Move GCTracer to separate files.

src/gc-tracer.cc

+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/v8.h"
+
+#include "src/gc-tracer.h"
+
+namespace v8 {
+namespace internal {
+
+static intptr_t CountTotalHolesSize(Heap* heap) {
+  intptr_t holes_size = 0;
+  OldSpaces spaces(heap);
+  for (OldSpace* space = spaces.next();
+       space != NULL;
+       space = spaces.next()) {
+    holes_size += space->Waste() + space->Available();
+  }
+  return holes_size;
+}
+
+
+GCTracer::Event::Event(Type type,
+                       const char* gc_reason,
+                       const char* collector_reason)
+    : type(type),
+      gc_reason(gc_reason),
+      collector_reason(collector_reason),
+      start_time(0.0),
+      end_time(0.0),
+      start_object_size(0),
+      end_object_size(0),
+      start_memory_size(0),
+      end_memory_size(0),
+      start_holes_size(0),
+      end_holes_size(0),
+      incremental_marking_steps(0),
+      incremental_marking_duration(0.0) {
+  for (int i = 0; i < Scope::NUMBER_OF_SCOPES; i++) {
+    scopes[i] = 0;
+  }
+}
+
+
+const char* GCTracer::Event::TypeName(bool short_name) const {
+  switch (type) {
+    case SCAVENGER:
+      if (short_name) {
+        return "s";
+      } else {
+        return "Scavenge";
+      }
+    case MARK_COMPACTOR:
+      if (short_name) {
+        return "ms";
+      } else {
+        return "Mark-sweep";
+      }
+    case START:
+      if (short_name) {
+        return "st";
+      } else {
+        return "Start";
+      }
+  }
+  return "Unknown Event Type";
+}
+
+
+GCTracer::GCTracer(Heap* heap)
+    : heap_(heap),
+      incremental_marking_steps_(0),
+      incremental_marking_duration_(0.0),
+      longest_incremental_marking_step_(0.0) {
+  current_ = Event(Event::START, NULL, NULL);
+  current_.end_time = base::OS::TimeCurrentMillis();
+  previous_ = previous_mark_compactor_event_ = current_;
+}
+
+
+void GCTracer::Start(GarbageCollector collector,
+                     const char* gc_reason,
+                     const char* collector_reason) {
+  if (!FLAG_trace_gc && !FLAG_print_cumulative_gc_stat) return;
+
+  previous_ = current_;
+  if (current_.type == Event::MARK_COMPACTOR)
+    previous_mark_compactor_event_ = current_;
+
+  if (collector == SCAVENGER) {
+    current_ = Event(Event::SCAVENGER, gc_reason, collector_reason);
+  } else {
+    current_ = Event(Event::MARK_COMPACTOR, gc_reason, collector_reason);
+  }
+
+  current_.start_time = base::OS::TimeCurrentMillis();
+  current_.start_object_size = heap_->SizeOfObjects();
+  current_.start_memory_size = heap_->isolate()->memory_allocator()->Size();
+  current_.start_holes_size = CountTotalHolesSize(heap_);
+
+  current_.incremental_marking_steps = incremental_marking_steps_;
+  current_.incremental_marking_duration = incremental_marking_duration_;
+  current_.longest_incremental_marking_step = longest_incremental_marking_step_;
+
+  for (int i = 0; i < Scope::NUMBER_OF_SCOPES; i++) {
+    current_.scopes[i] = 0;
+  }
+}
+
+
+void GCTracer::Stop() {
+  if (!FLAG_trace_gc && !FLAG_print_cumulative_gc_stat) return;
+
+  current_.end_time = base::OS::TimeCurrentMillis();
+  current_.end_object_size = heap_->SizeOfObjects();
