \
 537   HM(heap_sample_total_used, V8.MemoryHeapSampleTotalUsed)                    \
 538   HM(heap_sample_map_space_committed, V8.MemoryHeapSampleMapSpaceCommitted)   \
 539   HM(heap_sample_code_space_committed, V8.MemoryHeapSampleCodeSpaceCommitted) \
 540   HM(heap_sample_maximum_committed, V8.MemoryHeapSampleMaximumCommitted)
 541
 542 #define HISTOGRAM_MEMORY_LIST(HM)                   \
 543   HM(memory_heap_committed, V8.MemoryHeapCommitted) \
 544   HM(memory_heap_used, V8.MemoryHeapUsed)
 545
 546
 547 // WARNING: STATS_COUNTER_LIST_* is a very large macro that is causing MSVC
 548 // Intellisense to crash.  It was broken into two macros (each of length 40
 549 // lines) rather than one macro (of length about 80 lines) to work around
 550 // this problem.  Please avoid using recursive macros of this length when
 551 // possible.
 552 #define STATS_COUNTER_LIST_1(SC)                                      \
 553   /* Global Handle Count*/                                            \
 554   SC(global_handles, V8.GlobalHandles)                                \
 555   /* OS Memory allocated */                                           \
 556   SC(memory_allocated, V8.OsMemoryAllocated)                          \
 557   SC(normalized_maps, V8.NormalizedMaps)                              \
 558   SC(props_to_dictionary, V8.ObjectPropertiesToDictionary)            \
 559   SC(elements_to_dictionary, V8.ObjectElementsToDictionary)           \
 560   SC(alive_after_last_gc, V8.AliveAfterLastGC)                        \
 561   SC(objs_since_last_young, V8.ObjsSinceLastYoung)                    \
 562   SC(objs_since_last_full, V8.ObjsSinceLastFull)                      \
 563   SC(string_table_capacity, V8.StringTableCapacity)                   \
 564   SC(number_of_symbols, V8.NumberOfSymbols)                           \
 565   SC(script_wrappers, V8.ScriptWrappers)                              \
 566   SC(call_initialize_stubs, V8.CallInitializeStubs)                   \
 567   SC(call_premonomorphic_stubs, V8.CallPreMonomorphicStubs)           \
 568   SC(call_normal_stubs, V8.CallNormalStubs)                           \
 569   SC(call_megamorphic_stubs, V8.CallMegamorphicStubs)                 \
 570   SC(inlined_copied_elements, V8.InlinedCopiedElements)              \
 571   SC(arguments_adaptors, V8.ArgumentsAdaptors)                        \
 572   SC(compilation_cache_hits, V8.CompilationCacheHits)                 \
 573   SC(compilation_cache_misses, V8.CompilationCacheMisses)             \
 574   /* Amount of evaled source code. */                                 \
 575   SC(total_eval_size, V8.TotalEvalSize)                               \
 576   /* Amount of loaded source code. */                                 \
 577   SC(total_load_size, V8.TotalLoadSize)                               \
 578   /* Amount of parsed source code. */                                 \
 579   SC(total_parse_size, V8.TotalParseSize)                             \
 580   /* Amount of source code skipped over using preparsing. */          \
 581   SC(total_preparse_skipped, V8.TotalPreparseSkipped)                 \
 582   /* Number of symbol lookups skipped using preparsing */             \
 583   SC(total_preparse_symbols_skipped, V8.TotalPreparseSymbolSkipped)   \
 584   /* Amount of compiled source code. */                               \
 585   SC(total_compile_size, V8.TotalCompileSize)                         \
 586   /* Amount of source code compiled with the full codegen. */         \
 587   SC(total_full_codegen_source_size, V8.TotalFullCodegenSourceSize)   \
 588   /* Number of contexts created from scratch. */                      \
 589   SC(contexts_created_from_scratch, V8.ContextsCreatedFromScratch)    \
 590   /* Number of contexts created by partial snapshot. */               \
 591   SC(contexts_created_by_snapshot, V8.ContextsCreatedBySnapshot)      \
 592   /* Number of code objects found from pc. */                         \
 593   SC(pc_to_code, V8.PcToCode)                                         \
 594   SC(pc_to_code_cached, V8.PcToCodeCached)                            \
 595   /* The store-buffer implementation of the write barrier. */         \
 596   SC(store_buffer_compactions, V8.StoreBufferCompactions)             \
 597   SC(store_buffer_overflows, V8.StoreBufferOverflows)
 598
 599
 600 #define STATS_COUNTER_LIST_2(SC)                                               \
 601   /* Number of code stubs. */                                                  \
 602   SC(code_stubs, V8.CodeStubs)                                                 \
