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hotspot/src/share/vm/interpreter/bytecodeHistogram.hpp

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+/*
+ * 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
+};