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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.metrics.impl;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.util.Arrays;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.concurrent.atomic.AtomicLong;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.concurrent.atomic.LongAdder;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.stream.Stream;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.metrics.Snapshot;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.util.AtomicUtils;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.yetus.audience.InterfaceStability;</span> |
| <span class="source-line-no">028</span><span id="line-28"></span> |
| <span class="source-line-no">029</span><span id="line-29">/**</span> |
| <span class="source-line-no">030</span><span id="line-30"> * FastLongHistogram is a thread-safe class that estimate distribution of data and computes the</span> |
| <span class="source-line-no">031</span><span id="line-31"> * quantiles.</span> |
| <span class="source-line-no">032</span><span id="line-32"> */</span> |
| <span class="source-line-no">033</span><span id="line-33">@InterfaceAudience.Private</span> |
| <span class="source-line-no">034</span><span id="line-34">@InterfaceStability.Evolving</span> |
| <span class="source-line-no">035</span><span id="line-35">public class FastLongHistogram {</span> |
| <span class="source-line-no">036</span><span id="line-36"></span> |
| <span class="source-line-no">037</span><span id="line-37"> /**</span> |
| <span class="source-line-no">038</span><span id="line-38"> * Default number of bins.</span> |
| <span class="source-line-no">039</span><span id="line-39"> */</span> |
| <span class="source-line-no">040</span><span id="line-40"> public static final int DEFAULT_NBINS = 255;</span> |
| <span class="source-line-no">041</span><span id="line-41"></span> |
| <span class="source-line-no">042</span><span id="line-42"> public static final double[] DEFAULT_QUANTILES =</span> |
| <span class="source-line-no">043</span><span id="line-43"> new double[] { 0.25, 0.5, 0.75, 0.90, 0.95, 0.98, 0.99, 0.999 };</span> |
| <span class="source-line-no">044</span><span id="line-44"></span> |
| <span class="source-line-no">045</span><span id="line-45"> /**</span> |
| <span class="source-line-no">046</span><span id="line-46"> * Bins is a class containing a list of buckets(or bins) for estimation histogram of some data.</span> |
| <span class="source-line-no">047</span><span id="line-47"> */</span> |
| <span class="source-line-no">048</span><span id="line-48"> private static class Bins {</span> |
| <span class="source-line-no">049</span><span id="line-49"></span> |
| <span class="source-line-no">050</span><span id="line-50"> private final LongAdder[] counts;</span> |
| <span class="source-line-no">051</span><span id="line-51"> // inclusive</span> |
| <span class="source-line-no">052</span><span id="line-52"> private final long binsMin;</span> |
| <span class="source-line-no">053</span><span id="line-53"> // exclusive</span> |
| <span class="source-line-no">054</span><span id="line-54"> private final long binsMax;</span> |
| <span class="source-line-no">055</span><span id="line-55"> private final long bins10XMax;</span> |
| <span class="source-line-no">056</span><span id="line-56"> private final AtomicLong min = new AtomicLong(Long.MAX_VALUE);</span> |
| <span class="source-line-no">057</span><span id="line-57"> private final AtomicLong max = new AtomicLong(0L);</span> |
| <span class="source-line-no">058</span><span id="line-58"></span> |
| <span class="source-line-no">059</span><span id="line-59"> private final LongAdder count = new LongAdder();</span> |
| <span class="source-line-no">060</span><span id="line-60"> private final LongAdder total = new LongAdder();</span> |
| <span class="source-line-no">061</span><span id="line-61"></span> |
| <span class="source-line-no">062</span><span id="line-62"> // set to true when any of data has been inserted to the Bins. It is set after the counts are</span> |
| <span class="source-line-no">063</span><span id="line-63"> // updated.</span> |
| <span class="source-line-no">064</span><span id="line-64"> private volatile boolean hasData = false;</span> |
| <span class="source-line-no">065</span><span id="line-65"></span> |
| <span class="source-line-no">066</span><span id="line-66"> /**</span> |
