Mercurial > hg > truffle
diff src/share/vm/interpreter/bytecodeHistogram.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/interpreter/bytecodeHistogram.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,92 @@ +/* + * Copyright 1997-2004 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// BytecodeCounter counts the number of bytecodes executed + +class BytecodeCounter: AllStatic { + private: + NOT_PRODUCT(static int _counter_value;) + NOT_PRODUCT(static jlong _reset_time;) + + friend class TemplateInterpreterGenerator; + friend class BytecodeInterpreter; + + public: + // Initialization + static void reset() PRODUCT_RETURN; + + // Counter info (all info since last reset) + static int counter_value() PRODUCT_RETURN0 NOT_PRODUCT({ return _counter_value; }); + static double elapsed_time() PRODUCT_RETURN0; // in seconds + static double frequency() PRODUCT_RETURN0; // bytecodes/seconds + + // Counter printing + static void print() PRODUCT_RETURN; +}; + + +// BytecodeHistogram collects number of executions of bytecodes + +class BytecodeHistogram: AllStatic { + private: + NOT_PRODUCT(static int _counters[Bytecodes::number_of_codes];) // a counter for each bytecode + + friend class TemplateInterpreterGenerator; + friend class InterpreterGenerator; + friend class BytecodeInterpreter; + + public: + // Initialization + static void reset() PRODUCT_RETURN; // reset counters + + // Profile printing + static void print(float cutoff = 0.01F) PRODUCT_RETURN; // cutoff in percent +}; + + +// BytecodePairHistogram collects number of executions of bytecode pairs. +// A bytecode pair is any sequence of two consequtive bytecodes. + +class BytecodePairHistogram: AllStatic { + public: // for SparcWorks + enum Constants { + log2_number_of_codes = 8, // use a power of 2 for faster addressing + number_of_codes = 1 << log2_number_of_codes, // must be no less than Bytecodes::number_of_codes + number_of_pairs = number_of_codes * number_of_codes + }; + + private: + NOT_PRODUCT(static int _index;) // new bytecode is shifted in - used to index into _counters + NOT_PRODUCT(static int _counters[number_of_pairs];) // a counter for each pair + + friend class TemplateInterpreterGenerator; + friend class InterpreterGenerator; + + public: + // Initialization + static void reset() PRODUCT_RETURN; // reset counters + + // Profile printing + static void print(float cutoff = 0.01F) PRODUCT_RETURN; // cutoff in percent +};