Mercurial > hg > truffle
view src/share/vm/gc_implementation/g1/g1MonitoringSupport.cpp @ 3456:782e2bb60c41
7052494: Eclipse test fails on JDK 7 b142
Summary: Keep 'ne' test in Counted loop when we can't guarantee during compilation that init < limit.
Reviewed-by: never
author | kvn |
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date | Mon, 20 Jun 2011 16:45:35 -0700 |
parents | b52782ae3880 |
children | 8229bd737950 |
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/* * Copyright (c) 2011, 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" G1MonitoringSupport::G1MonitoringSupport(G1CollectedHeap* g1h, VirtualSpace* g1_storage_addr) : _g1h(g1h), _incremental_collection_counters(NULL), _full_collection_counters(NULL), _non_young_collection_counters(NULL), _old_space_counters(NULL), _young_collection_counters(NULL), _eden_counters(NULL), _from_counters(NULL), _to_counters(NULL), _g1_storage_addr(g1_storage_addr) { // 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 _non_young_collection_counters = new GenerationCounters("whole heap", 1, 1, _g1_storage_addr); // name "generation.1.space.0" // Counters are created from maxCapacity, capacity, initCapacity, // and used. _old_space_counters = new HSpaceCounters("space", 0, _g1h->max_capacity(), _g1h->capacity(), _non_young_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 _non_young_collection_counters for additional counters _young_collection_counters = new GenerationCounters("young", 0, 3, NULL); // Replace "max_heap_byte_size() with maximum young gen size for // g1Collectedheap // name "generation.0.space.0" // See _old_space_counters for additional counters _eden_counters = new HSpaceCounters("eden", 0, _g1h->max_capacity(), eden_space_committed(), _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, (long) 0, (long) 0, _young_collection_counters); // name "generation.0.space.2" // See _old_space_counters for additional counters _to_counters = new HSpaceCounters("s1", 2, _g1h->max_capacity(), survivor_space_committed(), _young_collection_counters); } size_t G1MonitoringSupport::overall_committed() { return g1h()->capacity(); } size_t G1MonitoringSupport::overall_used() { return g1h()->used_unlocked(); } size_t G1MonitoringSupport::eden_space_committed() { return MAX2(eden_space_used(), (size_t) HeapRegion::GrainBytes); } size_t G1MonitoringSupport::eden_space_used() { size_t young_list_length = g1h()->young_list()->length(); size_t eden_used = young_list_length * HeapRegion::GrainBytes; size_t survivor_used = survivor_space_used(); eden_used = subtract_up_to_zero(eden_used, survivor_used); return eden_used; } size_t G1MonitoringSupport::survivor_space_committed() { return MAX2(survivor_space_used(), (size_t) HeapRegion::GrainBytes); } size_t G1MonitoringSupport::survivor_space_used() { size_t survivor_num = g1h()->g1_policy()->recorded_survivor_regions(); size_t survivor_used = survivor_num * HeapRegion::GrainBytes; return survivor_used; } size_t G1MonitoringSupport::old_space_committed() { size_t committed = overall_committed(); size_t eden_committed = eden_space_committed(); size_t survivor_committed = survivor_space_committed(); committed = subtract_up_to_zero(committed, eden_committed); committed = subtract_up_to_zero(committed, survivor_committed); committed = MAX2(committed, (size_t) HeapRegion::GrainBytes); return committed; } // See the comment near the top of g1MonitoringSupport.hpp for // an explanation of these calculations for "used" and "capacity". size_t G1MonitoringSupport::old_space_used() { size_t used = overall_used(); size_t eden_used = eden_space_used(); size_t survivor_used = survivor_space_used(); used = subtract_up_to_zero(used, eden_used); used = subtract_up_to_zero(used, survivor_used); return used; } void G1MonitoringSupport::update_counters() { if (UsePerfData) { eden_counters()->update_capacity(eden_space_committed()); eden_counters()->update_used(eden_space_used()); to_counters()->update_capacity(survivor_space_committed()); to_counters()->update_used(survivor_space_used()); old_space_counters()->update_capacity(old_space_committed()); old_space_counters()->update_used(old_space_used()); non_young_collection_counters()->update_all(); } } void G1MonitoringSupport::update_eden_counters() { if (UsePerfData) { eden_counters()->update_capacity(eden_space_committed()); eden_counters()->update_used(eden_space_used()); } }