| <span class="source-line-no">067</span><span id="line-67"> * The constructor for creating a Bins without any prior data.</span> |
| <span class="source-line-no">068</span><span id="line-68"> */</span> |
| <span class="source-line-no">069</span><span id="line-69"> public Bins(int numBins) {</span> |
| <span class="source-line-no">070</span><span id="line-70"> counts = createCounters(numBins);</span> |
| <span class="source-line-no">071</span><span id="line-71"> this.binsMin = 1L;</span> |
| <span class="source-line-no">072</span><span id="line-72"></span> |
| <span class="source-line-no">073</span><span id="line-73"> // These two numbers are total guesses</span> |
| <span class="source-line-no">074</span><span id="line-74"> // and should be treated as highly suspect.</span> |
| <span class="source-line-no">075</span><span id="line-75"> this.binsMax = 1000;</span> |
| <span class="source-line-no">076</span><span id="line-76"> this.bins10XMax = binsMax * 10;</span> |
| <span class="source-line-no">077</span><span id="line-77"> }</span> |
| <span class="source-line-no">078</span><span id="line-78"></span> |
| <span class="source-line-no">079</span><span id="line-79"> /**</span> |
| <span class="source-line-no">080</span><span id="line-80"> * The constructor for creating a Bins with last Bins.</span> |
| <span class="source-line-no">081</span><span id="line-81"> */</span> |
| <span class="source-line-no">082</span><span id="line-82"> public Bins(Bins last, int numBins, double minQ, double maxQ) {</span> |
| <span class="source-line-no">083</span><span id="line-83"> long[] values = last.getQuantiles(new double[] { minQ, maxQ });</span> |
| <span class="source-line-no">084</span><span id="line-84"> long wd = values[1] - values[0] + 1;</span> |
| <span class="source-line-no">085</span><span id="line-85"> // expand minQ and maxQ in two ends back assuming uniform distribution</span> |
| <span class="source-line-no">086</span><span id="line-86"> this.binsMin = Math.max(0L, (long) (values[0] - wd * minQ));</span> |
| <span class="source-line-no">087</span><span id="line-87"> long binsMax = (long) (values[1] + wd * (1 - maxQ)) + 1;</span> |
| <span class="source-line-no">088</span><span id="line-88"> // make sure each of bins is at least of width 1</span> |
| <span class="source-line-no">089</span><span id="line-89"> this.binsMax = Math.max(binsMax, this.binsMin + numBins);</span> |
| <span class="source-line-no">090</span><span id="line-90"> this.bins10XMax = Math.max((long) (values[1] + (binsMax - 1) * 9), this.binsMax + 1);</span> |
| <span class="source-line-no">091</span><span id="line-91"></span> |
| <span class="source-line-no">092</span><span id="line-92"> this.counts = createCounters(numBins);</span> |
| <span class="source-line-no">093</span><span id="line-93"> }</span> |
| <span class="source-line-no">094</span><span id="line-94"></span> |
| <span class="source-line-no">095</span><span id="line-95"> private LongAdder[] createCounters(int numBins) {</span> |
| <span class="source-line-no">096</span><span id="line-96"> return Stream.generate(LongAdder::new).limit(numBins + 3).toArray(LongAdder[]::new);</span> |
| <span class="source-line-no">097</span><span id="line-97"> }</span> |
| <span class="source-line-no">098</span><span id="line-98"></span> |
| <span class="source-line-no">099</span><span id="line-99"> private int getIndex(long value) {</span> |
| <span class="source-line-no">100</span><span id="line-100"> if (value < this.binsMin) {</span> |
| <span class="source-line-no">101</span><span id="line-101"> return 0;</span> |
| <span class="source-line-no">102</span><span id="line-102"> } else if (value > this.bins10XMax) {</span> |
| <span class="source-line-no">103</span><span id="line-103"> return this.counts.length - 1;</span> |
| <span class="source-line-no">104</span><span id="line-104"> } else if (value >= this.binsMax) {</span> |
| <span class="source-line-no">105</span><span id="line-105"> return this.counts.length - 2;</span> |
| <span class="source-line-no">106</span><span id="line-106"> }</span> |
| <span class="source-line-no">107</span><span id="line-107"> // compute the position</span> |
| <span class="source-line-no">108</span><span id="line-108"> return 1</span> |
| <span class="source-line-no">109</span><span id="line-109"> + (int) ((value - this.binsMin) * (this.counts.length - 3) / (this.binsMax - this.binsMin));</span> |
