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 /*

  * Copyright (c) 2012, 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_G1_G1GCPHASETIMESLOG_HPP

 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1GCPHASETIMESLOG_HPP

 #include "memory/allocation.hpp"

 #include "gc_interface/gcCause.hpp"

 template <class T>

 class WorkerDataArray  : public CHeapObj<mtGC> {

   T*          _data;

   uint        _length;

   const char* _print_format;

   bool        _print_sum;

   NOT_PRODUCT(static const T _uninitialized;)

   // We are caching the sum and average to only have to calculate them once.

   // This is not done in an MT-safe way. It is intetened to allow single

   // threaded code to call sum() and average() multiple times in any order

   // without having to worry about the cost.

   bool   _has_new_data;

   T      _sum;

   double _average;

  public:

   WorkerDataArray(uint length, const char* print_format, bool print_sum = true) :

   _length(length), _print_format(print_format), _print_sum(print_sum), _has_new_data(true) {

     assert(length > 0, "Must have some workers to store data for");

     _data = NEW_C_HEAP_ARRAY(T, _length, mtGC);

   }

   ~WorkerDataArray() {

     FREE_C_HEAP_ARRAY(T, _data, mtGC);

   }

   void set(uint worker_i, T value) {

     assert(worker_i < _length, err_msg("Worker %d is greater than max: %d", worker_i, _length));

     assert(_data[worker_i] == (T)-1, err_msg("Overwriting data for worker %d", worker_i));

     _data[worker_i] = value;

     _has_new_data = true;

   }

   T get(uint worker_i) {

     assert(worker_i < _length, err_msg("Worker %d is greater than max: %d", worker_i, _length));

     assert(_data[worker_i] != (T)-1, err_msg("No data to add to for worker %d", worker_i));

     return _data[worker_i];

   }

   void add(uint worker_i, T value) {

     assert(worker_i < _length, err_msg("Worker %d is greater than max: %d", worker_i, _length));

     assert(_data[worker_i] != (T)-1, err_msg("No data to add to for worker %d", worker_i));

     _data[worker_i] += value;

     _has_new_data = true;

   }

   double average(){

     if (_has_new_data) {

       calculate_totals();

     }

     return _average;

   }

   T sum() {

     if (_has_new_data) {

       calculate_totals();

     }

     return _sum;

   }

   void print(int level, const char* title);

   void reset() PRODUCT_RETURN;

   void verify() PRODUCT_RETURN;

  private:

   void calculate_totals(){

     _sum = (T)0;

     for (uint i = 0; i < _length; ++i) {

       _sum += _data[i];

     }

     _average = (double)_sum / (double)_length;

     _has_new_data = false;

   }

 };

 class G1GCPhaseTimes : public CHeapObj<mtGC> {

  private:

   uint _active_gc_threads;

   uint _max_gc_threads;

   WorkerDataArray<double> _last_gc_worker_start_times_ms;

   WorkerDataArray<double> _last_ext_root_scan_times_ms;

   WorkerDataArray<double> _last_satb_filtering_times_ms;

   WorkerDataArray<double> _last_update_rs_times_ms;

   WorkerDataArray<int>    _last_update_rs_processed_buffers;

   WorkerDataArray<double> _last_scan_rs_times_ms;

   WorkerDataArray<double> _last_obj_copy_times_ms;

   WorkerDataArray<double> _last_termination_times_ms;

   WorkerDataArray<size_t> _last_termination_attempts;

   WorkerDataArray<double> _last_gc_worker_end_times_ms;

   WorkerDataArray<double> _last_gc_worker_times_ms;

   WorkerDataArray<double> _last_gc_worker_other_times_ms;

   double _cur_collection_par_time_ms;

   double _cur_collection_code_root_fixup_time_ms;

   double _cur_clear_ct_time_ms;

   double _cur_ref_proc_time_ms;

   double _cur_ref_enq_time_ms;

   // Card Table Count Cache stats

   double _min_clear_cc_time_ms;         // min

   double _max_clear_cc_time_ms;         // max

   double _cur_clear_cc_time_ms;         // clearing time during current pause

   double _cum_clear_cc_time_ms;         // cummulative clearing time

   jlong  _num_cc_clears;                // number of times the card count cache has been cleared

   double _cur_collection_start_sec;

   double _root_region_scan_wait_time_ms;

   double _recorded_young_cset_choice_time_ms;

   double _recorded_non_young_cset_choice_time_ms;

   double _recorded_young_free_cset_time_ms;

   double _recorded_non_young_free_cset_time_ms;

   double _cur_verify_before_time_ms;

   double _cur_verify_after_time_ms;

   // Helper methods for detailed logging

   void print_stats(int level, const char* str, double value);

   void print_stats(int level, const char* str, double value, int workers);

  public:

