jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1GCPhaseTimes.cpp@e2ed74d2e054 (annotated)

src/share/vm/gc_implementation/g1/g1GCPhaseTimes.cpp@e2ed74d2e054 (annotated)

src/share/vm/gc_implementation/g1/g1GCPhaseTimes.cpp

Tue, 19 Aug 2014 02:05:49 -0700

author: poonam
date: Tue, 19 Aug 2014 02:05:49 -0700
changeset 7452: e2ed74d2e054
parent 6680: 78bbf4d43a14
child 6876: 710a3c8b516e
child 6930: 570cb6369f17
permissions: -rw-r--r--

8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
Summary: Fill the last card that has been allocated into with a dummy object
Reviewed-by: tschatzl, mgerdin

 /*
  * Copyright (c) 2013, 2014 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.
  *
  */
 #include "precompiled.hpp"
 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
 #include "gc_implementation/g1/g1GCPhaseTimes.hpp"
 #include "gc_implementation/g1/g1Log.hpp"
 #include "gc_implementation/g1/g1StringDedup.hpp"
 // Helper class for avoiding interleaved logging
 class LineBuffer: public StackObj {
 private:
   static const int BUFFER_LEN = 1024;
   static const int INDENT_CHARS = 3;
   char _buffer[BUFFER_LEN];
   int _indent_level;
   int _cur;
   void vappend(const char* format, va_list ap)  ATTRIBUTE_PRINTF(2, 0) {
     int res = vsnprintf(&_buffer[_cur], BUFFER_LEN - _cur, format, ap);
     if (res != -1) {
       _cur += res;
     } else {
       DEBUG_ONLY(warning("buffer too small in LineBuffer");)
       _buffer[BUFFER_LEN -1] = 0;
       _cur = BUFFER_LEN; // vsnprintf above should not add to _buffer if we are called again
     }
   }
 public:
   explicit LineBuffer(int indent_level): _indent_level(indent_level), _cur(0) {
     for (; (_cur < BUFFER_LEN && _cur < (_indent_level * INDENT_CHARS)); _cur++) {
       _buffer[_cur] = ' ';
     }
   }
 #ifndef PRODUCT
   ~LineBuffer() {
     assert(_cur == _indent_level * INDENT_CHARS, "pending data in buffer - append_and_print_cr() not called?");
   }
 #endif
   void append(const char* format, ...)  ATTRIBUTE_PRINTF(2, 3) {
     va_list ap;
     va_start(ap, format);
     vappend(format, ap);
     va_end(ap);
   }
   void append_and_print_cr(const char* format, ...)  ATTRIBUTE_PRINTF(2, 3) {
     va_list ap;
     va_start(ap, format);
     vappend(format, ap);
     va_end(ap);
     gclog_or_tty->print_cr("%s", _buffer);
     _cur = _indent_level * INDENT_CHARS;
   }
 };
 PRAGMA_DIAG_PUSH
 PRAGMA_FORMAT_NONLITERAL_IGNORED
 template <class T>
 void WorkerDataArray<T>::print(int level, const char* title) {
   if (_length == 1) {
     // No need for min, max, average and sum for only one worker
     LineBuffer buf(level);
     buf.append("[%s:  ", title);
     buf.append(_print_format, _data[0]);
     buf.append_and_print_cr("]");
     return;
   }
   T min = _data[0];
   T max = _data[0];
   T sum = 0;
   LineBuffer buf(level);
   buf.append("[%s:", title);
   for (uint i = 0; i < _length; ++i) {
     T val = _data[i];
     min = MIN2(val, min);
     max = MAX2(val, max);
     sum += val;
     if (G1Log::finest()) {
       buf.append("  ");
       buf.append(_print_format, val);
     }
   }
   if (G1Log::finest()) {
     buf.append_and_print_cr("%s", "");
   }
   double avg = (double)sum / (double)_length;
   buf.append(" Min: ");
   buf.append(_print_format, min);
   buf.append(", Avg: ");
   buf.append("%.1lf", avg); // Always print average as a double
   buf.append(", Max: ");
   buf.append(_print_format, max);
   buf.append(", Diff: ");