| <span class="source-line-no">110</span><span id="line-110"></span> |
| <span class="source-line-no">111</span><span id="line-111"> }</span> |
| <span class="source-line-no">112</span><span id="line-112"></span> |
| <span class="source-line-no">113</span><span id="line-113"> /**</span> |
| <span class="source-line-no">114</span><span id="line-114"> * Adds a value to the histogram.</span> |
| <span class="source-line-no">115</span><span id="line-115"> */</span> |
| <span class="source-line-no">116</span><span id="line-116"> public void add(long value, long count) {</span> |
| <span class="source-line-no">117</span><span id="line-117"> if (value < 0) {</span> |
| <span class="source-line-no">118</span><span id="line-118"> // The whole computation is completely thrown off if there are negative numbers</span> |
| <span class="source-line-no">119</span><span id="line-119"> //</span> |
| <span class="source-line-no">120</span><span id="line-120"> // Normally we would throw an IllegalArgumentException however this is the metrics</span> |
| <span class="source-line-no">121</span><span id="line-121"> // system and it should be completely safe at all times.</span> |
| <span class="source-line-no">122</span><span id="line-122"> // So silently throw it away.</span> |
| <span class="source-line-no">123</span><span id="line-123"> return;</span> |
| <span class="source-line-no">124</span><span id="line-124"> }</span> |
| <span class="source-line-no">125</span><span id="line-125"> AtomicUtils.updateMin(min, value);</span> |
| <span class="source-line-no">126</span><span id="line-126"> AtomicUtils.updateMax(max, value);</span> |
| <span class="source-line-no">127</span><span id="line-127"></span> |
| <span class="source-line-no">128</span><span id="line-128"> this.count.add(count);</span> |
| <span class="source-line-no">129</span><span id="line-129"> this.total.add(value * count);</span> |
| <span class="source-line-no">130</span><span id="line-130"></span> |
| <span class="source-line-no">131</span><span id="line-131"> int pos = getIndex(value);</span> |
| <span class="source-line-no">132</span><span id="line-132"> this.counts[pos].add(count);</span> |
| <span class="source-line-no">133</span><span id="line-133"></span> |
| <span class="source-line-no">134</span><span id="line-134"> // hasData needs to be updated as last</span> |
| <span class="source-line-no">135</span><span id="line-135"> this.hasData = true;</span> |
| <span class="source-line-no">136</span><span id="line-136"> }</span> |
| <span class="source-line-no">137</span><span id="line-137"></span> |
| <span class="source-line-no">138</span><span id="line-138"> /**</span> |
| <span class="source-line-no">139</span><span id="line-139"> * Computes the quantiles give the ratios.</span> |
| <span class="source-line-no">140</span><span id="line-140"> */</span> |
| <span class="source-line-no">141</span><span id="line-141"> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "FL_FLOATS_AS_LOOP_COUNTERS",</span> |
| <span class="source-line-no">142</span><span id="line-142"> justification = "valid usage")</span> |
| <span class="source-line-no">143</span><span id="line-143"> public long[] getQuantiles(double[] quantiles) {</span> |
| <span class="source-line-no">144</span><span id="line-144"> if (!hasData) {</span> |
| <span class="source-line-no">145</span><span id="line-145"> // No data yet.</span> |
| <span class="source-line-no">146</span><span id="line-146"> return new long[quantiles.length];</span> |
| <span class="source-line-no">147</span><span id="line-147"> }</span> |
| <span class="source-line-no">148</span><span id="line-148"></span> |
| <span class="source-line-no">149</span><span id="line-149"> // Make a snapshot of lowerCounter, higherCounter and bins.counts to counts.</span> |
| <span class="source-line-no">150</span><span id="line-150"> // This is not synchronized, but since the counter are accumulating, the result is a good</span> |
| <span class="source-line-no">151</span><span id="line-151"> // estimation of a snapshot.</span> |
| <span class="source-line-no">152</span><span id="line-152"> long[] counts = new long[this.counts.length];</span> |
| <span class="source-line-no">153</span><span id="line-153"> long total = 0L;</span> |
