jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1GCPhaseTimes.cpp@4967eb4f67a9 (annotated)

src/share/vm/gc_implementation/g1/g1GCPhaseTimes.cpp@4967eb4f67a9 (annotated)

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

Tue, 15 Jan 2013 12:32:26 -0800

author: johnc
date: Tue, 15 Jan 2013 12:32:26 -0800
changeset 4455: 4967eb4f67a9
parent 4097: 5baec2e69518
child 4475: 7df93f7c14a5
permissions: -rw-r--r--

8001425: G1: Change the default values for certain G1 specific flags
Summary: Changes to default and ergonomic flag values recommended by performance team. Changes were also reviewed by Monica Beckwith <monica.beckwith@oracle.com>.
Reviewed-by: brutisso, huntch

 /*
  * 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.
  *
  */
 #include "precompiled.hpp"
 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
 #include "gc_implementation/g1/g1GCPhaseTimes.hpp"
 #include "gc_implementation/g1/g1Log.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) {
     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, ...) {
     va_list ap;
     va_start(ap, format);
     vappend(format, ap);
     va_end(ap);
   }
   void append_and_print_cr(const char* format, ...) {
     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;
   }
 };
 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("");
   }
   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("]");
 }
 #ifndef PRODUCT
 template <class T>
 void WorkerDataArray<T>::reset() {
   for (uint i = 0; i < _length; i++) {
     _data[i] = (T)-1;
   }
 }
 template <class T>
 void WorkerDataArray<T>::verify() {
   for (uint i = 0; i < _length; i++) {
     assert(_data[i] >= (T)0, err_msg("Invalid data for worker %d", i));
   }
 }
 #endif
 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) :
   _max_gc_threads(max_gc_threads),
   _min_clear_cc_time_ms(-1.0),
   _max_clear_cc_time_ms(-1.0),
   _cur_clear_cc_time_ms(0.0),
   _cum_clear_cc_time_ms(0.0),
   _num_cc_clears(0L),
   _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_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")
 {
   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_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_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_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::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, int workers) {
   LineBuffer(level).append_and_print_cr("[%s: %.1lf ms, GC Workers: %d]", 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;
     // 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)");
     }
     _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_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)");
     }
     _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_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, "Clear CT", _cur_clear_ct_time_ms);
   if (Verbose && G1Log::finest()) {
     print_stats(1, "Cur Clear CC", _cur_clear_cc_time_ms);
     print_stats(1, "Cum Clear CC", _cum_clear_cc_time_ms);
     print_stats(1, "Min Clear CC", _min_clear_cc_time_ms);
     print_stats(1, "Max Clear CC", _max_clear_cc_time_ms);
     if (_num_cc_clears > 0) {
       print_stats(1, "Avg Clear CC", _cum_clear_cc_time_ms / ((double)_num_cc_clears));
     }
   }
   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);
   }
   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);
   print_stats(2, "Free CSet",
     (_recorded_young_free_cset_time_ms +
     _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);
   }
 }
 void G1GCPhaseTimes::record_cc_clear_time_ms(double ms) {
   if (!(Verbose && G1Log::finest())) {
     return;
   }
   if (_min_clear_cc_time_ms < 0.0 || ms <= _min_clear_cc_time_ms) {
     _min_clear_cc_time_ms = ms;
   }
   if (_max_clear_cc_time_ms < 0.0 || ms >= _max_clear_cc_time_ms) {
     _max_clear_cc_time_ms = ms;
   }
   _cur_clear_cc_time_ms = ms;
   _cum_clear_cc_time_ms += ms;
   _num_cc_clears++;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/g1GCPhaseTimes.cpp@4967eb4f67a9 (annotated)

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