+  current_.end_memory_size = heap_->isolate()->memory_allocator()->Size();
+  current_.end_holes_size = CountTotalHolesSize(heap_);
+
+  if (current_.type == Event::SCAVENGER) {
+    scavenger_events_.push_front(current_);
+  } else {
+    mark_compactor_events_.push_front(current_);
+  }
+
+  if (current_.type == Event::MARK_COMPACTOR)
+    longest_incremental_marking_step_ = 0.0;
+
+  double duration = current_.end_time - current_.start_time;
+  double spent_in_mutator =
+      Max(current_.start_time - previous_.end_time, 0.0);
+
+  heap_->UpdateCumulativeGCStatistics(duration,
+                                      spent_in_mutator,
+                                      current_.scopes[Scope::MC_MARK]);
+
+  if (current_.type == Event::SCAVENGER && FLAG_trace_gc_ignore_scavenger)
+    return;
+
+  if (FLAG_trace_gc) {
+    if (FLAG_trace_gc_nvp)
+      PrintNVP();
+    else
+      Print();
+
+    heap_->PrintShortHeapStatistics();
+  }
+}
+
+
+void GCTracer::AddIncrementalMarkingStep(double duration) {
+  incremental_marking_steps_++;
+  incremental_marking_duration_ += duration;
+  longest_incremental_marking_step_ =
+      Max(longest_incremental_marking_step_, duration);
+}
+
+
+void GCTracer::Print() const {
+  PrintPID("%8.0f ms: ", heap_->isolate()->time_millis_since_init());
+
+  PrintF("%s %.1f (%.1f) -> %.1f (%.1f) MB, ",
+         current_.TypeName(false),
+         static_cast<double>(current_.start_object_size) / MB,
+         static_cast<double>(current_.start_memory_size) / MB,
+         static_cast<double>(current_.end_object_size) / MB,
+         static_cast<double>(current_.end_memory_size) / MB);
+
+  int external_time = static_cast<int>(current_.scopes[Scope::EXTERNAL]);
+  if (external_time > 0) PrintF("%d / ", external_time);
+
+  double duration = current_.end_time - current_.start_time;
+  PrintF("%.1f ms", duration);
+  if (current_.type == Event::SCAVENGER) {
+    int steps = current_.incremental_marking_steps -
+        previous_.incremental_marking_steps;
+    if (steps > 0) {
+      PrintF(" (+ %.1f ms in %d steps since last GC)",
+             current_.incremental_marking_duration -
+             previous_.incremental_marking_duration,
+             steps);
+    }
+  } else {
+    int steps = current_.incremental_marking_steps -
+        previous_mark_compactor_event_.incremental_marking_steps;
+    if (steps > 0) {
+      PrintF(" (+ %.1f ms in %d steps since start of marking, "
+             "biggest step %.1f ms)",
+             current_.incremental_marking_duration -
+             previous_mark_compactor_event_.incremental_marking_duration,
+             steps,
+             current_.longest_incremental_marking_step);
+    }
+  }
+
+  if (current_.gc_reason != NULL) {
+    PrintF(" [%s]", current_.gc_reason);
+  }
+
+  if (current_.collector_reason != NULL) {
+    PrintF(" [%s]", current_.collector_reason);
+  }
+
+  PrintF(".\n");
+}
+
+
+void GCTracer::PrintNVP() const {
+  PrintPID("%8.0f ms: ", heap_->isolate()->time_millis_since_init());
+
+  double duration = current_.end_time - current_.start_time;
+  double spent_in_mutator = current_.start_time - previous_.end_time;
+
+  PrintF("pause=%.1f ", duration);