| <span class="source-line-no">154</span><span id="line-154"> for (int i = 0; i < this.counts.length; i++) {</span> |
| <span class="source-line-no">155</span><span id="line-155"> counts[i] = this.counts[i].sum();</span> |
| <span class="source-line-no">156</span><span id="line-156"> total += counts[i];</span> |
| <span class="source-line-no">157</span><span id="line-157"> }</span> |
| <span class="source-line-no">158</span><span id="line-158"></span> |
| <span class="source-line-no">159</span><span id="line-159"> int rIndex = 0;</span> |
| <span class="source-line-no">160</span><span id="line-160"> double qCount = total * quantiles[0];</span> |
| <span class="source-line-no">161</span><span id="line-161"> long cum = 0L;</span> |
| <span class="source-line-no">162</span><span id="line-162"></span> |
| <span class="source-line-no">163</span><span id="line-163"> long[] res = new long[quantiles.length];</span> |
| <span class="source-line-no">164</span><span id="line-164"> countsLoop: for (int i = 0; i < counts.length; i++) {</span> |
| <span class="source-line-no">165</span><span id="line-165"> // mn and mx define a value range</span> |
| <span class="source-line-no">166</span><span id="line-166"> long mn, mx;</span> |
| <span class="source-line-no">167</span><span id="line-167"> if (i == 0) {</span> |
| <span class="source-line-no">168</span><span id="line-168"> mn = this.min.get();</span> |
| <span class="source-line-no">169</span><span id="line-169"> mx = this.binsMin;</span> |
| <span class="source-line-no">170</span><span id="line-170"> } else if (i == counts.length - 1) {</span> |
| <span class="source-line-no">171</span><span id="line-171"> mn = this.bins10XMax;</span> |
| <span class="source-line-no">172</span><span id="line-172"> mx = this.max.get();</span> |
| <span class="source-line-no">173</span><span id="line-173"> } else if (i == counts.length - 2) {</span> |
| <span class="source-line-no">174</span><span id="line-174"> mn = this.binsMax;</span> |
| <span class="source-line-no">175</span><span id="line-175"> mx = this.bins10XMax;</span> |
| <span class="source-line-no">176</span><span id="line-176"> } else {</span> |
| <span class="source-line-no">177</span><span id="line-177"> mn = this.binsMin + (i - 1) * (this.binsMax - this.binsMin) / (this.counts.length - 3);</span> |
| <span class="source-line-no">178</span><span id="line-178"> mx = this.binsMin + i * (this.binsMax - this.binsMin) / (this.counts.length - 3);</span> |
| <span class="source-line-no">179</span><span id="line-179"> }</span> |
| <span class="source-line-no">180</span><span id="line-180"></span> |
| <span class="source-line-no">181</span><span id="line-181"> if (mx < this.min.get()) {</span> |
| <span class="source-line-no">182</span><span id="line-182"> continue;</span> |
| <span class="source-line-no">183</span><span id="line-183"> }</span> |
| <span class="source-line-no">184</span><span id="line-184"> if (mn > this.max.get()) {</span> |
| <span class="source-line-no">185</span><span id="line-185"> break;</span> |
| <span class="source-line-no">186</span><span id="line-186"> }</span> |
| <span class="source-line-no">187</span><span id="line-187"> mn = Math.max(mn, this.min.get());</span> |
| <span class="source-line-no">188</span><span id="line-188"> mx = Math.min(mx, this.max.get());</span> |
| <span class="source-line-no">189</span><span id="line-189"></span> |
| <span class="source-line-no">190</span><span id="line-190"> // lastCum/cum are the corresponding counts to mn/mx</span> |
| <span class="source-line-no">191</span><span id="line-191"> double lastCum = cum;</span> |
| <span class="source-line-no">192</span><span id="line-192"> cum += counts[i];</span> |
| <span class="source-line-no">193</span><span id="line-193"></span> |
| <span class="source-line-no">194</span><span id="line-194"> // fill the results for qCount is within current range.</span> |
| <span class="source-line-no">195</span><span id="line-195"> while (qCount <= cum) {</span> |
| <span class="source-line-no">196</span><span id="line-196"> if (cum == lastCum) {</span> |
| <span class="source-line-no">197</span><span id="line-197"> res[rIndex] = mn;</span> |
| <span class="source-line-no">198</span><span id="line-198"> } else {</span> |
| <span class="source-line-no">199</span><span id="line-199"> res[rIndex] = (long) ((qCount - lastCum) * (mx - mn) / (cum - lastCum) + mn);</span> |
