rev 59956 : 8247819: G1: Process strong OopStorage entries in parallel
Reviewed-by:
Contributed-by: Erik Osterlund <erik.osterlund@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Thomas Schatzl <thomas.schatzl@oracle.com>

   1 /*
   2  * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_GC_SHARED_WORKERDATAARRAY_HPP
  26 #define SHARE_GC_SHARED_WORKERDATAARRAY_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include "utilities/debug.hpp"
  30 
  31 class outputStream;
  32 
  33 template <class T>
  34 class WorkerDataArray  : public CHeapObj<mtGC> {
  35   friend class WDAPrinter;
  36 public:
  37   static const uint MaxThreadWorkItems = 6;
  38 private:
  39   T*          _data;
  40   uint        _length;
  41   const char* _short_name; // Short name for JFR
  42   const char* _title; // Title for logging.
  43 
  44   bool _is_serial;
  45 
  46   WorkerDataArray<size_t>* _thread_work_items[MaxThreadWorkItems];
  47 
  48  public:
  49   WorkerDataArray(const char* short_name, const char* title, uint length, bool is_serial = false);
  50   ~WorkerDataArray();
  51 
  52   // Create an integer sub-item at the given index to this WorkerDataArray. If length_override
  53   // is zero, use the same number of elements as this array, otherwise use the given
  54   // number.
  55   void create_thread_work_items(const char* title, uint index = 0, uint length_override = 0);
  56 
  57   void set_thread_work_item(uint worker_i, size_t value, uint index = 0);
  58   void add_thread_work_item(uint worker_i, size_t value, uint index = 0);
  59   void set_or_add_thread_work_item(uint worker_i, size_t value, uint index = 0);
  60   size_t get_thread_work_item(uint worker_i, uint index = 0);
  61 
  62   WorkerDataArray<size_t>* thread_work_items(uint index = 0) const {
  63     assert(index < MaxThreadWorkItems, "Tried to access thread work item %u max %u", index, MaxThreadWorkItems);
  64     return _thread_work_items[index];
  65   }
  66 
  67   static T uninitialized();
  68 
  69   void set(uint worker_i, T value);
  70   T get(uint worker_i) const;
  71 
  72   void add(uint worker_i, T value);
  73 
  74   // The sum() and average() methods below consider uninitialized slots to be 0.
  75   double average() const;
  76   T sum() const;
  77 
  78   const char* title() const {
  79     return _title;
  80   }
  81 
  82   const char* short_name() const {
  83     return _short_name;
  84   }
  85 
  86   void reset();
  87   void set_all(T value);
  88 
  89 
  90  private:
  91   class WDAPrinter {
  92   public:
  93     static void summary(outputStream* out, double time);
  94     static void summary(outputStream* out, double min, double avg, double max, double diff, double sum, bool print_sum);
  95     static void summary(outputStream* out, size_t value);
  96     static void summary(outputStream* out, size_t min, double avg, size_t max, size_t diff, size_t sum, bool print_sum);
  97 
  98     static void details(const WorkerDataArray<double>* phase, outputStream* out);
  99     static void details(const WorkerDataArray<size_t>* phase, outputStream* out);
 100   };
 101 
 102  public:
 103   void print_summary_on(outputStream* out, bool print_sum = true) const;
 104   void print_details_on(outputStream* out) const;
 105 };
 106 
 107 #endif // SHARE_GC_SHARED_WORKERDATAARRAY_HPP
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