1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/services/memoryManager.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,287 @@
1.4 +/*
1.5 + * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_SERVICES_MEMORYMANAGER_HPP
1.29 +#define SHARE_VM_SERVICES_MEMORYMANAGER_HPP
1.30 +
1.31 +#include "memory/allocation.hpp"
1.32 +#include "runtime/timer.hpp"
1.33 +#include "services/memoryUsage.hpp"
1.34 +
1.35 +// A memory manager is responsible for managing one or more memory pools.
1.36 +// The garbage collector is one type of memory managers responsible
1.37 +// for reclaiming memory occupied by unreachable objects. A Java virtual
1.38 +// machine may have one or more memory managers. It may
1.39 +// add or remove memory managers during execution.
1.40 +// A memory pool can be managed by more than one memory managers.
1.41 +
1.42 +class MemoryPool;
1.43 +class GCMemoryManager;
1.44 +class OopClosure;
1.45 +
1.46 +class MemoryManager : public CHeapObj<mtInternal> {
1.47 +private:
1.48 + enum {
1.49 + max_num_pools = 10
1.50 + };
1.51 +
1.52 + MemoryPool* _pools[max_num_pools];
1.53 + int _num_pools;
1.54 +
1.55 +protected:
1.56 + volatile instanceOop _memory_mgr_obj;
1.57 +
1.58 +public:
1.59 + enum Name {
1.60 + Abstract,
1.61 + CodeCache,
1.62 + Metaspace,
1.63 + Copy,
1.64 + MarkSweepCompact,
1.65 + ParNew,
1.66 + ConcurrentMarkSweep,
1.67 + PSScavenge,
1.68 + PSMarkSweep,
1.69 + G1YoungGen,
1.70 + G1OldGen
1.71 + };
1.72 +
1.73 + MemoryManager();
1.74 +
1.75 + int num_memory_pools() const { return _num_pools; }
1.76 + MemoryPool* get_memory_pool(int index) {
1.77 + assert(index >= 0 && index < _num_pools, "Invalid index");
1.78 + return _pools[index];
1.79 + }
1.80 +
1.81 + void add_pool(MemoryPool* pool);
1.82 +
1.83 + bool is_manager(instanceHandle mh) { return mh() == _memory_mgr_obj; }
1.84 +
1.85 + virtual instanceOop get_memory_manager_instance(TRAPS);
1.86 + virtual MemoryManager::Name kind() { return MemoryManager::Abstract; }
1.87 + virtual bool is_gc_memory_manager() { return false; }
1.88 + virtual const char* name() = 0;
1.89 +
1.90 + // GC support
1.91 + void oops_do(OopClosure* f);
1.92 +
1.93 + // Static factory methods to get a memory manager of a specific type
1.94 + static MemoryManager* get_code_cache_memory_manager();
1.95 + static MemoryManager* get_metaspace_memory_manager();
1.96 + static GCMemoryManager* get_copy_memory_manager();
1.97 + static GCMemoryManager* get_msc_memory_manager();
1.98 + static GCMemoryManager* get_parnew_memory_manager();
1.99 + static GCMemoryManager* get_cms_memory_manager();
1.100 + static GCMemoryManager* get_psScavenge_memory_manager();
1.101 + static GCMemoryManager* get_psMarkSweep_memory_manager();
1.102 + static GCMemoryManager* get_g1YoungGen_memory_manager();
1.103 + static GCMemoryManager* get_g1OldGen_memory_manager();
1.104 +
1.105 +};
1.106 +
1.107 +class CodeCacheMemoryManager : public MemoryManager {
1.108 +private:
1.109 +public:
1.110 + CodeCacheMemoryManager() : MemoryManager() {}
1.111 +
1.112 + MemoryManager::Name kind() { return MemoryManager::CodeCache; }
1.113 + const char* name() { return "CodeCacheManager"; }
1.114 +};
1.115 +
1.116 +class MetaspaceMemoryManager : public MemoryManager {
1.117 +public:
1.118 + MetaspaceMemoryManager() : MemoryManager() {}
1.119 +
1.120 + MemoryManager::Name kind() { return MemoryManager::Metaspace; }