| <span class="source-line-no">200</span><span id="line-200"> }</span> |
| <span class="source-line-no">201</span><span id="line-201"></span> |
| <span class="source-line-no">202</span><span id="line-202"> // move to next quantile</span> |
| <span class="source-line-no">203</span><span id="line-203"> rIndex++;</span> |
| <span class="source-line-no">204</span><span id="line-204"> if (rIndex >= quantiles.length) {</span> |
| <span class="source-line-no">205</span><span id="line-205"> break countsLoop;</span> |
| <span class="source-line-no">206</span><span id="line-206"> }</span> |
| <span class="source-line-no">207</span><span id="line-207"> qCount = total * quantiles[rIndex];</span> |
| <span class="source-line-no">208</span><span id="line-208"> }</span> |
| <span class="source-line-no">209</span><span id="line-209"> }</span> |
| <span class="source-line-no">210</span><span id="line-210"> // In case quantiles contains values >= 100%</span> |
| <span class="source-line-no">211</span><span id="line-211"> for (; rIndex < quantiles.length; rIndex++) {</span> |
| <span class="source-line-no">212</span><span id="line-212"> res[rIndex] = this.max.get();</span> |
| <span class="source-line-no">213</span><span id="line-213"> }</span> |
| <span class="source-line-no">214</span><span id="line-214"></span> |
| <span class="source-line-no">215</span><span id="line-215"> return res;</span> |
| <span class="source-line-no">216</span><span id="line-216"> }</span> |
| <span class="source-line-no">217</span><span id="line-217"></span> |
| <span class="source-line-no">218</span><span id="line-218"> long getNumAtOrBelow(long val) {</span> |
| <span class="source-line-no">219</span><span id="line-219"> return Arrays.stream(counts).mapToLong(c -> c.sum()).limit(getIndex(val) + 1).sum();</span> |
| <span class="source-line-no">220</span><span id="line-220"> }</span> |
| <span class="source-line-no">221</span><span id="line-221"></span> |
| <span class="source-line-no">222</span><span id="line-222"> public long getMin() {</span> |
| <span class="source-line-no">223</span><span id="line-223"> long min = this.min.get();</span> |
| <span class="source-line-no">224</span><span id="line-224"> return min == Long.MAX_VALUE ? 0 : min; // in case it is not initialized</span> |
| <span class="source-line-no">225</span><span id="line-225"> }</span> |
| <span class="source-line-no">226</span><span id="line-226"></span> |
| <span class="source-line-no">227</span><span id="line-227"> public long getMean() {</span> |
| <span class="source-line-no">228</span><span id="line-228"> long count = this.count.sum();</span> |
| <span class="source-line-no">229</span><span id="line-229"> long total = this.total.sum();</span> |
| <span class="source-line-no">230</span><span id="line-230"> if (count == 0) {</span> |
| <span class="source-line-no">231</span><span id="line-231"> return 0;</span> |
| <span class="source-line-no">232</span><span id="line-232"> }</span> |
| <span class="source-line-no">233</span><span id="line-233"> return total / count;</span> |
| <span class="source-line-no">234</span><span id="line-234"> }</span> |
| <span class="source-line-no">235</span><span id="line-235"> }</span> |
| <span class="source-line-no">236</span><span id="line-236"></span> |
| <span class="source-line-no">237</span><span id="line-237"> // The bins counting values. It is replaced with a new one in calling of reset().</span> |
| <span class="source-line-no">238</span><span id="line-238"> private volatile Bins bins;</span> |
| <span class="source-line-no">239</span><span id="line-239"></span> |
| <span class="source-line-no">240</span><span id="line-240"> /**</span> |
| <span class="source-line-no">241</span><span id="line-241"> * Constructor.</span> |
| <span class="source-line-no">242</span><span id="line-242"> */</span> |
| <span class="source-line-no">243</span><span id="line-243"> public FastLongHistogram() {</span> |
| <span class="source-line-no">244</span><span id="line-244"> this(DEFAULT_NBINS);</span> |
| <span class="source-line-no">245</span><span id="line-245"> }</span> |
| <span class="source-line-no">246</span><span id="line-246"></span> |
| <span class="source-line-no">247</span><span id="line-247"> /**</span> |
| <span class="source-line-no">248</span><span id="line-248"> * Constructor.</span> |
