--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/services/memoryPool.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,249 @@
+/*
+ * Copyright 2003-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+# include "incls/_precompiled.incl"
+# include "incls/_memoryPool.cpp.incl"
+
+MemoryPool::MemoryPool(const char* name,
+ PoolType type,
+ size_t init_size,
+ size_t max_size,
+ bool support_usage_threshold,
+ bool support_gc_threshold) {
+ _name = name;
+ _initial_size = init_size;
+ _max_size = max_size;
+ _memory_pool_obj = NULL;
+ _available_for_allocation = true;
+ _num_managers = 0;
+ _type = type;
+
+ // initialize the max and init size of collection usage
+ _after_gc_usage = MemoryUsage(_initial_size, 0, 0, _max_size);
+
+ _usage_sensor = NULL;
+ _gc_usage_sensor = NULL;
+ // usage threshold supports both high and low threshold
+ _usage_threshold = new ThresholdSupport(support_usage_threshold, support_usage_threshold);
+ // gc usage threshold supports only high threshold
+ _gc_usage_threshold = new ThresholdSupport(support_gc_threshold, support_gc_threshold);
+}
+
+void MemoryPool::add_manager(MemoryManager* mgr) {
+ assert(_num_managers < MemoryPool::max_num_managers, "_num_managers exceeds the max");
+ if (_num_managers < MemoryPool::max_num_managers) {
+ _managers[_num_managers] = mgr;
+ _num_managers++;
+ }
+}
+
+
+// Returns an instanceHandle of a MemoryPool object.
+// It creates a MemoryPool instance when the first time
+// this function is called.
+instanceOop MemoryPool::get_memory_pool_instance(TRAPS) {
+ // Must do an acquire so as to force ordering of subsequent
+ // loads from anything _memory_pool_obj points to or implies.
+ instanceOop pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj);
+ if (pool_obj == NULL) {
+ // It's ok for more than one thread to execute the code up to the locked region.
+ // Extra pool instances will just be gc'ed.
+ klassOop k = Management::sun_management_ManagementFactory_klass(CHECK_NULL);
+ instanceKlassHandle ik(THREAD, k);
+
+ Handle pool_name = java_lang_String::create_from_str(_name, CHECK_NULL);
+ jlong usage_threshold_value = (_usage_threshold->is_high_threshold_supported() ? 0 : -1L);
+ jlong gc_usage_threshold_value = (_gc_usage_threshold->is_high_threshold_supported() ? 0 : -1L);
+
+ JavaValue result(T_OBJECT);
+ JavaCallArguments args;
+ args.push_oop(pool_name); // Argument 1
+ args.push_int((int) is_heap()); // Argument 2
+
+ symbolHandle method_name = vmSymbolHandles::createMemoryPool_name();
+ symbolHandle signature = vmSymbolHandles::createMemoryPool_signature();
+
+ args.push_long(usage_threshold_value); // Argument 3
+ args.push_long(gc_usage_threshold_value); // Argument 4
+
+ JavaCalls::call_static(&result,
+ ik,
+ method_name,
+ signature,
+ &args,
+ CHECK_NULL);
+
+ instanceOop p = (instanceOop) result.get_jobject();
+ instanceHandle pool(THREAD, p);
+
+ {
+ // Get lock since another thread may have create the instance
+ MutexLocker ml(Management_lock);
+
+ // Check if another thread has created the pool. We reload
+ // _memory_pool_obj here because some other thread may have
+ // initialized it while we were executing the code before the lock.
+ //
+ // The lock has done an acquire, so the load can't float above it,
+ // but we need to do a load_acquire as above.
+ pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj);
+ if (pool_obj != NULL) {
+ return pool_obj;
+ }
+
+ // Get the address of the object we created via call_special.
+ pool_obj = pool();
+
+ // Use store barrier to make sure the memory accesses associated
+ // with creating the pool are visible before publishing its address.
+ // The unlock will publish the store to _memory_pool_obj because
+ // it does a release first.
