--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/runtime/timer.hpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,121 @@
+/*
+ * Copyright 1997-2006 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.
+ *
+ */
+
+// Timers for simple measurement.
+
+class elapsedTimer VALUE_OBJ_CLASS_SPEC {
+ friend class VMStructs;
+ private:
+ jlong _counter;
+ jlong _start_counter;
+ bool _active;
+ public:
+ elapsedTimer() { _active = false; reset(); }
+ void add(elapsedTimer t);
+ void start();
+ void stop();
+ void reset() { _counter = 0; }
+ double seconds() const;
+ jlong milliseconds() const;
+ jlong ticks() const { return _counter; }
+ jlong active_ticks() const;
+ bool is_active() const { return _active; }
+};
+
+// TimeStamp is used for recording when an event took place.
+class TimeStamp VALUE_OBJ_CLASS_SPEC {
+ private:
+ jlong _counter;
+ public:
+ TimeStamp() { _counter = 0; }
+ void clear() { _counter = 0; }
+ // has the timestamp been updated since being created or cleared?
+ bool is_updated() const { return _counter != 0; }
+ // update to current elapsed time
+ void update();
+ // update to given elapsed time
+ void update_to(jlong ticks);
+ // returns seconds since updated
+ // (must not be in a cleared state: must have been previously updated)
+ double seconds() const;
+ jlong milliseconds() const;
+ // ticks elapsed between VM start and last update
+ jlong ticks() const { return _counter; }
+ // ticks elapsed since last update
+ jlong ticks_since_update() const;
+};
+
+// TraceTime is used for tracing the execution time of a block
+// Usage:
+// { TraceTime t("block time")
+// some_code();
+// }
+//
+
+class TraceTime: public StackObj {
+ private:
+ bool _active; // do timing
+ bool _verbose; // report every timing
+ bool _print_cr; // add a CR to the end of the timer report
+ elapsedTimer _t; // timer
+ elapsedTimer* _accum; // accumulator
+ outputStream* _logfile; // output log file
+ public:
+ // Constuctors
+ TraceTime(const char* title,
+ bool doit = true,
+ bool print_cr = true,
+ outputStream *logfile = NULL);
+ TraceTime(const char* title,
+ elapsedTimer* accumulator,
+ bool doit = true,
+ bool verbose = false,
+ outputStream *logfile = NULL );
+ ~TraceTime();
+
+ // Accessors
+ void set_verbose(bool verbose) { _verbose = verbose; }
+ bool verbose() const { return _verbose; }
+
+ // Activation
+ void suspend() { if (_active) _t.stop(); }
+ void resume() { if (_active) _t.start(); }
+};
+
+class TraceCPUTime: public StackObj {
+ private:
+ bool _active; // true if times will be measured and printed
+ bool _print_cr; // if true print carriage return at end
+ double _starting_user_time; // user time at start of measurement
+ double _starting_system_time; // system time at start of measurement
+ double _starting_real_time; // real time at start of measurement
+ outputStream* _logfile; // output is printed to this stream
+ bool _error; // true if an error occurred, turns off output
+
+ public:
+ TraceCPUTime(bool doit = true,
+ bool print_cr = true,
+ outputStream *logfile = NULL);
+ ~TraceCPUTime();
+};