jmasa@2821: /*
jmasa@2821:  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
jmasa@2821:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jmasa@2821:  *
jmasa@2821:  * This code is free software; you can redistribute it and/or modify it
jmasa@2821:  * under the terms of the GNU General Public License version 2 only, as
jmasa@2821:  * published by the Free Software Foundation.
jmasa@2821:  *
jmasa@2821:  * This code is distributed in the hope that it will be useful, but WITHOUT
jmasa@2821:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jmasa@2821:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jmasa@2821:  * version 2 for more details (a copy is included in the LICENSE file that
jmasa@2821:  * accompanied this code).
jmasa@2821:  *
jmasa@2821:  * You should have received a copy of the GNU General Public License version
jmasa@2821:  * 2 along with this work; if not, write to the Free Software Foundation,
jmasa@2821:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jmasa@2821:  *
jmasa@2821:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
jmasa@2821:  * or visit www.oracle.com if you need additional information or have any
jmasa@2821:  * questions.
jmasa@2821:  *
jmasa@2821:  */
jmasa@2821: 
jmasa@2821: #include "precompiled.hpp"
jmasa@2821: #include "gc_implementation/g1/g1MonitoringSupport.hpp"
jmasa@2821: #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
jmasa@2821: #include "gc_implementation/g1/g1CollectorPolicy.hpp"
jmasa@2821: 
jmasa@2821: G1MonitoringSupport::G1MonitoringSupport(G1CollectedHeap* g1h,
jmasa@2821:                                          VirtualSpace* g1_storage_addr) :
jmasa@2821:   _g1h(g1h),
jmasa@2821:   _incremental_collection_counters(NULL),
jmasa@2821:   _full_collection_counters(NULL),
jmasa@2821:   _non_young_collection_counters(NULL),
jmasa@2821:   _old_space_counters(NULL),
jmasa@2821:   _young_collection_counters(NULL),
jmasa@2821:   _eden_counters(NULL),
jmasa@2821:   _from_counters(NULL),
jmasa@2821:   _to_counters(NULL),
jmasa@2821:   _g1_storage_addr(g1_storage_addr)
jmasa@2821: {
jmasa@2821:   // Counters for GC collections
jmasa@2821:   //
jmasa@2821:   //  name "collector.0".  In a generational collector this would be the
jmasa@2821:   // young generation collection.
jmasa@2821:   _incremental_collection_counters =
jmasa@2821:     new CollectorCounters("G1 incremental collections", 0);
jmasa@2821:   //   name "collector.1".  In a generational collector this would be the
jmasa@2821:   // old generation collection.
jmasa@2821:   _full_collection_counters =
jmasa@2821:     new CollectorCounters("G1 stop-the-world full collections", 1);
jmasa@2821: 
jmasa@2821:   // timer sampling for all counters supporting sampling only update the
jmasa@2821:   // used value.  See the take_sample() method.  G1 requires both used and
jmasa@2821:   // capacity updated so sampling is not currently used.  It might
jmasa@2821:   // be sufficient to update all counters in take_sample() even though
jmasa@2821:   // take_sample() only returns "used".  When sampling was used, there
jmasa@2821:   // were some anomolous values emitted which may have been the consequence
jmasa@2821:   // of not updating all values simultaneously (i.e., see the calculation done
jmasa@2821:   // in eden_space_used(), is it possbile that the values used to
jmasa@2821:   // calculate either eden_used or survivor_used are being updated by
jmasa@2821:   // the collector when the sample is being done?).
jmasa@2821:   const bool sampled = false;
jmasa@2821: 
jmasa@2821:   // "Generation" and "Space" counters.
jmasa@2821:   //
jmasa@2821:   //  name "generation.1" This is logically the old generation in
jmasa@2821:   // generational GC terms.  The "1, 1" parameters are for
jmasa@2821:   // the n-th generation (=1) with 1 space.
jmasa@2821:   // Counters are created from minCapacity, maxCapacity, and capacity
jmasa@2821:   _non_young_collection_counters =
jmasa@2821:     new GenerationCounters("whole heap", 1, 1, _g1_storage_addr);
jmasa@2821: 
jmasa@2821:   //  name  "generation.1.space.0"
jmasa@2821:   // Counters are created from maxCapacity, capacity, initCapacity,
jmasa@2821:   // and used.
jmasa@2821:   _old_space_counters = new HSpaceCounters("space", 0,
jmasa@2821:     _g1h->max_capacity(), _g1h->capacity(), _non_young_collection_counters);
jmasa@2821: 
jmasa@2821:   //   Young collection set
jmasa@2821:   //  name "generation.0".  This is logically the young generation.
jmasa@2821:   //  The "0, 3" are paremeters for the n-th genertaion (=0) with 3 spaces.