| <span class="source-line-no">249</span><span id="line-249"> * @param numOfBins the number of bins for the histogram. A larger value results in more precise</span> |
| <span class="source-line-no">250</span><span id="line-250"> * results but with lower efficiency, and vice versus.</span> |
| <span class="source-line-no">251</span><span id="line-251"> */</span> |
| <span class="source-line-no">252</span><span id="line-252"> public FastLongHistogram(int numOfBins) {</span> |
| <span class="source-line-no">253</span><span id="line-253"> this.bins = new Bins(numOfBins);</span> |
| <span class="source-line-no">254</span><span id="line-254"> }</span> |
| <span class="source-line-no">255</span><span id="line-255"></span> |
| <span class="source-line-no">256</span><span id="line-256"> /**</span> |
| <span class="source-line-no">257</span><span id="line-257"> * Constructor setting the bins assuming a uniform distribution within a range.</span> |
| <span class="source-line-no">258</span><span id="line-258"> * @param numOfBins the number of bins for the histogram. A larger value results in more precise</span> |
| <span class="source-line-no">259</span><span id="line-259"> * results but with lower efficiency, and vice versus.</span> |
| <span class="source-line-no">260</span><span id="line-260"> * @param min lower bound of the region, inclusive.</span> |
| <span class="source-line-no">261</span><span id="line-261"> * @param max higher bound of the region, inclusive.</span> |
| <span class="source-line-no">262</span><span id="line-262"> */</span> |
| <span class="source-line-no">263</span><span id="line-263"> public FastLongHistogram(int numOfBins, long min, long max) {</span> |
| <span class="source-line-no">264</span><span id="line-264"> this(numOfBins);</span> |
| <span class="source-line-no">265</span><span id="line-265"> Bins bins = new Bins(numOfBins);</span> |
| <span class="source-line-no">266</span><span id="line-266"> bins.add(min, 1);</span> |
| <span class="source-line-no">267</span><span id="line-267"> bins.add(max, 1);</span> |
| <span class="source-line-no">268</span><span id="line-268"> this.bins = new Bins(bins, numOfBins, 0.01, 0.999);</span> |
| <span class="source-line-no">269</span><span id="line-269"> }</span> |
| <span class="source-line-no">270</span><span id="line-270"></span> |
| <span class="source-line-no">271</span><span id="line-271"> /**</span> |
| <span class="source-line-no">272</span><span id="line-272"> * Adds a value to the histogram.</span> |
| <span class="source-line-no">273</span><span id="line-273"> */</span> |
| <span class="source-line-no">274</span><span id="line-274"> public void add(long value, long count) {</span> |
| <span class="source-line-no">275</span><span id="line-275"> this.bins.add(value, count);</span> |
| <span class="source-line-no">276</span><span id="line-276"> }</span> |
| <span class="source-line-no">277</span><span id="line-277"></span> |
| <span class="source-line-no">278</span><span id="line-278"> /**</span> |
| <span class="source-line-no">279</span><span id="line-279"> * Computes the quantiles give the ratios.</span> |
| <span class="source-line-no">280</span><span id="line-280"> */</span> |
| <span class="source-line-no">281</span><span id="line-281"> public long[] getQuantiles(double[] quantiles) {</span> |
| <span class="source-line-no">282</span><span id="line-282"> return this.bins.getQuantiles(quantiles);</span> |
| <span class="source-line-no">283</span><span id="line-283"> }</span> |
| <span class="source-line-no">284</span><span id="line-284"></span> |
| <span class="source-line-no">285</span><span id="line-285"> public long[] getQuantiles() {</span> |
| <span class="source-line-no">286</span><span id="line-286"> return this.bins.getQuantiles(DEFAULT_QUANTILES);</span> |
| <span class="source-line-no">287</span><span id="line-287"> }</span> |
| <span class="source-line-no">288</span><span id="line-288"></span> |
| <span class="source-line-no">289</span><span id="line-289"> public long getMin() {</span> |
| <span class="source-line-no">290</span><span id="line-290"> return this.bins.getMin();</span> |
| <span class="source-line-no">291</span><span id="line-291"> }</span> |
| <span class="source-line-no">292</span><span id="line-292"></span> |
| <span class="source-line-no">293</span><span id="line-293"> public long getMax() {</span> |
| <span class="source-line-no">294</span><span id="line-294"> return this.bins.max.get();</span> |
