1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/services/memoryManager.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,233 @@
1.4 +/*
1.5 + * Copyright 2003-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// A memory manager is responsible for managing one or more memory pools.
1.29 +// The garbage collector is one type of memory managers responsible
1.30 +// for reclaiming memory occupied by unreachable objects. A Java virtual
1.31 +// machine may have one or more memory managers. It may
1.32 +// add or remove memory managers during execution.
1.33 +// A memory pool can be managed by more than one memory managers.
1.34 +
1.35 +class MemoryPool;
1.36 +class GCMemoryManager;
1.37 +class OopClosure;
1.38 +
1.39 +class MemoryManager : public CHeapObj {
1.40 +private:
1.41 + enum {
1.42 + max_num_pools = 10
1.43 + };
1.44 +
1.45 + MemoryPool* _pools[max_num_pools];
1.46 + int _num_pools;
1.47 +
1.48 +protected:
1.49 + volatile instanceOop _memory_mgr_obj;
1.50 +
1.51 +public:
1.52 + enum Name {
1.53 + Abstract,
1.54 + CodeCache,
1.55 + Copy,
1.56 + MarkSweepCompact,
1.57 + ParNew,
1.58 + ConcurrentMarkSweep,
1.59 + PSScavenge,
1.60 + PSMarkSweep
1.61 + };
1.62 +
1.63 + MemoryManager();
1.64 +
1.65 + int num_memory_pools() const { return _num_pools; }
1.66 + MemoryPool* get_memory_pool(int index) {
1.67 + assert(index >= 0 && index < _num_pools, "Invalid index");
1.68 + return _pools[index];
1.69 + }
1.70 +
1.71 + void add_pool(MemoryPool* pool);
1.72 +
1.73 + bool is_manager(instanceHandle mh) { return mh() == _memory_mgr_obj; }
1.74 +
1.75 + virtual instanceOop get_memory_manager_instance(TRAPS);
1.76 + virtual MemoryManager::Name kind() { return MemoryManager::Abstract; }
1.77 + virtual bool is_gc_memory_manager() { return false; }
1.78 + virtual const char* name() = 0;
1.79 +
1.80 + // GC support
1.81 + void oops_do(OopClosure* f);
1.82 +
1.83 + // Static factory methods to get a memory manager of a specific type
1.84 + static MemoryManager* get_code_cache_memory_manager();
1.85 + static GCMemoryManager* get_copy_memory_manager();
1.86 + static GCMemoryManager* get_msc_memory_manager();
1.87 + static GCMemoryManager* get_parnew_memory_manager();
1.88 + static GCMemoryManager* get_cms_memory_manager();
1.89 + static GCMemoryManager* get_psScavenge_memory_manager();
1.90 + static GCMemoryManager* get_psMarkSweep_memory_manager();
1.91 +
1.92 +};
1.93 +
1.94 +class CodeCacheMemoryManager : public MemoryManager {
1.95 +private:
1.96 +public:
1.97 + CodeCacheMemoryManager() : MemoryManager() {}
1.98 +
1.99 + MemoryManager::Name kind() { return MemoryManager::CodeCache; }
1.100 + const char* name() { return "CodeCacheManager"; }
1.101 +};
1.102 +
1.103 +class GCStatInfo : public CHeapObj {
1.104 +private:
1.105 + size_t _index;
1.106 + jlong _start_time;
1.107 + jlong _end_time;
1.108 +
1.109 + // We keep memory usage of all memory pools
1.110 + MemoryUsage* _before_gc_usage_array;
1.111 + MemoryUsage* _after_gc_usage_array;
1.112 + int _usage_array_size;
1.113 +
1.114 + void set_gc_usage(int pool_index, MemoryUsage, bool before_gc);
1.115 +
1.116 +public:
1.117 + GCStatInfo(int num_pools);
1.118 + ~GCStatInfo();
1.119 +
1.120 + size_t gc_index() { return _index; }
1.121 + jlong start_time() { return _start_time; }
1.122 + jlong end_time() { return _end_time; }
1.123 + int usage_array_size() { return _usage_array_size; }
1.124 + MemoryUsage before_gc_usage_for_pool(int pool_index) {
1.125 + assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
1.126 + return _before_gc_usage_array[pool_index];
1.127 + }
1.128 + MemoryUsage after_gc_usage_for_pool(int pool_index) {
1.129 + assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
1.130 + return _after_gc_usage_array[pool_index];
