author | mgerdin |
Thu, 04 Feb 2016 08:22:26 +0100 | |
changeset 36191 | 07d2ba48d1d3 |
parent 36102 | 84546518799d |
child 36365 | bcc9c9afda49 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#include "precompiled.hpp" |
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#include "gc/g1/concurrentG1Refine.hpp" |
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#include "gc/g1/concurrentMarkThread.inline.hpp" |
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#include "gc/g1/g1CollectedHeap.inline.hpp" |
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#include "gc/g1/g1CollectorPolicy.hpp" |
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#include "gc/g1/g1ConcurrentMark.hpp" |
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#include "gc/g1/g1IHOPControl.hpp" |
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#include "gc/g1/g1GCPhaseTimes.hpp" |
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#include "gc/g1/heapRegion.inline.hpp" |
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#include "gc/g1/heapRegionRemSet.hpp" |
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#include "gc/shared/gcPolicyCounters.hpp" |
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#include "runtime/arguments.hpp" |
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#include "runtime/java.hpp" |
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#include "runtime/mutexLocker.hpp" |
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#include "utilities/debug.hpp" |
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#include "utilities/pair.hpp" |
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// Different defaults for different number of GC threads |
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// They were chosen by running GCOld and SPECjbb on debris with different |
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// numbers of GC threads and choosing them based on the results |
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// all the same |
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static double rs_length_diff_defaults[] = { |
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0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 |
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}; |
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static double cost_per_card_ms_defaults[] = { |
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0.01, 0.005, 0.005, 0.003, 0.003, 0.002, 0.002, 0.0015 |
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}; |
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// all the same |
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static double young_cards_per_entry_ratio_defaults[] = { |
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1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0 |
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}; |
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static double cost_per_entry_ms_defaults[] = { |
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0.015, 0.01, 0.01, 0.008, 0.008, 0.0055, 0.0055, 0.005 |
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}; |
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static double cost_per_byte_ms_defaults[] = { |
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0.00006, 0.00003, 0.00003, 0.000015, 0.000015, 0.00001, 0.00001, 0.000009 |
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}; |
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// these should be pretty consistent |
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static double constant_other_time_ms_defaults[] = { |
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5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0 |
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}; |
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static double young_other_cost_per_region_ms_defaults[] = { |
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0.3, 0.2, 0.2, 0.15, 0.15, 0.12, 0.12, 0.1 |
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}; |
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static double non_young_other_cost_per_region_ms_defaults[] = { |
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1.0, 0.7, 0.7, 0.5, 0.5, 0.42, 0.42, 0.30 |
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}; |
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G1CollectorPolicy::G1CollectorPolicy() : |
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_predictor(G1ConfidencePercent / 100.0), |
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_recent_gc_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), |
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_concurrent_mark_remark_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), |
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_concurrent_mark_cleanup_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)), |
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_alloc_rate_ms_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_prev_collection_pause_end_ms(0.0), |
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_rs_length_diff_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_cost_per_card_ms_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_cost_scan_hcc_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_young_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_mixed_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_mixed_cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_cost_per_byte_ms_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_cost_per_byte_ms_during_cm_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_constant_other_time_ms_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_young_other_cost_per_region_ms_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_non_young_other_cost_per_region_ms_seq( |
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new TruncatedSeq(TruncatedSeqLength)), |
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_pending_cards_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_rs_lengths_seq(new TruncatedSeq(TruncatedSeqLength)), |
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_pause_time_target_ms((double) MaxGCPauseMillis), |
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_recent_prev_end_times_for_all_gcs_sec( |
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new TruncatedSeq(NumPrevPausesForHeuristics)), |
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_recent_avg_pause_time_ratio(0.0), |
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_rs_lengths_prediction(0), |
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_max_survivor_regions(0), |
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_eden_cset_region_length(0), |
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_survivor_cset_region_length(0), |
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_old_cset_region_length(0), |
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_collection_set(NULL), |
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_collection_set_bytes_used_before(0), |
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// Incremental CSet attributes |
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_inc_cset_build_state(Inactive), |
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_inc_cset_head(NULL), |
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_inc_cset_tail(NULL), |
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_inc_cset_bytes_used_before(0), |
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_inc_cset_recorded_rs_lengths(0), |
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_inc_cset_recorded_rs_lengths_diffs(0), |
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_inc_cset_predicted_elapsed_time_ms(0.0), |
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_inc_cset_predicted_elapsed_time_ms_diffs(0.0), |
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// add here any more surv rate groups |
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_recorded_survivor_regions(0), |
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_recorded_survivor_head(NULL), |
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_recorded_survivor_tail(NULL), |
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_survivors_age_table(true), |
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_gc_overhead_perc(0.0), |
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_bytes_allocated_in_old_since_last_gc(0), |
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_ihop_control(NULL), |
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_initial_mark_to_mixed() { |
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// SurvRateGroups below must be initialized after the predictor because they |
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// indirectly use it through this object passed to their constructor. |
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_short_lived_surv_rate_group = |
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new SurvRateGroup(&_predictor, "Short Lived", G1YoungSurvRateNumRegionsSummary); |
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_survivor_surv_rate_group = |
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new SurvRateGroup(&_predictor, "Survivor", G1YoungSurvRateNumRegionsSummary); |
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// Set up the region size and associated fields. Given that the |
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// policy is created before the heap, we have to set this up here, |
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// so it's done as soon as possible. |
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// It would have been natural to pass initial_heap_byte_size() and |
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// max_heap_byte_size() to setup_heap_region_size() but those have |
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// not been set up at this point since they should be aligned with |
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// the region size. So, there is a circular dependency here. We base |
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// the region size on the heap size, but the heap size should be |
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// aligned with the region size. To get around this we use the |
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// unaligned values for the heap. |
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HeapRegion::setup_heap_region_size(InitialHeapSize, MaxHeapSize); |
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HeapRegionRemSet::setup_remset_size(); |
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_recent_prev_end_times_for_all_gcs_sec->add(os::elapsedTime()); |
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_prev_collection_pause_end_ms = os::elapsedTime() * 1000.0; |
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clear_ratio_check_data(); |
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_phase_times = new G1GCPhaseTimes(ParallelGCThreads); |
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int index = MIN2(ParallelGCThreads - 1, 7u); |
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_rs_length_diff_seq->add(rs_length_diff_defaults[index]); |
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_cost_per_card_ms_seq->add(cost_per_card_ms_defaults[index]); |
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_cost_scan_hcc_seq->add(0.0); |
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_young_cards_per_entry_ratio_seq->add( |
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young_cards_per_entry_ratio_defaults[index]); |
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_cost_per_entry_ms_seq->add(cost_per_entry_ms_defaults[index]); |
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_cost_per_byte_ms_seq->add(cost_per_byte_ms_defaults[index]); |
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_constant_other_time_ms_seq->add(constant_other_time_ms_defaults[index]); |
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_young_other_cost_per_region_ms_seq->add( |
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young_other_cost_per_region_ms_defaults[index]); |
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_non_young_other_cost_per_region_ms_seq->add( |
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non_young_other_cost_per_region_ms_defaults[index]); |
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||
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// Below, we might need to calculate the pause time target based on |
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// the pause interval. When we do so we are going to give G1 maximum |
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// flexibility and allow it to do pauses when it needs to. So, we'll |
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// arrange that the pause interval to be pause time target + 1 to |
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// ensure that a) the pause time target is maximized with respect to |
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// the pause interval and b) we maintain the invariant that pause |
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// time target < pause interval. If the user does not want this |
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// maximum flexibility, they will have to set the pause interval |
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// explicitly. |
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|
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199 |
// First make sure that, if either parameter is set, its value is |
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200 |
// reasonable. |
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201 |
if (!FLAG_IS_DEFAULT(MaxGCPauseMillis)) { |
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202 |
if (MaxGCPauseMillis < 1) { |
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203 |
vm_exit_during_initialization("MaxGCPauseMillis should be " |
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204 |
"greater than 0"); |
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205 |
} |
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206 |
} |
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207 |
if (!FLAG_IS_DEFAULT(GCPauseIntervalMillis)) { |
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208 |
if (GCPauseIntervalMillis < 1) { |
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|
209 |
vm_exit_during_initialization("GCPauseIntervalMillis should be " |
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|
210 |
"greater than 0"); |
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|
211 |
} |
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212 |
} |
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|
213 |
|
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|
214 |
// Then, if the pause time target parameter was not set, set it to |
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|
215 |
// the default value. |
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|
216 |
if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) { |
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|
217 |
if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) { |
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218 |
// The default pause time target in G1 is 200ms |
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219 |
FLAG_SET_DEFAULT(MaxGCPauseMillis, 200); |
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220 |
} else { |
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|
221 |
// We do not allow the pause interval to be set without the |
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|
222 |
// pause time target |
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|
223 |
vm_exit_during_initialization("GCPauseIntervalMillis cannot be set " |
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|
224 |
"without setting MaxGCPauseMillis"); |
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225 |
} |
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226 |
} |
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|
227 |
|
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|
228 |
// Then, if the interval parameter was not set, set it according to |
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|
229 |
// the pause time target (this will also deal with the case when the |
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|
230 |
// pause time target is the default value). |
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|
231 |
if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) { |
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|
232 |
FLAG_SET_DEFAULT(GCPauseIntervalMillis, MaxGCPauseMillis + 1); |
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|
233 |
} |
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|
234 |
|
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|
235 |
// Finally, make sure that the two parameters are consistent. |
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|
236 |
if (MaxGCPauseMillis >= GCPauseIntervalMillis) { |
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|
237 |
char buffer[256]; |
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|
238 |
jio_snprintf(buffer, 256, |
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|
239 |
"MaxGCPauseMillis (%u) should be less than " |
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|
240 |
"GCPauseIntervalMillis (%u)", |
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|
241 |
MaxGCPauseMillis, GCPauseIntervalMillis); |
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|
242 |
vm_exit_during_initialization(buffer); |
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|
243 |
} |
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|
244 |
|
2741 | 245 |
double max_gc_time = (double) MaxGCPauseMillis / 1000.0; |
5890
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|
246 |
double time_slice = (double) GCPauseIntervalMillis / 1000.0; |
1374 | 247 |
_mmu_tracker = new G1MMUTrackerQueue(time_slice, max_gc_time); |
15806
f3fb856749cf
8008546: Wrong G1ConfidencePercent results in GUARANTEE(VARIANCE() > -1.0) FAILED
poonam
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|
248 |
|
1374 | 249 |
// start conservatively (around 50ms is about right) |
250 |
_concurrent_mark_remark_times_ms->add(0.05); |
|
251 |
_concurrent_mark_cleanup_times_ms->add(0.20); |
|
252 |
_tenuring_threshold = MaxTenuringThreshold; |
|
2009 | 253 |
|
5240 | 254 |
assert(GCTimeRatio > 0, |
255 |
"we should have set it to a default value set_g1_gc_flags() " |
|
256 |
"if a user set it to 0"); |
|
257 |
_gc_overhead_perc = 100.0 * (1.0 / (1.0 + GCTimeRatio)); |
|
258 |
||
10528
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259 |
uintx reserve_perc = G1ReservePercent; |
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|
260 |
// Put an artificial ceiling on this so that it's not set to a silly value. |
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|
261 |
if (reserve_perc > 50) { |
06fab03478df
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|
262 |
reserve_perc = 50; |
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|
263 |
warning("G1ReservePercent is set to a value that is too large, " |
30272
8cbe337a692c
8042891: Format issues embedded in macros for two g1 source files
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|
264 |
"it's been updated to " UINTX_FORMAT, reserve_perc); |
10528
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|
265 |
} |
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|
266 |
_reserve_factor = (double) reserve_perc / 100.0; |
10529
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|
267 |
// This will be set when the heap is expanded |
10528
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|
268 |
// for the first time during initialization. |
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|
269 |
_reserve_regions = 0; |
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|
270 |
|
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|
271 |
_cset_chooser = new CollectionSetChooser(); |
21561
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|
272 |
} |
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|
273 |
|
34298
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8136681: Factor out IHOP calculation from G1CollectorPolicy
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|
274 |
G1CollectorPolicy::~G1CollectorPolicy() { |
f3c9dcc5af96
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|
275 |
delete _ihop_control; |
f3c9dcc5af96
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|
276 |
} |
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|
277 |
|
33214
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|
278 |
double G1CollectorPolicy::get_new_prediction(TruncatedSeq const* seq) const { |
5a00fba36171
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|
279 |
return _predictor.get_new_prediction(seq); |
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|
280 |
} |
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|
281 |
|
35196
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|
282 |
size_t G1CollectorPolicy::get_new_size_prediction(TruncatedSeq const* seq) const { |
c83940b346b2
8143215: gcc 4.1.2: fix three issues breaking the build.
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|
283 |
return (size_t)get_new_prediction(seq); |
c83940b346b2
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|
284 |
} |
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|
285 |
|
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|
286 |
void G1CollectorPolicy::initialize_alignments() { |
c619b1cb4554
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|
287 |
_space_alignment = HeapRegion::GrainBytes; |
33212 | 288 |
size_t card_table_alignment = CardTableRS::ct_max_alignment_constraint(); |
21561
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|
289 |
size_t page_size = UseLargePages ? os::large_page_size() : os::vm_page_size(); |
c619b1cb4554
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|
290 |
_heap_alignment = MAX3(card_table_alignment, _space_alignment, page_size); |
1374 | 291 |
} |
292 |
||
36102
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|
293 |
G1CollectorState* G1CollectorPolicy::collector_state() const { return _g1->collector_state(); } |
84546518799d
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|
294 |
|
84546518799d
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|
295 |
// There are three command line options related to the young gen size: |
84546518799d
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parents:
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diff
changeset
|
296 |
// NewSize, MaxNewSize and NewRatio (There is also -Xmn, but that is |
84546518799d
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ehelin
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|
297 |
// just a short form for NewSize==MaxNewSize). G1 will use its internal |
84546518799d
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ehelin
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|
298 |
// heuristics to calculate the actual young gen size, so these options |
84546518799d
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ehelin
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|
299 |
// basically only limit the range within which G1 can pick a young gen |
84546518799d
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ehelin
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|
300 |
// size. Also, these are general options taking byte sizes. G1 will |
84546518799d
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ehelin
parents:
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diff
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|
301 |
// internally work with a number of regions instead. So, some rounding |
84546518799d
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ehelin
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|
302 |
// will occur. |
84546518799d
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ehelin
parents:
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|
303 |
// |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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|
304 |
// If nothing related to the the young gen size is set on the command |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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diff
changeset
|
305 |
// line we should allow the young gen to be between G1NewSizePercent |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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diff
changeset
|
306 |
// and G1MaxNewSizePercent of the heap size. This means that every time |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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diff
changeset
|
307 |
// the heap size changes, the limits for the young gen size will be |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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diff
changeset
|
308 |
// recalculated. |
84546518799d
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ehelin
parents:
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diff
changeset
|
309 |
// |
84546518799d
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ehelin
parents:
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changeset
|
310 |
// If only -XX:NewSize is set we should use the specified value as the |
84546518799d
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ehelin
parents:
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diff
changeset
|
311 |
// minimum size for young gen. Still using G1MaxNewSizePercent of the |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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diff
changeset
|
312 |
// heap as maximum. |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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diff
changeset
|
313 |
// |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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changeset
|
314 |
// If only -XX:MaxNewSize is set we should use the specified value as the |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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diff
changeset
|
315 |
// maximum size for young gen. Still using G1NewSizePercent of the heap |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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diff
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|
316 |
// as minimum. |
84546518799d
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ehelin
parents:
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diff
changeset
|
317 |
// |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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changeset
|
318 |
// If -XX:NewSize and -XX:MaxNewSize are both specified we use these values. |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
319 |
// No updates when the heap size changes. There is a special case when |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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diff
changeset
|
320 |
// NewSize==MaxNewSize. This is interpreted as "fixed" and will use a |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
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|
321 |
// different heuristic for calculating the collection set when we do mixed |
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|
322 |
// collection. |
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|
323 |
// |
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|
324 |
// If only -XX:NewRatio is set we should use the specified ratio of the heap |
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|
325 |
// as both min and max. This will be interpreted as "fixed" just like the |
84546518799d
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|
326 |
// NewSize==MaxNewSize case above. But we will update the min and max |
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|
327 |
// every time the heap size changes. |
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|
328 |
// |
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diff
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|
329 |
// NewSize and MaxNewSize override NewRatio. So, NewRatio is ignored if it is |
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|
330 |
// combined with either NewSize or MaxNewSize. (A warning message is printed.) |
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|
331 |
class G1YoungGenSizer : public CHeapObj<mtGC> { |
84546518799d
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|
332 |
private: |
84546518799d
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changeset
|
333 |
enum SizerKind { |
84546518799d
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parents:
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diff
changeset
|
334 |
SizerDefaults, |
84546518799d
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parents:
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diff
changeset
|
335 |
SizerNewSizeOnly, |
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|
336 |
SizerMaxNewSizeOnly, |
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|
337 |
SizerMaxAndNewSize, |
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parents:
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changeset
|
338 |
SizerNewRatio |
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|
339 |
}; |
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changeset
|
340 |
SizerKind _sizer_kind; |
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|
341 |
uint _min_desired_young_length; |
84546518799d
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|
342 |
uint _max_desired_young_length; |
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|
343 |
bool _adaptive_size; |
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|
344 |
uint calculate_default_min_length(uint new_number_of_heap_regions); |
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|
345 |
uint calculate_default_max_length(uint new_number_of_heap_regions); |
84546518799d
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changeset
|
346 |
|
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parents:
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diff
changeset
|
347 |
// Update the given values for minimum and maximum young gen length in regions |
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|
348 |
// given the number of heap regions depending on the kind of sizing algorithm. |
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|
349 |
void recalculate_min_max_young_length(uint number_of_heap_regions, uint* min_young_length, uint* max_young_length); |
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changeset
|
350 |
|
84546518799d
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parents:
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changeset
|
351 |
public: |
84546518799d
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changeset
|
352 |
G1YoungGenSizer(); |
84546518799d
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changeset
|
353 |
// Calculate the maximum length of the young gen given the number of regions |
84546518799d
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changeset
|
354 |
// depending on the sizing algorithm. |
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changeset
|
355 |
uint max_young_length(uint number_of_heap_regions); |
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changeset
|
356 |
|
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parents:
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changeset
|
357 |
void heap_size_changed(uint new_number_of_heap_regions); |
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changeset
|
358 |
uint min_desired_young_length() { |
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changeset
|
359 |
return _min_desired_young_length; |
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changeset
|
360 |
} |
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parents:
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diff
changeset
|
361 |
uint max_desired_young_length() { |
84546518799d
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ehelin
parents:
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changeset
|
362 |
return _max_desired_young_length; |
21561
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
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changeset
|
363 |
} |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
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parents:
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diff
changeset
|
364 |
|
36102
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parents:
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changeset
|
365 |
bool adaptive_young_list_length() const { |
84546518799d
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ehelin
parents:
