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				-/* 
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				- * Copyright (C) 2010 Google Inc. 
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				- * 
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				- * Licensed under the Apache License, Version 2.0 (the "License"); 
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				- * you may not use this file except in compliance with the License. 
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				- * You may obtain a copy of the License at 
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				- * 
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				- *      http://www.apache.org/licenses/LICENSE-2.0 
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				- * 
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				- * Unless required by applicable law or agreed to in writing, software 
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				- * distributed under the License is distributed on an "AS IS" BASIS, 
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				- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
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				- * See the License for the specific language governing permissions and 
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				- * limitations under the License. 
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				- */ 
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				- 
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				-package com.google.protobuf; 
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				- 
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				-import java.util.Arrays; 
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				- 
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				-/** 
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				- * A Performance Timing class that can be used to estimate the amount of time a 
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				- * sequence of code takes. The typical code sequence would be as follows:</p> 
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				- * <code> 
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				- PerfTimer pt = new PerfTimer(); 
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				- pt.calibrate(); 
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				- pt.timeEachAutomatically(new Runnable() = { 
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				-    public void run() { 
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				-        // Add code to time 
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				-    } 
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				- }); 
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				- System.out.printf("time per loop=" + pt); 
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				- 
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				- * The calibrate method determines the overhead of timing the run() method and 
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				- * the number of times to call the run() method to have approximately 1% precision 
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				- * for timing. The method pt.stats() method will return a string containing some 
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				- * statistics tpl, il, ol, min, max, mean, median, stddev and total. 
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				- * 
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				- * tpl    ::= Timer per loop 
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				- * min    ::= minimum time one call to run() took 
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				- * stddev ::= Standard deviation of the collected times 
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				- * mean   ::= the average time to call run() 
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				- * median ::= 1/2 the times were > than this time and 1/2 were less. 
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				- * total  ::= Sum of the times collected. 
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				- * il     ::= innerLoops; the number of times run() between each call to start/stop 
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				- * ol     ::= outerLoops, the number of times start/stop was called 
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				- * 
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				- * You can also use start/stop/restart to do simple timing: 
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				- * 
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				- * pt.start(); 
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				- * a += 1; 
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				- * pt.stop(); 
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				- * pt.log("time=" + pt); 
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				- * pt.restart(); 
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				- * doSomething(); 
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				- * pt.stop(); 
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				- * System.out.printf("time=" + pt); 
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				- * </code> 
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				- * 
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				- * @author wink@google.com (Wink Saville) 
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				- */ 
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				-public class PerfTimer { 
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				-    /** No debug */ 
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				-    public static final int DEBUG_LEVEL_NONE = 0; 
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				- 
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				-    /** Some debug */ 
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				-    public static final int DEBUG_LEVEL_SOME = 1; 
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				- 
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				-    /** All debug */ 
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				-    public static final int DEBUG_LEVEL_ALL = 2; 
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				- 
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				-    /** Timer ticks per microsecond */ 
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				-    private static final double TICKS_PER_MICROSECOND = 1000.0; 
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				- 
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				-    /** Random number generator */ 
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				-    java.util.Random rng = new java.util.Random(); 
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				- 
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				-    /** get ticks */ 
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				-    private static long getTicks() { 
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				-        return System.nanoTime(); 
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				-    } 
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				- 
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				-    /** Debug logging */ 
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				-    private static void log(String s) { 
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				-        System.out.printf(String.format("[PerfTimer] %s\n", s)); 
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				-    } 
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				- 
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				-    /** Outer loops for timeEachAutomatically */ 
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				-    private static final int OUTER_LOOPS = 100; 
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				- 
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				-    /** Thrown if an error occurs while timing */ 
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				-    public static class PerfTimerException extends RuntimeException { 
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				-    } 
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				- 
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				-    /** 
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				-     * Calibration record 
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				-     */ 
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				-    public static class CalibrationRec { 
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				-        /** Runnable overhead */ 
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				-        public double mRunnableOverheadInMicros = 0.0; 
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				- 
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				-        /** Minimum Threshold value for timeEachAutomaticaly */ 
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				-        public double mMinThresholdInMicros = 3000.0; 