| <span class="source-line-no">295</span><span id="line-295"> }</span> |
| <span class="source-line-no">296</span><span id="line-296"></span> |
| <span class="source-line-no">297</span><span id="line-297"> public long getCount() {</span> |
| <span class="source-line-no">298</span><span id="line-298"> return this.bins.count.sum();</span> |
| <span class="source-line-no">299</span><span id="line-299"> }</span> |
| <span class="source-line-no">300</span><span id="line-300"></span> |
| <span class="source-line-no">301</span><span id="line-301"> public long getMean() {</span> |
| <span class="source-line-no">302</span><span id="line-302"> return this.bins.getMean();</span> |
| <span class="source-line-no">303</span><span id="line-303"> }</span> |
| <span class="source-line-no">304</span><span id="line-304"></span> |
| <span class="source-line-no">305</span><span id="line-305"> public long getNumAtOrBelow(long value) {</span> |
| <span class="source-line-no">306</span><span id="line-306"> return this.bins.getNumAtOrBelow(value);</span> |
| <span class="source-line-no">307</span><span id="line-307"> }</span> |
| <span class="source-line-no">308</span><span id="line-308"></span> |
| <span class="source-line-no">309</span><span id="line-309"> /**</span> |
| <span class="source-line-no">310</span><span id="line-310"> * Resets the histogram for new counting.</span> |
| <span class="source-line-no">311</span><span id="line-311"> */</span> |
| <span class="source-line-no">312</span><span id="line-312"> public Snapshot snapshotAndReset() {</span> |
| <span class="source-line-no">313</span><span id="line-313"> final Bins oldBins = this.bins;</span> |
| <span class="source-line-no">314</span><span id="line-314"> this.bins = new Bins(this.bins, this.bins.counts.length - 3, 0.01, 0.99);</span> |
| <span class="source-line-no">315</span><span id="line-315"> final long[] percentiles = oldBins.getQuantiles(DEFAULT_QUANTILES);</span> |
| <span class="source-line-no">316</span><span id="line-316"> final long count = oldBins.count.sum();</span> |
| <span class="source-line-no">317</span><span id="line-317"></span> |
| <span class="source-line-no">318</span><span id="line-318"> return new Snapshot() {</span> |
| <span class="source-line-no">319</span><span id="line-319"> @Override</span> |
| <span class="source-line-no">320</span><span id="line-320"> public long[] getQuantiles(double[] quantiles) {</span> |
| <span class="source-line-no">321</span><span id="line-321"> return oldBins.getQuantiles(quantiles);</span> |
| <span class="source-line-no">322</span><span id="line-322"> }</span> |
| <span class="source-line-no">323</span><span id="line-323"></span> |
| <span class="source-line-no">324</span><span id="line-324"> @Override</span> |
| <span class="source-line-no">325</span><span id="line-325"> public long[] getQuantiles() {</span> |
| <span class="source-line-no">326</span><span id="line-326"> return percentiles;</span> |
| <span class="source-line-no">327</span><span id="line-327"> }</span> |
| <span class="source-line-no">328</span><span id="line-328"></span> |
| <span class="source-line-no">329</span><span id="line-329"> @Override</span> |
| <span class="source-line-no">330</span><span id="line-330"> public long getCount() {</span> |
| <span class="source-line-no">331</span><span id="line-331"> return count;</span> |
| <span class="source-line-no">332</span><span id="line-332"> }</span> |
| <span class="source-line-no">333</span><span id="line-333"></span> |
| <span class="source-line-no">334</span><span id="line-334"> @Override</span> |
| <span class="source-line-no">335</span><span id="line-335"> public long getCountAtOrBelow(long val) {</span> |
| <span class="source-line-no">336</span><span id="line-336"> return oldBins.getNumAtOrBelow(val);</span> |
| <span class="source-line-no">337</span><span id="line-337"> }</span> |
| <span class="source-line-no">338</span><span id="line-338"></span> |
| <span class="source-line-no">339</span><span id="line-339"> @Override</span> |
| <span class="source-line-no">340</span><span id="line-340"> public long get25thPercentile() {</span> |
| <span class="source-line-no">341</span><span id="line-341"> return percentiles[0];</span> |
| <span class="source-line-no">342</span><span id="line-342"> }</span> |
| <span class="source-line-no">343</span><span id="line-343"></span> |