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changeset
|
366 |
return _adaptive_size; |
2011
d666454081dd
6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy()
apetrusenko
parents:
2009
diff
changeset
|
367 |
} |
36102
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changeset
|
368 |
}; |
1374 | 369 |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
370 |
|
21561
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8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
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changeset
|
371 |
G1YoungGenSizer::G1YoungGenSizer() : _sizer_kind(SizerDefaults), _adaptive_size(true), |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
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diff
changeset
|
372 |
_min_desired_young_length(0), _max_desired_young_length(0) { |
11397
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changeset
|
373 |
if (FLAG_IS_CMDLINE(NewRatio)) { |
7dc5c8f572b0
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changeset
|
374 |
if (FLAG_IS_CMDLINE(NewSize) || FLAG_IS_CMDLINE(MaxNewSize)) { |
7dc5c8f572b0
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changeset
|
375 |
warning("-XX:NewSize and -XX:MaxNewSize override -XX:NewRatio"); |
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changeset
|
376 |
} else { |
7dc5c8f572b0
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changeset
|
377 |
_sizer_kind = SizerNewRatio; |
7dc5c8f572b0
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diff
changeset
|
378 |
_adaptive_size = false; |
7dc5c8f572b0
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changeset
|
379 |
return; |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
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parents:
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diff
changeset
|
380 |
} |
10667 | 381 |
} |
5036
7b652cd72d65
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
5034
diff
changeset
|
382 |
|
21561
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
383 |
if (NewSize > MaxNewSize) { |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
384 |
if (FLAG_IS_CMDLINE(MaxNewSize)) { |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
385 |
warning("NewSize (" SIZE_FORMAT "k) is greater than the MaxNewSize (" SIZE_FORMAT "k). " |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
386 |
"A new max generation size of " SIZE_FORMAT "k will be used.", |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
387 |
NewSize/K, MaxNewSize/K, NewSize/K); |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
388 |
} |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
389 |
MaxNewSize = NewSize; |
20721
b134465e8682
8023643: G1 assert failed when NewSize was specified greater than MaxNewSize
jwilhelm
parents:
20398
diff
changeset
|
390 |
} |
b134465e8682
8023643: G1 assert failed when NewSize was specified greater than MaxNewSize
jwilhelm
parents:
20398
diff
changeset
|
391 |
|
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
392 |
if (FLAG_IS_CMDLINE(NewSize)) { |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
393 |
_min_desired_young_length = MAX2((uint) (NewSize / HeapRegion::GrainBytes), |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
394 |
1U); |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
395 |
if (FLAG_IS_CMDLINE(MaxNewSize)) { |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
396 |
_max_desired_young_length = |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
397 |
MAX2((uint) (MaxNewSize / HeapRegion::GrainBytes), |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
398 |
1U); |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
399 |
_sizer_kind = SizerMaxAndNewSize; |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
400 |
_adaptive_size = _min_desired_young_length == _max_desired_young_length; |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
401 |
} else { |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
402 |
_sizer_kind = SizerNewSizeOnly; |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
403 |
} |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
404 |
} else if (FLAG_IS_CMDLINE(MaxNewSize)) { |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
405 |
_max_desired_young_length = |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
406 |
MAX2((uint) (MaxNewSize / HeapRegion::GrainBytes), |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
407 |
1U); |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
408 |
_sizer_kind = SizerMaxNewSizeOnly; |
5036
7b652cd72d65
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
5034
diff
changeset
|
409 |
} |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
410 |
} |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
411 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
412 |
uint G1YoungGenSizer::calculate_default_min_length(uint new_number_of_heap_regions) { |
15089 | 413 |
uint default_value = (new_number_of_heap_regions * G1NewSizePercent) / 100; |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
414 |
return MAX2(1U, default_value); |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
415 |
} |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
416 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
417 |
uint G1YoungGenSizer::calculate_default_max_length(uint new_number_of_heap_regions) { |
15089 | 418 |
uint default_value = (new_number_of_heap_regions * G1MaxNewSizePercent) / 100; |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
419 |
return MAX2(1U, default_value); |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
420 |
} |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
421 |
|
21561
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
422 |
void G1YoungGenSizer::recalculate_min_max_young_length(uint number_of_heap_regions, uint* min_young_length, uint* max_young_length) { |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
423 |
assert(number_of_heap_regions > 0, "Heap must be initialized"); |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
424 |
|
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
425 |
switch (_sizer_kind) { |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
426 |
case SizerDefaults: |
21561
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
427 |
*min_young_length = calculate_default_min_length(number_of_heap_regions); |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
428 |
*max_young_length = calculate_default_max_length(number_of_heap_regions); |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
429 |
break; |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
430 |
case SizerNewSizeOnly: |
21561
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
431 |
*max_young_length = calculate_default_max_length(number_of_heap_regions); |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
432 |
*max_young_length = MAX2(*min_young_length, *max_young_length); |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
433 |
break; |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
434 |
case SizerMaxNewSizeOnly: |
21561
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
435 |
*min_young_length = calculate_default_min_length(number_of_heap_regions); |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
436 |
*min_young_length = MIN2(*min_young_length, *max_young_length); |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
437 |
break; |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
438 |
case SizerMaxAndNewSize: |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
439 |
// Do nothing. Values set on the command line, don't update them at runtime. |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
440 |
break; |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
441 |
case SizerNewRatio: |
21561
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
442 |
*min_young_length = number_of_heap_regions / (NewRatio + 1); |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
443 |
*max_young_length = *min_young_length; |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
444 |
break; |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
445 |
default: |
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
446 |
ShouldNotReachHere(); |
5036
7b652cd72d65
6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents:
5034
diff
changeset
|
447 |
} |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
448 |
|
21561
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
449 |
assert(*min_young_length <= *max_young_length, "Invalid min/max young gen size values"); |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
450 |
} |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
451 |
|
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
452 |
uint G1YoungGenSizer::max_young_length(uint number_of_heap_regions) { |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
453 |
// We need to pass the desired values because recalculation may not update these |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
454 |
// values in some cases. |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
455 |
uint temp = _min_desired_young_length; |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
456 |
uint result = _max_desired_young_length; |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
457 |
recalculate_min_max_young_length(number_of_heap_regions, &temp, &result); |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
458 |
return result; |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
459 |
} |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
460 |
|
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
461 |
void G1YoungGenSizer::heap_size_changed(uint new_number_of_heap_regions) { |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
462 |
recalculate_min_max_young_length(new_number_of_heap_regions, &_min_desired_young_length, |
c619b1cb4554
8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents:
21558
diff
changeset
|
463 |
&_max_desired_young_length); |
10529
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
464 |
} |
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
465 |
|
36102
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
466 |
void G1CollectorPolicy::post_heap_initialize() { |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
467 |
uintx max_regions = G1CollectedHeap::heap()->max_regions(); |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
468 |
size_t max_young_size = (size_t)_young_gen_sizer->max_young_length(max_regions) * HeapRegion::GrainBytes; |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
469 |
if (max_young_size != MaxNewSize) { |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
470 |
FLAG_SET_ERGO(size_t, MaxNewSize, max_young_size); |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
471 |
} |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
472 |
|
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
473 |
_ihop_control = create_ihop_control(); |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
474 |
} |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
475 |
|
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
476 |
void G1CollectorPolicy::initialize_flags() { |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
477 |
if (G1HeapRegionSize != HeapRegion::GrainBytes) { |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
478 |
FLAG_SET_ERGO(size_t, G1HeapRegionSize, HeapRegion::GrainBytes); |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
479 |
} |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
480 |
|
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
481 |
if (SurvivorRatio < 1) { |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
482 |
vm_exit_during_initialization("Invalid survivor ratio specified"); |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
483 |
} |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
484 |
CollectorPolicy::initialize_flags(); |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
485 |
_young_gen_sizer = new G1YoungGenSizer(); // Must be after call to initialize_flags |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
486 |
} |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
487 |
|
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
488 |
|
1374 | 489 |
void G1CollectorPolicy::init() { |
490 |
// Set aside an initial future to_space. |
|
491 |
_g1 = G1CollectedHeap::heap(); |
|
492 |
||
493 |
assert(Heap_lock->owned_by_self(), "Locking discipline."); |
|
494 |
||
2009 | 495 |
initialize_gc_policy_counters(); |
496 |
||
10529
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
497 |
if (adaptive_young_list_length()) { |
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
498 |
_young_list_fixed_length = 0; |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
499 |
} else { |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
500 |
_young_list_fixed_length = _young_gen_sizer->min_desired_young_length(); |
1374 | 501 |
} |
26157
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25727
diff
changeset
|
502 |
_free_regions_at_end_of_collection = _g1->num_free_regions(); |
33214
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
503 |
|
33591
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
504 |
update_young_list_max_and_target_length(); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
505 |
// We may immediately start allocating regions and placing them on the |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
506 |
// collection set list. Initialize the per-collection set info |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
507 |
start_incremental_cset_building(); |
1374 | 508 |
} |
509 |
||
33739 | 510 |
void G1CollectorPolicy::note_gc_start(uint num_active_workers) { |
511 |
phase_times()->note_gc_start(num_active_workers); |
|
512 |
} |
|
513 |
||
2009 | 514 |
// Create the jstat counters for the policy. |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
515 |
void G1CollectorPolicy::initialize_gc_policy_counters() { |
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
516 |
_gc_policy_counters = new GCPolicyCounters("GarbageFirst", 1, 3); |
2009 | 517 |
} |
518 |
||
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
519 |
bool G1CollectorPolicy::predict_will_fit(uint young_length, |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
520 |
double base_time_ms, |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
521 |
uint base_free_regions, |
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
522 |
double target_pause_time_ms) const { |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
523 |
if (young_length >= base_free_regions) { |
1374 | 524 |
// end condition 1: not enough space for the young regions |
525 |
return false; |
|
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
526 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
527 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
528 |
double accum_surv_rate = accum_yg_surv_rate_pred((int) young_length - 1); |
1374 | 529 |
size_t bytes_to_copy = |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
530 |
(size_t) (accum_surv_rate * (double) HeapRegion::GrainBytes); |
1374 | 531 |
double copy_time_ms = predict_object_copy_time_ms(bytes_to_copy); |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
532 |
double young_other_time_ms = predict_young_other_time_ms(young_length); |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
533 |
double pause_time_ms = base_time_ms + copy_time_ms + young_other_time_ms; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
534 |
if (pause_time_ms > target_pause_time_ms) { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
535 |
// end condition 2: prediction is over the target pause time |
1374 | 536 |
return false; |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
537 |
} |
1374 | 538 |
|
33214
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
539 |
size_t free_bytes = (base_free_regions - young_length) * HeapRegion::GrainBytes; |
34134
d4fd14f628fb
8138684: G1 decision about taking regions into the collection set is too aggressive
tschatzl
parents:
33811
diff
changeset
|
540 |
|
d4fd14f628fb
8138684: G1 decision about taking regions into the collection set is too aggressive
tschatzl
parents:
33811
diff
changeset
|
541 |
// When copying, we will likely need more bytes free than is live in the region. |
d4fd14f628fb
8138684: G1 decision about taking regions into the collection set is too aggressive
tschatzl
parents:
33811
diff
changeset
|
542 |
// Add some safety margin to factor in the confidence of our guess, and the |
d4fd14f628fb
8138684: G1 decision about taking regions into the collection set is too aggressive
tschatzl
parents:
33811
diff
changeset
|
543 |
// natural expected waste. |
d4fd14f628fb
8138684: G1 decision about taking regions into the collection set is too aggressive
tschatzl
parents:
33811
diff
changeset
|
544 |
// (100.0 / G1ConfidencePercent) is a scale factor that expresses the uncertainty |
d4fd14f628fb
8138684: G1 decision about taking regions into the collection set is too aggressive
tschatzl
parents:
33811
diff
changeset
|
545 |
// of the calculation: the lower the confidence, the more headroom. |
d4fd14f628fb
8138684: G1 decision about taking regions into the collection set is too aggressive
tschatzl
parents:
33811
diff
changeset
|
546 |
// (100 + TargetPLABWastePct) represents the increase in expected bytes during |
d4fd14f628fb
8138684: G1 decision about taking regions into the collection set is too aggressive
tschatzl
parents:
33811
diff
changeset
|
547 |
// copying due to anticipated waste in the PLABs. |
d4fd14f628fb
8138684: G1 decision about taking regions into the collection set is too aggressive
tschatzl
parents:
33811
diff
changeset
|
548 |
double safety_factor = (100.0 / G1ConfidencePercent) * (100 + TargetPLABWastePct) / 100.0; |
35196
c83940b346b2
8143215: gcc 4.1.2: fix three issues breaking the build.
goetz
parents:
35163
diff
changeset
|
549 |
size_t expected_bytes_to_copy = (size_t)(safety_factor * bytes_to_copy); |
34134
d4fd14f628fb
8138684: G1 decision about taking regions into the collection set is too aggressive
tschatzl
parents:
33811
diff
changeset
|
550 |
|
d4fd14f628fb
8138684: G1 decision about taking regions into the collection set is too aggressive
tschatzl
parents:
33811
diff
changeset
|
551 |
if (expected_bytes_to_copy > free_bytes) { |
d4fd14f628fb
8138684: G1 decision about taking regions into the collection set is too aggressive
tschatzl
parents:
33811
diff
changeset
|
552 |
// end condition 3: out-of-space |
1374 | 553 |
return false; |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
554 |
} |
1374 | 555 |
|
556 |
// success! |
|
557 |
return true; |
|
558 |
} |
|
559 |
||
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
560 |
void G1CollectorPolicy::record_new_heap_size(uint new_number_of_regions) { |
10529
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
561 |
// re-calculate the necessary reserve |
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
562 |
double reserve_regions_d = (double) new_number_of_regions * _reserve_factor; |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
563 |
// We use ceiling so that if reserve_regions_d is > 0.0 (but |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
564 |
// smaller than 1.0) we'll get 1. |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
565 |
_reserve_regions = (uint) ceil(reserve_regions_d); |
10529
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
566 |
|
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
567 |
_young_gen_sizer->heap_size_changed(new_number_of_regions); |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
568 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
569 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
570 |
uint G1CollectorPolicy::calculate_young_list_desired_min_length( |
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
571 |
uint base_min_length) const { |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
572 |
uint desired_min_length = 0; |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
573 |
if (adaptive_young_list_length()) { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
574 |
if (_alloc_rate_ms_seq->num() > 3) { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
575 |
double now_sec = os::elapsedTime(); |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
576 |
double when_ms = _mmu_tracker->when_max_gc_sec(now_sec) * 1000.0; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
577 |
double alloc_rate_ms = predict_alloc_rate_ms(); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
578 |
desired_min_length = (uint) ceil(alloc_rate_ms * when_ms); |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
579 |
} else { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
580 |
// otherwise we don't have enough info to make the prediction |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
581 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
582 |
} |
10529
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
583 |
desired_min_length += base_min_length; |
9d5bbffbb322
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
10528
diff
changeset
|
584 |
// make sure we don't go below any user-defined minimum bound |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
585 |
return MAX2(_young_gen_sizer->min_desired_young_length(), desired_min_length); |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
586 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
587 |
|
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
588 |
uint G1CollectorPolicy::calculate_young_list_desired_max_length() const { |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
589 |
// Here, we might want to also take into account any additional |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
590 |
// constraints (i.e., user-defined minimum bound). Currently, we |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
591 |
// effectively don't set this bound. |
11397
7dc5c8f572b0
7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents:
11396
diff
changeset
|
592 |
return _young_gen_sizer->max_desired_young_length(); |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
593 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
594 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
595 |
uint G1CollectorPolicy::update_young_list_max_and_target_length() { |
35196
c83940b346b2
8143215: gcc 4.1.2: fix three issues breaking the build.
goetz
parents:
35163
diff
changeset
|
596 |
return update_young_list_max_and_target_length(get_new_size_prediction(_rs_lengths_seq)); |
33591
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
597 |
} |
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
598 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
599 |
uint G1CollectorPolicy::update_young_list_max_and_target_length(size_t rs_lengths) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
600 |
uint unbounded_target_length = update_young_list_target_length(rs_lengths); |
33591
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
601 |
update_max_gc_locker_expansion(); |
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
602 |
return unbounded_target_length; |
33591
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
603 |
} |
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
604 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
605 |
uint G1CollectorPolicy::update_young_list_target_length(size_t rs_lengths) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
606 |
YoungTargetLengths young_lengths = young_list_target_lengths(rs_lengths); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
607 |
_young_list_target_length = young_lengths.first; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
608 |
return young_lengths.second; |
33591
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
609 |
} |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
610 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
611 |
G1CollectorPolicy::YoungTargetLengths G1CollectorPolicy::young_list_target_lengths(size_t rs_lengths) const { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
612 |
YoungTargetLengths result; |
33591
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
613 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
614 |
// Calculate the absolute and desired min bounds first. |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
615 |
|
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
616 |
// This is how many young regions we already have (currently: the survivors). |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
617 |
uint base_min_length = recorded_survivor_regions(); |
29465
7c6ad4acdb78
8031538: G1 eden usage is sometimes higher than target eden (printed Eden size)
sfriberg
parents:
28832
diff
changeset
|
618 |
uint desired_min_length = calculate_young_list_desired_min_length(base_min_length); |
7c6ad4acdb78
8031538: G1 eden usage is sometimes higher than target eden (printed Eden size)
sfriberg
parents:
28832
diff
changeset
|
619 |
// This is the absolute minimum young length. Ensure that we |
7c6ad4acdb78
8031538: G1 eden usage is sometimes higher than target eden (printed Eden size)
sfriberg
parents:
28832
diff
changeset
|
620 |
// will at least have one eden region available for allocation. |
7c6ad4acdb78
8031538: G1 eden usage is sometimes higher than target eden (printed Eden size)
sfriberg
parents:
28832
diff
changeset
|
621 |
uint absolute_min_length = base_min_length + MAX2(_g1->young_list()->eden_length(), (uint)1); |
7c6ad4acdb78
8031538: G1 eden usage is sometimes higher than target eden (printed Eden size)
sfriberg
parents:
28832
diff
changeset
|
622 |
// If we shrank the young list target it should not shrink below the current size. |
7c6ad4acdb78
8031538: G1 eden usage is sometimes higher than target eden (printed Eden size)
sfriberg
parents:
28832
diff
changeset
|
623 |
desired_min_length = MAX2(desired_min_length, absolute_min_length); |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
624 |
// Calculate the absolute and desired max bounds. |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
625 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
626 |
uint desired_max_length = calculate_young_list_desired_max_length(); |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
627 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
628 |
uint young_list_target_length = 0; |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
629 |
if (adaptive_young_list_length()) { |
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
630 |
if (collector_state()->gcs_are_young()) { |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
631 |
young_list_target_length = |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
632 |
calculate_young_list_target_length(rs_lengths, |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
633 |
base_min_length, |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
634 |
desired_min_length, |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
635 |
desired_max_length); |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
636 |
} else { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
637 |
// Don't calculate anything and let the code below bound it to |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
638 |
// the desired_min_length, i.e., do the next GC as soon as |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
639 |
// possible to maximize how many old regions we can add to it. |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
640 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
641 |
} else { |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
642 |
// The user asked for a fixed young gen so we'll fix the young gen |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
643 |
// whether the next GC is young or mixed. |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
644 |
young_list_target_length = _young_list_fixed_length; |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
645 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
646 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
647 |
result.second = young_list_target_length; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
648 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
649 |
// We will try our best not to "eat" into the reserve. |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
650 |
uint absolute_max_length = 0; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
651 |
if (_free_regions_at_end_of_collection > _reserve_regions) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
652 |
absolute_max_length = _free_regions_at_end_of_collection - _reserve_regions; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
653 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
654 |
if (desired_max_length > absolute_max_length) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
655 |
desired_max_length = absolute_max_length; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
656 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
657 |
|
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
658 |
// Make sure we don't go over the desired max length, nor under the |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
659 |
// desired min length. In case they clash, desired_min_length wins |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
660 |
// which is why that test is second. |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
661 |
if (young_list_target_length > desired_max_length) { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
662 |
young_list_target_length = desired_max_length; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
663 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
664 |
if (young_list_target_length < desired_min_length) { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
665 |
young_list_target_length = desired_min_length; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
666 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
667 |
|
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
668 |
assert(young_list_target_length > recorded_survivor_regions(), |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
669 |
"we should be able to allocate at least one eden region"); |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
670 |
assert(young_list_target_length >= absolute_min_length, "post-condition"); |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
671 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
672 |
result.first = young_list_target_length; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
673 |
return result; |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
674 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
675 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
676 |
uint |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
677 |
G1CollectorPolicy::calculate_young_list_target_length(size_t rs_lengths, |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
678 |
uint base_min_length, |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
679 |
uint desired_min_length, |
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
680 |
uint desired_max_length) const { |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
681 |
assert(adaptive_young_list_length(), "pre-condition"); |
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
682 |
assert(collector_state()->gcs_are_young(), "only call this for young GCs"); |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
683 |
|
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
684 |
// In case some edge-condition makes the desired max length too small... |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
685 |
if (desired_max_length <= desired_min_length) { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
686 |
return desired_min_length; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
687 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
688 |
|
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
689 |
// We'll adjust min_young_length and max_young_length not to include |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
690 |
// the already allocated young regions (i.e., so they reflect the |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
691 |
// min and max eden regions we'll allocate). The base_min_length |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
692 |
// will be reflected in the predictions by the |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
693 |
// survivor_regions_evac_time prediction. |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
694 |
assert(desired_min_length > base_min_length, "invariant"); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
695 |
uint min_young_length = desired_min_length - base_min_length; |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
696 |
assert(desired_max_length > base_min_length, "invariant"); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
697 |
uint max_young_length = desired_max_length - base_min_length; |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
698 |
|
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
699 |
double target_pause_time_ms = _mmu_tracker->max_gc_time() * 1000.0; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
700 |
double survivor_regions_evac_time = predict_survivor_regions_evac_time(); |
35196
c83940b346b2
8143215: gcc 4.1.2: fix three issues breaking the build.