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				- 
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				-        /** Maximum Threshold value for timeEachAutomaticaly */ 
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				-        public double mMaxThresholdInMicros = 6000.0; 
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				- 
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				-        /** Desired precision in decimal digits */ 
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				-        public double mPrecisionInDecimalDigits = 2.0; 
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				- 
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				-        /** 
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				-         * Default number of retries if the standard deviation ratio is too 
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				-         * large 
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				-         */ 
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				-        public final int mStdDevRetrys = 5; 
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				- 
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				-        /** Default maximum standard deviation radio */ 
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				-        public final double mMaxStdDevRatio = 0.15; 
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				- 
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				-        /** Number of votes looking for smallest time per loop */ 
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				-        public final int mVotes = 3; 
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				- 
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				-        /** Convert to string */ 
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				-        @Override 
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				-        public String toString() { 
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				-            return String 
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				-                    .format( 
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				-                            "oh=%.6fus minT=%.6fus maxT=%.6fus prc=%,.3f stdDevRetrys=%d maxStdDevRatio=%.2f votes=%d", 
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				-                            mRunnableOverheadInMicros, mMinThresholdInMicros, 
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				-                            mMaxThresholdInMicros, mPrecisionInDecimalDigits, mStdDevRetrys, 
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				-                            mMaxStdDevRatio, mVotes); 
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				-        } 
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				-    } 
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				- 
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				-    /** 
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				-     * Calibration record 
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				-     */ 
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				-    private CalibrationRec mCr; 
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				- 
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				-    /** 
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				-     * Statistics calculated on the timing data. 
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				-     */ 
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				-    public static class Stats { 
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				-        /** Number of outer loops */ 
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				-        private int mOuterLoops; 
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				- 
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				-        /** Number of inner loops */ 
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				-        private int mInnerLoops; 
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				- 
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				-        /** Minimum time in times array */ 
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				-        private long mMin; 
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				- 
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				-        /** Maximum time in times array */ 
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				-        private long mMax; 
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				- 
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				-        /** Median value in times array */ 
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				-        private double mMedian; 
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				- 
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				-        /** The mean (average) of the values in times array */ 
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				-        private double mMean; 
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				- 
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				-        /** The standard deviation of the values in times array */ 
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				-        private double mStdDev; 
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				- 
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				-        private int mStdDevTooLargeCount; 
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				- 
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				-        /** Sum of the times in the times array */ 
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				-        private double mTotal; 
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				- 
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				-        /** Initialize */ 
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				-        public void init() { 
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				-            mInnerLoops = 1; 
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				-            mOuterLoops = 1; 
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				-            mMin = 0; 
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				-            mMax = 0; 
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				-            mMedian = 0; 
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				-            mMean = 0; 
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				-            mStdDev = 0; 
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				-            mStdDevTooLargeCount = 0; 
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				-            mTotal = 0; 
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				-        } 
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				- 
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				-        /** Constructor */ 
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				-        public Stats() { 
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				-            init(); 
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				-        } 
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				- 
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				-        /** Set number of inner loops */ 
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				-        public void setInnerLoops(int loops) { 
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				-            mInnerLoops = loops; 
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				-        } 
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				- 
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				-        /** Get number of inner loops */ 
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				-        public int getInnerLoops() { 
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				-            return mInnerLoops; 
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				-        } 
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				- 
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				-        /** Set number of inner loops */ 
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				-        public void setOuterLoops(int loops) { 
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				-            mOuterLoops = loops; 
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				-        } 
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				- 
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				-        /** Get number of inner loops */ 
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				-        public int getOuterLoops() { 
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				-            return mOuterLoops; 
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				-        } 
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				- 
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				-        /** 
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				-         * Minimum value of collected data in microseconds, valid after analyze. 
