jdk8-mips64-public/hotspot: src/share/vm/interpreter/bytecodeHistogram.hpp@11d5942ef9c7

     1 /*

     2  * Copyright (c) 1997, 2010, 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  */

    25 #ifndef SHARE_VM_INTERPRETER_BYTECODEHISTOGRAM_HPP

    26 #define SHARE_VM_INTERPRETER_BYTECODEHISTOGRAM_HPP

    28 #include "interpreter/bytecodes.hpp"

    29 #include "memory/allocation.hpp"

    31 // BytecodeCounter counts the number of bytecodes executed

    33 class BytecodeCounter: AllStatic {

    34  private:

    35   NOT_PRODUCT(static int   _counter_value;)

    36   NOT_PRODUCT(static jlong _reset_time;)

    38   friend class TemplateInterpreterGenerator;

    39   friend class         BytecodeInterpreter;

    41  public:

    42   // Initialization

    43   static void reset()                      PRODUCT_RETURN;

    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

    50   // Counter printing

    51   static void   print()                    PRODUCT_RETURN;

    52 };

    55 // BytecodeHistogram collects number of executions of bytecodes

    57 class BytecodeHistogram: AllStatic {

    58  private:

    59   NOT_PRODUCT(static int _counters[Bytecodes::number_of_codes];)   // a counter for each bytecode

    61   friend class TemplateInterpreterGenerator;

    62   friend class         InterpreterGenerator;

    63   friend class         BytecodeInterpreter;

    65  public:

    66   // Initialization

    67   static void reset()                       PRODUCT_RETURN; // reset counters

    69   // Profile printing

    70   static void print(float cutoff = 0.01F)   PRODUCT_RETURN; // cutoff in percent

    71 };

    74 // BytecodePairHistogram collects number of executions of bytecode pairs.

    75 // A bytecode pair is any sequence of two consequtive bytecodes.

    77 class BytecodePairHistogram: AllStatic {

    78  public: // for SparcWorks

    79   enum Constants {

    80     log2_number_of_codes = 8,                         // use a power of 2 for faster addressing

    81     number_of_codes      = 1 << log2_number_of_codes, // must be no less than Bytecodes::number_of_codes

    82     number_of_pairs      = number_of_codes * number_of_codes

    83   };

    85  private:

    86   NOT_PRODUCT(static int  _index;)                      // new bytecode is shifted in - used to index into _counters

    87   NOT_PRODUCT(static int  _counters[number_of_pairs];)  // a counter for each pair

    89   friend class TemplateInterpreterGenerator;

    90   friend class         InterpreterGenerator;

    92  public:

    93   // Initialization

    94   static void reset()                       PRODUCT_RETURN;   // reset counters

    96   // Profile printing

    97   static void print(float cutoff = 0.01F)   PRODUCT_RETURN;   // cutoff in percent

    98 };

   100 #endif // SHARE_VM_INTERPRETER_BYTECODEHISTOGRAM_HPP

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