goetz
parents:
35163
diff
changeset
|
701 |
size_t pending_cards = get_new_size_prediction(_pending_cards_seq); |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
702 |
size_t adj_rs_lengths = rs_lengths + predict_rs_length_diff(); |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
703 |
size_t scanned_cards = predict_young_card_num(adj_rs_lengths); |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
704 |
double base_time_ms = |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
705 |
predict_base_elapsed_time_ms(pending_cards, scanned_cards) + |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
706 |
survivor_regions_evac_time; |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
707 |
uint available_free_regions = _free_regions_at_end_of_collection; |
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
708 |
uint base_free_regions = 0; |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
709 |
if (available_free_regions > _reserve_regions) { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
710 |
base_free_regions = available_free_regions - _reserve_regions; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
711 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
712 |
|
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
713 |
// Here, we will make sure that the shortest young length that |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
714 |
// makes sense fits within the target pause time. |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
715 |
|
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
716 |
if (predict_will_fit(min_young_length, base_time_ms, |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
717 |
base_free_regions, target_pause_time_ms)) { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
718 |
// The shortest young length will fit into the target pause time; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
719 |
// we'll now check whether the absolute maximum number of young |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
720 |
// regions will fit in the target pause time. If not, we'll do |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
721 |
// a binary search between min_young_length and max_young_length. |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
722 |
if (predict_will_fit(max_young_length, base_time_ms, |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
723 |
base_free_regions, target_pause_time_ms)) { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
724 |
// The maximum young length will fit into the target pause time. |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
725 |
// We are done so set min young length to the maximum length (as |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
726 |
// the result is assumed to be returned in min_young_length). |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
727 |
min_young_length = max_young_length; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
728 |
} else { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
729 |
// The maximum possible number of young regions will not fit within |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
730 |
// the target pause time so we'll search for the optimal |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
731 |
// length. The loop invariants are: |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
732 |
// |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
733 |
// min_young_length < max_young_length |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
734 |
// min_young_length is known to fit into the target pause time |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
735 |
// max_young_length is known not to fit into the target pause time |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
736 |
// |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
737 |
// Going into the loop we know the above hold as we've just |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
738 |
// checked them. Every time around the loop we check whether |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
739 |
// the middle value between min_young_length and |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
740 |
// max_young_length fits into the target pause time. If it |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
741 |
// does, it becomes the new min. If it doesn't, it becomes |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
742 |
// the new max. This way we maintain the loop invariants. |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
743 |
|
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
744 |
assert(min_young_length < max_young_length, "invariant"); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
745 |
uint diff = (max_young_length - min_young_length) / 2; |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
746 |
while (diff > 0) { |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
747 |
uint young_length = min_young_length + diff; |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
748 |
if (predict_will_fit(young_length, base_time_ms, |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
749 |
base_free_regions, target_pause_time_ms)) { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
750 |
min_young_length = young_length; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
751 |
} else { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
752 |
max_young_length = young_length; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
753 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
754 |
assert(min_young_length < max_young_length, "invariant"); |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
755 |
diff = (max_young_length - min_young_length) / 2; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
756 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
757 |
// The results is min_young_length which, according to the |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
758 |
// loop invariants, should fit within the target pause time. |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
759 |
|
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
760 |
// These are the post-conditions of the binary search above: |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
761 |
assert(min_young_length < max_young_length, |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
762 |
"otherwise we should have discovered that max_young_length " |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
763 |
"fits into the pause target and not done the binary search"); |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
764 |
assert(predict_will_fit(min_young_length, base_time_ms, |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
765 |
base_free_regions, target_pause_time_ms), |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
766 |
"min_young_length, the result of the binary search, should " |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
767 |
"fit into the pause target"); |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
768 |
assert(!predict_will_fit(min_young_length + 1, base_time_ms, |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
769 |
base_free_regions, target_pause_time_ms), |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
770 |
"min_young_length, the result of the binary search, should be " |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
771 |
"optimal, so no larger length should fit into the pause target"); |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
772 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
773 |
} else { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
774 |
// Even the minimum length doesn't fit into the pause time |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
775 |
// target, return it as the result nevertheless. |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
776 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
777 |
return base_min_length + min_young_length; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
778 |
} |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
779 |
|
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
780 |
double G1CollectorPolicy::predict_survivor_regions_evac_time() const { |
2009 | 781 |
double survivor_regions_evac_time = 0.0; |
782 |
for (HeapRegion * r = _recorded_survivor_head; |
|
783 |
r != NULL && r != _recorded_survivor_tail->get_next_young_region(); |
|
784 |
r = r->get_next_young_region()) { |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
785 |
survivor_regions_evac_time += predict_region_elapsed_time_ms(r, collector_state()->gcs_are_young()); |
2009 | 786 |
} |
787 |
return survivor_regions_evac_time; |
|
788 |
} |
|
789 |
||
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
790 |
void G1CollectorPolicy::revise_young_list_target_length_if_necessary() { |
1374 | 791 |
guarantee( adaptive_young_list_length(), "should not call this otherwise" ); |
792 |
||
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
793 |
size_t rs_lengths = _g1->young_list()->sampled_rs_lengths(); |
1374 | 794 |
if (rs_lengths > _rs_lengths_prediction) { |
795 |
// add 10% to avoid having to recalculate often |
|
796 |
size_t rs_lengths_prediction = rs_lengths * 1100 / 1000; |
|
33591
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
797 |
update_rs_lengths_prediction(rs_lengths_prediction); |
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
798 |
|
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
799 |
update_young_list_max_and_target_length(rs_lengths_prediction); |
1374 | 800 |
} |
801 |
} |
|
802 |
||
33591
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
803 |
void G1CollectorPolicy::update_rs_lengths_prediction() { |
35196
c83940b346b2
8143215: gcc 4.1.2: fix three issues breaking the build.
goetz
parents:
35163
diff
changeset
|
804 |
update_rs_lengths_prediction(get_new_size_prediction(_rs_lengths_seq)); |
33591
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
805 |
} |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
806 |
|
33591
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
807 |
void G1CollectorPolicy::update_rs_lengths_prediction(size_t prediction) { |
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
808 |
if (collector_state()->gcs_are_young() && adaptive_young_list_length()) { |
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
809 |
_rs_lengths_prediction = prediction; |
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
810 |
} |
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
811 |
} |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
812 |
|
1374 | 813 |
#ifndef PRODUCT |
814 |
bool G1CollectorPolicy::verify_young_ages() { |
|
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
815 |
HeapRegion* head = _g1->young_list()->first_region(); |
1374 | 816 |
return |
817 |
verify_young_ages(head, _short_lived_surv_rate_group); |
|
818 |
// also call verify_young_ages on any additional surv rate groups |
|
819 |
} |
|
820 |
||
821 |
bool |
|
822 |
G1CollectorPolicy::verify_young_ages(HeapRegion* head, |
|
823 |
SurvRateGroup *surv_rate_group) { |
|
824 |
guarantee( surv_rate_group != NULL, "pre-condition" ); |
|
825 |
||
826 |
const char* name = surv_rate_group->name(); |
|
827 |
bool ret = true; |
|
828 |
int prev_age = -1; |
|
829 |
||
830 |
for (HeapRegion* curr = head; |
|
831 |
curr != NULL; |
|
832 |
curr = curr->get_next_young_region()) { |
|
833 |
SurvRateGroup* group = curr->surv_rate_group(); |
|
834 |
if (group == NULL && !curr->is_survivor()) { |
|
36090
cffc1dd98258
8149541: Use log_error() instead of log_info() when verification reports a problem
brutisso
parents:
35943
diff
changeset
|
835 |
log_error(gc, verify)("## %s: encountered NULL surv_rate_group", name); |
1374 | 836 |
ret = false; |
837 |
} |
|
838 |
||
839 |
if (surv_rate_group == group) { |
|
840 |
int age = curr->age_in_surv_rate_group(); |
|
841 |
||
842 |
if (age < 0) { |
|
36090
cffc1dd98258
8149541: Use log_error() instead of log_info() when verification reports a problem
brutisso
parents:
35943
diff
changeset
|
843 |
log_error(gc, verify)("## %s: encountered negative age", name); |
1374 | 844 |
ret = false; |
845 |
} |
|
846 |
||
847 |
if (age <= prev_age) { |
|
36090
cffc1dd98258
8149541: Use log_error() instead of log_info() when verification reports a problem
brutisso
parents:
35943
diff
changeset
|
848 |
log_error(gc, verify)("## %s: region ages are not strictly increasing (%d, %d)", name, age, prev_age); |
1374 | 849 |
ret = false; |
850 |
} |
|
851 |
prev_age = age; |
|
852 |
} |
|
853 |
} |
|
854 |
||
855 |
return ret; |
|
856 |
} |
|
857 |
#endif // PRODUCT |
|
858 |
||
859 |
void G1CollectorPolicy::record_full_collection_start() { |
|
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
12781
diff
changeset
|
860 |
_full_collection_start_sec = os::elapsedTime(); |
1374 | 861 |
// Release the future to-space so that it is available for compaction into. |
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
862 |
collector_state()->set_full_collection(true); |
1374 | 863 |
} |
864 |
||
865 |
void G1CollectorPolicy::record_full_collection_end() { |
|
866 |
// Consider this like a collection pause for the purposes of allocation |
|
867 |
// since last pause. |
|
868 |
double end_sec = os::elapsedTime(); |
|
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
12781
diff
changeset
|
869 |
double full_gc_time_sec = end_sec - _full_collection_start_sec; |
1374 | 870 |
double full_gc_time_ms = full_gc_time_sec * 1000.0; |
871 |
||
2121
0b899b36d991
6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents:
2011
diff
changeset
|
872 |
update_recent_gc_times(end_sec, full_gc_time_ms); |
1374 | 873 |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
874 |
collector_state()->set_full_collection(false); |
1374 | 875 |
|
11249 | 876 |
// "Nuke" the heuristics that control the young/mixed GC |
877 |
// transitions and make sure we start with young GCs after the Full GC. |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
878 |
collector_state()->set_gcs_are_young(true); |
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
879 |
collector_state()->set_last_young_gc(false); |
33809
62f8fb907ad5
8139874: After G1 Full GC, the next GC is always a young-only GC
tschatzl
parents:
33808
diff
changeset
|
880 |
collector_state()->set_initiate_conc_mark_if_possible(need_to_start_conc_mark("end of Full GC", 0)); |
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
881 |
collector_state()->set_during_initial_mark_pause(false); |
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
882 |
collector_state()->set_in_marking_window(false); |
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
883 |
collector_state()->set_in_marking_window_im(false); |
1374 | 884 |
|
885 |
_short_lived_surv_rate_group->start_adding_regions(); |
|
886 |
// also call this on any additional surv rate groups |
|
887 |
||
2009 | 888 |
record_survivor_regions(0, NULL, NULL); |
889 |
||
26157
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25727
diff
changeset
|
890 |
_free_regions_at_end_of_collection = _g1->num_free_regions(); |
2009 | 891 |
// Reset survivors SurvRateGroup. |
892 |
_survivor_surv_rate_group->reset(); |
|
33591
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
893 |
update_young_list_max_and_target_length(); |
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
894 |
update_rs_lengths_prediction(); |
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
895 |
cset_chooser()->clear(); |
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
896 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
897 |
_bytes_allocated_in_old_since_last_gc = 0; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
898 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
899 |
record_pause(FullGC, _full_collection_start_sec, end_sec); |
7398 | 900 |
} |
1374 | 901 |
|
16993
c9fd6b7ef40e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
15861
diff
changeset
|
902 |
void G1CollectorPolicy::record_collection_pause_start(double start_time_sec) { |
11584
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11581
diff
changeset
|
903 |
// We only need to do this here as the policy will only be applied |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11581
diff
changeset
|
904 |
// to the GC we're about to start. so, no point is calculating this |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11581
diff
changeset
|
905 |
// every time we calculate / recalculate the target young length. |
e1df4d08a1f4
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
11581
diff
changeset
|
906 |
update_survivors_policy(); |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
907 |
|
7398 | 908 |
assert(_g1->used() == _g1->recalculate_used(), |
33105
294e48b4f704
8080775: Better argument formatting for assert() and friends
david
parents:
32745
diff
changeset
|
909 |
"sanity, used: " SIZE_FORMAT " recalculate_used: " SIZE_FORMAT, |
294e48b4f704
8080775: Better argument formatting for assert() and friends
david
parents:
32745
diff
changeset
|
910 |
_g1->used(), _g1->recalculate_used()); |
1374 | 911 |
|
13516
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
912 |
phase_times()->record_cur_collection_start_sec(start_time_sec); |
1374 | 913 |
_pending_cards = _g1->pending_card_num(); |
914 |
||
13482 | 915 |
_collection_set_bytes_used_before = 0; |
10243
d00a21009f1f
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
10236
diff
changeset
|
916 |
_bytes_copied_during_gc = 0; |
1374 | 917 |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
918 |
collector_state()->set_last_gc_was_young(false); |
1374 | 919 |
|
920 |
// do that for any other surv rate groups |
|
921 |
_short_lived_surv_rate_group->stop_adding_regions(); |
|
5033 | 922 |
_survivors_age_table.clear(); |
2009 | 923 |
|
1374 | 924 |
assert( verify_young_ages(), "region age verification" ); |
925 |
} |
|
926 |
||
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
927 |
void G1CollectorPolicy::record_concurrent_mark_init_end(double |
1374 | 928 |
mark_init_elapsed_time_ms) { |
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
929 |
collector_state()->set_during_marking(true); |
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
930 |
assert(!collector_state()->initiate_conc_mark_if_possible(), "we should have cleared it by now"); |
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
931 |
collector_state()->set_during_initial_mark_pause(false); |
1374 | 932 |
} |
933 |
||
934 |
void G1CollectorPolicy::record_concurrent_mark_remark_start() { |
|
935 |
_mark_remark_start_sec = os::elapsedTime(); |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
936 |
collector_state()->set_during_marking(false); |
1374 | 937 |
} |
938 |
||
939 |
void G1CollectorPolicy::record_concurrent_mark_remark_end() { |
|
940 |
double end_time_sec = os::elapsedTime(); |
|
941 |
double elapsed_time_ms = (end_time_sec - _mark_remark_start_sec)*1000.0; |
|
942 |
_concurrent_mark_remark_times_ms->add(elapsed_time_ms); |
|
943 |
_prev_collection_pause_end_ms += elapsed_time_ms; |
|
944 |
||
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
945 |
record_pause(Remark, _mark_remark_start_sec, end_time_sec); |
1374 | 946 |
} |
947 |
||
948 |
void G1CollectorPolicy::record_concurrent_mark_cleanup_start() { |
|
949 |
_mark_cleanup_start_sec = os::elapsedTime(); |
|
950 |
} |
|
951 |
||
10746
96f50959f650
7088680: G1: Cleanup in the G1CollectorPolicy class
tonyp
parents:
10677
diff
changeset
|
952 |
void G1CollectorPolicy::record_concurrent_mark_cleanup_completed() { |
33811
b7cea7584267
8140689: Skip last young-only gc if nothing to do in the mixed gc phase
tschatzl
parents:
33810
diff
changeset
|
953 |
bool should_continue_with_reclaim = next_gc_should_be_mixed("request last young-only gc", |
b7cea7584267
8140689: Skip last young-only gc if nothing to do in the mixed gc phase
tschatzl
parents:
33810
diff
changeset
|
954 |
"skip last young-only gc"); |
b7cea7584267
8140689: Skip last young-only gc if nothing to do in the mixed gc phase
tschatzl
parents:
33810
diff
changeset
|
955 |
collector_state()->set_last_young_gc(should_continue_with_reclaim); |
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
956 |
// We skip the marking phase. |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
957 |
if (!should_continue_with_reclaim) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
958 |
abort_time_to_mixed_tracking(); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
959 |
} |
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
960 |
collector_state()->set_in_marking_window(false); |
1374 | 961 |
} |
962 |
||
33624
509a72e7127b
8140489: Introduce shorthand for average_time_ms in G1CollectorPolicy
ehelin
parents:
33591
diff
changeset
|
963 |
double G1CollectorPolicy::average_time_ms(G1GCPhaseTimes::GCParPhases phase) const { |
509a72e7127b
8140489: Introduce shorthand for average_time_ms in G1CollectorPolicy
ehelin
parents:
33591
diff
changeset
|
964 |
return phase_times()->average_time_ms(phase); |
509a72e7127b
8140489: Introduce shorthand for average_time_ms in G1CollectorPolicy
ehelin
parents:
33591
diff
changeset
|
965 |
} |
509a72e7127b
8140489: Introduce shorthand for average_time_ms in G1CollectorPolicy
ehelin
parents:
33591
diff
changeset
|
966 |
|
33747
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
967 |
double G1CollectorPolicy::young_other_time_ms() const { |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
968 |
return phase_times()->young_cset_choice_time_ms() + |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
969 |
phase_times()->young_free_cset_time_ms(); |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
970 |
} |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
971 |
|
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
972 |
double G1CollectorPolicy::non_young_other_time_ms() const { |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
973 |
return phase_times()->non_young_cset_choice_time_ms() + |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
974 |
phase_times()->non_young_free_cset_time_ms(); |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
975 |
|
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
976 |
} |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
977 |
|
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
978 |
double G1CollectorPolicy::other_time_ms(double pause_time_ms) const { |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
979 |
return pause_time_ms - |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
980 |
average_time_ms(G1GCPhaseTimes::UpdateRS) - |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
981 |
average_time_ms(G1GCPhaseTimes::ScanRS) - |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
982 |
average_time_ms(G1GCPhaseTimes::ObjCopy) - |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
983 |
average_time_ms(G1GCPhaseTimes::Termination); |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
984 |
} |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
985 |
|
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
986 |
double G1CollectorPolicy::constant_other_time_ms(double pause_time_ms) const { |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
987 |
return other_time_ms(pause_time_ms) - young_other_time_ms() - non_young_other_time_ms(); |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
988 |
} |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
989 |
|
33808
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
990 |
bool G1CollectorPolicy::about_to_start_mixed_phase() const { |
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
991 |
return _g1->concurrent_mark()->cmThread()->during_cycle() || collector_state()->last_young_gc(); |
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
992 |
} |
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
993 |
|
11581
b1afc51ad34e
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
11576
diff
changeset
|
994 |
bool G1CollectorPolicy::need_to_start_conc_mark(const char* source, size_t alloc_word_size) { |
33808
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
995 |
if (about_to_start_mixed_phase()) { |
11576
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
996 |
return false; |
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
997 |
} |
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
998 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
999 |
size_t marking_initiating_used_threshold = _ihop_control->get_conc_mark_start_threshold(); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1000 |
