bytecodeHistogram.hpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 1997, 2004, 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// 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