 603   /* Amount of stub code. */                                                   \
 604   SC(total_stubs_code_size, V8.TotalStubsCodeSize)                             \
 605   /* Amount of (JS) compiled code. */                                          \
 606   SC(total_compiled_code_size, V8.TotalCompiledCodeSize)                       \
 607   SC(gc_compactor_caused_by_request, V8.GCCompactorCausedByRequest)            \
 608   SC(gc_compactor_caused_by_promoted_data, V8.GCCompactorCausedByPromotedData) \
 609   SC(gc_compactor_caused_by_oldspace_exhaustion,                               \
 610      V8.GCCompactorCausedByOldspaceExhaustion)                                 \
 611   SC(gc_last_resort_from_js, V8.GCLastResortFromJS)                            \
 612   SC(gc_last_resort_from_handles, V8.GCLastResortFromHandles)                  \
 613   /* How is the generic keyed-load stub used? */                               \
 614   SC(keyed_load_generic_smi, V8.KeyedLoadGenericSmi)                           \
 615   SC(keyed_load_generic_symbol, V8.KeyedLoadGenericSymbol)                     \
 616   SC(keyed_load_generic_lookup_cache, V8.KeyedLoadGenericLookupCache)          \
 617   SC(keyed_load_generic_slow, V8.KeyedLoadGenericSlow)                         \
 618   SC(keyed_load_polymorphic_stubs, V8.KeyedLoadPolymorphicStubs)               \
 619   SC(keyed_load_external_array_slow, V8.KeyedLoadExternalArraySlow)            \
 620   /* How is the generic keyed-call stub used? */                               \
 621   SC(keyed_call_generic_smi_fast, V8.KeyedCallGenericSmiFast)                  \
 622   SC(keyed_call_generic_smi_dict, V8.KeyedCallGenericSmiDict)                  \
 623   SC(keyed_call_generic_lookup_cache, V8.KeyedCallGenericLookupCache)          \
 624   SC(keyed_call_generic_lookup_dict, V8.KeyedCallGenericLookupDict)            \
 625   SC(keyed_call_generic_slow, V8.KeyedCallGenericSlow)                         \
 626   SC(keyed_call_generic_slow_load, V8.KeyedCallGenericSlowLoad)                \
 627   SC(named_load_global_stub, V8.NamedLoadGlobalStub)                           \
 628   SC(named_store_global_inline, V8.NamedStoreGlobalInline)                     \
 629   SC(named_store_global_inline_miss, V8.NamedStoreGlobalInlineMiss)            \
 630   SC(keyed_store_polymorphic_stubs, V8.KeyedStorePolymorphicStubs)             \
 631   SC(keyed_store_external_array_slow, V8.KeyedStoreExternalArraySlow)          \
 632   SC(store_normal_miss, V8.StoreNormalMiss)                                    \
 633   SC(store_normal_hit, V8.StoreNormalHit)                                      \
 634   SC(cow_arrays_created_stub, V8.COWArraysCreatedStub)                         \
 635   SC(cow_arrays_created_runtime, V8.COWArraysCreatedRuntime)                   \
 636   SC(cow_arrays_converted, V8.COWArraysConverted)                              \
 637   SC(call_miss, V8.CallMiss)                                                   \
 638   SC(keyed_call_miss, V8.KeyedCallMiss)                                        \
 639   SC(load_miss, V8.LoadMiss)                                                   \
 640   SC(keyed_load_miss, V8.KeyedLoadMiss)                                        \
 641   SC(call_const, V8.CallConst)                                                 \
 642   SC(call_const_fast_api, V8.CallConstFastApi)                                 \
 643   SC(call_const_interceptor, V8.CallConstInterceptor)                          \
 644   SC(call_const_interceptor_fast_api, V8.CallConstInterceptorFastApi)          \
 645   SC(call_global_inline, V8.CallGlobalInline)                                  \
 646   SC(call_global_inline_miss, V8.CallGlobalInlineMiss)                         \
 647   SC(constructed_objects, V8.ConstructedObjects)                               \
 648   SC(constructed_objects_runtime, V8.ConstructedObjectsRuntime)                \
 649   SC(negative_lookups, V8.NegativeLookups)                                     \
 650   SC(negative_lookups_miss, V8.NegativeLookupsMiss)                            \
 651   SC(megamorphic_stub_cache_probes, V8.MegamorphicStubCacheProbes)             \
 652   SC(megamorphic_stub_cache_misses, V8.MegamorphicStubCacheMisses)             \
 653   SC(megamorphic_stub_cache_updates, V8.MegamorphicStubCacheUpdates)           \
 654   SC(array_function_runtime, V8.ArrayFunctionRuntime)                          \
 655   SC(array_function_native, V8.ArrayFunctionNative)                            \
