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src/share/vm/runtime/aprofiler.hpp@fa83ab460c54 (annotated)

src/share/vm/runtime/aprofiler.hpp

Fri, 22 Oct 2010 15:59:34 -0400

author

acorn

date

Fri, 22 Oct 2010 15:59:34 -0400

changeset 2233

fa83ab460c54

parent 1907

c18cbe5936b8

child 2314

f95d63e2154a

permissions

-rw-r--r--

6988353: refactor contended sync subsystem
Summary: reduce complexity by factoring synchronizer.cpp
Reviewed-by: dholmes, never, coleenp

duke@435	1	/*
trims@1907	2	* Copyright (c) 1997, 2003, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* 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;
ysr@777	36	friend class G1CollectedHeap;
duke@435	37	friend class MarkSweep;
duke@435	38	private:
duke@435	39	static bool _active; // tells whether profiler is active
duke@435	40	static GrowableArray<klassOop>* _print_array; // temporary array for printing
duke@435	41
duke@435	42	// Utility printing functions
duke@435	43	static void add_class_to_array(klassOop k);
duke@435	44	static void add_classes_to_array(klassOop k);
duke@435	45	static int compare_classes(klassOop* k1, klassOop* k2);
duke@435	46	static int average(size_t alloc_size, int alloc_count);
duke@435	47	static void sort_and_print_array(size_t cutoff);
duke@435	48
duke@435	49	// Call for collecting allocation information. Called at scavenge, mark-sweep and disengage.
duke@435	50	static void iterate_since_last_gc();
duke@435	51
duke@435	52	public:
duke@435	53	// Start profiler
duke@435	54	static void engage();
duke@435	55	// Stop profiler
duke@435	56	static void disengage();
duke@435	57	// Tells whether profiler is active
duke@435	58	static bool is_active() { return _active; }
duke@435	59	// Print profile
duke@435	60	static void print(size_t cutoff); // Cutoff in total allocation size (in words)
duke@435	61	};