1.121 + const char *name() { return "Metaspace Manager"; }
1.122 +};
1.123 +
1.124 +class GCStatInfo : public ResourceObj {
1.125 +private:
1.126 + size_t _index;
1.127 + jlong _start_time;
1.128 + jlong _end_time;
1.129 +
1.130 + // We keep memory usage of all memory pools
1.131 + MemoryUsage* _before_gc_usage_array;
1.132 + MemoryUsage* _after_gc_usage_array;
1.133 + int _usage_array_size;
1.134 +
1.135 + void set_gc_usage(int pool_index, MemoryUsage, bool before_gc);
1.136 +
1.137 +public:
1.138 + GCStatInfo(int num_pools);
1.139 + ~GCStatInfo();
1.140 +
1.141 + size_t gc_index() { return _index; }
1.142 + jlong start_time() { return _start_time; }
1.143 + jlong end_time() { return _end_time; }
1.144 + int usage_array_size() { return _usage_array_size; }
1.145 + MemoryUsage before_gc_usage_for_pool(int pool_index) {
1.146 + assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
1.147 + return _before_gc_usage_array[pool_index];
1.148 + }
1.149 + MemoryUsage after_gc_usage_for_pool(int pool_index) {
1.150 + assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
1.151 + return _after_gc_usage_array[pool_index];
1.152 + }
1.153 +
1.154 + MemoryUsage* before_gc_usage_array() { return _before_gc_usage_array; }
1.155 + MemoryUsage* after_gc_usage_array() { return _after_gc_usage_array; }
1.156 +
1.157 + void set_index(size_t index) { _index = index; }
1.158 + void set_start_time(jlong time) { _start_time = time; }
1.159 + void set_end_time(jlong time) { _end_time = time; }
1.160 + void set_before_gc_usage(int pool_index, MemoryUsage usage) {
1.161 + assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
1.162 + set_gc_usage(pool_index, usage, true /* before gc */);
1.163 + }
1.164 + void set_after_gc_usage(int pool_index, MemoryUsage usage) {
1.165 + assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
1.166 + set_gc_usage(pool_index, usage, false /* after gc */);
1.167 + }
1.168 +
1.169 + void clear();
1.170 +};
1.171 +
1.172 +class GCMemoryManager : public MemoryManager {
1.173 +private:
1.174 + // TODO: We should unify the GCCounter and GCMemoryManager statistic
1.175 + size_t _num_collections;
1.176 + elapsedTimer _accumulated_timer;
1.177 + elapsedTimer _gc_timer; // for measuring every GC duration
1.178 + GCStatInfo* _last_gc_stat;
1.179 + Mutex* _last_gc_lock;
1.180 + GCStatInfo* _current_gc_stat;
1.181 + int _num_gc_threads;
1.182 + volatile bool _notification_enabled;
1.183 +public:
1.184 + GCMemoryManager();
1.185 + ~GCMemoryManager();
1.186 +
1.187 + void initialize_gc_stat_info();
1.188 +
1.189 + bool is_gc_memory_manager() { return true; }
1.190 + jlong gc_time_ms() { return _accumulated_timer.milliseconds(); }
1.191 + size_t gc_count() { return _num_collections; }
1.192 + int num_gc_threads() { return _num_gc_threads; }
1.193 + void set_num_gc_threads(int count) { _num_gc_threads = count; }
1.194 +
1.195 + void gc_begin(bool recordGCBeginTime, bool recordPreGCUsage,
1.196 + bool recordAccumulatedGCTime);
1.197 + void gc_end(bool recordPostGCUsage, bool recordAccumulatedGCTime,
1.198 + bool recordGCEndTime, bool countCollection, GCCause::Cause cause);
1.199 +
1.200 + void reset_gc_stat() { _num_collections = 0; _accumulated_timer.reset(); }
1.201 +
1.202 + // Copy out _last_gc_stat to the given destination, returning
1.203 + // the collection count. Zero signifies no gc has taken place.