|
11576
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
1001 |
size_t cur_used_bytes = _g1->non_young_capacity_bytes(); |
11581
b1afc51ad34e
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
11576
diff
changeset
|
1002 |
size_t alloc_byte_size = alloc_word_size * HeapWordSize; |
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1003 |
size_t marking_request_bytes = cur_used_bytes + alloc_byte_size; |
11581
b1afc51ad34e
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
parents:
11576
diff
changeset
|
1004 |
|
35061 | 1005 |
bool result = false; |
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1006 |
if (marking_request_bytes > marking_initiating_used_threshold) { |
35061 | 1007 |
result = collector_state()->gcs_are_young() && !collector_state()->last_young_gc(); |
1008 |
log_debug(gc, ergo, ihop)("%s occupancy: " SIZE_FORMAT "B allocation request: " SIZE_FORMAT "B threshold: " SIZE_FORMAT "B (%1.2f) source: %s", |
|
1009 |
result ? "Request concurrent cycle initiation (occupancy higher than threshold)" : "Do not request concurrent cycle initiation (still doing mixed collections)", |
|
1010 |
cur_used_bytes, alloc_byte_size, marking_initiating_used_threshold, (double) marking_initiating_used_threshold / _g1->capacity() * 100, source); |
|
11576
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
1011 |
} |
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
1012 |
|
35061 | 1013 |
return result; |
11576
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
1014 |
} |
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
1015 |
|
1374 | 1016 |
// Anything below that is considered to be zero |
1017 |
#define MIN_TIMER_GRANULARITY 0.0000001 |
|
1018 |
||
35909
cf5f3c85e179
8148736: Let the G1 heap transition log regions instead of bytes
brutisso
parents:
35907
diff
changeset
|
1019 |
void G1CollectorPolicy::record_collection_pause_end(double pause_time_ms, size_t cards_scanned, size_t heap_used_bytes_before_gc) { |
1374 | 1020 |
double end_time_sec = os::elapsedTime(); |
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1021 |
|
1374 | 1022 |
size_t cur_used_bytes = _g1->used(); |
1023 |
assert(cur_used_bytes == _g1->recalculate_used(), "It should!"); |
|
1024 |
bool last_pause_included_initial_mark = false; |
|
6249 | 1025 |
bool update_stats = !_g1->evacuation_failed(); |
1374 | 1026 |
|
35061 | 1027 |
NOT_PRODUCT(_short_lived_surv_rate_group->print()); |
1374 | 1028 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1029 |
record_pause(young_gc_pause_kind(), end_time_sec - pause_time_ms / 1000.0, end_time_sec); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1030 |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1031 |
last_pause_included_initial_mark = collector_state()->during_initial_mark_pause(); |
11576
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
1032 |
if (last_pause_included_initial_mark) { |
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
1033 |
record_concurrent_mark_init_end(0.0); |
33810
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
1034 |
} else { |
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
1035 |
maybe_start_marking(); |
11576
e0bef5ca4602
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
11455
diff
changeset
|
1036 |
} |
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
1037 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1038 |
double app_time_ms = (phase_times()->cur_collection_start_sec() * 1000.0 - _prev_collection_pause_end_ms); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1039 |
if (app_time_ms < MIN_TIMER_GRANULARITY) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1040 |
// This usually happens due to the timer not having the required |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1041 |
// granularity. Some Linuxes are the usual culprits. |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1042 |
// We'll just set it to something (arbitrarily) small. |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1043 |
app_time_ms = 1.0; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1044 |
} |
1374 | 1045 |
|
2121
0b899b36d991
6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents:
2011
diff
changeset
|
1046 |
if (update_stats) { |
11169
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1047 |
// We maintain the invariant that all objects allocated by mutator |
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1048 |
// threads will be allocated out of eden regions. So, we can use |
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1049 |
// the eden region number allocated since the previous GC to |
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1050 |
// calculate the application's allocate rate. The only exception |
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1051 |
// to that is humongous objects that are allocated separately. But |
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1052 |
// given that humongous object allocations do not really affect |
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1053 |
// either the pause's duration nor when the next pause will take |
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1054 |
// place we can safely ignore them here. |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
1055 |
uint regions_allocated = eden_cset_region_length(); |
1374 | 1056 |
double alloc_rate_ms = (double) regions_allocated / app_time_ms; |
1057 |
_alloc_rate_ms_seq->add(alloc_rate_ms); |
|
1058 |
||
1059 |
double interval_ms = |
|
1060 |
(end_time_sec - _recent_prev_end_times_for_all_gcs_sec->oldest()) * 1000.0; |
|
13288
331d5b6725f3
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
12781
diff
changeset
|
1061 |
update_recent_gc_times(end_time_sec, pause_time_ms); |
1374 | 1062 |
_recent_avg_pause_time_ratio = _recent_gc_times_ms->sum()/interval_ms; |
4456
fa02c2ef7a70
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
4098
diff
changeset
|
1063 |
if (recent_avg_pause_time_ratio() < 0.0 || |
fa02c2ef7a70
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
4098
diff
changeset
|
1064 |
(recent_avg_pause_time_ratio() - 1.0 > 0.0)) { |
4457
f05d2dc1c332
6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents:
4456
diff
changeset
|
1065 |
// Clip ratio between 0.0 and 1.0, and continue. This will be fixed in |
f05d2dc1c332
6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents:
4456
diff
changeset
|
1066 |
// CR 6902692 by redoing the manner in which the ratio is incrementally computed. |
4456
fa02c2ef7a70
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
4098
diff
changeset
|
1067 |
if (_recent_avg_pause_time_ratio < 0.0) { |
fa02c2ef7a70
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
4098
diff
changeset
|
1068 |
_recent_avg_pause_time_ratio = 0.0; |
fa02c2ef7a70
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
4098
diff
changeset
|
1069 |
} else { |
fa02c2ef7a70
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
4098
diff
changeset
|
1070 |
assert(_recent_avg_pause_time_ratio - 1.0 > 0.0, "Ctl-point invariant"); |
fa02c2ef7a70
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
4098
diff
changeset
|
1071 |
_recent_avg_pause_time_ratio = 1.0; |
fa02c2ef7a70
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
4098
diff
changeset
|
1072 |
} |
fa02c2ef7a70
6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents:
4098
diff
changeset
|
1073 |
} |
34673 | 1074 |
|
1075 |
// Compute the ratio of just this last pause time to the entire time range stored |
|
1076 |
// in the vectors. Comparing this pause to the entire range, rather than only the |
|
1077 |
// most recent interval, has the effect of smoothing over a possible transient 'burst' |
|
1078 |
// of more frequent pauses that don't really reflect a change in heap occupancy. |
|
1079 |
// This reduces the likelihood of a needless heap expansion being triggered. |
|
1080 |
_last_pause_time_ratio = |
|
1081 |
(pause_time_ms * _recent_prev_end_times_for_all_gcs_sec->num()) / interval_ms; |
|
1374 | 1082 |
} |
17396
4d281f3a57bf
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
17320
diff
changeset
|
1083 |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1084 |
bool new_in_marking_window = collector_state()->in_marking_window(); |
1374 | 1085 |
bool new_in_marking_window_im = false; |
25727
7afb6523f5ab
8049051: Use of during_initial_mark_pause() in G1CollectorPolicy::record_collection_pause_end() prevents use of seperate object copy time prediction during marking
tschatzl
parents:
24941
diff
changeset
|
1086 |
if (last_pause_included_initial_mark) { |
1374 | 1087 |
new_in_marking_window = true; |
1088 |
new_in_marking_window_im = true; |
|
1089 |
} |
|
1090 |
||
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1091 |
if (collector_state()->last_young_gc()) { |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
1092 |
// This is supposed to to be the "last young GC" before we start |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
1093 |
// doing mixed GCs. Here we decide whether to start mixed GCs or not. |
33808
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
1094 |
assert(!last_pause_included_initial_mark, "The last young GC is not allowed to be an initial mark GC"); |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
1095 |
|
33808
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
1096 |
if (next_gc_should_be_mixed("start mixed GCs", |
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
1097 |
"do not start mixed GCs")) { |
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
1098 |
collector_state()->set_gcs_are_young(false); |
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1099 |
} else { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1100 |
// We aborted the mixed GC phase early. |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1101 |
abort_time_to_mixed_tracking(); |
10673
8235e1a1b41b
7086533: G1: assert(!_g1->is_obj_dead(obj)): We should not be preserving dead objs: g1CollectedHeap.cpp:3835
johnc
parents:
10670
diff
changeset
|
1102 |
} |
33808
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
1103 |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1104 |
collector_state()->set_last_young_gc(false); |
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
1105 |
} |
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
1106 |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1107 |
if (!collector_state()->last_gc_was_young()) { |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
1108 |
// This is a mixed GC. Here we decide whether to continue doing |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
1109 |
// mixed GCs or not. |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
1110 |
if (!next_gc_should_be_mixed("continue mixed GCs", |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
1111 |
"do not continue mixed GCs")) { |
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1112 |
collector_state()->set_gcs_are_young(true); |
33810
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
1113 |
|
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
1114 |
maybe_start_marking(); |
1374 | 1115 |
} |
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
1116 |
} |
11249 | 1117 |
|
1374 | 1118 |
_short_lived_surv_rate_group->start_adding_regions(); |
22551 | 1119 |
// Do that for any other surv rate groups |
1374 | 1120 |
|
2344 | 1121 |
if (update_stats) { |
1374 | 1122 |
double cost_per_card_ms = 0.0; |
33624
509a72e7127b
8140489: Introduce shorthand for average_time_ms in G1CollectorPolicy
ehelin
parents:
33591
diff
changeset
|
1123 |
double cost_scan_hcc = average_time_ms(G1GCPhaseTimes::ScanHCC); |
1374 | 1124 |
if (_pending_cards > 0) { |
33624
509a72e7127b
8140489: Introduce shorthand for average_time_ms in G1CollectorPolicy
ehelin
parents:
33591
diff
changeset
|
1125 |
cost_per_card_ms = (average_time_ms(G1GCPhaseTimes::UpdateRS) - cost_scan_hcc) / (double) _pending_cards; |
1374 | 1126 |
_cost_per_card_ms_seq->add(cost_per_card_ms); |
1127 |
} |
|
33204
b8a3901ac5b3
8069330: Adjustment of concurrent refinement thresholds does not take hot card cache into account
tschatzl
parents:
33150
diff
changeset
|
1128 |
_cost_scan_hcc_seq->add(cost_scan_hcc); |
1374 | 1129 |
|
1130 |
double cost_per_entry_ms = 0.0; |
|
1131 |
if (cards_scanned > 10) { |
|
33624
509a72e7127b
8140489: Introduce shorthand for average_time_ms in G1CollectorPolicy
ehelin
parents:
33591
diff
changeset
|
1132 |
cost_per_entry_ms = average_time_ms(G1GCPhaseTimes::ScanRS) / (double) cards_scanned; |
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1133 |
if (collector_state()->last_gc_was_young()) { |
1374 | 1134 |
_cost_per_entry_ms_seq->add(cost_per_entry_ms); |
11249 | 1135 |
} else { |
1136 |
_mixed_cost_per_entry_ms_seq->add(cost_per_entry_ms); |
|
1137 |
} |
|
1374 | 1138 |
} |
1139 |
||
1140 |
if (_max_rs_lengths > 0) { |
|
1141 |
double cards_per_entry_ratio = |
|
1142 |
(double) cards_scanned / (double) _max_rs_lengths; |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1143 |
if (collector_state()->last_gc_was_young()) { |
11249 | 1144 |
_young_cards_per_entry_ratio_seq->add(cards_per_entry_ratio); |
1145 |
} else { |
|
1146 |
_mixed_cards_per_entry_ratio_seq->add(cards_per_entry_ratio); |
|
1147 |
} |
|
1374 | 1148 |
} |
1149 |
||
11395
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1150 |
// This is defensive. For a while _max_rs_lengths could get |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1151 |
// smaller than _recorded_rs_lengths which was causing |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1152 |
// rs_length_diff to get very large and mess up the RSet length |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1153 |
// predictions. The reason was unsafe concurrent updates to the |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1154 |
// _inc_cset_recorded_rs_lengths field which the code below guards |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1155 |
// against (see CR 7118202). This bug has now been fixed (see CR |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1156 |
// 7119027). However, I'm still worried that |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1157 |
// _inc_cset_recorded_rs_lengths might still end up somewhat |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1158 |
// inaccurate. The concurrent refinement thread calculates an |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1159 |
// RSet's length concurrently with other CR threads updating it |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1160 |
// which might cause it to calculate the length incorrectly (if, |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1161 |
// say, it's in mid-coarsening). So I'll leave in the defensive |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1162 |
// conditional below just in case. |
11206
040c80ccd07f
7118202: G1: eden size unnecessarily drops to a minimum
tonyp
parents:
11176
diff
changeset
|
1163 |
size_t rs_length_diff = 0; |
040c80ccd07f
7118202: G1: eden size unnecessarily drops to a minimum
tonyp
parents:
11176
diff
changeset
|
1164 |
if (_max_rs_lengths > _recorded_rs_lengths) { |
040c80ccd07f
7118202: G1: eden size unnecessarily drops to a minimum
tonyp
parents:
11176
diff
changeset
|
1165 |
rs_length_diff = _max_rs_lengths - _recorded_rs_lengths; |
040c80ccd07f
7118202: G1: eden size unnecessarily drops to a minimum
tonyp
parents:
11176
diff
changeset
|
1166 |
} |
040c80ccd07f
7118202: G1: eden size unnecessarily drops to a minimum
tonyp
parents:
11176
diff
changeset
|
1167 |
_rs_length_diff_seq->add((double) rs_length_diff); |
1374 | 1168 |
|
35909
cf5f3c85e179
8148736: Let the G1 heap transition log regions instead of bytes
brutisso
parents:
35907
diff
changeset
|
1169 |
size_t freed_bytes = heap_used_bytes_before_gc - cur_used_bytes; |
17396
4d281f3a57bf
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
17320
diff
changeset
|
1170 |
size_t copied_bytes = _collection_set_bytes_used_before - freed_bytes; |
1374 | 1171 |
double cost_per_byte_ms = 0.0; |
17396
4d281f3a57bf
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
johnc
parents:
17320
diff
changeset
|
1172 |
|
1374 | 1173 |
if (copied_bytes > 0) { |
33624
509a72e7127b
8140489: Introduce shorthand for average_time_ms in G1CollectorPolicy
ehelin
parents:
33591
diff
changeset
|
1174 |
cost_per_byte_ms = average_time_ms(G1GCPhaseTimes::ObjCopy) / (double) copied_bytes; |
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1175 |
if (collector_state()->in_marking_window()) { |
1374 | 1176 |
_cost_per_byte_ms_during_cm_seq->add(cost_per_byte_ms); |
11249 | 1177 |
} else { |
1374 | 1178 |
_cost_per_byte_ms_seq->add(cost_per_byte_ms); |
11249 | 1179 |
} |
1374 | 1180 |
} |
1181 |
||
11169
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1182 |
if (young_cset_region_length() > 0) { |
33747
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
1183 |
_young_other_cost_per_region_ms_seq->add(young_other_time_ms() / |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
1184 |
young_cset_region_length()); |
1374 | 1185 |
} |
1186 |
||
33747
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
1187 |
if (old_cset_region_length() > 0) { |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
1188 |
_non_young_other_cost_per_region_ms_seq->add(non_young_other_time_ms() / |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
1189 |
old_cset_region_length()); |
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
1190 |
} |
1374 | 1191 |
|
33747
2dfa9256eb77
8140602: Split other time calculation into methods in G1CollectorPolicy
ehelin
parents:
33739
diff
changeset
|
1192 |
_constant_other_time_ms_seq->add(constant_other_time_ms(pause_time_ms)); |
1374 | 1193 |
|
1194 |
_pending_cards_seq->add((double) _pending_cards); |
|
1195 |
_rs_lengths_seq->add((double) _max_rs_lengths); |
|
1196 |
} |
|
1197 |
||
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1198 |
collector_state()->set_in_marking_window(new_in_marking_window); |
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1199 |
collector_state()->set_in_marking_window_im(new_in_marking_window_im); |
26157
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25727
diff
changeset
|
1200 |
_free_regions_at_end_of_collection = _g1->num_free_regions(); |
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1201 |
// IHOP control wants to know the expected young gen length if it were not |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1202 |
// restrained by the heap reserve. Using the actual length would make the |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1203 |
// prediction too small and the limit the young gen every time we get to the |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1204 |
// predicted target occupancy. |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1205 |
size_t last_unrestrained_young_length = update_young_list_max_and_target_length(); |
33591
4a2823c696ce
8138975: G1CollectorPolicy::calculate_young_list_target_length should be const
ehelin
parents:
33218
diff
changeset
|
1206 |
update_rs_lengths_prediction(); |
1374 | 1207 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1208 |
update_ihop_prediction(app_time_ms / 1000.0, |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1209 |
_bytes_allocated_in_old_since_last_gc, |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1210 |
last_unrestrained_young_length * HeapRegion::GrainBytes); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1211 |
_bytes_allocated_in_old_since_last_gc = 0; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1212 |
|
34300 | 1213 |
_ihop_control->send_trace_event(_g1->gc_tracer_stw()); |
1214 |
||
4481 | 1215 |
// Note that _mmu_tracker->max_gc_time() returns the time in seconds. |
5033 | 1216 |
double update_rs_time_goal_ms = _mmu_tracker->max_gc_time() * MILLIUNITS * G1RSetUpdatingPauseTimePercent / 100.0; |
33204
b8a3901ac5b3
8069330: Adjustment of concurrent refinement thresholds does not take hot card cache into account
tschatzl
parents:
33150
diff
changeset
|
1217 |
|
33624
509a72e7127b
8140489: Introduce shorthand for average_time_ms in G1CollectorPolicy
ehelin
parents:
33591
diff
changeset
|
1218 |
double scan_hcc_time_ms = average_time_ms(G1GCPhaseTimes::ScanHCC); |
33204
b8a3901ac5b3
8069330: Adjustment of concurrent refinement thresholds does not take hot card cache into account
tschatzl
parents:
33150
diff
changeset
|
1219 |
|
b8a3901ac5b3
8069330: Adjustment of concurrent refinement thresholds does not take hot card cache into account
tschatzl
parents:
33150
diff
changeset
|
1220 |
if (update_rs_time_goal_ms < scan_hcc_time_ms) { |
35061 | 1221 |
log_debug(gc, ergo, refine)("Adjust concurrent refinement thresholds (scanning the HCC expected to take longer than Update RS time goal)." |
1222 |
"Update RS time goal: %1.2fms Scan HCC time: %1.2fms", |
|
1223 |
update_rs_time_goal_ms, scan_hcc_time_ms); |
|
33204
b8a3901ac5b3
8069330: Adjustment of concurrent refinement thresholds does not take hot card cache into account
tschatzl
parents:
33150
diff
changeset
|
1224 |
|
b8a3901ac5b3
8069330: Adjustment of concurrent refinement thresholds does not take hot card cache into account
tschatzl
parents:
33150
diff
changeset
|
1225 |
update_rs_time_goal_ms = 0; |
b8a3901ac5b3
8069330: Adjustment of concurrent refinement thresholds does not take hot card cache into account
tschatzl
parents:
33150
diff
changeset
|
1226 |
} else { |
b8a3901ac5b3
8069330: Adjustment of concurrent refinement thresholds does not take hot card cache into account
tschatzl
parents:
33150
diff
changeset
|
1227 |
update_rs_time_goal_ms -= scan_hcc_time_ms; |
b8a3901ac5b3
8069330: Adjustment of concurrent refinement thresholds does not take hot card cache into account
tschatzl
parents:
33150
diff
changeset
|
1228 |
} |
33624
509a72e7127b
8140489: Introduce shorthand for average_time_ms in G1CollectorPolicy
ehelin
parents:
33591
diff
changeset
|
1229 |
adjust_concurrent_refinement(average_time_ms(G1GCPhaseTimes::UpdateRS) - scan_hcc_time_ms, |
33204
b8a3901ac5b3
8069330: Adjustment of concurrent refinement thresholds does not take hot card cache into account
tschatzl
parents:
33150
diff
changeset
|
1230 |
phase_times()->sum_thread_work_items(G1GCPhaseTimes::UpdateRS), |
b8a3901ac5b3
8069330: Adjustment of concurrent refinement thresholds does not take hot card cache into account
tschatzl
parents:
33150
diff
changeset
|
1231 |
update_rs_time_goal_ms); |
10746
96f50959f650
7088680: G1: Cleanup in the G1CollectorPolicy class
tonyp
parents:
10677
diff
changeset
|
1232 |
|
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
1233 |
cset_chooser()->verify(); |
1374 | 1234 |
} |
1235 |
||
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1236 |
G1IHOPControl* G1CollectorPolicy::create_ihop_control() const { |
34299
3fdfdda0ac1f
8136678: Implement adaptive sizing algorithm for IHOP
tschatzl
parents:
34298
diff
changeset
|
1237 |
if (G1UseAdaptiveIHOP) { |
3fdfdda0ac1f
8136678: Implement adaptive sizing algorithm for IHOP
tschatzl
parents:
34298
diff
changeset
|
1238 |
return new G1AdaptiveIHOPControl(InitiatingHeapOccupancyPercent, |
3fdfdda0ac1f
8136678: Implement adaptive sizing algorithm for IHOP
tschatzl
parents:
34298
diff
changeset
|
1239 |
G1CollectedHeap::heap()->max_capacity(), |
3fdfdda0ac1f
8136678: Implement adaptive sizing algorithm for IHOP
tschatzl
parents:
34298
diff
changeset
|
1240 |
&_predictor, |
3fdfdda0ac1f
8136678: Implement adaptive sizing algorithm for IHOP
tschatzl
parents:
34298
diff
changeset
|
1241 |
G1ReservePercent, |
3fdfdda0ac1f
8136678: Implement adaptive sizing algorithm for IHOP
tschatzl
parents:
34298
diff
changeset
|
1242 |
G1HeapWastePercent); |
3fdfdda0ac1f
8136678: Implement adaptive sizing algorithm for IHOP
tschatzl
parents:
34298
diff
changeset
|
1243 |
} else { |
3fdfdda0ac1f
8136678: Implement adaptive sizing algorithm for IHOP
tschatzl
parents:
34298
diff
changeset
|
1244 |
return new G1StaticIHOPControl(InitiatingHeapOccupancyPercent, |
3fdfdda0ac1f
8136678: Implement adaptive sizing algorithm for IHOP
tschatzl
parents:
34298
diff
changeset
|
1245 |
G1CollectedHeap::heap()->max_capacity()); |
3fdfdda0ac1f
8136678: Implement adaptive sizing algorithm for IHOP
tschatzl
parents:
34298
diff
changeset
|
1246 |
} |
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1247 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1248 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1249 |