   G1GCPhaseTimes(uint max_gc_threads);

   void note_gc_start(uint active_gc_threads);

   void note_gc_end();

   void print(double pause_time_sec);

   void record_gc_worker_start_time(uint worker_i, double ms) {

     _last_gc_worker_start_times_ms.set(worker_i, ms);

   }

   void record_ext_root_scan_time(uint worker_i, double ms) {

     _last_ext_root_scan_times_ms.set(worker_i, ms);

   }

   void record_satb_filtering_time(uint worker_i, double ms) {

     _last_satb_filtering_times_ms.set(worker_i, ms);

   }

   void record_update_rs_time(uint worker_i, double ms) {

     _last_update_rs_times_ms.set(worker_i, ms);

   }

   void record_update_rs_processed_buffers(uint worker_i, int processed_buffers) {

     _last_update_rs_processed_buffers.set(worker_i, processed_buffers);

   }

   void record_scan_rs_time(uint worker_i, double ms) {

     _last_scan_rs_times_ms.set(worker_i, ms);

   }

   void record_obj_copy_time(uint worker_i, double ms) {

     _last_obj_copy_times_ms.set(worker_i, ms);

   }

   void add_obj_copy_time(uint worker_i, double ms) {

     _last_obj_copy_times_ms.add(worker_i, ms);

   }

   void record_termination(uint worker_i, double ms, size_t attempts) {

     _last_termination_times_ms.set(worker_i, ms);

     _last_termination_attempts.set(worker_i, attempts);

   }

   void record_gc_worker_end_time(uint worker_i, double ms) {

     _last_gc_worker_end_times_ms.set(worker_i, ms);

   }

   void record_clear_ct_time(double ms) {

     _cur_clear_ct_time_ms = ms;

   }

   void record_par_time(double ms) {

     _cur_collection_par_time_ms = ms;

   }

   void record_code_root_fixup_time(double ms) {

     _cur_collection_code_root_fixup_time_ms = ms;

   }

   void record_ref_proc_time(double ms) {

     _cur_ref_proc_time_ms = ms;

   }

   void record_ref_enq_time(double ms) {

     _cur_ref_enq_time_ms = ms;

   }

   void record_root_region_scan_wait_time(double time_ms) {

     _root_region_scan_wait_time_ms = time_ms;

   }

   void record_cc_clear_time_ms(double ms);

   void record_young_free_cset_time_ms(double time_ms) {

     _recorded_young_free_cset_time_ms = time_ms;

   }

   void record_non_young_free_cset_time_ms(double time_ms) {

     _recorded_non_young_free_cset_time_ms = time_ms;

   }

   void record_young_cset_choice_time_ms(double time_ms) {

     _recorded_young_cset_choice_time_ms = time_ms;

   }

   void record_non_young_cset_choice_time_ms(double time_ms) {

     _recorded_non_young_cset_choice_time_ms = time_ms;

   }

   void record_cur_collection_start_sec(double time_ms) {

     _cur_collection_start_sec = time_ms;

   }

   void record_verify_before_time_ms(double time_ms) {

     _cur_verify_before_time_ms = time_ms;

   }

   void record_verify_after_time_ms(double time_ms) {

     _cur_verify_after_time_ms = time_ms;

   }

   double accounted_time_ms();

   double cur_collection_start_sec() {

     return _cur_collection_start_sec;

   }

   double cur_collection_par_time_ms() {

     return _cur_collection_par_time_ms;

   }

   double cur_clear_ct_time_ms() {

     return _cur_clear_ct_time_ms;

   }

   double root_region_scan_wait_time_ms() {

     return _root_region_scan_wait_time_ms;

   }

   double young_cset_choice_time_ms() {

     return _recorded_young_cset_choice_time_ms;

   }

   double young_free_cset_time_ms() {

     return _recorded_young_free_cset_time_ms;

   }

   double non_young_cset_choice_time_ms() {

     return _recorded_non_young_cset_choice_time_ms;

   }

   double non_young_free_cset_time_ms() {

     return _recorded_non_young_free_cset_time_ms;

   }

   double average_last_update_rs_time() {

     return _last_update_rs_times_ms.average();

   }

   int sum_last_update_rs_processed_buffers() {

     return _last_update_rs_processed_buffers.sum();

   }

   double average_last_scan_rs_time(){

     return _last_scan_rs_times_ms.average();

   }

   double average_last_obj_copy_time() {

     return _last_obj_copy_times_ms.average();

   }

   double average_last_termination_time() {

     return _last_termination_times_ms.average();

   }

   double average_last_ext_root_scan_time() {

     return _last_ext_root_scan_times_ms.average();

   }

   double average_last_satb_filtering_times_ms() {

     return _last_satb_filtering_times_ms.average();

   }

 };

 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1GCPHASETIMESLOG_HPP