 656   SC(enum_cache_hits, V8.EnumCacheHits)                                        \
 657   SC(enum_cache_misses, V8.EnumCacheMisses)                                    \
 658   SC(fast_new_closure_total, V8.FastNewClosureTotal)                           \
 659   SC(fast_new_closure_try_optimized, V8.FastNewClosureTryOptimized)            \
 660   SC(fast_new_closure_install_optimized, V8.FastNewClosureInstallOptimized)    \
 661   SC(string_add_runtime, V8.StringAddRuntime)                                  \
 662   SC(string_add_native, V8.StringAddNative)                                    \
 663   SC(string_add_runtime_ext_to_one_byte, V8.StringAddRuntimeExtToOneByte)      \
 664   SC(sub_string_runtime, V8.SubStringRuntime)                                  \
 665   SC(sub_string_native, V8.SubStringNative)                                    \
 666   SC(string_add_make_two_char, V8.StringAddMakeTwoChar)                        \
 667   SC(string_compare_native, V8.StringCompareNative)                            \
 668   SC(string_compare_runtime, V8.StringCompareRuntime)                          \
 669   SC(regexp_entry_runtime, V8.RegExpEntryRuntime)                              \
 670   SC(regexp_entry_native, V8.RegExpEntryNative)                                \
 671   SC(number_to_string_native, V8.NumberToStringNative)                         \
 672   SC(number_to_string_runtime, V8.NumberToStringRuntime)                       \
 673   SC(math_acos, V8.MathAcos)                                                   \
 674   SC(math_asin, V8.MathAsin)                                                   \
 675   SC(math_atan, V8.MathAtan)                                                   \
 676   SC(math_atan2, V8.MathAtan2)                                                 \
 677   SC(math_clz32, V8.MathClz32)                                                 \
 678   SC(math_exp, V8.MathExp)                                                     \
 679   SC(math_floor, V8.MathFloor)                                                 \
 680   SC(math_log, V8.MathLog)                                                     \
 681   SC(math_pow, V8.MathPow)                                                     \
 682   SC(math_round, V8.MathRound)                                                 \
 683   SC(math_sqrt, V8.MathSqrt)                                                   \
 684   SC(stack_interrupts, V8.StackInterrupts)                                     \
 685   SC(runtime_profiler_ticks, V8.RuntimeProfilerTicks)                          \
 686   SC(bounds_checks_eliminated, V8.BoundsChecksEliminated)                      \
 687   SC(bounds_checks_hoisted, V8.BoundsChecksHoisted)                            \
 688   SC(soft_deopts_requested, V8.SoftDeoptsRequested)                            \
 689   SC(soft_deopts_inserted, V8.SoftDeoptsInserted)                              \
 690   SC(soft_deopts_executed, V8.SoftDeoptsExecuted)                              \
 691   /* Number of write barriers in generated code. */                            \
 692   SC(write_barriers_dynamic, V8.WriteBarriersDynamic)                          \
 693   SC(write_barriers_static, V8.WriteBarriersStatic)                            \
 694   SC(new_space_bytes_available, V8.MemoryNewSpaceBytesAvailable)               \
 695   SC(new_space_bytes_committed, V8.MemoryNewSpaceBytesCommitted)               \
 696   SC(new_space_bytes_used, V8.MemoryNewSpaceBytesUsed)                         \
 697   SC(old_space_bytes_available, V8.MemoryOldSpaceBytesAvailable)               \
 698   SC(old_space_bytes_committed, V8.MemoryOldSpaceBytesCommitted)               \
 699   SC(old_space_bytes_used, V8.MemoryOldSpaceBytesUsed)                         \
 700   SC(code_space_bytes_available, V8.MemoryCodeSpaceBytesAvailable)             \
 701   SC(code_space_bytes_committed, V8.MemoryCodeSpaceBytesCommitted)             \
 702   SC(code_space_bytes_used, V8.MemoryCodeSpaceBytesUsed)                       \
 703   SC(map_space_bytes_available, V8.MemoryMapSpaceBytesAvailable)               \
 704   SC(map_space_bytes_committed, V8.MemoryMapSpaceBytesCommitted)               \
 705   SC(map_space_bytes_used, V8.MemoryMapSpaceBytesUsed)                         \
 706   SC(lo_space_bytes_available, V8.MemoryLoSpaceBytesAvailable)                 \
 707   SC(lo_space_bytes_committed, V8.MemoryLoSpaceBytesCommitted)                 \
 708   SC(lo_space_bytes_used, V8.MemoryLoSpaceBytesUsed)
 709
 710
 711 // This file contains all the v8 counters that are in use.