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				-         */ 
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				-        public double getMinInMicros() { 
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				-            return mMin / TICKS_PER_MICROSECOND; 
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				-        } 
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				- 
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				-        /** 
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				-         * Maximum value of collected data in microseconds, valid after analyze. 
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				-         */ 
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				-        public double getMaxInMicros() { 
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				-            return mMax / TICKS_PER_MICROSECOND; 
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				-        } 
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				- 
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				-        /** 
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				-         * Sum of the values of collected data in microseconds, valid after 
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				-         * analyze. 
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				-         */ 
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				-        public double getTotalInMicros() { 
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				-            return mTotal / TICKS_PER_MICROSECOND; 
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				-        } 
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				- 
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				-        /** Sum of the values of collected data in seconds, valid after analyze. */ 
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				-        public double getTotalInSecs() { 
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				-            return mTotal / (TICKS_PER_MICROSECOND * 1000000.0); 
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				-        } 
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				- 
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				-        /** Sum of the values of collected data in seconds, valid after analyze. */ 
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				-        public double getMeanInMicros() { 
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				-            return mMean / TICKS_PER_MICROSECOND; 
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				-        } 
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				- 
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				-        /** Median value of collected data in microseconds, valid after analyze. */ 
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				-        public double getMedianInMicros() { 
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				-            return mMedian / TICKS_PER_MICROSECOND; 
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				-        } 
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				- 
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				-        /** 
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				-         * Standard deviation of collected data in microseconds, valid after 
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				-         * analyze. 
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				-         */ 
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				-        public double getStdDevInMicros() { 
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				-            return mStdDev / TICKS_PER_MICROSECOND; 
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				-        } 
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				- 
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				-        public double getStdDevRatio() { 
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				-            return mStdDev / mMin; 
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				-        } 
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				- 
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				-        /** Return true if (mStdDev / mMin) <= maxStdDevRation */ 
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				-        public boolean stdDevOk(double maxStdDevRatio) { 
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				-            return getStdDevRatio() <= maxStdDevRatio; 
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				-        } 
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				- 
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				-        /** Increment StdDevTooLargeCount */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        public void incStdDevTooLargeCount() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            mStdDevTooLargeCount += 1; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        /** Return number of times stdDev was not ok */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        public int getStdDevTooLargeCount() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            return mStdDevTooLargeCount; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        /** Return time per loop */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        public double getTimePerLoop() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                return mMin / TICKS_PER_MICROSECOND / mInnerLoops; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-         * Calculate the stats for the data. Note the data in the range will be 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-         * sorted. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-         * 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-         * @param data 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-         * @param count 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-         */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        public Stats calculate(long data[], int count) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            if (count == 1) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                mMin = mMax = data[0]; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                mTotal = mMedian = mMean = data[0]; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                mStdDev = 0; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } else if (count > 1) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                Arrays.sort(data, 0, count); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                mMin = data[0]; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                mMax = data[count - 1]; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                if ((count & 1) == 1) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    mMedian = data[((count + 1) / 2) - 1]; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                } else { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    mMedian = (data[count / 2] + data[(count / 2) - 1]) / 2; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                mTotal = 0; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                double sumSquares = 0; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                for (int i = 0; i < count; i++) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    long t = data[i]; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    mTotal += t; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    sumSquares += t * t; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                mMean = mTotal / count; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                double variance = (sumSquares / count) - (mMean * mMean); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                mStdDev = Math.pow(variance, 0.5); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } else { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                init(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            return this; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        /** Convert to string */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        @Override 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            public String toString() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                