   buf.append(_print_format, max - min);
   if (_print_sum) {
     // for things like the start and end times the sum is not
     // that relevant
     buf.append(", Sum: ");
     buf.append(_print_format, sum);
   }
   buf.append_and_print_cr("]");
 }
 PRAGMA_DIAG_POP
 #ifndef PRODUCT
 template <> const int WorkerDataArray<int>::_uninitialized = -1;
 template <> const double WorkerDataArray<double>::_uninitialized = -1.0;
 template <> const size_t WorkerDataArray<size_t>::_uninitialized = (size_t)-1;
 template <class T>
 void WorkerDataArray<T>::reset() {
   for (uint i = 0; i < _length; i++) {
     _data[i] = (T)_uninitialized;
   }
 }
 template <class T>
 void WorkerDataArray<T>::verify() {
   for (uint i = 0; i < _length; i++) {
     assert(_data[i] != _uninitialized,
         err_msg("Invalid data for worker " UINT32_FORMAT ", data: %lf, uninitialized: %lf",
             i, (double)_data[i], (double)_uninitialized));
   }
 }
 #endif
 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) :
   _max_gc_threads(max_gc_threads),
   _last_gc_worker_start_times_ms(_max_gc_threads, "%.1lf", false),
   _last_ext_root_scan_times_ms(_max_gc_threads, "%.1lf"),
   _last_satb_filtering_times_ms(_max_gc_threads, "%.1lf"),
   _last_update_rs_times_ms(_max_gc_threads, "%.1lf"),
   _last_update_rs_processed_buffers(_max_gc_threads, "%d"),
   _last_scan_rs_times_ms(_max_gc_threads, "%.1lf"),
   _last_strong_code_root_scan_times_ms(_max_gc_threads, "%.1lf"),
   _last_strong_code_root_mark_times_ms(_max_gc_threads, "%.1lf"),
   _last_obj_copy_times_ms(_max_gc_threads, "%.1lf"),
   _last_termination_times_ms(_max_gc_threads, "%.1lf"),
   _last_termination_attempts(_max_gc_threads, SIZE_FORMAT),
   _last_gc_worker_end_times_ms(_max_gc_threads, "%.1lf", false),
   _last_gc_worker_times_ms(_max_gc_threads, "%.1lf"),
   _last_gc_worker_other_times_ms(_max_gc_threads, "%.1lf"),
   _cur_string_dedup_queue_fixup_worker_times_ms(_max_gc_threads, "%.1lf"),
   _cur_string_dedup_table_fixup_worker_times_ms(_max_gc_threads, "%.1lf")
 {
   assert(max_gc_threads > 0, "Must have some GC threads");
 }
 void G1GCPhaseTimes::note_gc_start(uint active_gc_threads) {
   assert(active_gc_threads > 0, "The number of threads must be > 0");
   assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max nubmer of threads");
   _active_gc_threads = active_gc_threads;
   _last_gc_worker_start_times_ms.reset();
   _last_ext_root_scan_times_ms.reset();
   _last_satb_filtering_times_ms.reset();
   _last_update_rs_times_ms.reset();
   _last_update_rs_processed_buffers.reset();
   _last_scan_rs_times_ms.reset();
   _last_strong_code_root_scan_times_ms.reset();
   _last_strong_code_root_mark_times_ms.reset();
   _last_obj_copy_times_ms.reset();
   _last_termination_times_ms.reset();
   _last_termination_attempts.reset();
   _last_gc_worker_end_times_ms.reset();
   _last_gc_worker_times_ms.reset();
   _last_gc_worker_other_times_ms.reset();
 }
 void G1GCPhaseTimes::note_gc_end() {
   _last_gc_worker_start_times_ms.verify();
   _last_ext_root_scan_times_ms.verify();
   _last_satb_filtering_times_ms.verify();
   _last_update_rs_times_ms.verify();
   _last_update_rs_processed_buffers.verify();
   _last_scan_rs_times_ms.verify();
   _last_strong_code_root_scan_times_ms.verify();
   _last_strong_code_root_mark_times_ms.verify();
   _last_obj_copy_times_ms.verify();
   _last_termination_times_ms.verify();
   _last_termination_attempts.verify();
   _last_gc_worker_end_times_ms.verify();
