Add max post-gc heap usage metrics

runtime/vm/pages.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/pages.h"
 
 #include "platform/assert.h"
 #include "vm/compiler_stats.h"
 #include "vm/gc_marker.h"
 #include "vm/gc_sweeper.h"
@@ skipping 153 matching lines @@
       iterating_thread_(NULL),
 #endif
       page_space_controller_(heap,
                              FLAG_old_gen_growth_space_ratio,
                              FLAG_old_gen_growth_rate,
                              FLAG_old_gen_growth_time_ratio),
       gc_time_micros_(0),
       collections_(0) {
   // We aren't holding the lock but no one can reference us yet.
   UpdateMaxCapacityLocked();
+  UpdateMaxUsed();
 }
 
 
 PageSpace::~PageSpace() {
   {
     MonitorLocker ml(tasks_lock());
     while (tasks() > 0) {
       ml.Wait();
     }
   }
@@ skipping 356 matching lines @@
     return;
   }
   ASSERT(heap_ != NULL);
   ASSERT(heap_->isolate() != NULL);
   Isolate* isolate = heap_->isolate();
   isolate->GetHeapOldCapacityMaxMetric()->SetValue(
       static_cast<int64_t>(usage_.capacity_in_words) * kWordSize);
 }
 
 
+void PageSpace::UpdateMaxUsed() {
+  if (heap_ == NULL) {
+    // Some unit tests.
+    return;
+  }
+  ASSERT(heap_ != NULL);
+  ASSERT(heap_->isolate() != NULL);
+  Isolate* isolate = heap_->isolate();
+  isolate->GetHeapOldUsedMaxMetric()->SetValue(
+      static_cast<int64_t>(UsedInWords()) * kWordSize);
+}
+
+
+void PageSpace::UpdateGlobalMaxUsed() {
+  if (heap_ == NULL) {
+    // Some unit tests.
+    return;
+  }
+  ASSERT(heap_ != NULL);
+  ASSERT(heap_->isolate() != NULL);
+  Isolate* isolate = heap_->isolate();
+  isolate->GetHeapGlobalUsedMaxMetric()->SetValue(
+      (static_cast<int64_t>(heap_->UsedInWords(Heap::kNew)) * kWordSize) +
+      (static_cast<int64_t>(heap_->UsedInWords(Heap::kOld)) * kWordSize));
+}
+
+
 bool PageSpace::Contains(uword addr) const {
   for (ExclusivePageIterator it(this); !it.Done(); it.Advance()) {
     if (it.page()->Contains(addr)) {
       return true;
     }
   }
   return false;
 }
 
 
@@ skipping 365 matching lines @@
   heap_->RecordTime(kSweepPages, mid3 - mid2);
   heap_->RecordTime(kSweepLargePages, end - mid3);
 
   if (FLAG_print_free_list_after_gc) {
     OS::Print("Data Freelist (after GC):\n");
     freelist_[HeapPage::kData].Print();
     OS::Print("Executable Freelist (after GC):\n");
     freelist_[HeapPage::kExecutable].Print();
   }
 
+  UpdateMaxUsed();
+  UpdateGlobalMaxUsed();
+
   isolate->thread_registry()->ResumeAllThreads();
 
   // Done, reset the task count.
   {
     MonitorLocker ml(tasks_lock());
     set_tasks(tasks() - 1);
     ml.Notify();
   }
 }
 
@@ skipping 249 matching lines @@
     return 0;
   } else {
     ASSERT(total_time >= gc_time);
     int result = static_cast<int>((static_cast<double>(gc_time) /
                                    static_cast<double>(total_time)) * 100);
     return result;
   }
 }
 
 }  // namespace dart