double timePerLoop = getTimePerLoop(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                double stdDevPerLoop = mStdDev / TICKS_PER_MICROSECOND / mInnerLoops; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                return String.format( 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        "tpl=%,.6fus stdDev=%,.6fus tpl/stdDev=%.2fpercent min=%,.6fus median=%,.6fus mean=%,.6fus max=%,.6fus total=%,.6fs il=%d, ol=%d tlc=%d", 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        timePerLoop, stdDevPerLoop, (stdDevPerLoop / timePerLoop) * 100, mMin 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        / TICKS_PER_MICROSECOND, mMedian / TICKS_PER_MICROSECOND, mMean 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        / TICKS_PER_MICROSECOND, mMax / TICKS_PER_MICROSECOND, mTotal 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        / (TICKS_PER_MICROSECOND * 1000000.0), mInnerLoops, mOuterLoops, mStdDevTooLargeCount); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Statistics */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    private Stats mStats = new Stats(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Statistics of the clock precision */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    private Stats mClockStats; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Number of items in times array */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    private int mCount; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Array of stop - start times */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    private long mTimes[]; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Time of last started */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    private long mStart; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Sleep a little so we don't look like a hog */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    private void sleep() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        try { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            Thread.sleep(0); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } catch (InterruptedException e) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            // Ignore exception 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Empty Runnable used for determining overhead */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    private Runnable mEmptyRunnable = new Runnable() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        public void run() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    }; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Initialize */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    private void init(int maxCount, CalibrationRec cr) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        mTimes = new long[maxCount]; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        mCr = cr; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        reset(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Construct the stop watch */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public PerfTimer() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        init(10, new CalibrationRec()); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Construct setting size of times array */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public PerfTimer(int maxCount) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        init(maxCount, new CalibrationRec()); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Construct the stop watch */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public PerfTimer(CalibrationRec cr) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        init(10, cr); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Construct the stop watch */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public PerfTimer(int maxCount, CalibrationRec cr) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        init(maxCount, cr); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Reset the contents of the times array */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public PerfTimer reset() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        mCount = 0; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        mStats.init(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return this; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Reset and then start the timer */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public PerfTimer restart() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        reset(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        mStart = getTicks(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return this; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Start timing */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public PerfTimer start() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        mStart = getTicks(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return this; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Record the difference between start and now in the times array 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * incrementing count. The time will be stored in the times array if the 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * array is not full. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public PerfTimer stop() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        long stop = getTicks(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        if (mCount < mTimes.length) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            mTimes[mCount++] = stop - mStart; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return this; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Time how long it takes to execute runnable.run() innerLoop number of 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * times outerLoops number of times. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param outerLoops 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param innerLoops 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param runnable 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @return PerfTimer 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public PerfTimer timeEach(Stats stats, int outerLoops, int innerLoops, Runnable runnable) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        reset(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        resize(outerLoops); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        stats.setOuterLoops(outerLoops); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        stats.setInnerLoops(innerLoops); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        for (int i = 0; i < outerLoops; i++) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            start(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            for (int j = 0; j < innerLoops; j++) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                runnable.run(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            stop(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            sleep(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return this; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Time how long it takes to execute runnable.run(). Runs runnable votes 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * times and returns the Stats of the fastest run. The actual number times 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * that runnable.run() is executes is enough times so that it runs at least 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * minThreadholeInMicros but not greater than maxThreadholdInMicro. This 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * minimizes the chance that long context switches influence the result. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param votes is the number of runnable will be executed to determine 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     *            fastest run 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param outerLoops is the number of of times the inner loop is run 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param initialInnerLoops is the initial inner loop 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param maxStdDevRetrys if the maxStdDevRatio is exceeded this number of 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     *            time the PerfTimerException is thrown. