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