1.204 + size_t get_last_gc_stat(GCStatInfo* dest);
1.205 +
1.206 + void set_notification_enabled(bool enabled) { _notification_enabled = enabled; }
1.207 + bool is_notification_enabled() { return _notification_enabled; }
1.208 + virtual MemoryManager::Name kind() = 0;
1.209 +};
1.210 +
1.211 +// These subclasses of GCMemoryManager are defined to include
1.212 +// GC-specific information.
1.213 +// TODO: Add GC-specific information
1.214 +class CopyMemoryManager : public GCMemoryManager {
1.215 +private:
1.216 +public:
1.217 + CopyMemoryManager() : GCMemoryManager() {}
1.218 +
1.219 + MemoryManager::Name kind() { return MemoryManager::Copy; }
1.220 + const char* name() { return "Copy"; }
1.221 +};
1.222 +
1.223 +class MSCMemoryManager : public GCMemoryManager {
1.224 +private:
1.225 +public:
1.226 + MSCMemoryManager() : GCMemoryManager() {}
1.227 +
1.228 + MemoryManager::Name kind() { return MemoryManager::MarkSweepCompact; }
1.229 + const char* name() { return "MarkSweepCompact"; }
1.230 +
1.231 +};
1.232 +
1.233 +class ParNewMemoryManager : public GCMemoryManager {
1.234 +private:
1.235 +public:
1.236 + ParNewMemoryManager() : GCMemoryManager() {}
1.237 +
1.238 + MemoryManager::Name kind() { return MemoryManager::ParNew; }
1.239 + const char* name() { return "ParNew"; }
1.240 +
1.241 +};
1.242 +
1.243 +class CMSMemoryManager : public GCMemoryManager {
1.244 +private:
1.245 +public:
1.246 + CMSMemoryManager() : GCMemoryManager() {}
1.247 +
1.248 + MemoryManager::Name kind() { return MemoryManager::ConcurrentMarkSweep; }
1.249 + const char* name() { return "ConcurrentMarkSweep";}
1.250 +
1.251 +};
1.252 +
1.253 +class PSScavengeMemoryManager : public GCMemoryManager {
1.254 +private:
1.255 +public:
1.256 + PSScavengeMemoryManager() : GCMemoryManager() {}
1.257 +
1.258 + MemoryManager::Name kind() { return MemoryManager::PSScavenge; }
1.259 + const char* name() { return "PS Scavenge"; }
1.260 +
1.261 +};
1.262 +
1.263 +class PSMarkSweepMemoryManager : public GCMemoryManager {
1.264 +private:
1.265 +public:
1.266 + PSMarkSweepMemoryManager() : GCMemoryManager() {}
1.267 +
1.268 + MemoryManager::Name kind() { return MemoryManager::PSMarkSweep; }
1.269 + const char* name() { return "PS MarkSweep"; }
1.270 +};
1.271 +
1.272 +class G1YoungGenMemoryManager : public GCMemoryManager {
1.273 +private:
1.274 +public:
1.275 + G1YoungGenMemoryManager() : GCMemoryManager() {}
1.276 +
1.277 + MemoryManager::Name kind() { return MemoryManager::G1YoungGen; }
1.278 + const char* name() { return "G1 Young Generation"; }
1.279 +};
1.280 +
1.281 +class G1OldGenMemoryManager : public GCMemoryManager {
1.282 +private:
1.283 +public:
1.284 + G1OldGenMemoryManager() : GCMemoryManager() {}
1.285 +
1.286 + MemoryManager::Name kind() { return MemoryManager::G1OldGen; }
1.287 + const char* name() { return "G1 Old Generation"; }
1.288 +};
1.289 +
1.290 +#endif // SHARE_VM_SERVICES_MEMORYMANAGER_HPP
