duke@435: /*
stefank@2314:  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #ifndef SHARE_VM_INTERPRETER_BYTECODEHISTOGRAM_HPP
stefank@2314: #define SHARE_VM_INTERPRETER_BYTECODEHISTOGRAM_HPP
stefank@2314: 
stefank@2314: #include "interpreter/bytecodes.hpp"
stefank@2314: #include "memory/allocation.hpp"
stefank@2314: 
duke@435: // BytecodeCounter counts the number of bytecodes executed
duke@435: 
duke@435: class BytecodeCounter: AllStatic {
duke@435:  private:
duke@435:   NOT_PRODUCT(static int   _counter_value;)
duke@435:   NOT_PRODUCT(static jlong _reset_time;)
duke@435: 
duke@435:   friend class TemplateInterpreterGenerator;
duke@435:   friend class         BytecodeInterpreter;
duke@435: 
duke@435:  public:
duke@435:   // Initialization
duke@435:   static void reset()                      PRODUCT_RETURN;
duke@435: 
duke@435:   // Counter info (all info since last reset)
duke@435:   static int    counter_value()            PRODUCT_RETURN0 NOT_PRODUCT({ return _counter_value; });
duke@435:   static double elapsed_time()             PRODUCT_RETURN0; // in seconds
duke@435:   static double frequency()                PRODUCT_RETURN0; // bytecodes/seconds
duke@435: 
duke@435:   // Counter printing
duke@435:   static void   print()                    PRODUCT_RETURN;
duke@435: };
duke@435: 
duke@435: 
duke@435: // BytecodeHistogram collects number of executions of bytecodes
duke@435: 
duke@435: class BytecodeHistogram: AllStatic {
duke@435:  private:
duke@435:   NOT_PRODUCT(static int _counters[Bytecodes::number_of_codes];)   // a counter for each bytecode
duke@435: 
duke@435:   friend class TemplateInterpreterGenerator;
duke@435:   friend class         InterpreterGenerator;
duke@435:   friend class         BytecodeInterpreter;
duke@435: 
duke@435:  public:
duke@435:   // Initialization
duke@435:   static void reset()                       PRODUCT_RETURN; // reset counters
duke@435: 
duke@435:   // Profile printing
duke@435:   static void print(float cutoff = 0.01F)   PRODUCT_RETURN; // cutoff in percent
duke@435: };
duke@435: 
duke@435: 
duke@435: // BytecodePairHistogram collects number of executions of bytecode pairs.
duke@435: // A bytecode pair is any sequence of two consequtive bytecodes.
duke@435: 
duke@435: class BytecodePairHistogram: AllStatic {
duke@435:  public: // for SparcWorks
duke@435:   enum Constants {
duke@435:     log2_number_of_codes = 8,                         // use a power of 2 for faster addressing
duke@435:     number_of_codes      = 1 << log2_number_of_codes, // must be no less than Bytecodes::number_of_codes
duke@435:     number_of_pairs      = number_of_codes * number_of_codes
duke@435:   };
duke@435: 
duke@435:  private:
duke@435:   NOT_PRODUCT(static int  _index;)                      // new bytecode is shifted in - used to index into _counters
duke@435:   NOT_PRODUCT(static int  _counters[number_of_pairs];)  // a counter for each pair
duke@435: 
duke@435:   friend class TemplateInterpreterGenerator;
duke@435:   friend class         InterpreterGenerator;
duke@435: 
duke@435:  public:
duke@435:   // Initialization
duke@435:   static void reset()                       PRODUCT_RETURN;   // reset counters
duke@435: 
duke@435:   // Profile printing
duke@435:   static void print(float cutoff = 0.01F)   PRODUCT_RETURN;   // cutoff in percent
duke@435: };
stefank@2314: 
stefank@2314: #endif // SHARE_VM_INTERPRETER_BYTECODEHISTOGRAM_HPP