void G1CollectorPolicy::update_ihop_prediction(double mutator_time_s, |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1250 |
size_t mutator_alloc_bytes, |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1251 |
size_t young_gen_size) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1252 |
// Always try to update IHOP prediction. Even evacuation failures give information |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1253 |
// about e.g. whether to start IHOP earlier next time. |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1254 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1255 |
// Avoid using really small application times that might create samples with |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1256 |
// very high or very low values. They may be caused by e.g. back-to-back gcs. |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1257 |
double const min_valid_time = 1e-6; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1258 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1259 |
bool report = false; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1260 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1261 |
double marking_to_mixed_time = -1.0; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1262 |
if (!collector_state()->last_gc_was_young() && _initial_mark_to_mixed.has_result()) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1263 |
marking_to_mixed_time = _initial_mark_to_mixed.last_marking_time(); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1264 |
assert(marking_to_mixed_time > 0.0, |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1265 |
"Initial mark to mixed time must be larger than zero but is %.3f", |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1266 |
marking_to_mixed_time); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1267 |
if (marking_to_mixed_time > min_valid_time) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1268 |
_ihop_control->update_marking_length(marking_to_mixed_time); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1269 |
report = true; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1270 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1271 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1272 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1273 |
// As an approximation for the young gc promotion rates during marking we use |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1274 |
// all of them. In many applications there are only a few if any young gcs during |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1275 |
// marking, which makes any prediction useless. This increases the accuracy of the |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1276 |
// prediction. |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1277 |
if (collector_state()->last_gc_was_young() && mutator_time_s > min_valid_time) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1278 |
_ihop_control->update_allocation_info(mutator_time_s, mutator_alloc_bytes, young_gen_size); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1279 |
report = true; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1280 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1281 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1282 |
if (report) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1283 |
report_ihop_statistics(); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1284 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1285 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1286 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1287 |
void G1CollectorPolicy::report_ihop_statistics() { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1288 |
_ihop_control->print(); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1289 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1290 |
|
35907
57bdb6243428
8148734: G1: Make G1GCPhaseTimes keep track of the start GC time
brutisso
parents:
35887
diff
changeset
|
1291 |
void G1CollectorPolicy::print_phases() { |
57bdb6243428
8148734: G1: Make G1GCPhaseTimes keep track of the start GC time
brutisso
parents:
35887
diff
changeset
|
1292 |
phase_times()->print(); |
33738
1708291bd3d7
8140508: Add utility method for logging phases to G1CollectorPolicy
ehelin
parents:
33624
diff
changeset
|
1293 |
} |
1708291bd3d7
8140508: Add utility method for logging phases to G1CollectorPolicy
ehelin
parents:
33624
diff
changeset
|
1294 |
|
4481 | 1295 |
void G1CollectorPolicy::adjust_concurrent_refinement(double update_rs_time, |
1296 |
double update_rs_processed_buffers, |
|
1297 |
double goal_ms) { |
|
1298 |
DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
|
1299 |
ConcurrentG1Refine *cg1r = G1CollectedHeap::heap()->concurrent_g1_refine(); |
|
1300 |
||
5033 | 1301 |
if (G1UseAdaptiveConcRefinement) { |
4481 | 1302 |
const int k_gy = 3, k_gr = 6; |
1303 |
const double inc_k = 1.1, dec_k = 0.9; |
|
1304 |
||
1305 |
int g = cg1r->green_zone(); |
|
1306 |
if (update_rs_time > goal_ms) { |
|
1307 |
g = (int)(g * dec_k); // Can become 0, that's OK. That would mean a mutator-only processing. |
|
1308 |
} else { |
|
1309 |
if (update_rs_time < goal_ms && update_rs_processed_buffers > g) { |
|
1310 |
g = (int)MAX2(g * inc_k, g + 1.0); |
|
1311 |
} |
|
1312 |
} |
|
1313 |
// Change the refinement threads params |
|
1314 |
cg1r->set_green_zone(g); |
|
1315 |
cg1r->set_yellow_zone(g * k_gy); |
|
1316 |
cg1r->set_red_zone(g * k_gr); |
|
1317 |
cg1r->reinitialize_threads(); |
|
1318 |
||
33214
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1319 |
int processing_threshold_delta = MAX2((int)(cg1r->green_zone() * _predictor.sigma()), 1); |
4481 | 1320 |
int processing_threshold = MIN2(cg1r->green_zone() + processing_threshold_delta, |
1321 |
cg1r->yellow_zone()); |
|
1322 |
// Change the barrier params |
|
1323 |
dcqs.set_process_completed_threshold(processing_threshold); |
|
1324 |
dcqs.set_max_completed_queue(cg1r->red_zone()); |
|
1325 |
} |
|
1326 |
||
1327 |
int curr_queue_size = dcqs.completed_buffers_num(); |
|
1328 |
if (curr_queue_size >= cg1r->yellow_zone()) { |
|
1329 |
dcqs.set_completed_queue_padding(curr_queue_size); |
|
1330 |
} else { |
|
1331 |
dcqs.set_completed_queue_padding(0); |
|
1332 |
} |
|
1333 |
dcqs.notify_if_necessary(); |
|
1334 |
} |
|
1335 |
||
33214
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1336 |
size_t G1CollectorPolicy::predict_rs_length_diff() const { |
35196
c83940b346b2
8143215: gcc 4.1.2: fix three issues breaking the build.
goetz
parents:
35163
diff
changeset
|
1337 |
return get_new_size_prediction(_rs_length_diff_seq); |
33214
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1338 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1339 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1340 |
double G1CollectorPolicy::predict_alloc_rate_ms() const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1341 |
return get_new_prediction(_alloc_rate_ms_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1342 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1343 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1344 |
double G1CollectorPolicy::predict_cost_per_card_ms() const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1345 |
return get_new_prediction(_cost_per_card_ms_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1346 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1347 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1348 |
double G1CollectorPolicy::predict_scan_hcc_ms() const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1349 |
return get_new_prediction(_cost_scan_hcc_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1350 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1351 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1352 |
double G1CollectorPolicy::predict_rs_update_time_ms(size_t pending_cards) const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1353 |
return pending_cards * predict_cost_per_card_ms() + predict_scan_hcc_ms(); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1354 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1355 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1356 |
double G1CollectorPolicy::predict_young_cards_per_entry_ratio() const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1357 |
return get_new_prediction(_young_cards_per_entry_ratio_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1358 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1359 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1360 |
double G1CollectorPolicy::predict_mixed_cards_per_entry_ratio() const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1361 |
if (_mixed_cards_per_entry_ratio_seq->num() < 2) { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1362 |
return predict_young_cards_per_entry_ratio(); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1363 |
} else { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1364 |
return get_new_prediction(_mixed_cards_per_entry_ratio_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1365 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1366 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1367 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1368 |
size_t G1CollectorPolicy::predict_young_card_num(size_t rs_length) const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1369 |
return (size_t) (rs_length * predict_young_cards_per_entry_ratio()); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1370 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1371 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1372 |
size_t G1CollectorPolicy::predict_non_young_card_num(size_t rs_length) const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1373 |
return (size_t)(rs_length * predict_mixed_cards_per_entry_ratio()); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1374 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1375 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1376 |
double G1CollectorPolicy::predict_rs_scan_time_ms(size_t card_num) const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1377 |
if (collector_state()->gcs_are_young()) { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1378 |
return card_num * get_new_prediction(_cost_per_entry_ms_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1379 |
} else { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1380 |
return predict_mixed_rs_scan_time_ms(card_num); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1381 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1382 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1383 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1384 |
double G1CollectorPolicy::predict_mixed_rs_scan_time_ms(size_t card_num) const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1385 |
if (_mixed_cost_per_entry_ms_seq->num() < 3) { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1386 |
return card_num * get_new_prediction(_cost_per_entry_ms_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1387 |
} else { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1388 |
return card_num * get_new_prediction(_mixed_cost_per_entry_ms_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1389 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1390 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1391 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1392 |
double G1CollectorPolicy::predict_object_copy_time_ms_during_cm(size_t bytes_to_copy) const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1393 |
if (_cost_per_byte_ms_during_cm_seq->num() < 3) { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1394 |
return (1.1 * bytes_to_copy) * get_new_prediction(_cost_per_byte_ms_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1395 |
} else { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1396 |
return bytes_to_copy * get_new_prediction(_cost_per_byte_ms_during_cm_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1397 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1398 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1399 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1400 |
double G1CollectorPolicy::predict_object_copy_time_ms(size_t bytes_to_copy) const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1401 |
if (collector_state()->during_concurrent_mark()) { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1402 |
return predict_object_copy_time_ms_during_cm(bytes_to_copy); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1403 |
} else { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1404 |
return bytes_to_copy * get_new_prediction(_cost_per_byte_ms_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1405 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1406 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1407 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1408 |
double G1CollectorPolicy::predict_constant_other_time_ms() const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1409 |
return get_new_prediction(_constant_other_time_ms_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1410 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1411 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1412 |
double G1CollectorPolicy::predict_young_other_time_ms(size_t young_num) const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1413 |
return young_num * get_new_prediction(_young_other_cost_per_region_ms_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1414 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1415 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1416 |
double G1CollectorPolicy::predict_non_young_other_time_ms(size_t non_young_num) const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1417 |
return non_young_num * get_new_prediction(_non_young_other_cost_per_region_ms_seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1418 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1419 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1420 |
double G1CollectorPolicy::predict_remark_time_ms() const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1421 |
return get_new_prediction(_concurrent_mark_remark_times_ms); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1422 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1423 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1424 |
double G1CollectorPolicy::predict_cleanup_time_ms() const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1425 |
return get_new_prediction(_concurrent_mark_cleanup_times_ms); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1426 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1427 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1428 |
double G1CollectorPolicy::predict_yg_surv_rate(int age, SurvRateGroup* surv_rate_group) const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1429 |
TruncatedSeq* seq = surv_rate_group->get_seq(age); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1430 |
guarantee(seq->num() > 0, "There should be some young gen survivor samples available. Tried to access with age %d", age); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1431 |
double pred = get_new_prediction(seq); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1432 |
if (pred > 1.0) { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1433 |
pred = 1.0; |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1434 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1435 |
return pred; |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1436 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1437 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1438 |
double G1CollectorPolicy::predict_yg_surv_rate(int age) const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1439 |
return predict_yg_surv_rate(age, _short_lived_surv_rate_group); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1440 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1441 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1442 |
double G1CollectorPolicy::accum_yg_surv_rate_pred(int age) const { |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1443 |
return _short_lived_surv_rate_group->accum_surv_rate_pred(age); |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1444 |
} |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1445 |
|
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1446 |
double G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards, |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1447 |
size_t scanned_cards) const { |
1374 | 1448 |
return |
1449 |
predict_rs_update_time_ms(pending_cards) + |
|
1450 |
predict_rs_scan_time_ms(scanned_cards) + |
|
1451 |
predict_constant_other_time_ms(); |
|
1452 |
} |
|
1453 |
||
33214
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1454 |
double G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards) const { |
13482 | 1455 |
size_t rs_length = predict_rs_length_diff(); |
1374 | 1456 |
size_t card_num; |
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1457 |
if (collector_state()->gcs_are_young()) { |
1374 | 1458 |
card_num = predict_young_card_num(rs_length); |
11249 | 1459 |
} else { |
1374 | 1460 |
card_num = predict_non_young_card_num(rs_length); |
11249 | 1461 |
} |
13482 | 1462 |
return predict_base_elapsed_time_ms(pending_cards, card_num); |
1374 | 1463 |
} |
1464 |
||
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
1465 |
size_t G1CollectorPolicy::predict_bytes_to_copy(HeapRegion* hr) const { |
1374 | 1466 |
size_t bytes_to_copy; |
1467 |
if (hr->is_marked()) |
|
1468 |
bytes_to_copy = hr->max_live_bytes(); |
|
1469 |
else { |
|
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
1470 |
assert(hr->is_young() && hr->age_in_surv_rate_group() != -1, "invariant"); |
1374 | 1471 |
int age = hr->age_in_surv_rate_group(); |
2009 | 1472 |
double yg_surv_rate = predict_yg_surv_rate(age, hr->surv_rate_group()); |
33214
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1473 |
bytes_to_copy = (size_t) (hr->used() * yg_surv_rate); |
1374 | 1474 |
} |
1475 |
return bytes_to_copy; |
|
1476 |
} |
|
1477 |
||
33214
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1478 |
double G1CollectorPolicy::predict_region_elapsed_time_ms(HeapRegion* hr, |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1479 |
bool for_young_gc) const { |
13482 | 1480 |
size_t rs_length = hr->rem_set()->occupied(); |
1481 |
size_t card_num; |
|
1482 |
||
1483 |
// Predicting the number of cards is based on which type of GC |
|
1484 |
// we're predicting for. |
|
1485 |
if (for_young_gc) { |
|
1486 |
card_num = predict_young_card_num(rs_length); |
|
1487 |
} else { |
|
1488 |
card_num = predict_non_young_card_num(rs_length); |
|
1489 |
} |
|
1490 |
size_t bytes_to_copy = predict_bytes_to_copy(hr); |
|
1491 |
||
1492 |
double region_elapsed_time_ms = |
|
1493 |
predict_rs_scan_time_ms(card_num) + |
|
1494 |
predict_object_copy_time_ms(bytes_to_copy); |
|
1495 |
||
1496 |
// The prediction of the "other" time for this region is based |
|
1497 |
// upon the region type and NOT the GC type. |
|
1498 |
if (hr->is_young()) { |
|
1499 |
region_elapsed_time_ms += predict_young_other_time_ms(1); |
|
1500 |
} else { |
|
1501 |
region_elapsed_time_ms += predict_non_young_other_time_ms(1); |
|
1502 |
} |
|
1503 |
return region_elapsed_time_ms; |
|
1504 |
} |
|
1505 |
||
33214
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1506 |
void G1CollectorPolicy::init_cset_region_lengths(uint eden_cset_region_length, |
5a00fba36171
8137082: Factor out G1 prediction code from G1CollectorPolicy and clean up
tschatzl
parents:
33204
diff
changeset
|
1507 |
uint survivor_cset_region_length) { |
11169
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1508 |
_eden_cset_region_length = eden_cset_region_length; |
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1509 |
_survivor_cset_region_length = survivor_cset_region_length; |
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1510 |
_old_cset_region_length = 0; |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1511 |
} |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1512 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1513 |
void G1CollectorPolicy::set_recorded_rs_lengths(size_t rs_lengths) { |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1514 |
_recorded_rs_lengths = rs_lengths; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1515 |
} |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1516 |
|
1374 | 1517 |
void G1CollectorPolicy::update_recent_gc_times(double end_time_sec, |
1518 |
double elapsed_ms) { |
|
1519 |
_recent_gc_times_ms->add(elapsed_ms); |
|
1520 |
_recent_prev_end_times_for_all_gcs_sec->add(end_time_sec); |
|
1521 |
_prev_collection_pause_end_ms = end_time_sec * 1000.0; |
|
1522 |
} |
|
1523 |
||
34673 | 1524 |
void G1CollectorPolicy::clear_ratio_check_data() { |
1525 |
_ratio_over_threshold_count = 0; |
|
1526 |
_ratio_over_threshold_sum = 0.0; |
|
1527 |
_pauses_since_start = 0; |
|
1528 |
} |
|
1529 |
||
1530 |
size_t G1CollectorPolicy::expansion_amount() { |
|
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
1531 |
double recent_gc_overhead = recent_avg_pause_time_ratio() * 100.0; |
34673 | 1532 |
double last_gc_overhead = _last_pause_time_ratio * 100.0; |
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
1533 |
double threshold = _gc_overhead_perc; |
34673 | 1534 |
size_t expand_bytes = 0; |
1535 |
||
1536 |
// If the heap is at less than half its maximum size, scale the threshold down, |
|
1537 |
// to a limit of 1. Thus the smaller the heap is, the more likely it is to expand, |
|
1538 |
// though the scaling code will likely keep the increase small. |
|
1539 |
if (_g1->capacity() <= _g1->max_capacity() / 2) { |
|
1540 |
threshold *= (double)_g1->capacity() / (double)(_g1->max_capacity() / 2); |
|
1541 |
threshold = MAX2(threshold, 1.0); |
|
1542 |
} |
|
1543 |
||
1544 |
// If the last GC time ratio is over the threshold, increment the count of |
|
1545 |
// times it has been exceeded, and add this ratio to the sum of exceeded |
|
1546 |
// ratios. |
|
1547 |
if (last_gc_overhead > threshold) { |
|
1548 |
_ratio_over_threshold_count++; |
|
1549 |
_ratio_over_threshold_sum += last_gc_overhead; |
|
1550 |
} |
|
1551 |
||
1552 |
// Check if we've had enough GC time ratio checks that were over the |
|
1553 |
// threshold to trigger an expansion. We'll also expand if we've |
|
1554 |
// reached the end of the history buffer and the average of all entries |
|
1555 |
// is still over the threshold. This indicates a smaller number of GCs were |
|
1556 |
// long enough to make the average exceed the threshold. |
|
1557 |
bool filled_history_buffer = _pauses_since_start == NumPrevPausesForHeuristics; |
|
1558 |
if ((_ratio_over_threshold_count == MinOverThresholdForGrowth) || |
|
1559 |
(filled_history_buffer && (recent_gc_overhead > threshold))) { |
|
1560 |
size_t min_expand_bytes = HeapRegion::GrainBytes; |
|
8103
65eafe3fb3c7
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
7923
diff
changeset
|
1561 |
size_t reserved_bytes = _g1->max_capacity(); |
1374 | 1562 |
size_t committed_bytes = _g1->capacity(); |
1563 |
size_t uncommitted_bytes = reserved_bytes - committed_bytes; |
|
1564 |
size_t expand_bytes_via_pct = |
|
2741 | 1565 |
uncommitted_bytes * G1ExpandByPercentOfAvailable / 100; |
34673 | 1566 |
double scale_factor = 1.0; |
1567 |
||
1568 |
// If the current size is less than 1/4 of the Initial heap size, expand |
|
1569 |
// by half of the delta between the current and Initial sizes. IE, grow |
|
1570 |
// back quickly. |
|
1571 |
// |
|
1572 |
// Otherwise, take the current size, or G1ExpandByPercentOfAvailable % of |
|
1573 |
// the available expansion space, whichever is smaller, as the base |
|
1574 |
// expansion size. Then possibly scale this size according to how much the |
|
1575 |
// threshold has (on average) been exceeded by. If the delta is small |
|
1576 |
// (less than the StartScaleDownAt value), scale the size down linearly, but |
|
1577 |
// not by less than MinScaleDownFactor. If the delta is large (greater than |
|
1578 |
// the StartScaleUpAt value), scale up, but adding no more than MaxScaleUpFactor |
|
1579 |
// times the base size. The scaling will be linear in the range from |
|
1580 |
// StartScaleUpAt to (StartScaleUpAt + ScaleUpRange). In other words, |
|
1581 |
// ScaleUpRange sets the rate of scaling up. |
|
1582 |
if (committed_bytes < InitialHeapSize / 4) { |
|