 712 class Counters {
 713  public:
 714 #define HR(name, caption, min, max, num_buckets) \
 715   Histogram* name() { return &name##_; }
 716   HISTOGRAM_RANGE_LIST(HR)
 717 #undef HR
 718
 719 #define HT(name, caption, max, res) \
 720   HistogramTimer* name() { return &name##_; }
 721   HISTOGRAM_TIMER_LIST(HT)
 722 #undef HT
 723
 724 #define AHT(name, caption) \
 725   AggregatableHistogramTimer* name() { return &name##_; }
 726   AGGREGATABLE_HISTOGRAM_TIMER_LIST(AHT)
 727 #undef AHT
 728
 729 #define HP(name, caption) \
 730   Histogram* name() { return &name##_; }
 731   HISTOGRAM_PERCENTAGE_LIST(HP)
 732 #undef HP
 733
 734 #define HM(name, caption) \
 735   Histogram* name() { return &name##_; }
 736   HISTOGRAM_LEGACY_MEMORY_LIST(HM)
 737   HISTOGRAM_MEMORY_LIST(HM)
 738 #undef HM
 739
 740 #define HM(name, caption)                                     \
 741   AggregatedMemoryHistogram<Histogram>* aggregated_##name() { \
 742     return &aggregated_##name##_;                             \
 743   }
 744   HISTOGRAM_MEMORY_LIST(HM)
 745 #undef HM
 746
 747 #define SC(name, caption) \
 748   StatsCounter* name() { return &name##_; }
 749   STATS_COUNTER_LIST_1(SC)
 750   STATS_COUNTER_LIST_2(SC)
 751 #undef SC
 752
 753 #define SC(name) \
 754   StatsCounter* count_of_##name() { return &count_of_##name##_; } \
 755   StatsCounter* size_of_##name() { return &size_of_##name##_; }
 756   INSTANCE_TYPE_LIST(SC)
 757 #undef SC
 758
 759 #define SC(name) \
 760   StatsCounter* count_of_CODE_TYPE_##name() \
 761     { return &count_of_CODE_TYPE_##name##_; } \
 762   StatsCounter* size_of_CODE_TYPE_##name() \
 763     { return &size_of_CODE_TYPE_##name##_; }
 764   CODE_KIND_LIST(SC)
 765 #undef SC
 766
 767 #define SC(name) \
 768   StatsCounter* count_of_FIXED_ARRAY_##name() \
 769     { return &count_of_FIXED_ARRAY_##name##_; } \
 770   StatsCounter* size_of_FIXED_ARRAY_##name() \
 771     { return &size_of_FIXED_ARRAY_##name##_; }
 772   FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(SC)
 773 #undef SC
 774
 775 #define SC(name) \
 776   StatsCounter* count_of_CODE_AGE_##name() \
 777     { return &count_of_CODE_AGE_##name##_; } \
 778   StatsCounter* size_of_CODE_AGE_##name() \
 779     { return &size_of_CODE_AGE_##name##_; }
 780   CODE_AGE_LIST_COMPLETE(SC)
 781 #undef SC
 782
 783   enum Id {
 784 #define RATE_ID(name, caption, max, res) k_##name,
 785     HISTOGRAM_TIMER_LIST(RATE_ID)
 786 #undef RATE_ID
 787 #define AGGREGATABLE_ID(name, caption) k_##name,
 788     AGGREGATABLE_HISTOGRAM_TIMER_LIST(AGGREGATABLE_ID)
 789 #undef AGGREGATABLE_ID
 790 #define PERCENTAGE_ID(name, caption) k_##name,
 791     HISTOGRAM_PERCENTAGE_LIST(PERCENTAGE_ID)
 792 #undef PERCENTAGE_ID
 793 #define MEMORY_ID(name, caption) k_##name,
 794     HISTOGRAM_LEGACY_MEMORY_LIST(MEMORY_ID)
