jmasa@2821: /*
mikael@6198:  * Copyright (c) 2011, 2013, 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: 
tonyp@3176: G1GenerationCounters::G1GenerationCounters(G1MonitoringSupport* g1mm,
tonyp@3176:                                            const char* name,
tonyp@3176:                                            int ordinal, int spaces,
tonyp@3176:                                            size_t min_capacity,
tonyp@3176:                                            size_t max_capacity,
tonyp@3176:                                            size_t curr_capacity)
tonyp@3176:   : GenerationCounters(name, ordinal, spaces, min_capacity,
tonyp@3176:                        max_capacity, curr_capacity), _g1mm(g1mm) { }
tonyp@3176: 
tonyp@3176: // We pad the capacity three times given that the young generation
tonyp@3176: // contains three spaces (eden and two survivors).
tonyp@3176: G1YoungGenerationCounters::G1YoungGenerationCounters(G1MonitoringSupport* g1mm,
tonyp@3176:                                                      const char* name)
tonyp@3176:   : G1GenerationCounters(g1mm, name, 0 /* ordinal */, 3 /* spaces */,
tonyp@3176:                G1MonitoringSupport::pad_capacity(0, 3) /* min_capacity */,
tonyp@3176:                G1MonitoringSupport::pad_capacity(g1mm->young_gen_max(), 3),
tonyp@3176:                G1MonitoringSupport::pad_capacity(0, 3) /* curr_capacity */) {
johnc@3620:   if (UsePerfData) {
johnc@3620:     update_all();
johnc@3620:   }
tonyp@3176: }
tonyp@3176: 
tonyp@3176: G1OldGenerationCounters::G1OldGenerationCounters(G1MonitoringSupport* g1mm,
tonyp@3176:                                                  const char* name)
tonyp@3176:   : G1GenerationCounters(g1mm, name, 1 /* ordinal */, 1 /* spaces */,
tonyp@3176:                G1MonitoringSupport::pad_capacity(0) /* min_capacity */,
tonyp@3176:                G1MonitoringSupport::pad_capacity(g1mm->old_gen_max()),
tonyp@3176:                G1MonitoringSupport::pad_capacity(0) /* curr_capacity */) {
johnc@3620:   if (UsePerfData) {
johnc@3620:     update_all();
johnc@3620:   }
tonyp@3176: }
tonyp@3176: 
tonyp@3176: void G1YoungGenerationCounters::update_all() {
tonyp@3176:   size_t committed =
tonyp@3176:             G1MonitoringSupport::pad_capacity(_g1mm->young_gen_committed(), 3);
tonyp@3176:   _current_size->set_value(committed);
tonyp@3176: }
tonyp@3176: 
tonyp@3176: void G1OldGenerationCounters::update_all() {
tonyp@3176:   size_t committed =
tonyp@3176:             G1MonitoringSupport::pad_capacity(_g1mm->old_gen_committed());
tonyp@3176:   _current_size->set_value(committed);
tonyp@3176: }
tonyp@3176: 
tonyp@3176: G1MonitoringSupport::G1MonitoringSupport(G1CollectedHeap* g1h) :
jmasa@2821:   _g1h(g1h),
jmasa@2821:   _incremental_collection_counters(NULL),
jmasa@2821:   _full_collection_counters(NULL),
tonyp@3176:   _old_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),
tonyp@3176: 
tonyp@3176:   _overall_reserved(0),
tonyp@3176:   _overall_committed(0),    _overall_used(0),
tonyp@3176:   _young_region_num(0),
tonyp@3176:   _young_gen_committed(0),
tonyp@3176:   _eden_committed(0),       _eden_used(0),
tonyp@3176:   _survivor_committed(0),   _survivor_used(0),
tonyp@3176:   _old_committed(0),        _old_used(0) {
tonyp@3176: 
tonyp@3176:   _overall_reserved = g1h->max_capacity();
tonyp@3176:   recalculate_sizes();
tonyp@3176: 
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
tonyp@3176:   _old_collection_counters = new G1OldGenerationCounters(this, "old");
jmasa@2821: 
jmasa@2821:   //  name  "generation.1.space.0"
jmasa@2821:   // Counters are created from maxCapacity, capacity, initCapacity,
jmasa@2821:   // and used.
