jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/survRateGroup.cpp@04ff2f6cd0eb (annotated)

src/share/vm/gc_implementation/g1/survRateGroup.cpp@04ff2f6cd0eb (annotated)

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

Tue, 17 Oct 2017 12:58:25 +0800

author: aoqi
date: Tue, 17 Oct 2017 12:58:25 +0800
changeset 7994: 04ff2f6cd0eb
parent 6876: 710a3c8b516e
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 2001, 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/g1CollectorPolicy.hpp"
 #include "gc_implementation/g1/heapRegion.hpp"
 #include "gc_implementation/g1/survRateGroup.hpp"
 #include "memory/allocation.hpp"
 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
 SurvRateGroup::SurvRateGroup(G1CollectorPolicy* g1p,
                              const char* name,
                              size_t summary_surv_rates_len) :
     _g1p(g1p), _name(name),
     _summary_surv_rates_len(summary_surv_rates_len),
     _summary_surv_rates_max_len(0),
     _summary_surv_rates(NULL),
     _surv_rate(NULL),
     _accum_surv_rate_pred(NULL),
     _surv_rate_pred(NULL),
     _stats_arrays_length(0) {
   reset();
   if (summary_surv_rates_len > 0) {
     size_t length = summary_surv_rates_len;
       _summary_surv_rates = NEW_C_HEAP_ARRAY(NumberSeq*, length, mtGC);
     for (size_t i = 0; i < length; ++i) {
       _summary_surv_rates[i] = new NumberSeq();
     }
   }
   start_adding_regions();
 }
 void SurvRateGroup::reset() {
   _all_regions_allocated = 0;
   _setup_seq_num         = 0;
   _accum_surv_rate       = 0.0;
   _last_pred             = 0.0;
   // the following will set up the arrays with length 1
   _region_num            = 1;
   // The call to stop_adding_regions() will use "new" to refill
   // the _surv_rate_pred array, so we need to make sure to call
   // "delete".
   for (size_t i = 0; i < _stats_arrays_length; ++i) {
     delete _surv_rate_pred[i];
   }
   _stats_arrays_length = 0;
   stop_adding_regions();
   guarantee( _stats_arrays_length == 1, "invariant" );
   guarantee( _surv_rate_pred[0] != NULL, "invariant" );
   _surv_rate_pred[0]->add(0.4);
   all_surviving_words_recorded(false);
   _region_num = 0;
 }
 void
 SurvRateGroup::start_adding_regions() {
   _setup_seq_num   = _stats_arrays_length;
   _region_num      = 0;
   _accum_surv_rate = 0.0;
 }
 void
 SurvRateGroup::stop_adding_regions() {
   if (_region_num > _stats_arrays_length) {
     double* old_surv_rate = _surv_rate;
     double* old_accum_surv_rate_pred = _accum_surv_rate_pred;
     TruncatedSeq** old_surv_rate_pred = _surv_rate_pred;
     _surv_rate = NEW_C_HEAP_ARRAY(double, _region_num, mtGC);
     _accum_surv_rate_pred = NEW_C_HEAP_ARRAY(double, _region_num, mtGC);
     _surv_rate_pred = NEW_C_HEAP_ARRAY(TruncatedSeq*, _region_num, mtGC);
     for (size_t i = 0; i < _stats_arrays_length; ++i) {
       _surv_rate_pred[i] = old_surv_rate_pred[i];
     }
     for (size_t i = _stats_arrays_length; i < _region_num; ++i) {
       _surv_rate_pred[i] = new TruncatedSeq(10);
     }
     _stats_arrays_length = _region_num;
     if (old_surv_rate != NULL) {
       FREE_C_HEAP_ARRAY(double, old_surv_rate, mtGC);
     }
     if (old_accum_surv_rate_pred != NULL) {
       FREE_C_HEAP_ARRAY(double, old_accum_surv_rate_pred, mtGC);
     }
     if (old_surv_rate_pred != NULL) {
       FREE_C_HEAP_ARRAY(TruncatedSeq*, old_surv_rate_pred, mtGC);
     }
   }
   for (size_t i = 0; i < _stats_arrays_length; ++i) {
     _surv_rate[i] = 0.0;
   }
 }
 double
 SurvRateGroup::accum_surv_rate(size_t adjustment) {
   // we might relax this one in the future...
   guarantee( adjustment == 0 || adjustment == 1, "pre-condition" );
   double ret = _accum_surv_rate;
   if (adjustment > 0) {
     TruncatedSeq* seq = get_seq(_region_num+1);
     double surv_rate = _g1p->get_new_prediction(seq);