1583 |
expand_bytes = (InitialHeapSize - committed_bytes) / 2; |
|
1584 |
} else { |
|
1585 |
double const MinScaleDownFactor = 0.2; |
|
1586 |
double const MaxScaleUpFactor = 2; |
|
1587 |
double const StartScaleDownAt = _gc_overhead_perc; |
|
1588 |
double const StartScaleUpAt = _gc_overhead_perc * 1.5; |
|
1589 |
double const ScaleUpRange = _gc_overhead_perc * 2.0; |
|
1590 |
||
1591 |
double ratio_delta; |
|
1592 |
if (filled_history_buffer) { |
|
1593 |
ratio_delta = recent_gc_overhead - threshold; |
|
1594 |
} else { |
|
1595 |
ratio_delta = (_ratio_over_threshold_sum/_ratio_over_threshold_count) - threshold; |
|
1596 |
} |
|
1597 |
||
1598 |
expand_bytes = MIN2(expand_bytes_via_pct, committed_bytes); |
|
1599 |
if (ratio_delta < StartScaleDownAt) { |
|
1600 |
scale_factor = ratio_delta / StartScaleDownAt; |
|
1601 |
scale_factor = MAX2(scale_factor, MinScaleDownFactor); |
|
1602 |
} else if (ratio_delta > StartScaleUpAt) { |
|
1603 |
scale_factor = 1 + ((ratio_delta - StartScaleUpAt) / ScaleUpRange); |
|
1604 |
scale_factor = MIN2(scale_factor, MaxScaleUpFactor); |
|
1605 |
} |
|
1606 |
} |
|
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
1607 |
|
35061 | 1608 |
log_debug(gc, ergo, heap)("Attempt heap expansion (recent GC overhead higher than threshold after GC) " |
1609 |
"recent GC overhead: %1.2f %% threshold: %1.2f %% uncommitted: " SIZE_FORMAT "B base expansion amount and scale: " SIZE_FORMAT "B (%1.2f%%)", |
|
1610 |
recent_gc_overhead, threshold, uncommitted_bytes, expand_bytes, scale_factor * 100); |
|
34673 | 1611 |
|
1612 |
expand_bytes = static_cast<size_t>(expand_bytes * scale_factor); |
|
1613 |
||
1614 |
// Ensure the expansion size is at least the minimum growth amount |
|
1615 |
// and at most the remaining uncommitted byte size. |
|
1616 |
expand_bytes = MAX2(expand_bytes, min_expand_bytes); |
|
1617 |
expand_bytes = MIN2(expand_bytes, uncommitted_bytes); |
|
1618 |
||
1619 |
clear_ratio_check_data(); |
|
1374 | 1620 |
} else { |
34673 | 1621 |
// An expansion was not triggered. If we've started counting, increment |
1622 |
// the number of checks we've made in the current window. If we've |
|
1623 |
// reached the end of the window without resizing, clear the counters to |
|
1624 |
// start again the next time we see a ratio above the threshold. |
|
1625 |
if (_ratio_over_threshold_count > 0) { |
|
1626 |
_pauses_since_start++; |
|
1627 |
if (_pauses_since_start > NumPrevPausesForHeuristics) { |
|
1628 |
clear_ratio_check_data(); |
|
1629 |
} |
|
1630 |
} |
|
1374 | 1631 |
} |
34673 | 1632 |
|
1633 |
return expand_bytes; |
|
1374 | 1634 |
} |
1635 |
||
1636 |
void G1CollectorPolicy::print_yg_surv_rate_info() const { |
|
1637 |
#ifndef PRODUCT |
|
1638 |
_short_lived_surv_rate_group->print_surv_rate_summary(); |
|
1639 |
// add this call for any other surv rate groups |
|
1640 |
#endif // PRODUCT |
|
1641 |
} |
|
1642 |
||
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
1643 |
bool G1CollectorPolicy::is_young_list_full() const { |
27892
06a143c836ad
8065305: Make it possible to extend the G1CollectorPolicy
jwilhelm
parents:
27626
diff
changeset
|
1644 |
uint young_list_length = _g1->young_list()->length(); |
06a143c836ad
8065305: Make it possible to extend the G1CollectorPolicy
jwilhelm
parents:
27626
diff
changeset
|
1645 |
uint young_list_target_length = _young_list_target_length; |
06a143c836ad
8065305: Make it possible to extend the G1CollectorPolicy
jwilhelm
parents:
27626
diff
changeset
|
1646 |
return young_list_length >= young_list_target_length; |
06a143c836ad
8065305: Make it possible to extend the G1CollectorPolicy
jwilhelm
parents:
27626
diff
changeset
|
1647 |
} |
06a143c836ad
8065305: Make it possible to extend the G1CollectorPolicy
jwilhelm
parents:
27626
diff
changeset
|
1648 |
|
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
1649 |
bool G1CollectorPolicy::can_expand_young_list() const { |
27892
06a143c836ad
8065305: Make it possible to extend the G1CollectorPolicy
jwilhelm
parents:
27626
diff
changeset
|
1650 |
uint young_list_length = _g1->young_list()->length(); |
06a143c836ad
8065305: Make it possible to extend the G1CollectorPolicy
jwilhelm
parents:
27626
diff
changeset
|
1651 |
uint young_list_max_length = _young_list_max_length; |
06a143c836ad
8065305: Make it possible to extend the G1CollectorPolicy
jwilhelm
parents:
27626
diff
changeset
|
1652 |
return young_list_length < young_list_max_length; |
06a143c836ad
8065305: Make it possible to extend the G1CollectorPolicy
jwilhelm
parents:
27626
diff
changeset
|
1653 |
} |
06a143c836ad
8065305: Make it possible to extend the G1CollectorPolicy
jwilhelm
parents:
27626
diff
changeset
|
1654 |
|
36102
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
1655 |
bool G1CollectorPolicy::adaptive_young_list_length() const { |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
1656 |
return _young_gen_sizer->adaptive_young_list_length(); |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
1657 |
} |
84546518799d
8149820: Move G1YoungGenSizer to g1CollectorPolicy.cpp
ehelin
parents:
36090
diff
changeset
|
1658 |
|
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
1659 |
void G1CollectorPolicy::update_max_gc_locker_expansion() { |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
1660 |
uint expansion_region_num = 0; |
7416
cfe3bfab7d48
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
7398
diff
changeset
|
1661 |
if (GCLockerEdenExpansionPercent > 0) { |
cfe3bfab7d48
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
7398
diff
changeset
|
1662 |
double perc = (double) GCLockerEdenExpansionPercent / 100.0; |
cfe3bfab7d48
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
7398
diff
changeset
|
1663 |
double expansion_region_num_d = perc * (double) _young_list_target_length; |
cfe3bfab7d48
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
7398
diff
changeset
|
1664 |
// We use ceiling so that if expansion_region_num_d is > 0.0 (but |
cfe3bfab7d48
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
7398
diff
changeset
|
1665 |
// less than 1.0) we'll get 1. |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
1666 |
expansion_region_num = (uint) ceil(expansion_region_num_d); |
7416
cfe3bfab7d48
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
7398
diff
changeset
|
1667 |
} else { |
cfe3bfab7d48
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
7398
diff
changeset
|
1668 |
assert(expansion_region_num == 0, "sanity"); |
cfe3bfab7d48
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
7398
diff
changeset
|
1669 |
} |
cfe3bfab7d48
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
7398
diff
changeset
|
1670 |
_young_list_max_length = _young_list_target_length + expansion_region_num; |
cfe3bfab7d48
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
7398
diff
changeset
|
1671 |
assert(_young_list_target_length <= _young_list_max_length, "post-condition"); |
cfe3bfab7d48
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
7398
diff
changeset
|
1672 |
} |
cfe3bfab7d48
6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents:
7398
diff
changeset
|
1673 |
|
2009 | 1674 |
// Calculates survivor space parameters. |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
1675 |
void G1CollectorPolicy::update_survivors_policy() { |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
1676 |
double max_survivor_regions_d = |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
1677 |
(double) _young_list_target_length / (double) SurvivorRatio; |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
1678 |
// We use ceiling so that if max_survivor_regions_d is > 0.0 (but |
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
1679 |
// smaller than 1.0) we'll get 1. |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
1680 |
_max_survivor_regions = (uint) ceil(max_survivor_regions_d); |
10528
06fab03478df
7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents:
10523
diff
changeset
|
1681 |
|
10281
ad7517425333
7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize
tonyp
parents:
10280
diff
changeset
|
1682 |
_tenuring_threshold = _survivors_age_table.compute_tenuring_threshold( |
30147
af9a41999c6e
8076314: Remove the static instance variable SharedHeap:: _sh
brutisso
parents:
29795
diff
changeset
|
1683 |
HeapRegion::GrainWords * _max_survivor_regions, counters()); |
2009 | 1684 |
} |
1685 |
||
33808
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
1686 |
bool G1CollectorPolicy::force_initial_mark_if_outside_cycle(GCCause::Cause gc_cause) { |
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
1687 |
// We actually check whether we are marking here and not if we are in a |
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
1688 |
// reclamation phase. This means that we will schedule a concurrent mark |
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
1689 |
// even while we are still in the process of reclaiming memory. |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
1690 |
bool during_cycle = _g1->concurrent_mark()->cmThread()->during_cycle(); |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
1691 |
if (!during_cycle) { |
35061 | 1692 |
log_debug(gc, ergo)("Request concurrent cycle initiation (requested by GC cause). GC cause: %s", GCCause::to_string(gc_cause)); |
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1693 |
collector_state()->set_initiate_conc_mark_if_possible(true); |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
1694 |
return true; |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
1695 |
} else { |
35061 | 1696 |
log_debug(gc, ergo)("Do not request concurrent cycle initiation (concurrent cycle already in progress). GC cause: %s", GCCause::to_string(gc_cause)); |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
1697 |
return false; |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
1698 |
} |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
1699 |
} |
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
1700 |
|
34619
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1701 |
void G1CollectorPolicy::initiate_conc_mark() { |
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1702 |
collector_state()->set_during_initial_mark_pause(true); |
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1703 |
collector_state()->set_initiate_conc_mark_if_possible(false); |
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1704 |
} |
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1705 |
|
33808
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
1706 |
void G1CollectorPolicy::decide_on_conc_mark_initiation() { |
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1707 |
// We are about to decide on whether this pause will be an |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1708 |
// initial-mark pause. |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1709 |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1710 |
// First, collector_state()->during_initial_mark_pause() should not be already set. We |
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1711 |
// will set it here if we have to. However, it should be cleared by |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1712 |
// the end of the pause (it's only set for the duration of an |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1713 |
// initial-mark pause). |
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1714 |
assert(!collector_state()->during_initial_mark_pause(), "pre-condition"); |
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1715 |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
1716 |
if (collector_state()->initiate_conc_mark_if_possible()) { |
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1717 |
// We had noticed on a previous pause that the heap occupancy has |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1718 |
// gone over the initiating threshold and we should start a |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1719 |
// concurrent marking cycle. So we might initiate one. |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1720 |
|
33808
ee899178e46b
8140597: Forcing an initial mark causes G1 to abort mixed collections
tschatzl
parents:
33771
diff
changeset
|
1721 |
if (!about_to_start_mixed_phase() && collector_state()->gcs_are_young()) { |
34619
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1722 |
// Initiate a new initial mark if there is no marking or reclamation going on. |
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1723 |
initiate_conc_mark(); |
35061 | 1724 |
log_debug(gc, ergo)("Initiate concurrent cycle (concurrent cycle initiation requested)"); |
34619
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1725 |
} else if (_g1->is_user_requested_concurrent_full_gc(_g1->gc_cause())) { |
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1726 |
// Initiate a user requested initial mark. An initial mark must be young only |
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1727 |
// GC, so the collector state must be updated to reflect this. |
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1728 |
collector_state()->set_gcs_are_young(true); |
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1729 |
collector_state()->set_last_young_gc(false); |
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1730 |
|
34619
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1731 |
abort_time_to_mixed_tracking(); |
83b1fedf01e9
8143251: HeapRetentionTest.java Test is failing on jdk9/dev
sjohanss
parents:
34611
diff
changeset
|
1732 |
initiate_conc_mark(); |
35061 | 1733 |
log_debug(gc, ergo)("Initiate concurrent cycle (user requested concurrent cycle)"); |
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1734 |
} else { |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1735 |
// The concurrent marking thread is still finishing up the |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1736 |
// previous cycle. If we start one right now the two cycles |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1737 |
// overlap. In particular, the concurrent marking thread might |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1738 |
// be in the process of clearing the next marking bitmap (which |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1739 |
// we will use for the next cycle if we start one). Starting a |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1740 |
// cycle now will be bad given that parts of the marking |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1741 |
// information might get cleared by the marking thread. And we |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1742 |
// cannot wait for the marking thread to finish the cycle as it |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1743 |
// periodically yields while clearing the next marking bitmap |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1744 |
// and, if it's in a yield point, it's waiting for us to |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1745 |
// finish. So, at this point we will not start a cycle and we'll |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1746 |
// let the concurrent marking thread complete the last one. |
35061 | 1747 |
log_debug(gc, ergo)("Do not initiate concurrent cycle (concurrent cycle already in progress)"); |
5243
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1748 |
} |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1749 |
} |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1750 |
} |
99e5a8f5d81f
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
5240
diff
changeset
|
1751 |
|
1374 | 1752 |
class ParKnownGarbageHRClosure: public HeapRegionClosure { |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
1753 |
G1CollectedHeap* _g1h; |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13288
diff
changeset
|
1754 |
CSetChooserParUpdater _cset_updater; |
1374 | 1755 |
|
1756 |
public: |
|
1757 |
ParKnownGarbageHRClosure(CollectionSetChooser* hrSorted, |
|
12382
6aaecb1cbfe1
7145441: G1: collection set chooser-related cleanup
tonyp
parents:
12381
diff
changeset
|
1758 |
uint chunk_size) : |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13288
diff
changeset
|
1759 |
_g1h(G1CollectedHeap::heap()), |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13288
diff
changeset
|
1760 |
_cset_updater(hrSorted, true /* parallel */, chunk_size) { } |
1374 | 1761 |
|
1762 |
bool doHeapRegion(HeapRegion* r) { |
|
1763 |
// Do we have any marking information for this region? |
|
1764 |
if (r->is_marked()) { |
|
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
1765 |
// We will skip any region that's currently used as an old GC |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
1766 |
// alloc region (we should not consider those for collection |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
1767 |
// before we fill them up). |
13336
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13288
diff
changeset
|
1768 |
if (_cset_updater.should_add(r) && !_g1h->is_old_gc_alloc_region(r)) { |
e582172ff6ff
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
13288
diff
changeset
|
1769 |
_cset_updater.add_region(r); |
1374 | 1770 |
} |
1771 |
} |
|
1772 |
return false; |
|
1773 |
} |
|
1774 |
}; |
|
1775 |
||
1776 |
class ParKnownGarbageTask: public AbstractGangTask { |
|
1777 |
CollectionSetChooser* _hrSorted; |
|
12382
6aaecb1cbfe1
7145441: G1: collection set chooser-related cleanup
tonyp
parents:
12381
diff
changeset
|
1778 |
uint _chunk_size; |
1374 | 1779 |
G1CollectedHeap* _g1; |
27009
e7e723732b6b
8058298: Separate heap region iterator claim values from the data structures iterated over
mlarsson
parents:
26696
diff
changeset
|
1780 |
HeapRegionClaimer _hrclaimer; |
e7e723732b6b
8058298: Separate heap region iterator claim values from the data structures iterated over
mlarsson
parents:
26696
diff
changeset
|
1781 |
|
1374 | 1782 |
public: |
27009
e7e723732b6b
8058298: Separate heap region iterator claim values from the data structures iterated over
mlarsson
parents:
26696
diff
changeset
|
1783 |
ParKnownGarbageTask(CollectionSetChooser* hrSorted, uint chunk_size, uint n_workers) : |
e7e723732b6b
8058298: Separate heap region iterator claim values from the data structures iterated over
mlarsson
parents:
26696
diff
changeset
|
1784 |
AbstractGangTask("ParKnownGarbageTask"), |
e7e723732b6b
8058298: Separate heap region iterator claim values from the data structures iterated over
mlarsson
parents:
26696
diff
changeset
|
1785 |
_hrSorted(hrSorted), _chunk_size(chunk_size), |
e7e723732b6b
8058298: Separate heap region iterator claim values from the data structures iterated over
mlarsson
parents:
26696
diff
changeset
|
1786 |
_g1(G1CollectedHeap::heap()), _hrclaimer(n_workers) {} |
1374 | 1787 |
|
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11395
diff
changeset
|
1788 |
void work(uint worker_id) { |
12382
6aaecb1cbfe1
7145441: G1: collection set chooser-related cleanup
tonyp
parents:
12381
diff
changeset
|
1789 |
ParKnownGarbageHRClosure parKnownGarbageCl(_hrSorted, _chunk_size); |
27009
e7e723732b6b
8058298: Separate heap region iterator claim values from the data structures iterated over
mlarsson
parents:
26696
diff
changeset
|
1790 |
_g1->heap_region_par_iterate(&parKnownGarbageCl, worker_id, &_hrclaimer); |
1374 | 1791 |
} |
1792 |
}; |
|
1793 |
||
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
1794 |
uint G1CollectorPolicy::calculate_parallel_work_chunk_size(uint n_workers, uint n_regions) const { |
27626
5dad25da637c
8054491: Remove wrong assert and refactor code in G1CollectorPolicy::record_concurrent_mark_end
mlarsson
parents:
27251
diff
changeset
|
1795 |
assert(n_workers > 0, "Active gc workers should be greater than 0"); |
5dad25da637c
8054491: Remove wrong assert and refactor code in G1CollectorPolicy::record_concurrent_mark_end
mlarsson
parents:
27251
diff
changeset
|
1796 |
const uint overpartition_factor = 4; |
5dad25da637c
8054491: Remove wrong assert and refactor code in G1CollectorPolicy::record_concurrent_mark_end
mlarsson
parents:
27251
diff
changeset
|
1797 |
const uint min_chunk_size = MAX2(n_regions / n_workers, 1U); |
5dad25da637c
8054491: Remove wrong assert and refactor code in G1CollectorPolicy::record_concurrent_mark_end
mlarsson
parents:
27251
diff
changeset
|
1798 |
return MAX2(n_regions / (n_workers * overpartition_factor), min_chunk_size); |
5dad25da637c
8054491: Remove wrong assert and refactor code in G1CollectorPolicy::record_concurrent_mark_end
mlarsson
parents:
27251
diff
changeset
|
1799 |
} |
5dad25da637c
8054491: Remove wrong assert and refactor code in G1CollectorPolicy::record_concurrent_mark_end
mlarsson
parents:
27251
diff
changeset
|
1800 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1801 |
void G1CollectorPolicy::record_concurrent_mark_cleanup_end() { |
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
1802 |
cset_chooser()->clear(); |
10746
96f50959f650
7088680: G1: Cleanup in the G1CollectorPolicy class
tonyp
parents:
10677
diff
changeset
|
1803 |
|
32360 | 1804 |
WorkGang* workers = _g1->workers(); |
30874
18714bae50db
8080837: Move number of workers calculation out of CollectionSetChooser::prepare_for_par_region_addition
stefank
parents:
30764
diff
changeset
|
1805 |
uint n_workers = workers->active_workers(); |
18714bae50db
8080837: Move number of workers calculation out of CollectionSetChooser::prepare_for_par_region_addition
stefank
parents:
30764
diff
changeset
|
1806 |
|
27626
5dad25da637c
8054491: Remove wrong assert and refactor code in G1CollectorPolicy::record_concurrent_mark_end
mlarsson
parents:
27251
diff
changeset
|
1807 |
uint n_regions = _g1->num_regions(); |
5dad25da637c
8054491: Remove wrong assert and refactor code in G1CollectorPolicy::record_concurrent_mark_end
mlarsson
parents:
27251
diff
changeset
|
1808 |
uint chunk_size = calculate_parallel_work_chunk_size(n_workers, n_regions); |
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
1809 |
cset_chooser()->prepare_for_par_region_addition(n_workers, n_regions, chunk_size); |
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
1810 |
ParKnownGarbageTask par_known_garbage_task(cset_chooser(), chunk_size, n_workers); |
30874
18714bae50db
8080837: Move number of workers calculation out of CollectionSetChooser::prepare_for_par_region_addition
stefank
parents:
30764
diff
changeset
|
1811 |
workers->run_task(&par_known_garbage_task); |
10746
96f50959f650
7088680: G1: Cleanup in the G1CollectorPolicy class
tonyp
parents:
10677
diff
changeset
|
1812 |
|
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
1813 |
cset_chooser()->sort_regions(); |
12382
6aaecb1cbfe1
7145441: G1: collection set chooser-related cleanup
tonyp
parents:
12381
diff
changeset
|
1814 |
|
10746
96f50959f650
7088680: G1: Cleanup in the G1CollectorPolicy class
tonyp
parents:
10677
diff
changeset
|
1815 |
double end_sec = os::elapsedTime(); |
96f50959f650
7088680: G1: Cleanup in the G1CollectorPolicy class
tonyp
parents:
10677
diff
changeset
|
1816 |
double elapsed_time_ms = (end_sec - _mark_cleanup_start_sec) * 1000.0; |
96f50959f650
7088680: G1: Cleanup in the G1CollectorPolicy class
tonyp
parents:
10677
diff
changeset
|
1817 |
_concurrent_mark_cleanup_times_ms->add(elapsed_time_ms); |
96f50959f650
7088680: G1: Cleanup in the G1CollectorPolicy class
tonyp
parents:
10677
diff
changeset
|
1818 |
_prev_collection_pause_end_ms += elapsed_time_ms; |
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1819 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
1820 |
record_pause(Cleanup, _mark_cleanup_start_sec, end_sec); |
1374 | 1821 |
} |
1822 |
||
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1823 |
// Add the heap region at the head of the non-incremental collection set |
11169
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1824 |
void G1CollectorPolicy::add_old_region_to_cset(HeapRegion* hr) { |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1825 |
assert(_inc_cset_build_state == Active, "Precondition"); |
26696
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26157
diff
changeset
|
1826 |
assert(hr->is_old(), "the region should be old"); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1827 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1828 |
assert(!hr->in_collection_set(), "should not already be in the CSet"); |
29470
e34bbcd36e53
8030646: track collection set membership in one place
ehelin
parents:
29465
diff
changeset
|
1829 |
_g1->register_old_region_with_cset(hr); |
1374 | 1830 |
hr->set_next_in_collection_set(_collection_set); |
