| /* |
| * Copyright 1997-2003 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. |
| * |
| */ |
| |
| // A simple allocation profiler for Java. The profiler collects and prints |
| // the number and total size of instances allocated per class, including |
| // array classes. |
| // |
| // The profiler is currently global for all threads. It can be changed to a |
| // per threads profiler by keeping a more elaborate data structure and calling |
| // iterate_since_last_scavenge at thread switches. |
| |
| |
| class AllocationProfiler: AllStatic { |
| friend class GenCollectedHeap; |
| friend class MarkSweep; |
| private: |
| static bool _active; // tells whether profiler is active |
| static GrowableArray<klassOop>* _print_array; // temporary array for printing |
| |
| // Utility printing functions |
| static void add_class_to_array(klassOop k); |
| static void add_classes_to_array(klassOop k); |
| static int compare_classes(klassOop* k1, klassOop* k2); |
| static int average(size_t alloc_size, int alloc_count); |
| static void sort_and_print_array(size_t cutoff); |
| |
| // Call for collecting allocation information. Called at scavenge, mark-sweep and disengage. |
| static void iterate_since_last_gc(); |
| |
| public: |
| // Start profiler |
| static void engage(); |
| // Stop profiler |
| static void disengage(); |
| // Tells whether profiler is active |
| static bool is_active() { return _active; } |
| // Print profile |
| static void print(size_t cutoff); // Cutoff in total allocation size (in words) |
| }; |