jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/gcTimer.hpp@55a0da3d420b (annotated)

src/share/vm/gc_implementation/shared/gcTimer.hpp@55a0da3d420b (annotated)

src/share/vm/gc_implementation/shared/gcTimer.hpp

Tue, 26 Nov 2013 14:35:38 +0100

author: sjohanss
date: Tue, 26 Nov 2013 14:35:38 +0100
changeset 6148: 55a0da3d420b
parent 5237: f2110083203d
child 6131: 86e6d691f2e1
permissions: -rw-r--r--

8027675: Full collections with Serial slower in JDK 8 compared to 7u40
Summary: Reduced the number of calls to follow_class_loader and instead marked and pushed the klass holder directly. Also removed unneeded calls to adjust_klass.
Reviewed-by: coleenp, jmasa, mgerdin, tschatzl

 /*
  * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GCTIMER_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_GCTIMER_HPP
 #include "memory/allocation.hpp"
 #include "prims/jni_md.h"
 #include "utilities/macros.hpp"
 class ConcurrentPhase;
 class GCPhase;
 class PausePhase;
 template <class E> class GrowableArray;
 class PhaseVisitor {
  public:
   virtual void visit(GCPhase* phase) = 0;
   virtual void visit(PausePhase* phase) { visit((GCPhase*)phase); }
   virtual void visit(ConcurrentPhase* phase) { visit((GCPhase*)phase); }
 };
 class GCPhase {
   const char* _name;
   int _level;
   jlong _start;
   jlong _end;
  public:
   void set_name(const char* name) { _name = name; }
   const char* name() { return _name; }
   int level() { return _level; }
   void set_level(int level) { _level = level; }
   jlong start() { return _start; }
   void set_start(jlong time) { _start = time; }
   jlong end() { return _end; }
   void set_end(jlong time) { _end = time; }
   virtual void accept(PhaseVisitor* visitor) = 0;
 };
 class PausePhase : public GCPhase {
  public:
   void accept(PhaseVisitor* visitor) {
     visitor->visit(this);
   }
 };
 class ConcurrentPhase : public GCPhase {
   void accept(PhaseVisitor* visitor) {
     visitor->visit(this);
   }
 };
 class PhasesStack {
  public:
   // FIXME: Temporary set to 5 (used to be 4), since Reference processing needs it.
   static const int PHASE_LEVELS = 5;
  private:
   int _phase_indices[PHASE_LEVELS];
   int _next_phase_level;
  public:
   PhasesStack() { clear(); }
   void clear();
   void push(int phase_index);
   int pop();
   int count() const;
 };
 class TimePartitions {
   static const int INITIAL_CAPACITY = 10;
   // Currently we only support pause phases.
   GrowableArray<PausePhase>* _phases;
   PhasesStack _active_phases;
   jlong _sum_of_pauses;
   jlong _longest_pause;
  public:
   TimePartitions();
   ~TimePartitions();
   void clear();
   void report_gc_phase_start(const char* name, jlong time);
   void report_gc_phase_end(jlong time);
   int num_phases() const;
   GCPhase* phase_at(int index) const;
   jlong sum_of_pauses();
   jlong longest_pause();
   bool has_active_phases();
  private:
   void update_statistics(GCPhase* phase);
 };
 class PhasesIterator {
  public:
   virtual bool has_next() = 0;
   virtual GCPhase* next() = 0;
 };
 class GCTimer : public ResourceObj {
   NOT_PRODUCT(friend class GCTimerTest;)
  protected:
   jlong _gc_start;
   jlong _gc_end;
   TimePartitions _time_partitions;
  public:
   virtual void register_gc_start(jlong time);
   virtual void register_gc_end(jlong time);
   void register_gc_phase_start(const char* name, jlong time);
   void register_gc_phase_end(jlong time);
   jlong gc_start() { return _gc_start; }
   jlong gc_end() { return _gc_end; }
   TimePartitions* time_partitions() { return &_time_partitions; }
   long longest_pause();
   long sum_of_pauses();
  protected:
   void register_gc_pause_start(const char* name, jlong time);
   void register_gc_pause_end(jlong time);
 };
 class STWGCTimer : public GCTimer {
  public:
   virtual void register_gc_start(jlong time);
   virtual void register_gc_end(jlong time);
 };
 class ConcurrentGCTimer : public GCTimer {
  public:
   void register_gc_pause_start(const char* name, jlong time);
   void register_gc_pause_end(jlong time);
 };
 class TimePartitionPhasesIterator {
   TimePartitions* _time_partitions;
   int _next;
  public:
   TimePartitionPhasesIterator(TimePartitions* time_partitions) : _time_partitions(time_partitions), _next(0) { }
   virtual bool has_next();
   virtual GCPhase* next();
 };
 /////////////// Unit tests ///////////////
 #ifndef PRODUCT
 class GCTimerAllTest {
  public:
   static void all();
 };
 #endif
 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GCTIMER_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/shared/gcTimer.hpp@55a0da3d420b (annotated)

src/share/vm/gc_implementation/shared/gcTimer.hpp