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comparison src/share/vm/interpreter/bytecodeHistogram.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1997-2004 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // BytecodeCounter counts the number of bytecodes executed
26
27 class BytecodeCounter: AllStatic {
28 private:
29 NOT_PRODUCT(static int _counter_value;)
30 NOT_PRODUCT(static jlong _reset_time;)
31
32 friend class TemplateInterpreterGenerator;
33 friend class BytecodeInterpreter;
34
35 public:
36 // Initialization
37 static void reset() PRODUCT_RETURN;
38
39 // Counter info (all info since last reset)
40 static int counter_value() PRODUCT_RETURN0 NOT_PRODUCT({ return _counter_value; });
41 static double elapsed_time() PRODUCT_RETURN0; // in seconds
42 static double frequency() PRODUCT_RETURN0; // bytecodes/seconds
43
44 // Counter printing
45 static void print() PRODUCT_RETURN;
46 };
47
48
49 // BytecodeHistogram collects number of executions of bytecodes
50
51 class BytecodeHistogram: AllStatic {
52 private:
53 NOT_PRODUCT(static int _counters[Bytecodes::number_of_codes];) // a counter for each bytecode
54
55 friend class TemplateInterpreterGenerator;
56 friend class InterpreterGenerator;
57 friend class BytecodeInterpreter;
58
59 public:
60 // Initialization
61 static void reset() PRODUCT_RETURN; // reset counters
62
63 // Profile printing
64 static void print(float cutoff = 0.01F) PRODUCT_RETURN; // cutoff in percent
65 };
66
67
68 // BytecodePairHistogram collects number of executions of bytecode pairs.
69 // A bytecode pair is any sequence of two consequtive bytecodes.
70
71 class BytecodePairHistogram: AllStatic {
72 public: // for SparcWorks
73 enum Constants {
74 log2_number_of_codes = 8, // use a power of 2 for faster addressing
75 number_of_codes = 1 << log2_number_of_codes, // must be no less than Bytecodes::number_of_codes
76 number_of_pairs = number_of_codes * number_of_codes
77 };
78
79 private:
80 NOT_PRODUCT(static int _index;) // new bytecode is shifted in - used to index into _counters
81 NOT_PRODUCT(static int _counters[number_of_pairs];) // a counter for each pair
82
83 friend class TemplateInterpreterGenerator;
84 friend class InterpreterGenerator;
85
86 public:
87 // Initialization
88 static void reset() PRODUCT_RETURN; // reset counters
89
90 // Profile printing
91 static void print(float cutoff = 0.01F) PRODUCT_RETURN; // cutoff in percent
92 };