     ret += surv_rate;
   }
   return ret;
 }
 int
 SurvRateGroup::next_age_index() {
   TruncatedSeq* seq = get_seq(_region_num);
   double surv_rate = _g1p->get_new_prediction(seq);
   _accum_surv_rate += surv_rate;
   ++_region_num;
   return (int) ++_all_regions_allocated;
 }
 void
 SurvRateGroup::record_surviving_words(int age_in_group, size_t surv_words) {
   guarantee( 0 <= age_in_group && (size_t) age_in_group < _region_num,
              "pre-condition" );
   guarantee( _surv_rate[age_in_group] <= 0.00001,
              "should only update each slot once" );
   double surv_rate = (double) surv_words / (double) HeapRegion::GrainWords;
   _surv_rate[age_in_group] = surv_rate;
   _surv_rate_pred[age_in_group]->add(surv_rate);
   if ((size_t)age_in_group < _summary_surv_rates_len) {
     _summary_surv_rates[age_in_group]->add(surv_rate);
     if ((size_t)(age_in_group+1) > _summary_surv_rates_max_len)
       _summary_surv_rates_max_len = age_in_group+1;
   }
 }
 void
 SurvRateGroup::all_surviving_words_recorded(bool propagate) {
   if (propagate && _region_num > 0) { // conservative
     double surv_rate = _surv_rate_pred[_region_num-1]->last();
     for (size_t i = _region_num; i < _stats_arrays_length; ++i) {
       guarantee( _surv_rate[i] <= 0.00001,
                  "the slot should not have been updated" );
       _surv_rate_pred[i]->add(surv_rate);
     }
   }
   double accum = 0.0;
   double pred = 0.0;
   for (size_t i = 0; i < _stats_arrays_length; ++i) {
     pred = _g1p->get_new_prediction(_surv_rate_pred[i]);
     if (pred > 1.0) pred = 1.0;
     accum += pred;
     _accum_surv_rate_pred[i] = accum;
     // gclog_or_tty->print_cr("age %3d, accum %10.2lf", i, accum);
   }
   _last_pred = pred;
 }
 #ifndef PRODUCT
 void
 SurvRateGroup::print() {
   gclog_or_tty->print_cr("Surv Rate Group: %s (%d entries)",
                 _name, _region_num);
   for (size_t i = 0; i < _region_num; ++i) {
     gclog_or_tty->print_cr("    age %4d   surv rate %6.2lf %%   pred %6.2lf %%",
                   i, _surv_rate[i] * 100.0,
                   _g1p->get_new_prediction(_surv_rate_pred[i]) * 100.0);
   }
 }
 void
 SurvRateGroup::print_surv_rate_summary() {
   size_t length = _summary_surv_rates_max_len;
   if (length == 0)
     return;
   gclog_or_tty->cr();
   gclog_or_tty->print_cr("%s Rate Summary (for up to age %d)", _name, length-1);
   gclog_or_tty->print_cr("      age range     survival rate (avg)      samples (avg)");
   gclog_or_tty->print_cr("  ---------------------------------------------------------");
   size_t index = 0;
   size_t limit = MIN2((int) length, 10);
   while (index < limit) {
     gclog_or_tty->print_cr("           %4d                 %6.2lf%%             %6.2lf",
                   index, _summary_surv_rates[index]->avg() * 100.0,
                   (double) _summary_surv_rates[index]->num());
     ++index;
   }
   gclog_or_tty->print_cr("  ---------------------------------------------------------");
   int num = 0;
   double sum = 0.0;
   int samples = 0;
   while (index < length) {
     ++num;
     sum += _summary_surv_rates[index]->avg() * 100.0;
     samples += _summary_surv_rates[index]->num();
     ++index;
     if (index == length || num % 10 == 0) {
       gclog_or_tty->print_cr("   %4d .. %4d                 %6.2lf%%             %6.2lf",
                     (index-1) / 10 * 10, index-1, sum / (double) num,
                     (double) samples / (double) num);
       sum = 0.0;
       num = 0;
       samples = 0;
     }
   }
   gclog_or_tty->print_cr("  ---------------------------------------------------------");
 }
 #endif // PRODUCT

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/survRateGroup.cpp@04ff2f6cd0eb (annotated)

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