| <span class="source-line-no">344</span><span id="line-344"> @Override</span> |
| <span class="source-line-no">345</span><span id="line-345"> public long get75thPercentile() {</span> |
| <span class="source-line-no">346</span><span id="line-346"> return percentiles[2];</span> |
| <span class="source-line-no">347</span><span id="line-347"> }</span> |
| <span class="source-line-no">348</span><span id="line-348"></span> |
| <span class="source-line-no">349</span><span id="line-349"> @Override</span> |
| <span class="source-line-no">350</span><span id="line-350"> public long get90thPercentile() {</span> |
| <span class="source-line-no">351</span><span id="line-351"> return percentiles[3];</span> |
| <span class="source-line-no">352</span><span id="line-352"> }</span> |
| <span class="source-line-no">353</span><span id="line-353"></span> |
| <span class="source-line-no">354</span><span id="line-354"> @Override</span> |
| <span class="source-line-no">355</span><span id="line-355"> public long get95thPercentile() {</span> |
| <span class="source-line-no">356</span><span id="line-356"> return percentiles[4];</span> |
| <span class="source-line-no">357</span><span id="line-357"> }</span> |
| <span class="source-line-no">358</span><span id="line-358"></span> |
| <span class="source-line-no">359</span><span id="line-359"> @Override</span> |
| <span class="source-line-no">360</span><span id="line-360"> public long get98thPercentile() {</span> |
| <span class="source-line-no">361</span><span id="line-361"> return percentiles[5];</span> |
| <span class="source-line-no">362</span><span id="line-362"> }</span> |
| <span class="source-line-no">363</span><span id="line-363"></span> |
| <span class="source-line-no">364</span><span id="line-364"> @Override</span> |
| <span class="source-line-no">365</span><span id="line-365"> public long get99thPercentile() {</span> |
| <span class="source-line-no">366</span><span id="line-366"> return percentiles[6];</span> |
| <span class="source-line-no">367</span><span id="line-367"> }</span> |
| <span class="source-line-no">368</span><span id="line-368"></span> |
| <span class="source-line-no">369</span><span id="line-369"> @Override</span> |
| <span class="source-line-no">370</span><span id="line-370"> public long get999thPercentile() {</span> |
| <span class="source-line-no">371</span><span id="line-371"> return percentiles[7];</span> |
| <span class="source-line-no">372</span><span id="line-372"> }</span> |
| <span class="source-line-no">373</span><span id="line-373"></span> |
| <span class="source-line-no">374</span><span id="line-374"> @Override</span> |
| <span class="source-line-no">375</span><span id="line-375"> public long getMedian() {</span> |
| <span class="source-line-no">376</span><span id="line-376"> return percentiles[1];</span> |
| <span class="source-line-no">377</span><span id="line-377"> }</span> |
| <span class="source-line-no">378</span><span id="line-378"></span> |
| <span class="source-line-no">379</span><span id="line-379"> @Override</span> |
| <span class="source-line-no">380</span><span id="line-380"> public long getMax() {</span> |
| <span class="source-line-no">381</span><span id="line-381"> return oldBins.max.get();</span> |
| <span class="source-line-no">382</span><span id="line-382"> }</span> |
| <span class="source-line-no">383</span><span id="line-383"></span> |
| <span class="source-line-no">384</span><span id="line-384"> @Override</span> |
| <span class="source-line-no">385</span><span id="line-385"> public long getMean() {</span> |
| <span class="source-line-no">386</span><span id="line-386"> return oldBins.getMean();</span> |
| <span class="source-line-no">387</span><span id="line-387"> }</span> |
| <span class="source-line-no">388</span><span id="line-388"></span> |
| <span class="source-line-no">389</span><span id="line-389"> @Override</span> |
| <span class="source-line-no">390</span><span id="line-390"> public long getMin() {</span> |
| <span class="source-line-no">391</span><span id="line-391"> return oldBins.getMin();</span> |
| <span class="source-line-no">392</span><span id="line-392"> }</span> |
| <span class="source-line-no">393</span><span id="line-393"> };</span> |
| <span class="source-line-no">394</span><span id="line-394"> }</span> |
| <span class="source-line-no">395</span><span id="line-395">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