jmasa@2821:   // See  _non_young_collection_counters for additional counters
jmasa@2821:   _young_collection_counters = new GenerationCounters("young", 0, 3, NULL);
jmasa@2821: 
jmasa@2821:   // Replace "max_heap_byte_size() with maximum young gen size for
jmasa@2821:   // g1Collectedheap
jmasa@2821:   //  name "generation.0.space.0"
jmasa@2821:   // See _old_space_counters for additional counters
jmasa@2821:   _eden_counters = new HSpaceCounters("eden", 0,
jmasa@2821:     _g1h->max_capacity(), eden_space_committed(),
jmasa@2821:     _young_collection_counters);
jmasa@2821: 
jmasa@2821:   //  name "generation.0.space.1"
jmasa@2821:   // See _old_space_counters for additional counters
jmasa@2821:   // Set the arguments to indicate that this survivor space is not used.
jmasa@2821:   _from_counters = new HSpaceCounters("s0", 1, (long) 0, (long) 0,
jmasa@2821:     _young_collection_counters);
jmasa@2821: 
jmasa@2821:   //  name "generation.0.space.2"
jmasa@2821:   // See _old_space_counters for additional counters
jmasa@2821:   _to_counters = new HSpaceCounters("s1", 2,
jmasa@2821:     _g1h->max_capacity(),
jmasa@2821:     survivor_space_committed(),
jmasa@2821:     _young_collection_counters);
jmasa@2821: }
jmasa@2821: 
jmasa@2821: size_t G1MonitoringSupport::overall_committed() {
jmasa@2821:   return g1h()->capacity();
jmasa@2821: }
jmasa@2821: 
jmasa@2821: size_t G1MonitoringSupport::overall_used() {
jmasa@2821:   return g1h()->used_unlocked();
jmasa@2821: }
jmasa@2821: 
jmasa@2821: size_t G1MonitoringSupport::eden_space_committed() {
jmasa@2821:   return MAX2(eden_space_used(), (size_t) HeapRegion::GrainBytes);
jmasa@2821: }
jmasa@2821: 
jmasa@2821: size_t G1MonitoringSupport::eden_space_used() {
jmasa@2821:   size_t young_list_length = g1h()->young_list()->length();
jmasa@2821:   size_t eden_used = young_list_length * HeapRegion::GrainBytes;
jmasa@2821:   size_t survivor_used = survivor_space_used();
jmasa@2821:   eden_used = subtract_up_to_zero(eden_used, survivor_used);
jmasa@2821:   return eden_used;
jmasa@2821: }
jmasa@2821: 
jmasa@2821: size_t G1MonitoringSupport::survivor_space_committed() {
jmasa@2821:   return MAX2(survivor_space_used(),
jmasa@2821:               (size_t) HeapRegion::GrainBytes);
jmasa@2821: }
jmasa@2821: 
jmasa@2821: size_t G1MonitoringSupport::survivor_space_used() {
jmasa@2821:   size_t survivor_num = g1h()->g1_policy()->recorded_survivor_regions();
jmasa@2821:   size_t survivor_used = survivor_num * HeapRegion::GrainBytes;
jmasa@2821:   return survivor_used;
jmasa@2821: }
jmasa@2821: 
jmasa@2821: size_t G1MonitoringSupport::old_space_committed() {
jmasa@2821:   size_t committed = overall_committed();
jmasa@2821:   size_t eden_committed = eden_space_committed();
jmasa@2821:   size_t survivor_committed = survivor_space_committed();
jmasa@2821:   committed = subtract_up_to_zero(committed, eden_committed);
jmasa@2821:   committed = subtract_up_to_zero(committed, survivor_committed);
jmasa@2821:   committed = MAX2(committed, (size_t) HeapRegion::GrainBytes);
jmasa@2821:   return committed;
jmasa@2821: }
jmasa@2821: 
jmasa@2821: // See the comment near the top of g1MonitoringSupport.hpp for
jmasa@2821: // an explanation of these calculations for "used" and "capacity".
jmasa@2821: size_t G1MonitoringSupport::old_space_used() {
jmasa@2821:   size_t used = overall_used();
jmasa@2821:   size_t eden_used = eden_space_used();
jmasa@2821:   size_t survivor_used = survivor_space_used();
jmasa@2821:   used = subtract_up_to_zero(used, eden_used);
jmasa@2821:   used = subtract_up_to_zero(used, survivor_used);
jmasa@2821:   return used;
jmasa@2821: }
jmasa@2821: 
jmasa@2821: void G1MonitoringSupport::update_counters() {
jmasa@2821:   if (UsePerfData) {
jmasa@2821:     eden_counters()->update_capacity(eden_space_committed());
jmasa@2821:     eden_counters()->update_used(eden_space_used());
jmasa@2821:     to_counters()->update_capacity(survivor_space_committed());
jmasa@2821:     to_counters()->update_used(survivor_space_used());
jmasa@2821:     old_space_counters()->update_capacity(old_space_committed());
jmasa@2821:     old_space_counters()->update_used(old_space_used());
jmasa@2821:     non_young_collection_counters()->update_all();
jmasa@2821:   }
jmasa@2821: }
jmasa@2821: 
jmasa@2821: void G1MonitoringSupport::update_eden_counters() {
jmasa@2821:   if (UsePerfData) {
jmasa@2821:     eden_counters()->update_capacity(eden_space_committed());
jmasa@2821:     eden_counters()->update_used(eden_space_used());
jmasa@2821:   }
jmasa@2821: }