1 /*
2 * Copyright (c) 1997, 2022, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_INTERPRETER_BYTECODEHISTOGRAM_HPP
26 #define SHARE_INTERPRETER_BYTECODEHISTOGRAM_HPP
27
28 #include "interpreter/bytecodes.hpp"
29 #include "memory/allStatic.hpp"
30
31 // BytecodeCounter counts the number of bytecodes executed
32
33 class BytecodeCounter: AllStatic {
34 private:
35 NOT_PRODUCT(static int _counter_value;)
36 NOT_PRODUCT(static jlong _reset_time;)
37
38 friend class TemplateInterpreterGenerator;
39 friend class BytecodeInterpreter;
40
41 public:
42 // Initialization
43 static void reset() PRODUCT_RETURN;
44
45 // Counter info (all info since last reset)
46 static int counter_value() PRODUCT_RETURN0 NOT_PRODUCT({ return _counter_value; });
47 static double elapsed_time() PRODUCT_RETURN0; // in seconds
48 static double frequency() PRODUCT_RETURN0; // bytecodes/seconds
49
50 // Counter printing
51 static void print() PRODUCT_RETURN;
52 };
53
54
55 // BytecodeHistogram collects number of executions of bytecodes
56
57 class BytecodeHistogram: AllStatic {
58 private:
59 NOT_PRODUCT(static int _counters[Bytecodes::number_of_codes];) // a counter for each bytecode
60
61 friend class TemplateInterpreterGenerator;
62 friend class BytecodeInterpreter;
63
64 public:
65 // Initialization
66 static void reset() PRODUCT_RETURN; // reset counters
67
68 // Profile printing
69 static void print(float cutoff = 0.01F) PRODUCT_RETURN; // cutoff in percent
70 };
71
72
73 // BytecodePairHistogram collects number of executions of bytecode pairs.
74 // A bytecode pair is any sequence of two consecutive bytecodes.
75
76 class BytecodePairHistogram: AllStatic {
77 public: // for solstudio
78 enum Constants {
79 log2_number_of_codes = 8, // use a power of 2 for faster addressing
80 number_of_codes = 1 << log2_number_of_codes, // must be no less than Bytecodes::number_of_codes
81 number_of_pairs = number_of_codes * number_of_codes
82 };
83
84 private:
85 NOT_PRODUCT(static int _index;) // new bytecode is shifted in - used to index into _counters
86 NOT_PRODUCT(static int _counters[number_of_pairs];) // a counter for each pair
87
88 friend class TemplateInterpreterGenerator;
89
90 public:
91 // Initialization
92 static void reset() PRODUCT_RETURN; // reset counters
93
94 // Profile printing
95 static void print(float cutoff = 0.01F) PRODUCT_RETURN; // cutoff in percent
96 };
97
98 #endif // SHARE_INTERPRETER_BYTECODEHISTOGRAM_HPP