1.131 + }
1.132 +
1.133 + void set_index(size_t index) { _index = index; }
1.134 + void set_start_time(jlong time) { _start_time = time; }
1.135 + void set_end_time(jlong time) { _end_time = time; }
1.136 + void set_before_gc_usage(int pool_index, MemoryUsage usage) {
1.137 + assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
1.138 + set_gc_usage(pool_index, usage, true /* before gc */);
1.139 + }
1.140 + void set_after_gc_usage(int pool_index, MemoryUsage usage) {
1.141 + assert(pool_index >= 0 && pool_index < _usage_array_size, "Range checking");
1.142 + set_gc_usage(pool_index, usage, false /* after gc */);
1.143 + }
1.144 +
1.145 + void copy_stat(GCStatInfo* stat);
1.146 +};
1.147 +
1.148 +class GCMemoryManager : public MemoryManager {
1.149 +private:
1.150 + // TODO: We should unify the GCCounter and GCMemoryManager statistic
1.151 + size_t _num_collections;
1.152 + elapsedTimer _accumulated_timer;
1.153 + elapsedTimer _gc_timer; // for measuring every GC duration
1.154 + GCStatInfo* _last_gc_stat;
1.155 + int _num_gc_threads;
1.156 +public:
1.157 + GCMemoryManager();
1.158 + ~GCMemoryManager();
1.159 +
1.160 + void initialize_gc_stat_info();
1.161 +
1.162 + bool is_gc_memory_manager() { return true; }
1.163 + jlong gc_time_ms() { return _accumulated_timer.milliseconds(); }
1.164 + size_t gc_count() { return _num_collections; }
1.165 + int num_gc_threads() { return _num_gc_threads; }
1.166 + void set_num_gc_threads(int count) { _num_gc_threads = count; }
1.167 +
1.168 + void gc_begin();
1.169 + void gc_end();
1.170 +
1.171 + void reset_gc_stat() { _num_collections = 0; _accumulated_timer.reset(); }
1.172 + GCStatInfo* last_gc_stat() { return _last_gc_stat; }
1.173 +
1.174 + virtual MemoryManager::Name kind() = 0;
1.175 +};
1.176 +
1.177 +// These subclasses of GCMemoryManager are defined to include
1.178 +// GC-specific information.
1.179 +// TODO: Add GC-specific information
1.180 +class CopyMemoryManager : public GCMemoryManager {
1.181 +private:
1.182 +public:
1.183 + CopyMemoryManager() : GCMemoryManager() {}
1.184 +
1.185 + MemoryManager::Name kind() { return MemoryManager::Copy; }
1.186 + const char* name() { return "Copy"; }
1.187 +};
1.188 +
1.189 +class MSCMemoryManager : public GCMemoryManager {
1.190 +private:
1.191 +public:
1.192 + MSCMemoryManager() : GCMemoryManager() {}
1.193 +
1.194 + MemoryManager::Name kind() { return MemoryManager::MarkSweepCompact; }
1.195 + const char* name() { return "MarkSweepCompact"; }
1.196 +
1.197 +};
1.198 +
1.199 +class ParNewMemoryManager : public GCMemoryManager {
1.200 +private:
1.201 +public:
1.202 + ParNewMemoryManager() : GCMemoryManager() {}
1.203 +
1.204 + MemoryManager::Name kind() { return MemoryManager::ParNew; }
1.205 + const char* name() { return "ParNew"; }
1.206 +
1.207 +};
1.208 +
1.209 +class CMSMemoryManager : public GCMemoryManager {
1.210 +private:
1.211 +public:
1.212 + CMSMemoryManager() : GCMemoryManager() {}
1.213 +
1.214 + MemoryManager::Name kind() { return MemoryManager::ConcurrentMarkSweep; }
1.215 + const char* name() { return "ConcurrentMarkSweep";}
1.216 +
1.217 +};
1.218 +
1.219 +class PSScavengeMemoryManager : public GCMemoryManager {
1.220 +private:
1.221 +public:
1.222 + PSScavengeMemoryManager() : GCMemoryManager() {}
1.223 +
1.224 + MemoryManager::Name kind() { return MemoryManager::PSScavenge; }
1.225 + const char* name() { return "PS Scavenge"; }
1.226 +
1.227 +};
1.228 +
1.229 +class PSMarkSweepMemoryManager : public GCMemoryManager {
1.230 +private:
1.231 +public:
1.232 + PSMarkSweepMemoryManager() : GCMemoryManager() {}
1.233 +
1.234 + MemoryManager::Name kind() { return MemoryManager::PSMarkSweep; }
1.235 + const char* name() { return "PS MarkSweep"; }
1.236 +};