tonyp@3176:   _old_space_counters = new HSpaceCounters("space", 0 /* ordinal */,
tonyp@3176:     pad_capacity(overall_reserved()) /* max_capacity */,
tonyp@3176:     pad_capacity(old_space_committed()) /* init_capacity */,
tonyp@3176:    _old_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.
tonyp@3176:   // See  _old_collection_counters for additional counters
tonyp@3176:   _young_collection_counters = new G1YoungGenerationCounters(this, "young");
jmasa@2821: 
jmasa@2821:   //  name "generation.0.space.0"
jmasa@2821:   // See _old_space_counters for additional counters
tonyp@3176:   _eden_counters = new HSpaceCounters("eden", 0 /* ordinal */,
tonyp@3176:     pad_capacity(overall_reserved()) /* max_capacity */,
tonyp@3176:     pad_capacity(eden_space_committed()) /* init_capacity */,
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.
tonyp@3176:   _from_counters = new HSpaceCounters("s0", 1 /* ordinal */,
tonyp@3176:     pad_capacity(0) /* max_capacity */,
tonyp@3176:     pad_capacity(0) /* init_capacity */,
jmasa@2821:     _young_collection_counters);
jmasa@2821: 
jmasa@2821:   //  name "generation.0.space.2"
jmasa@2821:   // See _old_space_counters for additional counters
tonyp@3176:   _to_counters = new HSpaceCounters("s1", 2 /* ordinal */,
tonyp@3176:     pad_capacity(overall_reserved()) /* max_capacity */,
tonyp@3176:     pad_capacity(survivor_space_committed()) /* init_capacity */,
jmasa@2821:     _young_collection_counters);
johnc@3620: 
johnc@3620:   if (UsePerfData) {
johnc@3620:     // Given that this survivor space is not used, we update it here
johnc@3620:     // once to reflect that its used space is 0 so that we don't have to
johnc@3620:     // worry about updating it again later.
johnc@3620:     _from_counters->update_used(0);
johnc@3620:   }
jmasa@2821: }
jmasa@2821: 
tonyp@3176: void G1MonitoringSupport::recalculate_sizes() {
tonyp@3176:   G1CollectedHeap* g1 = g1h();
tonyp@3176: 
tonyp@3176:   // Recalculate all the sizes from scratch. We assume that this is
tonyp@3176:   // called at a point where no concurrent updates to the various
tonyp@3176:   // values we read here are possible (i.e., at a STW phase at the end
tonyp@3176:   // of a GC).
tonyp@3176: 
tonyp@3713:   uint young_list_length = g1->young_list()->length();
tonyp@3713:   uint survivor_list_length = g1->g1_policy()->recorded_survivor_regions();
tonyp@3176:   assert(young_list_length >= survivor_list_length, "invariant");
tonyp@3713:   uint eden_list_length = young_list_length - survivor_list_length;
tonyp@3176:   // Max length includes any potential extensions to the young gen
tonyp@3176:   // we'll do when the GC locker is active.
tonyp@3713:   uint young_list_max_length = g1->g1_policy()->young_list_max_length();
tonyp@3176:   assert(young_list_max_length >= survivor_list_length, "invariant");
tonyp@3713:   uint eden_list_max_length = young_list_max_length - survivor_list_length;
tonyp@3176: 
tonyp@3176:   _overall_used = g1->used_unlocked();
tonyp@3713:   _eden_used = (size_t) eden_list_length * HeapRegion::GrainBytes;
tonyp@3713:   _survivor_used = (size_t) survivor_list_length * HeapRegion::GrainBytes;
tonyp@3176:   _young_region_num = young_list_length;
tonyp@3176:   _old_used = subtract_up_to_zero(_overall_used, _eden_used + _survivor_used);
tonyp@3176: 
tonyp@3176:   // First calculate the committed sizes that can be calculated independently.
tonyp@3176:   _survivor_committed = _survivor_used;
tonyp@3176:   _old_committed = HeapRegion::align_up_to_region_byte_size(_old_used);
tonyp@3176: 
tonyp@3176:   // Next, start with the overall committed size.
tonyp@3176:   _overall_committed = g1->capacity();
tonyp@3176:   size_t committed = _overall_committed;
tonyp@3176: 
tonyp@3176:   // Remove the committed size we have calculated so far (for the
tonyp@3176:   // survivor and old space).