+ OrderAccess::release_store_ptr(&_memory_pool_obj, pool_obj);
+ }
+ }
+
+ return pool_obj;
+}
+
+inline static size_t get_max_value(size_t val1, size_t val2) {
+ return (val1 > val2 ? val1 : val2);
+}
+
+void MemoryPool::record_peak_memory_usage() {
+ // Caller in JDK is responsible for synchronization -
+ // acquire the lock for this memory pool before calling VM
+ MemoryUsage usage = get_memory_usage();
+ size_t peak_used = get_max_value(usage.used(), _peak_usage.used());
+ size_t peak_committed = get_max_value(usage.committed(), _peak_usage.committed());
+ size_t peak_max_size = get_max_value(usage.max_size(), _peak_usage.max_size());
+
+ _peak_usage = MemoryUsage(initial_size(), peak_used, peak_committed, peak_max_size);
+}
+
+static void set_sensor_obj_at(SensorInfo** sensor_ptr, instanceHandle sh) {
+ assert(*sensor_ptr == NULL, "Should be called only once");
+ SensorInfo* sensor = new SensorInfo();
+ sensor->set_sensor(sh());
+ *sensor_ptr = sensor;
+}
+
+void MemoryPool::set_usage_sensor_obj(instanceHandle sh) {
+ set_sensor_obj_at(&_usage_sensor, sh);
+}
+
+void MemoryPool::set_gc_usage_sensor_obj(instanceHandle sh) {
+ set_sensor_obj_at(&_gc_usage_sensor, sh);
+}
+
+void MemoryPool::oops_do(OopClosure* f) {
+ f->do_oop((oop*) &_memory_pool_obj);
+ if (_usage_sensor != NULL) {
+ _usage_sensor->oops_do(f);
+ }
+ if (_gc_usage_sensor != NULL) {
+ _gc_usage_sensor->oops_do(f);
+ }
+}
+
+ContiguousSpacePool::ContiguousSpacePool(ContiguousSpace* space,
+ const char* name,
+ PoolType type,
+ size_t max_size,
+ bool support_usage_threshold) :
+ CollectedMemoryPool(name, type, space->capacity(), max_size,
+ support_usage_threshold), _space(space) {
+}
+
+MemoryUsage ContiguousSpacePool::get_memory_usage() {
+ size_t maxSize = (available_for_allocation() ? max_size() : 0);
+ size_t used = used_in_bytes();
+ size_t committed = _space->capacity();
+
+ return MemoryUsage(initial_size(), used, committed, maxSize);
+}
+
+SurvivorContiguousSpacePool::SurvivorContiguousSpacePool(DefNewGeneration* gen,
+ const char* name,
+ PoolType type,
+ size_t max_size,
+ bool support_usage_threshold) :
+ CollectedMemoryPool(name, type, gen->from()->capacity(), max_size,
+ support_usage_threshold), _gen(gen) {
+}
+
+MemoryUsage SurvivorContiguousSpacePool::get_memory_usage() {
+ size_t maxSize = (available_for_allocation() ? max_size() : 0);
+ size_t used = used_in_bytes();
+ size_t committed = committed_in_bytes();
+
+ return MemoryUsage(initial_size(), used, committed, maxSize);
+}
+
+#ifndef SERIALGC
+CompactibleFreeListSpacePool::CompactibleFreeListSpacePool(CompactibleFreeListSpace* space,
+ const char* name,
+ PoolType type,
+ size_t max_size,
+ bool support_usage_threshold) :
+ CollectedMemoryPool(name, type, space->capacity(), max_size,
+ support_usage_threshold), _space(space) {
+}
+
+MemoryUsage CompactibleFreeListSpacePool::get_memory_usage() {
+ size_t maxSize = (available_for_allocation() ? max_size() : 0);
+ size_t used = used_in_bytes();
+ size_t committed = _space->capacity();
+
+ return MemoryUsage(initial_size(), used, committed, maxSize);
+}
+#endif // SERIALGC
+
+GenerationPool::GenerationPool(Generation* gen,
+ const char* name,
+ PoolType type,
+ bool support_usage_threshold) :
+ CollectedMemoryPool(name, type, gen->capacity(), gen->max_capacity(),
+ support_usage_threshold), _gen(gen) {
+}
+
+MemoryUsage GenerationPool::get_memory_usage() {
+ size_t used = used_in_bytes();
+ size_t committed = _gen->capacity();
+ size_t maxSize = (available_for_allocation() ? max_size() : 0);
+
+ return MemoryUsage(initial_size(), used, committed, maxSize);
+}
+
+CodeHeapPool::CodeHeapPool(CodeHeap* codeHeap, const char* name, bool support_usage_threshold) :
+ MemoryPool(name, NonHeap, codeHeap->capacity(), codeHeap->max_capacity(),
+ support_usage_threshold, false), _codeHeap(codeHeap) {
+}
+
+MemoryUsage CodeHeapPool::get_memory_usage() {
+ size_t used = used_in_bytes();
+ size_t committed = _codeHeap->capacity();
+ size_t maxSize = (available_for_allocation() ? max_size() : 0);
+
+ return MemoryUsage(initial_size(), used, committed, maxSize);
+}