/* * Copyright (c) 2016, 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/g1/g1CollectedHeap.hpp" #include "gc/g1/g1HeapTransition.hpp" #include "gc/g1/g1Policy.hpp" #include "logging/log.hpp" #include "memory/metaspace.hpp" G1HeapTransition::Data::Data(G1CollectedHeap* g1_heap) { _eden_length = g1_heap->eden_regions_count(); _survivor_length = g1_heap->survivor_regions_count(); _old_length = g1_heap->old_regions_count(); _humongous_length = g1_heap->humongous_regions_count(); _metaspace_used_bytes = MetaspaceAux::used_bytes(); } G1HeapTransition::G1HeapTransition(G1CollectedHeap* g1_heap) : _g1_heap(g1_heap), _before(g1_heap) { } struct DetailedUsage : public StackObj { size_t _eden_used; size_t _survivor_used; size_t _old_used; size_t _humongous_used; size_t _eden_region_count; size_t _survivor_region_count; size_t _old_region_count; size_t _humongous_region_count; DetailedUsage() : _eden_used(0), _survivor_used(0), _old_used(0), _humongous_used(0), _eden_region_count(0), _survivor_region_count(0), _old_region_count(0), _humongous_region_count(0) {} }; class DetailedUsageClosure: public HeapRegionClosure { public: DetailedUsage _usage; bool do_heap_region(HeapRegion* r) { if (r->is_old()) { _usage._old_used += r->used(); _usage._old_region_count++; } else if (r->is_survivor()) { _usage._survivor_used += r->used(); _usage._survivor_region_count++; } else if (r->is_eden()) { _usage._eden_used += r->used(); _usage._eden_region_count++; } else if (r->is_humongous()) { _usage._humongous_used += r->used(); _usage._humongous_region_count++; } else { assert(r->used() == 0, "Expected used to be 0 but it was " SIZE_FORMAT, r->used()); } return false; } }; void G1HeapTransition::print() { Data after(_g1_heap); size_t eden_capacity_length_after_gc = _g1_heap->g1_policy()->young_list_target_length() - after._survivor_length; size_t survivor_capacity_length_after_gc = _g1_heap->g1_policy()->max_survivor_regions(); DetailedUsage usage; if (log_is_enabled(Trace, gc, heap)) { DetailedUsageClosure blk; _g1_heap->heap_region_iterate(&blk); usage = blk._usage; assert(usage._eden_region_count == 0, "Expected no eden regions, but got " SIZE_FORMAT, usage._eden_region_count); assert(usage._survivor_region_count == after._survivor_length, "Expected survivors to be " SIZE_FORMAT " but was " SIZE_FORMAT, after._survivor_length, usage._survivor_region_count); assert(usage._old_region_count == after._old_length, "Expected old to be " SIZE_FORMAT " but was " SIZE_FORMAT, after._old_length, usage._old_region_count); assert(usage._humongous_region_count == after._humongous_length, "Expected humongous to be " SIZE_FORMAT " but was " SIZE_FORMAT, after._humongous_length, usage._humongous_region_count); } log_info(gc, heap)("Eden regions: " SIZE_FORMAT "->" SIZE_FORMAT "(" SIZE_FORMAT ")", _before._eden_length, after._eden_length, eden_capacity_length_after_gc); log_trace(gc, heap)(" Used: 0K, Waste: 0K"); log_info(gc, heap)("Survivor regions: " SIZE_FORMAT "->" SIZE_FORMAT "(" SIZE_FORMAT ")", _before._survivor_length, after._survivor_length, survivor_capacity_length_after_gc); log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K", usage._survivor_used / K, ((after._survivor_length * HeapRegion::GrainBytes) - usage._survivor_used) / K); log_info(gc, heap)("Old regions: " SIZE_FORMAT "->" SIZE_FORMAT, _before._old_length, after._old_length); log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K", usage._old_used / K, ((after._old_length * HeapRegion::GrainBytes) - usage._old_used) / K); log_info(gc, heap)("Humongous regions: " SIZE_FORMAT "->" SIZE_FORMAT, _before._humongous_length, after._humongous_length); log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K", usage._humongous_used / K, ((after._humongous_length * HeapRegion::GrainBytes) - usage._humongous_used) / K); MetaspaceAux::print_metaspace_change(_before._metaspace_used_bytes); }