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view src/share/vm/runtime/aprofiler.hpp @ 10405:f2110083203d
8005849: JEP 167: Event-Based JVM Tracing
Reviewed-by: acorn, coleenp, sla
Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>
author | sla |
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date | Mon, 10 Jun 2013 11:30:51 +0200 |
parents | da91efe96a93 |
children |
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/* * Copyright (c) 1997, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_RUNTIME_APROFILER_HPP #define SHARE_VM_RUNTIME_APROFILER_HPP #include "memory/allocation.hpp" #include "memory/universe.hpp" #include "oops/klass.hpp" #include "utilities/top.hpp" // 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 G1CollectedHeap; friend class MarkSweep; private: static bool _active; // tells whether profiler is active static GrowableArray<Klass*>* _print_array; // temporary array for printing // Utility printing functions static void add_class_to_array(Klass* k); static void add_classes_to_array(Klass* k); static int compare_classes(Klass** k1, Klass** 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) }; #endif // SHARE_VM_RUNTIME_APROFILER_HPP