Mercurial > hg > truffle
view src/share/vm/gc_implementation/g1/g1MonitoringSupport.cpp @ 10388:320b4e0f0892
8015585: Missing regression test for 8011771
Summary: missing regression test
Reviewed-by: kvn
author | roland |
---|---|
date | Thu, 30 May 2013 11:21:01 +0200 |
parents | da91efe96a93 |
children | 1a8fb39bdbc4 |
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/* * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "gc_implementation/g1/g1MonitoringSupport.hpp" #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" #include "gc_implementation/g1/g1CollectorPolicy.hpp" G1GenerationCounters::G1GenerationCounters(G1MonitoringSupport* g1mm, const char* name, int ordinal, int spaces, size_t min_capacity, size_t max_capacity, size_t curr_capacity) : GenerationCounters(name, ordinal, spaces, min_capacity, max_capacity, curr_capacity), _g1mm(g1mm) { } // We pad the capacity three times given that the young generation // contains three spaces (eden and two survivors). G1YoungGenerationCounters::G1YoungGenerationCounters(G1MonitoringSupport* g1mm, const char* name) : G1GenerationCounters(g1mm, name, 0 /* ordinal */, 3 /* spaces */, G1MonitoringSupport::pad_capacity(0, 3) /* min_capacity */, G1MonitoringSupport::pad_capacity(g1mm->young_gen_max(), 3), G1MonitoringSupport::pad_capacity(0, 3) /* curr_capacity */) { if (UsePerfData) { update_all(); } } G1OldGenerationCounters::G1OldGenerationCounters(G1MonitoringSupport* g1mm, const char* name) : G1GenerationCounters(g1mm, name, 1 /* ordinal */, 1 /* spaces */, G1MonitoringSupport::pad_capacity(0) /* min_capacity */, G1MonitoringSupport::pad_capacity(g1mm->old_gen_max()), G1MonitoringSupport::pad_capacity(0) /* curr_capacity */) { if (UsePerfData) { update_all(); } } void G1YoungGenerationCounters::update_all() { size_t committed = G1MonitoringSupport::pad_capacity(_g1mm->young_gen_committed(), 3); _current_size->set_value(committed); } void G1OldGenerationCounters::update_all() { size_t committed = G1MonitoringSupport::pad_capacity(_g1mm->old_gen_committed()); _current_size->set_value(committed); } G1MonitoringSupport::G1MonitoringSupport(G1CollectedHeap* g1h) : _g1h(g1h), _incremental_collection_counters(NULL), _full_collection_counters(NULL), _old_collection_counters(NULL), _old_space_counters(NULL), _young_collection_counters(NULL), _eden_counters(NULL), _from_counters(NULL), _to_counters(NULL), _overall_reserved(0), _overall_committed(0), _overall_used(0), _young_region_num(0), _young_gen_committed(0), _eden_committed(0), _eden_used(0), _survivor_committed(0), _survivor_used(0), _old_committed(0), _old_used(0) { _overall_reserved = g1h->max_capacity(); recalculate_sizes(); // Counters for GC collections // // name "collector.0". In a generational collector this would be the // young generation collection. _incremental_collection_counters = new CollectorCounters("G1 incremental collections", 0); // name "collector.1". In a generational collector this would be the // old generation collection. _full_collection_counters = new CollectorCounters("G1 stop-the-world full collections", 1); // timer sampling for all counters supporting sampling only update the // used value. See the take_sample() method. G1 requires both used and // capacity updated so sampling is not currently used. It might // be sufficient to update all counters in take_sample() even though // take_sample() only returns "used". When sampling was used, there // were some anomolous values emitted which may have been the consequence // of not updating all values simultaneously (i.e., see the calculation done // in eden_space_used(), is it possbile that the values used to // calculate either eden_used or survivor_used are being updated by // the collector when the sample is being done?). const bool sampled = false; // "Generation" and "Space" counters. // // name "generation.1" This is logically the old generation in // generational GC terms. The "1, 1" parameters are for // the n-th generation (=1) with 1 space. // Counters are created from minCapacity, maxCapacity, and capacity _old_collection_counters = new G1OldGenerationCounters(this, "old"); // name "generation.1.space.0" // Counters are created from maxCapacity, capacity, initCapacity, // and used. _old_space_counters = new HSpaceCounters("space", 0 /* ordinal */, pad_capacity(overall_reserved()) /* max_capacity */, pad_capacity(old_space_committed()) /* init_capacity */, _old_collection_counters); // Young collection set // name "generation.0". This is logically the young generation. // The "0, 3" are paremeters for the n-th genertaion (=0) with 3 spaces. // See _old_collection_counters for additional counters _young_collection_counters = new G1YoungGenerationCounters(this, "young"); // name "generation.0.space.0" // See _old_space_counters for additional counters _eden_counters = new HSpaceCounters("eden", 0 /* ordinal */, pad_capacity(overall_reserved()) /* max_capacity */, pad_capacity(eden_space_committed()) /* init_capacity */, _young_collection_counters); // name "generation.0.space.1" // See _old_space_counters for additional counters // Set the arguments to indicate that this survivor space is not used. _from_counters = new HSpaceCounters("s0", 1 /* ordinal */, pad_capacity(0) /* max_capacity */, pad_capacity(0) /* init_capacity */, _young_collection_counters); // name "generation.0.space.2" // See _old_space_counters for additional counters _to_counters = new HSpaceCounters("s1", 2 /* ordinal */, pad_capacity(overall_reserved()) /* max_capacity */, pad_capacity(survivor_space_committed()) /* init_capacity */, _young_collection_counters); if (UsePerfData) { // Given that this survivor space is not used, we update it here // once to reflect that its used space is 0 so that we don't have to // worry about updating it again later. _from_counters->update_used(0); } } void G1MonitoringSupport::recalculate_sizes() { G1CollectedHeap* g1 = g1h(); // Recalculate all the sizes from scratch. We assume that this is // called at a point where no concurrent updates to the various // values we read here are possible (i.e., at a STW phase at the end // of a GC). uint young_list_length = g1->young_list()->length(); uint survivor_list_length = g1->g1_policy()->recorded_survivor_regions(); assert(young_list_length >= survivor_list_length, "invariant"); uint eden_list_length = young_list_length - survivor_list_length; // Max length includes any potential extensions to the young gen // we'll do when the GC locker is active. uint young_list_max_length = g1->g1_policy()->young_list_max_length(); assert(young_list_max_length >= survivor_list_length, "invariant"); uint eden_list_max_length = young_list_max_length - survivor_list_length; _overall_used = g1->used_unlocked(); _eden_used = (size_t) eden_list_length * HeapRegion::GrainBytes; _survivor_used = (size_t) survivor_list_length * HeapRegion::GrainBytes; _young_region_num = young_list_length; _old_used = subtract_up_to_zero(_overall_used, _eden_used + _survivor_used); // First calculate the committed sizes that can be calculated independently. _survivor_committed = _survivor_used; _old_committed = HeapRegion::align_up_to_region_byte_size(_old_used); // Next, start with the overall committed size. _overall_committed = g1->capacity(); size_t committed = _overall_committed; // Remove the committed size we have calculated so far (for the // survivor and old space). assert(committed >= (_survivor_committed + _old_committed), "sanity"); committed -= _survivor_committed + _old_committed; // Next, calculate and remove the committed size for the eden. _eden_committed = (size_t) eden_list_max_length * HeapRegion::GrainBytes; // Somewhat defensive: be robust in case there are inaccuracies in // the calculations _eden_committed = MIN2(_eden_committed, committed); committed -= _eden_committed; // Finally, give the rest to the old space... _old_committed += committed; // ..and calculate the young gen committed. _young_gen_committed = _eden_committed + _survivor_committed; assert(_overall_committed == (_eden_committed + _survivor_committed + _old_committed), "the committed sizes should add up"); // Somewhat defensive: cap the eden used size to make sure it // never exceeds the committed size. _eden_used = MIN2(_eden_used, _eden_committed); // _survivor_committed and _old_committed are calculated in terms of // the corresponding _*_used value, so the next two conditions // should hold. assert(_survivor_used <= _survivor_committed, "post-condition"); assert(_old_used <= _old_committed, "post-condition"); } void G1MonitoringSupport::recalculate_eden_size() { G1CollectedHeap* g1 = g1h(); // When a new eden region is allocated, only the eden_used size is // affected (since we have recalculated everything else at the last GC). uint young_region_num = g1h()->young_list()->length(); if (young_region_num > _young_region_num) { uint diff = young_region_num - _young_region_num; _eden_used += (size_t) diff * HeapRegion::GrainBytes; // Somewhat defensive: cap the eden used size to make sure it // never exceeds the committed size. _eden_used = MIN2(_eden_used, _eden_committed); _young_region_num = young_region_num; } } void G1MonitoringSupport::update_sizes() { recalculate_sizes(); if (UsePerfData) { eden_counters()->update_capacity(pad_capacity(eden_space_committed())); eden_counters()->update_used(eden_space_used()); // only the to survivor space (s1) is active, so we don't need to // update the counteres for the from survivor space (s0) to_counters()->update_capacity(pad_capacity(survivor_space_committed())); to_counters()->update_used(survivor_space_used()); old_space_counters()->update_capacity(pad_capacity(old_space_committed())); old_space_counters()->update_used(old_space_used()); old_collection_counters()->update_all(); young_collection_counters()->update_all(); MetaspaceCounters::update_performance_counters(); } } void G1MonitoringSupport::update_eden_size() { recalculate_eden_size(); if (UsePerfData) { eden_counters()->update_used(eden_space_used()); } }