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src/share/vm/interpreter/bytecodeHistogram.hpp@feeb96a45707 (annotated)

src/share/vm/interpreter/bytecodeHistogram.hpp

Wed, 28 May 2008 21:06:24 -0700

author

coleenp

date

Wed, 28 May 2008 21:06:24 -0700

changeset 602

feeb96a45707

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6696264: assert("narrow oop can never be zero") for GCBasher & ParNewGC
Summary: decouple set_klass() with zeroing the gap when compressed.
Reviewed-by: kvn, ysr, jrose

duke@435	1	/*
duke@435	2	* Copyright 1997-2004 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	// BytecodeCounter counts the number of bytecodes executed
duke@435	26
duke@435	27	class BytecodeCounter: AllStatic {
duke@435	28	private:
duke@435	29	NOT_PRODUCT(static int _counter_value;)
duke@435	30	NOT_PRODUCT(static jlong _reset_time;)
duke@435	31
duke@435	32	friend class TemplateInterpreterGenerator;
duke@435	33	friend class BytecodeInterpreter;
duke@435	34
duke@435	35	public:
duke@435	36	// Initialization
duke@435	37	static void reset() PRODUCT_RETURN;
duke@435	38
duke@435	39	// Counter info (all info since last reset)
duke@435	40	static int counter_value() PRODUCT_RETURN0 NOT_PRODUCT({ return _counter_value; });
duke@435	41	static double elapsed_time() PRODUCT_RETURN0; // in seconds
duke@435	42	static double frequency() PRODUCT_RETURN0; // bytecodes/seconds
duke@435	43
duke@435	44	// Counter printing
duke@435	45	static void print() PRODUCT_RETURN;
duke@435	46	};
duke@435	47
duke@435	48
duke@435	49	// BytecodeHistogram collects number of executions of bytecodes
duke@435	50
duke@435	51	class BytecodeHistogram: AllStatic {
duke@435	52	private:
duke@435	53	NOT_PRODUCT(static int _counters[Bytecodes::number_of_codes];) // a counter for each bytecode
duke@435	54
duke@435	55	friend class TemplateInterpreterGenerator;
duke@435	56	friend class InterpreterGenerator;
duke@435	57	friend class BytecodeInterpreter;
duke@435	58
duke@435	59	public:
duke@435	60	// Initialization
duke@435	61	static void reset() PRODUCT_RETURN; // reset counters
duke@435	62
duke@435	63	// Profile printing
duke@435	64	static void print(float cutoff = 0.01F) PRODUCT_RETURN; // cutoff in percent
duke@435	65	};
duke@435	66
duke@435	67
duke@435	68	// BytecodePairHistogram collects number of executions of bytecode pairs.
duke@435	69	// A bytecode pair is any sequence of two consequtive bytecodes.
duke@435	70
duke@435	71	class BytecodePairHistogram: AllStatic {
duke@435	72	public: // for SparcWorks
duke@435	73	enum Constants {
duke@435	74	log2_number_of_codes = 8, // use a power of 2 for faster addressing
duke@435	75	number_of_codes = 1 << log2_number_of_codes, // must be no less than Bytecodes::number_of_codes
duke@435	76	number_of_pairs = number_of_codes * number_of_codes
duke@435	77	};
duke@435	78
duke@435	79	private:
duke@435	80	NOT_PRODUCT(static int _index;) // new bytecode is shifted in - used to index into _counters
duke@435	81	NOT_PRODUCT(static int _counters[number_of_pairs];) // a counter for each pair
duke@435	82
duke@435	83	friend class TemplateInterpreterGenerator;
duke@435	84	friend class InterpreterGenerator;
duke@435	85
duke@435	86	public:
duke@435	87	// Initialization
duke@435	88	static void reset() PRODUCT_RETURN; // reset counters
duke@435	89
duke@435	90	// Profile printing
duke@435	91	static void print(float cutoff = 0.01F) PRODUCT_RETURN; // cutoff in percent
duke@435	92	};