1831 |
_collection_set = hr; |
|
1832 |
_collection_set_bytes_used_before += hr->used(); |
|
11169
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1833 |
size_t rs_length = hr->rem_set()->occupied(); |
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1834 |
_recorded_rs_lengths += rs_length; |
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
1835 |
_old_cset_region_length += 1; |
1374 | 1836 |
} |
1837 |
||
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1838 |
// Initialize the per-collection-set information |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1839 |
void G1CollectorPolicy::start_incremental_cset_building() { |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1840 |
assert(_inc_cset_build_state == Inactive, "Precondition"); |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1841 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1842 |
_inc_cset_head = NULL; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1843 |
_inc_cset_tail = NULL; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1844 |
_inc_cset_bytes_used_before = 0; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1845 |
|
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1846 |
_inc_cset_recorded_rs_lengths = 0; |
11395
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1847 |
_inc_cset_recorded_rs_lengths_diffs = 0; |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1848 |
_inc_cset_predicted_elapsed_time_ms = 0.0; |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1849 |
_inc_cset_predicted_elapsed_time_ms_diffs = 0.0; |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1850 |
_inc_cset_build_state = Active; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1851 |
} |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1852 |
|
11395
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1853 |
void G1CollectorPolicy::finalize_incremental_cset_building() { |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1854 |
assert(_inc_cset_build_state == Active, "Precondition"); |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1855 |
assert(SafepointSynchronize::is_at_safepoint(), "should be at a safepoint"); |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1856 |
|
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1857 |
// The two "main" fields, _inc_cset_recorded_rs_lengths and |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1858 |
// _inc_cset_predicted_elapsed_time_ms, are updated by the thread |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1859 |
// that adds a new region to the CSet. Further updates by the |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1860 |
// concurrent refinement thread that samples the young RSet lengths |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1861 |
// are accumulated in the *_diffs fields. Here we add the diffs to |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1862 |
// the "main" fields. |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1863 |
|
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1864 |
if (_inc_cset_recorded_rs_lengths_diffs >= 0) { |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1865 |
_inc_cset_recorded_rs_lengths += _inc_cset_recorded_rs_lengths_diffs; |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1866 |
} else { |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1867 |
// This is defensive. The diff should in theory be always positive |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1868 |
// as RSets can only grow between GCs. However, given that we |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1869 |
// sample their size concurrently with other threads updating them |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1870 |
// it's possible that we might get the wrong size back, which |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1871 |
// could make the calculations somewhat inaccurate. |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1872 |
size_t diffs = (size_t) (-_inc_cset_recorded_rs_lengths_diffs); |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1873 |
if (_inc_cset_recorded_rs_lengths >= diffs) { |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1874 |
_inc_cset_recorded_rs_lengths -= diffs; |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1875 |
} else { |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1876 |
_inc_cset_recorded_rs_lengths = 0; |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1877 |
} |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1878 |
} |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1879 |
_inc_cset_predicted_elapsed_time_ms += |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1880 |
_inc_cset_predicted_elapsed_time_ms_diffs; |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1881 |
|
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1882 |
_inc_cset_recorded_rs_lengths_diffs = 0; |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1883 |
_inc_cset_predicted_elapsed_time_ms_diffs = 0.0; |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1884 |
} |
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
1885 |
|
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1886 |
void G1CollectorPolicy::add_to_incremental_cset_info(HeapRegion* hr, size_t rs_length) { |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1887 |
// This routine is used when: |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1888 |
// * adding survivor regions to the incremental cset at the end of an |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1889 |
// evacuation pause, |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
1890 |
// * adding the current allocation region to the incremental cset |
cccf0925702e
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1891 |
// when it is retired, and |
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|
1892 |
// * updating existing policy information for a region in the |
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|
1893 |
// incremental cset via young list RSet sampling. |
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|
1894 |
// Therefore this routine may be called at a safepoint by the |
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|
1895 |
// VM thread, or in-between safepoints by mutator threads (when |
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|
1896 |
// retiring the current allocation region) or a concurrent |
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|
1897 |
// refine thread (RSet sampling). |
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|
1898 |
|
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|
1899 |
double region_elapsed_time_ms = predict_region_elapsed_time_ms(hr, collector_state()->gcs_are_young()); |
5350
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|
1900 |
size_t used_bytes = hr->used(); |
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|
1901 |
_inc_cset_recorded_rs_lengths += rs_length; |
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|
1902 |
_inc_cset_predicted_elapsed_time_ms += region_elapsed_time_ms; |
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|
1903 |
_inc_cset_bytes_used_before += used_bytes; |
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|
1904 |
|
22551 | 1905 |
// Cache the values we have added to the aggregated information |
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|
1906 |
// in the heap region in case we have to remove this region from |
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|
1907 |
// the incremental collection set, or it is updated by the |
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|
1908 |
// rset sampling code |
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|
1909 |
hr->set_recorded_rs_length(rs_length); |
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|
1910 |
hr->set_predicted_elapsed_time_ms(region_elapsed_time_ms); |
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|
1911 |
} |
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|
1912 |
|
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|
1913 |
void G1CollectorPolicy::update_incremental_cset_info(HeapRegion* hr, |
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|
1914 |
size_t new_rs_length) { |
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|
1915 |
// Update the CSet information that is dependent on the new RS length |
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|
1916 |
assert(hr->is_young(), "Precondition"); |
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|
1917 |
assert(!SafepointSynchronize::is_at_safepoint(), |
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|
1918 |
"should not be at a safepoint"); |
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|
1919 |
|
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|
1920 |
// We could have updated _inc_cset_recorded_rs_lengths and |
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|
1921 |
// _inc_cset_predicted_elapsed_time_ms directly but we'd need to do |
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|
1922 |
// that atomically, as this code is executed by a concurrent |
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|
1923 |
// refinement thread, potentially concurrently with a mutator thread |
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|
1924 |
// allocating a new region and also updating the same fields. To |
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|
1925 |
// avoid the atomic operations we accumulate these updates on two |
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|
1926 |
// separate fields (*_diffs) and we'll just add them to the "main" |
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|
1927 |
// fields at the start of a GC. |
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|
1928 |
|
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|
1929 |
ssize_t old_rs_length = (ssize_t) hr->recorded_rs_length(); |
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|
1930 |
ssize_t rs_lengths_diff = (ssize_t) new_rs_length - old_rs_length; |
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|
1931 |
_inc_cset_recorded_rs_lengths_diffs += rs_lengths_diff; |
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|
1932 |
|
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|
1933 |
double old_elapsed_time_ms = hr->predicted_elapsed_time_ms(); |
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|
1934 |
double new_region_elapsed_time_ms = predict_region_elapsed_time_ms(hr, collector_state()->gcs_are_young()); |
11395
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|
1935 |
double elapsed_ms_diff = new_region_elapsed_time_ms - old_elapsed_time_ms; |
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|
1936 |
_inc_cset_predicted_elapsed_time_ms_diffs += elapsed_ms_diff; |
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|
1937 |
|
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|
1938 |
hr->set_recorded_rs_length(new_rs_length); |
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|
1939 |
hr->set_predicted_elapsed_time_ms(new_region_elapsed_time_ms); |
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|
1940 |
} |
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|
1941 |
|
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|
1942 |
void G1CollectorPolicy::add_region_to_incremental_cset_common(HeapRegion* hr) { |
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|
1943 |
assert(hr->is_young(), "invariant"); |
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|
1944 |
assert(hr->young_index_in_cset() > -1, "should have already been set"); |
5350
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|
1945 |
assert(_inc_cset_build_state == Active, "Precondition"); |
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|
1946 |
|
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|
1947 |
// We need to clear and set the cached recorded/cached collection set |
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|
1948 |
// information in the heap region here (before the region gets added |
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|
1949 |
// to the collection set). An individual heap region's cached values |
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|
1950 |
// are calculated, aggregated with the policy collection set info, |
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|
1951 |
// and cached in the heap region here (initially) and (subsequently) |
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|
1952 |
// by the Young List sampling code. |
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|
1953 |
|
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|
1954 |
size_t rs_length = hr->rem_set()->occupied(); |
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|
1955 |
add_to_incremental_cset_info(hr, rs_length); |
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|
1956 |
|
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|
1957 |
assert(!hr->in_collection_set(), "invariant"); |
29470
e34bbcd36e53
8030646: track collection set membership in one place
ehelin
parents:
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diff
changeset
|
1958 |
_g1->register_young_region_with_cset(hr); |
e34bbcd36e53
8030646: track collection set membership in one place
ehelin
parents:
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diff
changeset
|
1959 |
assert(hr->next_in_collection_set() == NULL, "invariant"); |
5350
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|
1960 |
} |
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changeset
|
1961 |
|
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|
1962 |
// Add the region at the RHS of the incremental cset |
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|
1963 |
void G1CollectorPolicy::add_region_to_incremental_cset_rhs(HeapRegion* hr) { |
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|
1964 |
// We should only ever be appending survivors at the end of a pause |
26696
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8057768: Make heap region region type in G1 HeapRegion explicit
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changeset
|
1965 |
assert(hr->is_survivor(), "Logic"); |
5350
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|
1966 |
|
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|
1967 |
// Do the 'common' stuff |
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|
1968 |
add_region_to_incremental_cset_common(hr); |
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|
1969 |
|
cccf0925702e
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changeset
|
1970 |
// Now add the region at the right hand side |
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changeset
|
1971 |
if (_inc_cset_tail == NULL) { |
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changeset
|
1972 |
assert(_inc_cset_head == NULL, "invariant"); |
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changeset
|
1973 |
_inc_cset_head = hr; |
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changeset
|
1974 |
} else { |
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changeset
|
1975 |
_inc_cset_tail->set_next_in_collection_set(hr); |
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changeset
|
1976 |
} |
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changeset
|
1977 |
_inc_cset_tail = hr; |
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changeset
|
1978 |
} |
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changeset
|
1979 |
|
cccf0925702e
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changeset
|
1980 |
// Add the region to the LHS of the incremental cset |
cccf0925702e
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changeset
|
1981 |
void G1CollectorPolicy::add_region_to_incremental_cset_lhs(HeapRegion* hr) { |
cccf0925702e
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changeset
|
1982 |
// Survivors should be added to the RHS at the end of a pause |
26696
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
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26157
diff
changeset
|
1983 |
assert(hr->is_eden(), "Logic"); |
5350
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parents:
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diff
changeset
|
1984 |
|
cccf0925702e
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parents:
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diff
changeset
|
1985 |
// Do the 'common' stuff |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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changeset
|
1986 |
add_region_to_incremental_cset_common(hr); |
cccf0925702e
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diff
changeset
|
1987 |
|
cccf0925702e
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diff
changeset
|
1988 |
// Add the region at the left hand side |
cccf0925702e
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changeset
|
1989 |
hr->set_next_in_collection_set(_inc_cset_head); |
cccf0925702e
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changeset
|
1990 |
if (_inc_cset_head == NULL) { |
cccf0925702e
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diff
changeset
|
1991 |
assert(_inc_cset_tail == NULL, "Invariant"); |
cccf0925702e
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diff
changeset
|
1992 |
_inc_cset_tail = hr; |
cccf0925702e
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diff
changeset
|
1993 |
} |
cccf0925702e
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parents:
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diff
changeset
|
1994 |
_inc_cset_head = hr; |
cccf0925702e
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parents:
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diff
changeset
|
1995 |
} |
cccf0925702e
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johnc
parents:
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diff
changeset
|
1996 |
|
cccf0925702e
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changeset
|
1997 |
#ifndef PRODUCT |
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changeset
|
1998 |
void G1CollectorPolicy::print_collection_set(HeapRegion* list_head, outputStream* st) { |
cccf0925702e
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diff
changeset
|
1999 |
assert(list_head == inc_cset_head() || list_head == collection_set(), "must be"); |
cccf0925702e
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diff
changeset
|
2000 |
|
cccf0925702e
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diff
changeset
|
2001 |
st->print_cr("\nCollection_set:"); |
cccf0925702e
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changeset
|
2002 |
HeapRegion* csr = list_head; |
cccf0925702e
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changeset
|
2003 |
while (csr != NULL) { |
cccf0925702e
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changeset
|
2004 |
HeapRegion* next = csr->next_in_collection_set(); |
cccf0925702e
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changeset
|
2005 |
assert(csr->in_collection_set(), "bad CS"); |
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
31331
diff
changeset
|
2006 |
st->print_cr(" " HR_FORMAT ", P: " PTR_FORMAT "N: " PTR_FORMAT ", age: %4d", |
12508
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
2007 |
HR_FORMAT_PARAMS(csr), |
30272
8cbe337a692c
8042891: Format issues embedded in macros for two g1 source files
stefank
parents:
30147
diff
changeset
|
2008 |
p2i(csr->prev_top_at_mark_start()), p2i(csr->next_top_at_mark_start()), |
12508
d76458352d62
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
12382
diff
changeset
|
2009 |
csr->age_in_surv_rate_group_cond()); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
2010 |
csr = next; |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
2011 |
} |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
2012 |
} |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
2013 |
#endif // !PRODUCT |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
2014 |
|
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
2015 |
double G1CollectorPolicy::reclaimable_bytes_perc(size_t reclaimable_bytes) const { |
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2016 |
// Returns the given amount of reclaimable bytes (that represents |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2017 |
// the amount of reclaimable space still to be collected) as a |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2018 |
// percentage of the current heap capacity. |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2019 |
size_t capacity_bytes = _g1->capacity(); |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2020 |
return (double) reclaimable_bytes * 100.0 / (double) capacity_bytes; |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2021 |
} |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2022 |
|
33810
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
2023 |
void G1CollectorPolicy::maybe_start_marking() { |
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
2024 |
if (need_to_start_conc_mark("end of GC")) { |
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
2025 |
// Note: this might have already been set, if during the last |
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
2026 |
// pause we decided to start a cycle but at the beginning of |
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
2027 |
// this pause we decided to postpone it. That's OK. |
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
2028 |
collector_state()->set_initiate_conc_mark_if_possible(true); |
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
2029 |
} |
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
2030 |
} |
8bbfb74d1f6c
8138740: Start initial mark right after mixed GC if needed
tschatzl
parents:
33809
diff
changeset
|
2031 |
|
34298
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2032 |
G1CollectorPolicy::PauseKind G1CollectorPolicy::young_gc_pause_kind() const { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2033 |
assert(!collector_state()->full_collection(), "must be"); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2034 |
if (collector_state()->during_initial_mark_pause()) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2035 |
assert(collector_state()->last_gc_was_young(), "must be"); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2036 |
assert(!collector_state()->last_young_gc(), "must be"); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2037 |
return InitialMarkGC; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2038 |
} else if (collector_state()->last_young_gc()) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2039 |
assert(!collector_state()->during_initial_mark_pause(), "must be"); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2040 |
assert(collector_state()->last_gc_was_young(), "must be"); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2041 |
return LastYoungGC; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2042 |
} else if (!collector_state()->last_gc_was_young()) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2043 |
assert(!collector_state()->during_initial_mark_pause(), "must be"); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2044 |
assert(!collector_state()->last_young_gc(), "must be"); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2045 |
return MixedGC; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2046 |
} else { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2047 |
assert(collector_state()->last_gc_was_young(), "must be"); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2048 |
assert(!collector_state()->during_initial_mark_pause(), "must be"); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2049 |
assert(!collector_state()->last_young_gc(), "must be"); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2050 |
return YoungOnlyGC; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2051 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2052 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2053 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2054 |
void G1CollectorPolicy::record_pause(PauseKind kind, double start, double end) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2055 |
// Manage the MMU tracker. For some reason it ignores Full GCs. |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2056 |
if (kind != FullGC) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2057 |
