bytecodeHistogram.hpp revision 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
27class 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
51class 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
71class 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};
93