tonyp@3176:   assert(committed >= (_survivor_committed + _old_committed), "sanity");
tonyp@3176:   committed -= _survivor_committed + _old_committed;
tonyp@3176: 
tonyp@3176:   // Next, calculate and remove the committed size for the eden.
tonyp@3713:   _eden_committed = (size_t) eden_list_max_length * HeapRegion::GrainBytes;
tonyp@3176:   // Somewhat defensive: be robust in case there are inaccuracies in
tonyp@3176:   // the calculations
tonyp@3176:   _eden_committed = MIN2(_eden_committed, committed);
tonyp@3176:   committed -= _eden_committed;
tonyp@3176: 
tonyp@3176:   // Finally, give the rest to the old space...
tonyp@3176:   _old_committed += committed;
tonyp@3176:   // ..and calculate the young gen committed.
tonyp@3176:   _young_gen_committed = _eden_committed + _survivor_committed;
tonyp@3176: 
tonyp@3176:   assert(_overall_committed ==
tonyp@3176:          (_eden_committed + _survivor_committed + _old_committed),
tonyp@3176:          "the committed sizes should add up");
tonyp@3176:   // Somewhat defensive: cap the eden used size to make sure it
tonyp@3176:   // never exceeds the committed size.
tonyp@3176:   _eden_used = MIN2(_eden_used, _eden_committed);
tonyp@3176:   // _survivor_committed and _old_committed are calculated in terms of
tonyp@3176:   // the corresponding _*_used value, so the next two conditions
tonyp@3176:   // should hold.
tonyp@3176:   assert(_survivor_used <= _survivor_committed, "post-condition");
tonyp@3176:   assert(_old_used <= _old_committed, "post-condition");
jmasa@2821: }
jmasa@2821: 
tonyp@3176: void G1MonitoringSupport::recalculate_eden_size() {
tonyp@3176:   G1CollectedHeap* g1 = g1h();
jmasa@2821: 
tonyp@3176:   // When a new eden region is allocated, only the eden_used size is
tonyp@3176:   // affected (since we have recalculated everything else at the last GC).
jmasa@2821: 
tonyp@3713:   uint young_region_num = g1h()->young_list()->length();
tonyp@3176:   if (young_region_num > _young_region_num) {
tonyp@3713:     uint diff = young_region_num - _young_region_num;
tonyp@3713:     _eden_used += (size_t) diff * HeapRegion::GrainBytes;
tonyp@3176:     // Somewhat defensive: cap the eden used size to make sure it
tonyp@3176:     // never exceeds the committed size.
tonyp@3176:     _eden_used = MIN2(_eden_used, _eden_committed);
tonyp@3176:     _young_region_num = young_region_num;
jmasa@2821:   }
jmasa@2821: }
jmasa@2821: 
tonyp@3176: void G1MonitoringSupport::update_sizes() {
tonyp@3176:   recalculate_sizes();
jmasa@2821:   if (UsePerfData) {
tonyp@3176:     eden_counters()->update_capacity(pad_capacity(eden_space_committed()));
tonyp@3176:     eden_counters()->update_used(eden_space_used());
tonyp@3176:     // only the to survivor space (s1) is active, so we don't need to
tonyp@3176:     // update the counteres for the from survivor space (s0)
tonyp@3176:     to_counters()->update_capacity(pad_capacity(survivor_space_committed()));
tonyp@3176:     to_counters()->update_used(survivor_space_used());
tonyp@3176:     old_space_counters()->update_capacity(pad_capacity(old_space_committed()));
tonyp@3176:     old_space_counters()->update_used(old_space_used());
tonyp@3176:     old_collection_counters()->update_all();
tonyp@3176:     young_collection_counters()->update_all();
coleenp@4037:     MetaspaceCounters::update_performance_counters();
ehelin@5531:     CompressedClassSpaceCounters::update_performance_counters();
tonyp@3176:   }
tonyp@3176: }
tonyp@3176: 
tonyp@3176: void G1MonitoringSupport::update_eden_size() {
tonyp@3176:   recalculate_eden_size();
tonyp@3176:   if (UsePerfData) {
jmasa@2821:     eden_counters()->update_used(eden_space_used());
jmasa@2821:   }
jmasa@2821: }