Mercurial > hg > graal-compiler
diff src/share/vm/runtime/aprofiler.hpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 37f87013dfd8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/runtime/aprofiler.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,60 @@ +/* + * 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) +};