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src/share/vm/runtime/aprofiler.hpp@9f4457a14b58 (annotated)

src/share/vm/runtime/aprofiler.hpp

Wed, 09 Apr 2008 15:10:22 -0700

author

rasbold

date

Wed, 09 Apr 2008 15:10:22 -0700

changeset 544

9f4457a14b58

parent 435

a61af66fc99e

child 777

37f87013dfd8

permissions

-rw-r--r--

Merge

duke@435	1	/*
duke@435	2	* Copyright 1997-2003 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// A simple allocation profiler for Java. The profiler collects and prints
duke@435	26	// the number and total size of instances allocated per class, including
duke@435	27	// array classes.
duke@435	28	//
duke@435	29	// The profiler is currently global for all threads. It can be changed to a
duke@435	30	// per threads profiler by keeping a more elaborate data structure and calling
duke@435	31	// iterate_since_last_scavenge at thread switches.
duke@435	32
duke@435	33
duke@435	34	class AllocationProfiler: AllStatic {
duke@435	35	friend class GenCollectedHeap;
duke@435	36	friend class MarkSweep;
duke@435	37	private:
duke@435	38	static bool _active; // tells whether profiler is active
duke@435	39	static GrowableArray<klassOop>* _print_array; // temporary array for printing
duke@435	40
duke@435	41	// Utility printing functions
duke@435	42	static void add_class_to_array(klassOop k);
duke@435	43	static void add_classes_to_array(klassOop k);
duke@435	44	static int compare_classes(klassOop* k1, klassOop* k2);
duke@435	45	static int average(size_t alloc_size, int alloc_count);
duke@435	46	static void sort_and_print_array(size_t cutoff);
duke@435	47
duke@435	48	// Call for collecting allocation information. Called at scavenge, mark-sweep and disengage.
duke@435	49	static void iterate_since_last_gc();
duke@435	50
duke@435	51	public:
duke@435	52	// Start profiler
duke@435	53	static void engage();
duke@435	54	// Stop profiler
duke@435	55	static void disengage();
duke@435	56	// Tells whether profiler is active
duke@435	57	static bool is_active() { return _active; }
duke@435	58	// Print profile
duke@435	59	static void print(size_t cutoff); // Cutoff in total allocation size (in words)
duke@435	60	};