jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1MonitoringSupport.cpp@4f93f0d00802 (annotated)

src/share/vm/gc_implementation/g1/g1MonitoringSupport.cpp@4f93f0d00802 (annotated)

src/share/vm/gc_implementation/g1/g1MonitoringSupport.cpp

Tue, 20 Sep 2011 09:59:59 -0400

author: tonyp
date: Tue, 20 Sep 2011 09:59:59 -0400
changeset 3168: 4f93f0d00802
parent 2821: b52782ae3880
child 3176: 8229bd737950
permissions: -rw-r--r--

7059019: G1: add G1 support to the SA
Summary: Extend the SA to recognize the G1CollectedHeap and implement any code that's needed by our serviceability tools (jmap, jinfo, jstack, etc.) that depend on the SA.
Reviewed-by: never, poonam, johnc

 /*
  * 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());
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/g1MonitoringSupport.cpp@4f93f0d00802 (annotated)

src/share/vm/gc_implementation/g1/g1MonitoringSupport.cpp