+  PrintF("mutator=%.1f ", spent_in_mutator);
+  PrintF("gc=%s ", current_.TypeName(true));
+
+  PrintF("external=%.1f ", current_.scopes[Scope::EXTERNAL]);
+  PrintF("mark=%.1f ", current_.scopes[Scope::MC_MARK]);
+  PrintF("sweep=%.2f ", current_.scopes[Scope::MC_SWEEP]);
+  PrintF("sweepns=%.2f ", current_.scopes[Scope::MC_SWEEP_NEWSPACE]);
+  PrintF("sweepos=%.2f ", current_.scopes[Scope::MC_SWEEP_OLDSPACE]);
+  PrintF("sweepcode=%.2f ", current_.scopes[Scope::MC_SWEEP_CODE]);
+  PrintF("sweepcell=%.2f ", current_.scopes[Scope::MC_SWEEP_CELL]);
+  PrintF("sweepmap=%.2f ", current_.scopes[Scope::MC_SWEEP_MAP]);
+  PrintF("evacuate=%.1f ", current_.scopes[Scope::MC_EVACUATE_PAGES]);
+  PrintF("new_new=%.1f ",
+         current_.scopes[Scope::MC_UPDATE_NEW_TO_NEW_POINTERS]);
+  PrintF("root_new=%.1f ",
+         current_.scopes[Scope::MC_UPDATE_ROOT_TO_NEW_POINTERS]);
+  PrintF("old_new=%.1f ",
+         current_.scopes[Scope::MC_UPDATE_OLD_TO_NEW_POINTERS]);
+  PrintF("compaction_ptrs=%.1f ",
+         current_.scopes[Scope::MC_UPDATE_POINTERS_TO_EVACUATED]);
+  PrintF("intracompaction_ptrs=%.1f ",
+         current_.scopes[Scope::MC_UPDATE_POINTERS_BETWEEN_EVACUATED]);
+  PrintF("misc_compaction=%.1f ",
+         current_.scopes[Scope::MC_UPDATE_MISC_POINTERS]);
+  PrintF("weakcollection_process=%.1f ",
+         current_.scopes[Scope::MC_WEAKCOLLECTION_PROCESS]);
+  PrintF("weakcollection_clear=%.1f ",
+         current_.scopes[Scope::MC_WEAKCOLLECTION_CLEAR]);
+
+  PrintF("total_size_before=%" V8_PTR_PREFIX "d ", current_.start_object_size);
+  PrintF("total_size_after=%" V8_PTR_PREFIX "d ", current_.end_object_size);
+  PrintF("holes_size_before=%" V8_PTR_PREFIX "d ", current_.start_holes_size);
+  PrintF("holes_size_after=%" V8_PTR_PREFIX "d ", current_.end_holes_size);
+
+  intptr_t allocated_since_last_gc =
+      current_.start_object_size - previous_.end_object_size;
+  PrintF("allocated=%" V8_PTR_PREFIX "d ", allocated_since_last_gc);
+  PrintF("promoted=%" V8_PTR_PREFIX "d ", heap_->promoted_objects_size_);
+  PrintF("semi_space_copied=%" V8_PTR_PREFIX "d ",
+         heap_->semi_space_copied_object_size_);
+  PrintF("nodes_died_in_new=%d ", heap_->nodes_died_in_new_space_);
+  PrintF("nodes_copied_in_new=%d ", heap_->nodes_copied_in_new_space_);
+  PrintF("nodes_promoted=%d ", heap_->nodes_promoted_);
+  PrintF("promotion_rate=%.1f%% ", heap_->promotion_rate_);
+  PrintF("semi_space_copy_rate=%.1f%% ", heap_->semi_space_copied_rate_);
+
+  if (current_.type == Event::SCAVENGER) {
+    PrintF("stepscount=%d ", current_.incremental_marking_steps -
+           previous_.incremental_marking_steps);
+    PrintF("stepstook=%.1f ", current_.incremental_marking_duration -
+           previous_.incremental_marking_duration);
+  } else {
+    PrintF("stepscount=%d ", current_.incremental_marking_steps -
+           previous_mark_compactor_event_.incremental_marking_steps);
+    PrintF("stepstook=%.1f ", current_.incremental_marking_duration -
+           previous_mark_compactor_event_.incremental_marking_duration);
+    PrintF("longeststep=%.1f ", current_.longest_incremental_marking_step);
+  }
+
+  PrintF("\n");
+}
+
+} }  // namespace v8::internal