_mmu_tracker->add_pause(start, end); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2058 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2059 |
// Manage the mutator time tracking from initial mark to first mixed gc. |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2060 |
switch (kind) { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2061 |
case FullGC: |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2062 |
abort_time_to_mixed_tracking(); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2063 |
break; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2064 |
case Cleanup: |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2065 |
case Remark: |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2066 |
case YoungOnlyGC: |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2067 |
case LastYoungGC: |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2068 |
_initial_mark_to_mixed.add_pause(end - start); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2069 |
break; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2070 |
case InitialMarkGC: |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2071 |
_initial_mark_to_mixed.record_initial_mark_end(end); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2072 |
break; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2073 |
case MixedGC: |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2074 |
_initial_mark_to_mixed.record_mixed_gc_start(start); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2075 |
break; |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2076 |
default: |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2077 |
ShouldNotReachHere(); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2078 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2079 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2080 |
|
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2081 |
void G1CollectorPolicy::abort_time_to_mixed_tracking() { |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2082 |
_initial_mark_to_mixed.reset(); |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2083 |
} |
f3c9dcc5af96
8136681: Factor out IHOP calculation from G1CollectorPolicy
tschatzl
parents:
34134
diff
changeset
|
2084 |
|
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2085 |
bool G1CollectorPolicy::next_gc_should_be_mixed(const char* true_action_str, |
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
2086 |
const char* false_action_str) const { |
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
2087 |
if (cset_chooser()->is_empty()) { |
35061 | 2088 |
log_debug(gc, ergo)("%s (candidate old regions not available)", false_action_str); |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2089 |
return false; |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2090 |
} |
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2091 |
|
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2092 |
// Is the amount of uncollected reclaimable space above G1HeapWastePercent? |
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
2093 |
size_t reclaimable_bytes = cset_chooser()->remaining_reclaimable_bytes(); |
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2094 |
double reclaimable_perc = reclaimable_bytes_perc(reclaimable_bytes); |
12228
15ffdb8224fe
7146246: G1: expose some of the -XX flags that drive which old regions to collect during mixed GCs
tonyp
parents:
11756
diff
changeset
|
2095 |
double threshold = (double) G1HeapWastePercent; |
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2096 |
if (reclaimable_perc <= threshold) { |
35061 | 2097 |
log_debug(gc, ergo)("%s (reclaimable percentage not over threshold). candidate old regions: %u reclaimable: " SIZE_FORMAT " (%1.2f) threshold: " UINTX_FORMAT, |
2098 |
false_action_str, cset_chooser()->remaining_regions(), reclaimable_bytes, reclaimable_perc, G1HeapWastePercent); |
|
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2099 |
return false; |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2100 |
} |
35061 | 2101 |
log_debug(gc, ergo)("%s (candidate old regions available). candidate old regions: %u reclaimable: " SIZE_FORMAT " (%1.2f) threshold: " UINTX_FORMAT, |
2102 |
true_action_str, cset_chooser()->remaining_regions(), reclaimable_bytes, reclaimable_perc, G1HeapWastePercent); |
|
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2103 |
return true; |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2104 |
} |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2105 |
|
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
2106 |
uint G1CollectorPolicy::calc_min_old_cset_length() const { |
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2107 |
// The min old CSet region bound is based on the maximum desired |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2108 |
// number of mixed GCs after a cycle. I.e., even if some old regions |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2109 |
// look expensive, we should add them to the CSet anyway to make |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2110 |
// sure we go through the available old regions in no more than the |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2111 |
// maximum desired number of mixed GCs. |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2112 |
// |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2113 |
// The calculation is based on the number of marked regions we added |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2114 |
// to the CSet chooser in the first place, not how many remain, so |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2115 |
// that the result is the same during all mixed GCs that follow a cycle. |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2116 |
|
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
2117 |
const size_t region_num = (size_t) cset_chooser()->length(); |
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2118 |
const size_t gc_num = (size_t) MAX2(G1MixedGCCountTarget, (uintx) 1); |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2119 |
size_t result = region_num / gc_num; |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2120 |
// emulate ceiling |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2121 |
if (result * gc_num < region_num) { |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2122 |
result += 1; |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2123 |
} |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2124 |
return (uint) result; |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2125 |
} |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2126 |
|
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
2127 |
uint G1CollectorPolicy::calc_max_old_cset_length() const { |
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2128 |
// The max old CSet region bound is based on the threshold expressed |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2129 |
// as a percentage of the heap size. I.e., it should bound the |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2130 |
// number of old regions added to the CSet irrespective of how many |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2131 |
// of them are available. |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2132 |
|
33130
a776072941e8
8138969: G1CollectorPolicy should use const for applicable methods
ehelin
parents:
33107
diff
changeset
|
2133 |
const G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
26157
70eddb655686
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
25727
diff
changeset
|
2134 |
const size_t region_num = g1h->num_regions(); |
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2135 |
const size_t perc = (size_t) G1OldCSetRegionThresholdPercent; |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2136 |
size_t result = region_num * perc / 100; |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2137 |
// emulate ceiling |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2138 |
if (100 * result < region_num * perc) { |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2139 |
result += 1; |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2140 |
} |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2141 |
return (uint) result; |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2142 |
} |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2143 |
|
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2144 |
|
32744
3628aefe13d5
8135260: Split G1CollectorPolicy::finalize_cset into two parts
ehelin
parents:
32737
diff
changeset
|
2145 |
double G1CollectorPolicy::finalize_young_cset_part(double target_pause_time_ms) { |
13482 | 2146 |
double young_start_time_sec = os::elapsedTime(); |
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
2147 |
|
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2148 |
YoungList* young_list = _g1->young_list(); |
11395
33260c27554b
7119027: G1: use atomics to update RS length / predict time of inc CSet
tonyp
parents:
11249
diff
changeset
|
2149 |
finalize_incremental_cset_building(); |
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2150 |
|
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2151 |
guarantee(target_pause_time_ms > 0.0, |
33105
294e48b4f704
8080775: Better argument formatting for assert() and friends
david
parents:
32745
diff
changeset
|
2152 |
"target_pause_time_ms = %1.6lf should be positive", target_pause_time_ms); |
6058
9c9aec6ab47d
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
5891
diff
changeset
|
2153 |
guarantee(_collection_set == NULL, "Precondition"); |
1374 | 2154 |
|
2155 |
double base_time_ms = predict_base_elapsed_time_ms(_pending_cards); |
|
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2156 |
double time_remaining_ms = MAX2(target_pause_time_ms - base_time_ms, 0.0); |
1374 | 2157 |
|
35061 | 2158 |
log_trace(gc, ergo, cset)("Start choosing CSet. pending cards: " SIZE_FORMAT " predicted base time: %1.2fms remaining time: %1.2fms target pause time: %1.2fms", |
2159 |
_pending_cards, base_time_ms, time_remaining_ms, target_pause_time_ms); |
|
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2160 |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
2161 |
collector_state()->set_last_gc_was_young(collector_state()->gcs_are_young()); |
11249 | 2162 |
|
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2163 |
// The young list is laid with the survivor regions from the previous |
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2164 |
// pause are appended to the RHS of the young list, i.e. |
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2165 |
// [Newly Young Regions ++ Survivors from last pause]. |
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2166 |
|
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
2167 |
uint survivor_region_length = young_list->survivor_length(); |
29465
7c6ad4acdb78
8031538: G1 eden usage is sometimes higher than target eden (printed Eden size)
sfriberg
parents:
28832
diff
changeset
|
2168 |
uint eden_region_length = young_list->eden_length(); |
11169
0cfe4d79060c
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
10996
diff
changeset
|
2169 |
init_cset_region_lengths(eden_region_length, survivor_region_length); |
13482 | 2170 |
|
2171 |
HeapRegion* hr = young_list->first_survivor_region(); |
|
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2172 |
while (hr != NULL) { |
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2173 |
assert(hr->is_survivor(), "badly formed young list"); |
26696
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26157
diff
changeset
|
2174 |
// There is a convention that all the young regions in the CSet |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26157
diff
changeset
|
2175 |
// are tagged as "eden", so we do this for the survivors here. We |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26157
diff
changeset
|
2176 |
// use the special set_eden_pre_gc() as it doesn't check that the |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26157
diff
changeset
|
2177 |
// region is free (which is not the case here). |
623a25e6c686
8057768: Make heap region region type in G1 HeapRegion explicit
tonyp
parents:
26157
diff
changeset
|
2178 |
hr->set_eden_pre_gc(); |
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2179 |
hr = hr->get_next_young_region(); |
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2180 |
} |
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2181 |
|
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2182 |
// Clear the fields that point to the survivor list - they are all young now. |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2183 |
young_list->clear_survivors(); |
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2184 |
|
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2185 |
_collection_set = _inc_cset_head; |
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2186 |
_collection_set_bytes_used_before = _inc_cset_bytes_used_before; |
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2187 |
time_remaining_ms = MAX2(time_remaining_ms - _inc_cset_predicted_elapsed_time_ms, 0.0); |
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2188 |
|
35061 | 2189 |
log_trace(gc, ergo, cset)("Add young regions to CSet. eden: %u regions, survivors: %u regions, predicted young region time: %1.2fms, target pause time: %1.2fms", |
2190 |
eden_region_length, survivor_region_length, _inc_cset_predicted_elapsed_time_ms, target_pause_time_ms); |
|
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2191 |
|
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2192 |
// The number of recorded young regions is the incremental |
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2193 |
// collection set's current size |
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2194 |
set_recorded_rs_lengths(_inc_cset_recorded_rs_lengths); |
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2195 |
|
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2196 |
double young_end_time_sec = os::elapsedTime(); |
13516
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
2197 |
phase_times()->record_young_cset_choice_time_ms((young_end_time_sec - young_start_time_sec) * 1000.0); |
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2198 |
|
32744
3628aefe13d5
8135260: Split G1CollectorPolicy::finalize_cset into two parts
ehelin
parents:
32737
diff
changeset
|
2199 |
return time_remaining_ms; |
3628aefe13d5
8135260: Split G1CollectorPolicy::finalize_cset into two parts
ehelin
parents:
32737
diff
changeset
|
2200 |
} |
3628aefe13d5
8135260: Split G1CollectorPolicy::finalize_cset into two parts
ehelin
parents:
32737
diff
changeset
|
2201 |
|
3628aefe13d5
8135260: Split G1CollectorPolicy::finalize_cset into two parts
ehelin
parents:
32737
diff
changeset
|
2202 |
void G1CollectorPolicy::finalize_old_cset_part(double time_remaining_ms) { |
3628aefe13d5
8135260: Split G1CollectorPolicy::finalize_cset into two parts
ehelin
parents:
32737
diff
changeset
|
2203 |
double non_young_start_time_sec = os::elapsedTime(); |
3628aefe13d5
8135260: Split G1CollectorPolicy::finalize_cset into two parts
ehelin
parents:
32737
diff
changeset
|
2204 |
double predicted_old_time_ms = 0.0; |
3628aefe13d5
8135260: Split G1CollectorPolicy::finalize_cset into two parts
ehelin
parents:
32737
diff
changeset
|
2205 |
|
10280
3463715b5ef7
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
10243
diff
changeset
|
2206 |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
2207 |
if (!collector_state()->gcs_are_young()) { |
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
2208 |
cset_chooser()->verify(); |
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2209 |
const uint min_old_cset_length = calc_min_old_cset_length(); |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2210 |
const uint max_old_cset_length = calc_max_old_cset_length(); |
12381
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
2211 |
|
1438e0fbfa27
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
12378
diff
changeset
|
2212 |
uint expensive_region_num = 0; |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2213 |
bool check_time_remaining = adaptive_young_list_length(); |
13482 | 2214 |
|
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
2215 |
HeapRegion* hr = cset_chooser()->peek(); |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2216 |
while (hr != NULL) { |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2217 |
if (old_cset_region_length() >= max_old_cset_length) { |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2218 |
// Added maximum number of old regions to the CSet. |
35061 | 2219 |
log_debug(gc, ergo, cset)("Finish adding old regions to CSet (old CSet region num reached max). old %u regions, max %u regions", |
2220 |
old_cset_region_length(), max_old_cset_length); |
|
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2221 |
break; |
1374 | 2222 |
} |
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2223 |
|
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2224 |
|
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2225 |
// Stop adding regions if the remaining reclaimable space is |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2226 |
// not above G1HeapWastePercent. |
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
2227 |
size_t reclaimable_bytes = cset_chooser()->remaining_reclaimable_bytes(); |
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2228 |
double reclaimable_perc = reclaimable_bytes_perc(reclaimable_bytes); |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2229 |
double threshold = (double) G1HeapWastePercent; |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2230 |
if (reclaimable_perc <= threshold) { |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2231 |
// We've added enough old regions that the amount of uncollected |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2232 |
// reclaimable space is at or below the waste threshold. Stop |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2233 |
// adding old regions to the CSet. |
35061 | 2234 |
log_debug(gc, ergo, cset)("Finish adding old regions to CSet (reclaimable percentage not over threshold). " |
2235 |
"old %u regions, max %u regions, reclaimable: " SIZE_FORMAT "B (%1.2f%%) threshold: " UINTX_FORMAT "%%", |
|
2236 |
old_cset_region_length(), max_old_cset_length, reclaimable_bytes, reclaimable_perc, G1HeapWastePercent); |
|
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2237 |
break; |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2238 |
} |
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2239 |
|
31331
a7c714b6cfb3
7097567: G1: abstract and encapsulate collector phases and transitions between them
drwhite
parents:
30874
diff
changeset
|
2240 |
double predicted_time_ms = predict_region_elapsed_time_ms(hr, collector_state()->gcs_are_young()); |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2241 |
if (check_time_remaining) { |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2242 |
if (predicted_time_ms > time_remaining_ms) { |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2243 |
// Too expensive for the current CSet. |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2244 |
|
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2245 |
if (old_cset_region_length() >= min_old_cset_length) { |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2246 |
// We have added the minimum number of old regions to the CSet, |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2247 |
// we are done with this CSet. |
35061 | 2248 |
log_debug(gc, ergo, cset)("Finish adding old regions to CSet (predicted time is too high). " |
2249 |
"predicted time: %1.2fms, remaining time: %1.2fms old %u regions, min %u regions", |
|
2250 |
predicted_time_ms, time_remaining_ms, old_cset_region_length(), min_old_cset_length); |
|
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2251 |
break; |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2252 |
} |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2253 |
|
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2254 |
// We'll add it anyway given that we haven't reached the |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2255 |
// minimum number of old regions. |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2256 |
expensive_region_num += 1; |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2257 |
} |
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2258 |
} else { |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2259 |
if (old_cset_region_length() >= min_old_cset_length) { |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2260 |
// In the non-auto-tuning case, we'll finish adding regions |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2261 |
// to the CSet if we reach the minimum. |
35061 | 2262 |
|
2263 |
log_debug(gc, ergo, cset)("Finish adding old regions to CSet (old CSet region num reached min). old %u regions, min %u regions", |
|
2264 |
old_cset_region_length(), min_old_cset_length); |
|
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2265 |
break; |
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2266 |
} |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2267 |
} |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2268 |
|
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2269 |
// We will add this region to the CSet. |
15861
974c3ccaa5d2
8007036: G1: Too many old regions added to last mixed GC
johnc
parents:
15806
diff
changeset
|
2270 |
time_remaining_ms = MAX2(time_remaining_ms - predicted_time_ms, 0.0); |
32744
3628aefe13d5
8135260: Split G1CollectorPolicy::finalize_cset into two parts
ehelin
parents:
32737
diff
changeset
|
2271 |
predicted_old_time_ms += predicted_time_ms; |
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
2272 |
cset_chooser()->pop(); // already have region via peek() |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2273 |
_g1->old_set_remove(hr); |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2274 |
add_old_region_to_cset(hr); |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2275 |
|
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
2276 |
hr = cset_chooser()->peek(); |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2277 |
} |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2278 |
if (hr == NULL) { |
35061 | 2279 |
log_debug(gc, ergo, cset)("Finish adding old regions to CSet (candidate old regions not available)"); |
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2280 |
} |
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2281 |
|
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2282 |
if (expensive_region_num > 0) { |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2283 |
// We print the information once here at the end, predicated on |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2284 |
// whether we added any apparently expensive regions or not, to |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2285 |
// avoid generating output per region. |
35061 | 2286 |
log_debug(gc, ergo, cset)("Added expensive regions to CSet (old CSet region num not reached min)." |
35887 | 2287 |
"old: %u regions, expensive: %u regions, min: %u regions, remaining time: %1.2fms", |
35061 | 2288 |
old_cset_region_length(), expensive_region_num, min_old_cset_length, time_remaining_ms); |
11756
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2289 |
} |
28b6fe22e43d
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
11584
diff
changeset
|
2290 |
|
34611
b8f6f834489b
8144077: Add getter for G1CollectorPolicy::_collectionSetChooser
ehelin
parents:
34300
diff
changeset
|
2291 |
cset_chooser()->verify(); |
1374 | 2292 |
} |
2293 |
||
5350
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
2294 |
stop_incremental_cset_building(); |
cccf0925702e
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
5347
diff
changeset
|
2295 |
|
35887 | 2296 |
log_debug(gc, ergo, cset)("Finish choosing CSet. old: %u regions, predicted old region time: %1.2fms, time remaining: %1.2f", |
35061 | 2297 |
old_cset_region_length(), predicted_old_time_ms, time_remaining_ms); |
10523
cdb54c167ab0
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
10281
diff
changeset
|
2298 |
|
1374 | 2299 |
double non_young_end_time_sec = os::elapsedTime(); |
13516
f7adc27fb367
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
13482
diff
changeset
|
2300 |
phase_times()->record_non_young_cset_choice_time_ms((non_young_end_time_sec - non_young_start_time_sec) * 1000.0); |
1374 | 2301 |
} |