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param maxStdDevRatio the ratio of the standard deviation of the run and 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     *            the time to run. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param debugLevel DEBUG_LEVEL_NONE, DEBUG_LEVEL_SOME, DEBUG_LEVEL_ALL 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param runnable is the code to test. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @return Stats of the fastest run. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public Stats timeEachAutomatically(int votes, int outerLoops, int initialInnerLoops, 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            double minThresholdInMicros, double maxThresholdInMicros, int maxStdDevRetrys, 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            double maxStdDevRatio, int debugLevel, Runnable runnable) throws PerfTimerException { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        Stats minStats = null; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        for (int v = 0; v < votes; v++) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            boolean successful = false; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            Stats stats = new Stats(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            int innerLoops = initialInnerLoops; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            /* Warm up cache */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            timeEach(stats, outerLoops, initialInnerLoops, runnable); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            for (int stdDevRetrys = 0; stdDevRetrys < maxStdDevRetrys; stdDevRetrys++) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                 * First time may be long enough 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                 */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                timeEach(stats, outerLoops, innerLoops, runnable); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                analyze(stats, mTimes, outerLoops, debugLevel); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                double innerLoopTime = stats.getMinInMicros(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                if ((innerLoopTime >= minThresholdInMicros 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        - ((maxThresholdInMicros - minThresholdInMicros) / 2))) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    if (stats.stdDevOk(maxStdDevRatio)) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        successful = true; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        break; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    } else { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        stats.incStdDevTooLargeCount(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        if (debugLevel >= DEBUG_LEVEL_SOME) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            log(String.format( 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                    "tea: tlc=%d StdDevRatio=%.2f > maxStdDevRatio=%.2f", 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                    stats.getStdDevTooLargeCount(), stats.getStdDevRatio(), 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                    maxStdDevRatio)); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                } else { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                     * The initial number of loops is too short find the number 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                     * of loops that exceeds maxThresholdInMicros. Then use a 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                     * binary search to find the approriate innerLoop value that 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                     * is between min/maxThreshold. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    innerLoops *= 10; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    int maxInnerLoops = innerLoops; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    int minInnerLoops = 1; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    boolean binarySearch = false; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    for (int i = 0; i < 10; i++) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        timeEach(stats, outerLoops, innerLoops, runnable); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        analyze(stats, mTimes, outerLoops, debugLevel); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        innerLoopTime = stats.getMedianInMicros(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        if ((innerLoopTime >= minThresholdInMicros) 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                && (innerLoopTime <= maxThresholdInMicros)) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            if (stats.stdDevOk(maxStdDevRatio)) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                successful = true; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                break; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            } else { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                stats.incStdDevTooLargeCount(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                if (debugLevel >= DEBUG_LEVEL_SOME) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                    log(String.format( 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                         "tea: tlc=%d StdDevRatio=%.2f > maxStdDevRatio=%.2f", 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                         stats.getStdDevTooLargeCount(), stats.getStdDevRatio(), 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                         maxStdDevRatio)); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        } else if (binarySearch) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            if ((innerLoopTime < minThresholdInMicros)) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                minInnerLoops = innerLoops; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            } else { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                                maxInnerLoops = innerLoops; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            innerLoops = (maxInnerLoops + minInnerLoops) / 2; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        } else if (innerLoopTime >= maxThresholdInMicros) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            /* Found a too large value, change to binary search */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            binarySearch = true; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            maxInnerLoops = innerLoops; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            innerLoops = (maxInnerLoops + minInnerLoops) / 2; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        } else { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                            innerLoops *= 10; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    if (successful) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        break; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            if (!successful) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                /* Couldn't find the number of loops to execute */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                throw new PerfTimerException(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            /** Looking for minimum */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            if ((minStats == null) || (minStats.getTimePerLoop() > stats.getTimePerLoop())) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                minStats = stats; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            if (debugLevel >= DEBUG_LEVEL_SOME) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                log(String.format("minStats.getTimePerLoop=%f minStats: %s", minStats.getTimePerLoop(), minStats)); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return minStats; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Time how long it takes to execute runnable.run() with a threshold of 1 to 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * 10ms. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param debugLevel DEBUG_LEVEL_NONE, DEBUG_LEVEL_SOME, DEBUG_LEVEL_ALL 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param runnable 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @throws PerfTimerException 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public Stats timeEachAutomatically(int debugLevel, Runnable runnable) 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            throws PerfTimerException { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        mStats = timeEachAutomatically(mCr.mVotes, OUTER_LOOPS, 1, mCr.mMinThresholdInMicros, 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                mCr.mMaxThresholdInMicros, mCr.mStdDevRetrys, mCr.mMaxStdDevRatio, debugLevel, 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                runnable); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mStats; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Time how long it takes to execute runnable.run() with a threshold of 1 to 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * 10ms. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param runnable 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @throws PerfTimerException 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public Stats timeEachAutomatically(Runnable runnable) throws PerfTimerException { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        mStats = timeEachAutomatically(mCr.mVotes, OUTER_LOOPS, 1, mCr.mMinThresholdInMicros, 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                mCr.mMaxThresholdInMicros, mCr.mStdDevRetrys, mCr.mMaxStdDevRatio, 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                DEBUG_LEVEL_NONE, runnable); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mStats; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Resize the times array */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public void resize(int maxCount) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        if (maxCount > mTimes.length) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            mTimes = new long[maxCount]; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Analyze the data calculating the min, max, total, median, mean and 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * stdDev. The standard deviation is calculated as sqrt(((sum of the squares 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * of each time) / count) - mean^2) 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * {@link "http://www.sciencebuddies.org/mentoring/project_data_analysis_variance_std_deviation.shtml"} 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param debugLevel DEBUG_LEVEL_NONE, DEBUG_LEVEL_SOME, DEBUG_LEVEL_ALL 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @return StopWatch 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public Stats analyze(Stats stats, long data[], int count, int debugLevel) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        if (count > 0) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            if (debugLevel >= DEBUG_LEVEL_ALL) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                for (int j = 0; j < count; j++) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    log(String.format("data[%d]=%,dns", j, data[j])); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            stats.calculate(data, count); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } else { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            stats.init(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        if (debugLevel >= DEBUG_LEVEL_SOME) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            log("stats: " + stats); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return stats; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Calibrate the system and set it for this PerfTimer instance 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param debugLevel DEBUG_LEVEL_NONE, DEBUG_LEVEL_SOME, DEBUG_LEVEL_ALL 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param precisionInDecimalDigits the precision in number of decimal digits 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public CalibrationRec calibrate(int debugLevel, double precisionInDecimalDigits) 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            throws PerfTimerException { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        int nonZeroCount = 0; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        Stats stats = new Stats(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        CalibrationRec cr = new CalibrationRec(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        /* initialize the precision */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        cr.mPrecisionInDecimalDigits = precisionInDecimalDigits; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        /* Warm up the cache */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        timeEach(stats, OUTER_LOOPS, 10, mEmptyRunnable); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        /* 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-         * Determine the clock stats with at least 20% non-zero unique values. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-         */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        for (int clockStatsTries = 1; clockStatsTries < 100; clockStatsTries++) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            int j; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            int i; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            long cur; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            long prev; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            long min; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            int innerLoops = clockStatsTries * 10; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            timeEach(stats, OUTER_LOOPS, innerLoops, mEmptyRunnable); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            long nonZeroValues[] = new long[mCount]; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            prev = 0; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            for (nonZeroCount = 0, i = 0; i < mCount; i++) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                cur = mTimes[i]; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                if (cur > 0) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    nonZeroValues[nonZeroCount++] = cur; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            if (nonZeroCount > (mCount * 0.20)) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                // Calculate thresholds 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                analyze(stats, nonZeroValues, nonZeroCount, debugLevel); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                stats.calculate(nonZeroValues, nonZeroCount); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                cr.mMinThresholdInMicros = stats.getMeanInMicros() 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        * Math.pow(10, cr.mPrecisionInDecimalDigits); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                cr.mMaxThresholdInMicros = cr.mMinThresholdInMicros * 2; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                // Set overhead to 0 and time the empty loop then set overhead. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                cr.mRunnableOverheadInMicros = 0; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                mClockStats = timeEachAutomatically(mCr.mVotes, OUTER_LOOPS, innerLoops, 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        cr.mMinThresholdInMicros, cr.mMaxThresholdInMicros, mCr.mStdDevRetrys, 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        mCr.mMaxStdDevRatio, debugLevel, mEmptyRunnable); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                cr.mRunnableOverheadInMicros = mClockStats.getMinInMicros() 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                        / mClockStats.getInnerLoops(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                break; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            nonZeroCount = 0; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        if (nonZeroCount == 0) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            throw new PerfTimerException(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        if (debugLevel >= DEBUG_LEVEL_SOME) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            log(String.format("calibrate X oh=%.6fus minT=%,.6fus maxT=%,.6fus stats: %s", 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    cr.mRunnableOverheadInMicros, cr.mMinThresholdInMicros, 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                    cr.mMaxThresholdInMicros, stats)); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        mCr = cr; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mCr; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Calibrate the system and set it for this PerfTimer instance */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public CalibrationRec calibrate(double precisionInDecimalDigits) throws PerfTimerException { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return calibrate(DEBUG_LEVEL_NONE, precisionInDecimalDigits); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Calibrate the system and set it for this PerfTimer instance */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public CalibrationRec calibrate() throws PerfTimerException { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return calibrate(DEBUG_LEVEL_NONE, mCr.mPrecisionInDecimalDigits); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /* 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Accessors for the private data 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Set calibration record */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public void setCalibrationRec(CalibrationRec cr) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        mCr = cr; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Get calibration record */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public CalibrationRec getCalibrationRec() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mCr; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Number of samples in times array. */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public int getCount() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mCount; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Minimum value of collected data in microseconds, valid after analyze. */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public double getMinInMicros() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mStats.getMinInMicros(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Maximum value of collected data in microseconds, valid after analyze. */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public double getMaxInMicros() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mStats.getMaxInMicros(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Sum of the values of collected data in microseconds, valid after analyze. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public double getTotalInMicros() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mStats.getTotalInMicros(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Sum of the values of collected data in seconds, valid after analyze. */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public double getTotalInSecs() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mStats.getTotalInSecs(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Sum of the values of collected data in seconds, valid after analyze. */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public double getMeanInMicros() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mStats.getMeanInMicros(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Median value of collected data in microseconds, valid after analyze. */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public double getMedianInMicros() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mStats.getMedianInMicros(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Standard deviation of collected data in microseconds, valid after 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * analyze. 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public double getStdDevInMicros() { 
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				 | 
				 | 
			
			
				-        return mStats.getStdDevInMicros(); 
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				 | 
				 | 
			
			
				-    } 
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				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** The mTimes[index] value */ 
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				 | 
				 | 
			
			
				-    public long getTime(int index) { 
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				 | 
				 | 
			
			
				-        return mTimes[index]; 
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				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** The mTimes */ 
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				 | 
				 | 
			
			
				-    public long[] getTimes() { 
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				 | 
				 | 
			
			
				-        return mTimes; 
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				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** @return the clock stats as measured in calibrate */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public Stats getClockStats() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mClockStats; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** @return the stats */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public Stats getStats() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return mStats; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Convert stats to string 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * @param debugLevel DEBUG_LEVEL_NONE, DEBUG_LEVEL_SOME, DEBUG_LEVEL_ALL 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public String stats(int debugLevel) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        int innerLoops = mStats.getInnerLoops(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        if (mCount == 0) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            return String.format("%,.3fus", (getTicks() - mStart) / TICKS_PER_MICROSECOND); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } else { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            if (mCount == 1) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                return String.format("%,.3fus", getTime()); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } else { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                analyze(mStats, mTimes, mCount, debugLevel); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                return mStats.toString(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Convert string 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public String stats() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return stats(0); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     * Get time 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-     */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public double getTime() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        int innerLoops = mStats.getInnerLoops(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        if (mCount == 0) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            return (getTicks() - mStart) / TICKS_PER_MICROSECOND; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } else { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            if (mCount == 1) { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                return mStats.getTotalInMicros(); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } else { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                analyze(mStats, mTimes, mCount, DEBUG_LEVEL_NONE); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-                return (mStats.getMinInMicros() / innerLoops) - mCr.mRunnableOverheadInMicros; 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-            } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				- 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    /** Convert to string */ 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    @Override 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    public String toString() { 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-        return String.format("%,.3fus", getTime()); 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-    } 
			 | 
		
	
		
			
				 | 
				 | 
			
			
				-} 
			 |