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view graal/com.oracle.max.base/src/com/sun/max/util/timer/TimerMetric.java @ 4231:d713eaf4d288
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author | Christian Wimmer <Christian.Wimmer@Oracle.com> |
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date | Thu, 05 Jan 2012 16:09:47 -0800 |
parents | e233f5660da4 |
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/* * Copyright (c) 2008, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.max.util.timer; import java.io.*; import com.sun.max.profile.*; import com.sun.max.profile.Metrics.*; /** * This class implements a wrapper around a timer that collects statistics about the time intervals recorded. */ public class TimerMetric implements Timer, Metric { private final Timer timer; private int count; private long elapsed; private long nested; public TimerMetric(Timer timer) { this.timer = timer; } public void start() { timer.start(); } public void stop() { timer.stop(); synchronized (this) { count++; elapsed += timer.getLastElapsedTime(); nested += timer.getLastNestedTime(); } } public Clock getClock() { return timer.getClock(); } public long getLastElapsedTime() { return timer.getLastElapsedTime(); } public long getLastNestedTime() { return timer.getLastNestedTime(); } public synchronized void reset() { count = 0; elapsed = 0; nested = 0; } public long getElapsedTime() { return elapsed; } public long getNestedTime() { return nested; } public int getCount() { return count; } public synchronized void report(String name, PrintStream stream) { if (count > 0) { final long hz = timer.getClock().getHZ(); final long total = elapsed - nested; if (hz > 0) { // report in seconds final double secs = total / (double) hz; Metrics.report(stream, name, "total", "--", String.valueOf(secs), "seconds"); Metrics.report(stream, name, "average", "--", String.valueOf(secs / count), "seconds (" + count + " intervals)"); } else { // report in ticks Metrics.report(stream, name, "total", "--", String.valueOf(total), "ticks"); Metrics.report(stream, name, "average", "--", String.valueOf(total / (double) count), "ticks (" + count + " intervals)"); } } } }