   for (uint i = 0; i < _active_gc_threads; i++) {
     double worker_time = _last_gc_worker_end_times_ms.get(i) - _last_gc_worker_start_times_ms.get(i);
     _last_gc_worker_times_ms.set(i, worker_time);
     double worker_known_time = _last_ext_root_scan_times_ms.get(i) +
                                _last_satb_filtering_times_ms.get(i) +
                                _last_update_rs_times_ms.get(i) +
                                _last_scan_rs_times_ms.get(i) +
                                _last_strong_code_root_scan_times_ms.get(i) +
                                _last_strong_code_root_mark_times_ms.get(i) +
                                _last_obj_copy_times_ms.get(i) +
                                _last_termination_times_ms.get(i);
     double worker_other_time = worker_time - worker_known_time;
     _last_gc_worker_other_times_ms.set(i, worker_other_time);
   }
   _last_gc_worker_times_ms.verify();
   _last_gc_worker_other_times_ms.verify();
 }
 void G1GCPhaseTimes::note_string_dedup_fixup_start() {
   _cur_string_dedup_queue_fixup_worker_times_ms.reset();
   _cur_string_dedup_table_fixup_worker_times_ms.reset();
 }
 void G1GCPhaseTimes::note_string_dedup_fixup_end() {
   _cur_string_dedup_queue_fixup_worker_times_ms.verify();
   _cur_string_dedup_table_fixup_worker_times_ms.verify();
 }
 void G1GCPhaseTimes::print_stats(int level, const char* str, double value) {
   LineBuffer(level).append_and_print_cr("[%s: %.1lf ms]", str, value);
 }
 void G1GCPhaseTimes::print_stats(int level, const char* str, double value, uint workers) {
   LineBuffer(level).append_and_print_cr("[%s: %.1lf ms, GC Workers: " UINT32_FORMAT "]", str, value, workers);
 }
 double G1GCPhaseTimes::accounted_time_ms() {
     // Subtract the root region scanning wait time. It's initialized to
     // zero at the start of the pause.
     double misc_time_ms = _root_region_scan_wait_time_ms;
     misc_time_ms += _cur_collection_par_time_ms;
     // Now subtract the time taken to fix up roots in generated code
     misc_time_ms += _cur_collection_code_root_fixup_time_ms;
     // Strong code root migration time
     misc_time_ms += _cur_strong_code_root_migration_time_ms;
     // Strong code root purge time
     misc_time_ms += _cur_strong_code_root_purge_time_ms;
     if (G1StringDedup::is_enabled()) {
       // String dedup fixup time
       misc_time_ms += _cur_string_dedup_fixup_time_ms;
     }
     // Subtract the time taken to clean the card table from the
     // current value of "other time"
     misc_time_ms += _cur_clear_ct_time_ms;
     return misc_time_ms;
 }
 void G1GCPhaseTimes::print(double pause_time_sec) {
   if (_root_region_scan_wait_time_ms > 0.0) {
     print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms);
   }
   if (G1CollectedHeap::use_parallel_gc_threads()) {
     print_stats(1, "Parallel Time", _cur_collection_par_time_ms, _active_gc_threads);
     _last_gc_worker_start_times_ms.print(2, "GC Worker Start (ms)");
     _last_ext_root_scan_times_ms.print(2, "Ext Root Scanning (ms)");
     if (_last_satb_filtering_times_ms.sum() > 0.0) {
       _last_satb_filtering_times_ms.print(2, "SATB Filtering (ms)");
     }
     if (_last_strong_code_root_mark_times_ms.sum() > 0.0) {
      _last_strong_code_root_mark_times_ms.print(2, "Code Root Marking (ms)");
     }
     _last_update_rs_times_ms.print(2, "Update RS (ms)");
       _last_update_rs_processed_buffers.print(3, "Processed Buffers");