 795     HISTOGRAM_MEMORY_LIST(MEMORY_ID)
 796 #undef MEMORY_ID
 797 #define COUNTER_ID(name, caption) k_##name,
 798     STATS_COUNTER_LIST_1(COUNTER_ID)
 799     STATS_COUNTER_LIST_2(COUNTER_ID)
 800 #undef COUNTER_ID
 801 #define COUNTER_ID(name) kCountOf##name, kSizeOf##name,
 802     INSTANCE_TYPE_LIST(COUNTER_ID)
 803 #undef COUNTER_ID
 804 #define COUNTER_ID(name) kCountOfCODE_TYPE_##name, \
 805     kSizeOfCODE_TYPE_##name,
 806     CODE_KIND_LIST(COUNTER_ID)
 807 #undef COUNTER_ID
 808 #define COUNTER_ID(name) kCountOfFIXED_ARRAY__##name, \
 809     kSizeOfFIXED_ARRAY__##name,
 810     FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(COUNTER_ID)
 811 #undef COUNTER_ID
 812 #define COUNTER_ID(name) kCountOfCODE_AGE__##name, \
 813     kSizeOfCODE_AGE__##name,
 814     CODE_AGE_LIST_COMPLETE(COUNTER_ID)
 815 #undef COUNTER_ID
 816     stats_counter_count
 817   };
 818
 819   void ResetCounters();
 820   void ResetHistograms();
 821
 822  private:
 823 #define HR(name, caption, min, max, num_buckets) Histogram name##_;
 824   HISTOGRAM_RANGE_LIST(HR)
 825 #undef HR
 826
 827 #define HT(name, caption, max, res) HistogramTimer name##_;
 828   HISTOGRAM_TIMER_LIST(HT)
 829 #undef HT
 830
 831 #define AHT(name, caption) \
 832   AggregatableHistogramTimer name##_;
 833   AGGREGATABLE_HISTOGRAM_TIMER_LIST(AHT)
 834 #undef AHT
 835
 836 #define HP(name, caption) \
 837   Histogram name##_;
 838   HISTOGRAM_PERCENTAGE_LIST(HP)
 839 #undef HP
 840
 841 #define HM(name, caption) \
 842   Histogram name##_;
 843   HISTOGRAM_LEGACY_MEMORY_LIST(HM)
 844   HISTOGRAM_MEMORY_LIST(HM)
 845 #undef HM
 846
 847 #define HM(name, caption) \
 848   AggregatedMemoryHistogram<Histogram> aggregated_##name##_;
 849   HISTOGRAM_MEMORY_LIST(HM)
 850 #undef HM
 851
 852 #define SC(name, caption) \
 853   StatsCounter name##_;
 854   STATS_COUNTER_LIST_1(SC)
 855   STATS_COUNTER_LIST_2(SC)
 856 #undef SC
 857
 858 #define SC(name) \
 859   StatsCounter size_of_##name##_; \
 860   StatsCounter count_of_##name##_;
 861   INSTANCE_TYPE_LIST(SC)
 862 #undef SC
 863
 864 #define SC(name) \
 865   StatsCounter size_of_CODE_TYPE_##name##_; \
 866   StatsCounter count_of_CODE_TYPE_##name##_;
 867   CODE_KIND_LIST(SC)
 868 #undef SC
 869
 870 #define SC(name) \
 871   StatsCounter size_of_FIXED_ARRAY_##name##_; \
 872   StatsCounter count_of_FIXED_ARRAY_##name##_;
 873   FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(SC)
 874 #undef SC
 875
 876 #define SC(name) \
 877   StatsCounter size_of_CODE_AGE_##name##_; \
 878   StatsCounter count_of_CODE_AGE_##name##_;
 879   CODE_AGE_LIST_COMPLETE(SC)
 880 #undef SC
 881
 882   friend class Isolate;
 883
 884   explicit Counters(Isolate* isolate);
 885
 886   DISALLOW_IMPLICIT_CONSTRUCTORS(Counters);
 887 };
 888
 889 } }  // namespace v8::internal
 890
 891 #endif  // V8_COUNTERS_H_