     _last_scan_rs_times_ms.print(2, "Scan RS (ms)");
     _last_strong_code_root_scan_times_ms.print(2, "Code Root Scanning (ms)");
     _last_obj_copy_times_ms.print(2, "Object Copy (ms)");
     _last_termination_times_ms.print(2, "Termination (ms)");
     if (G1Log::finest()) {
       _last_termination_attempts.print(3, "Termination Attempts");
     }
     _last_gc_worker_other_times_ms.print(2, "GC Worker Other (ms)");
     _last_gc_worker_times_ms.print(2, "GC Worker Total (ms)");
     _last_gc_worker_end_times_ms.print(2, "GC Worker End (ms)");
   } else {
     _last_ext_root_scan_times_ms.print(1, "Ext Root Scanning (ms)");
     if (_last_satb_filtering_times_ms.sum() > 0.0) {
       _last_satb_filtering_times_ms.print(1, "SATB Filtering (ms)");
     }
     if (_last_strong_code_root_mark_times_ms.sum() > 0.0) {
       _last_strong_code_root_mark_times_ms.print(1, "Code Root Marking (ms)");
     }
     _last_update_rs_times_ms.print(1, "Update RS (ms)");
       _last_update_rs_processed_buffers.print(2, "Processed Buffers");
     _last_scan_rs_times_ms.print(1, "Scan RS (ms)");
     _last_strong_code_root_scan_times_ms.print(1, "Code Root Scanning (ms)");
     _last_obj_copy_times_ms.print(1, "Object Copy (ms)");
   }
   print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms);
   print_stats(1, "Code Root Migration", _cur_strong_code_root_migration_time_ms);
   print_stats(1, "Code Root Purge", _cur_strong_code_root_purge_time_ms);
   if (G1StringDedup::is_enabled()) {
     print_stats(1, "String Dedup Fixup", _cur_string_dedup_fixup_time_ms, _active_gc_threads);
     _cur_string_dedup_queue_fixup_worker_times_ms.print(2, "Queue Fixup (ms)");
     _cur_string_dedup_table_fixup_worker_times_ms.print(2, "Table Fixup (ms)");
   }
   print_stats(1, "Clear CT", _cur_clear_ct_time_ms);
   double misc_time_ms = pause_time_sec * MILLIUNITS - accounted_time_ms();
   print_stats(1, "Other", misc_time_ms);
   if (_cur_verify_before_time_ms > 0.0) {
     print_stats(2, "Verify Before", _cur_verify_before_time_ms);
   }
   if (G1CollectedHeap::heap()->evacuation_failed()) {
     double evac_fail_handling = _cur_evac_fail_recalc_used + _cur_evac_fail_remove_self_forwards +
       _cur_evac_fail_restore_remsets;
     print_stats(2, "Evacuation Failure", evac_fail_handling);
     if (G1Log::finest()) {
       print_stats(3, "Recalculate Used", _cur_evac_fail_recalc_used);
       print_stats(3, "Remove Self Forwards", _cur_evac_fail_remove_self_forwards);
       print_stats(3, "Restore RemSet", _cur_evac_fail_restore_remsets);
     }
   }
   print_stats(2, "Choose CSet",
     (_recorded_young_cset_choice_time_ms +
     _recorded_non_young_cset_choice_time_ms));
   print_stats(2, "Ref Proc", _cur_ref_proc_time_ms);
   print_stats(2, "Ref Enq", _cur_ref_enq_time_ms);
   if (G1DeferredRSUpdate) {
     print_stats(2, "Redirty Cards", _recorded_redirty_logged_cards_time_ms);
   }
   print_stats(2, "Free CSet",
     (_recorded_young_free_cset_time_ms +
     _recorded_non_young_free_cset_time_ms));
   if (G1Log::finest()) {
     print_stats(3, "Young Free CSet", _recorded_young_free_cset_time_ms);
     print_stats(3, "Non-Young Free CSet", _recorded_non_young_free_cset_time_ms);
   }
   if (_cur_verify_after_time_ms > 0.0) {
     print_stats(2, "Verify After", _cur_verify_after_time_ms);
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/g1GCPhaseTimes.cpp@e2ed74d2e054 (annotated)

src/share/vm/gc_implementation/g1/g1GCPhaseTimes.cpp