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<div class="subTitle">org.apache.hadoop.yarn.util</div>
<h2 title="Class ProcfsBasedProcessTree" class="title">Class ProcfsBasedProcessTree</h2>
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<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
<li>
<ul class="inheritance">
<li>org.apache.hadoop.conf.Configured</li>
<li>
<ul class="inheritance">
<li><a href="../../../../../org/apache/hadoop/yarn/util/ResourceCalculatorProcessTree.html" title="class in org.apache.hadoop.yarn.util">org.apache.hadoop.yarn.util.ResourceCalculatorProcessTree</a></li>
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<ul class="inheritance">
<li>org.apache.hadoop.yarn.util.ProcfsBasedProcessTree</li>
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<dt>All Implemented Interfaces:</dt>
<dd>org.apache.hadoop.conf.Configurable</dd>
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<pre>@InterfaceAudience.Private
@InterfaceStability.Unstable
public class <span class="typeNameLabel">ProcfsBasedProcessTree</span>
extends <a href="../../../../../org/apache/hadoop/yarn/util/ResourceCalculatorProcessTree.html" title="class in org.apache.hadoop.yarn.util">ResourceCalculatorProcessTree</a></pre>
<div class="block">A Proc file-system based ProcessTree. Works only on Linux.</div>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#JIFFY_LENGTH_IN_MILLIS">JIFFY_LENGTH_IN_MILLIS</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#KB_TO_BYTES">KB_TO_BYTES</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#PAGE_SIZE">PAGE_SIZE</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,org.apache.hadoop.yarn.util.ProcfsBasedProcessTree.ProcessTreeSmapMemInfo&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#processSMAPTree">processSMAPTree</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,org.apache.hadoop.yarn.util.ProcfsBasedProcessTree.ProcessInfo&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#processTree">processTree</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#PROCFS_CMDLINE_FILE">PROCFS_CMDLINE_FILE</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#PROCFS_STAT_FILE">PROCFS_STAT_FILE</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#SMAPS">SMAPS</a></span></code>&nbsp;</td>
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<code><a href="../../../../../org/apache/hadoop/yarn/util/ResourceCalculatorProcessTree.html#UNAVAILABLE">UNAVAILABLE</a></code></li>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#ProcfsBasedProcessTree-java.lang.String-">ProcfsBasedProcessTree</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;pid)</code>&nbsp;</td>
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<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#ProcfsBasedProcessTree-java.lang.String-java.lang.String-">ProcfsBasedProcessTree</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;pid,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;procfsDir)</code>&nbsp;</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#ProcfsBasedProcessTree-java.lang.String-java.lang.String-org.apache.hadoop.yarn.util.Clock-">ProcfsBasedProcessTree</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;pid,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;procfsDir,
<a href="../../../../../org/apache/hadoop/yarn/util/Clock.html" title="interface in org.apache.hadoop.yarn.util">Clock</a>&nbsp;clock)</code>
<div class="block">Build a new process tree rooted at the pid.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#checkPidPgrpidForMatch--">checkPidPgrpidForMatch</a></span>()</code>
<div class="block">Verify that the given process id is same as its process group id.</div>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#checkPidPgrpidForMatch-java.lang.String-java.lang.String-">checkPidPgrpidForMatch</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;_pid,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;procfs)</code>&nbsp;</td>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#contains-java.lang.String-">contains</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;pid)</code>
<div class="block">Returns boolean indicating whether pid
is in process tree.</div>
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<td class="colFirst"><code>float</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#getCpuUsagePercent--">getCpuUsagePercent</a></span>()</code>
<div class="block">Get the CPU usage by all the processes in the process-tree in Unix.</div>
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<tr id="i4" class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#getCumulativeCpuTime--">getCumulativeCpuTime</a></span>()</code>
<div class="block">Get the CPU time in millisecond used by all the processes in the
process-tree since the process-tree was created</div>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#getCurrentProcessIDs--">getCurrentProcessIDs</a></span>()</code>&nbsp;</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#getProcessTreeDump--">getProcessTreeDump</a></span>()</code>
<div class="block">Get a dump of the process-tree.</div>
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<tr id="i7" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#getRssMemorySize-int-">getRssMemorySize</a></span>(int&nbsp;olderThanAge)</code>
<div class="block">Get the resident set size (rss) memory used by all the processes
in the process-tree that are older than the passed in age.</div>
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<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#getVirtualMemorySize-int-">getVirtualMemorySize</a></span>(int&nbsp;olderThanAge)</code>
<div class="block">Get the virtual memory used by all the processes in the
process-tree that are older than the passed in age.</div>
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<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#isAvailable--">isAvailable</a></span>()</code>
<div class="block">Checks if the ProcfsBasedProcessTree is available on this system.</div>
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<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#main-java.lang.String:A-">main</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>[]&nbsp;args)</code>
<div class="block">Test the <a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html" title="class in org.apache.hadoop.yarn.util"><code>ProcfsBasedProcessTree</code></a></div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#setConf-org.apache.hadoop.conf.Configuration-">setConf</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#toString--">toString</a></span>()</code>
<div class="block">Returns a string printing PIDs of process present in the
ProcfsBasedProcessTree.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html#updateProcessTree--">updateProcessTree</a></span>()</code>
<div class="block">Update process-tree with latest state.</div>
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<pre>public static final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> PROCFS_STAT_FILE</pre>
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<pre>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,org.apache.hadoop.yarn.util.ProcfsBasedProcessTree.ProcessTreeSmapMemInfo&gt; processSMAPTree</pre>
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<pre>public&nbsp;ProcfsBasedProcessTree(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;pid)</pre>
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<pre>public&nbsp;ProcfsBasedProcessTree(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;pid,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;procfsDir)</pre>
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<pre>public&nbsp;ProcfsBasedProcessTree(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;pid,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;procfsDir,
<a href="../../../../../org/apache/hadoop/yarn/util/Clock.html" title="interface in org.apache.hadoop.yarn.util">Clock</a>&nbsp;clock)</pre>
<div class="block">Build a new process tree rooted at the pid.
This method is provided mainly for testing purposes, where
the root of the proc file system can be adjusted.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>pid</code> - root of the process tree</dd>
<dd><code>procfsDir</code> - the root of a proc file system - only used for testing.</dd>
<dd><code>clock</code> - clock for controlling time for testing</dd>
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<pre>public static&nbsp;boolean&nbsp;isAvailable()</pre>
<div class="block">Checks if the ProcfsBasedProcessTree is available on this system.</div>
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<pre>public&nbsp;void&nbsp;updateProcessTree()</pre>
<div class="block">Update process-tree with latest state. If the root-process is not alive,
tree will be empty.</div>
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<dd><code><a href="../../../../../org/apache/hadoop/yarn/util/ResourceCalculatorProcessTree.html#updateProcessTree--">updateProcessTree</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/hadoop/yarn/util/ResourceCalculatorProcessTree.html" title="class in org.apache.hadoop.yarn.util">ResourceCalculatorProcessTree</a></code></dd>
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<pre>public&nbsp;boolean&nbsp;checkPidPgrpidForMatch()</pre>
<div class="block">Verify that the given process id is same as its process group id.</div>
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<dd>a string concatenating the dump of information of all the processes
in the process-tree</dd>
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<div class="block">Get the virtual memory used by all the processes in the
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<div class="block">Get the resident set size (rss) memory used by all the processes
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<div class="block">Get the CPU time in millisecond used by all the processes in the
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<div class="block">Get the CPU usage by all the processes in the process-tree in Unix.
Note: UNAVAILABLE will be returned in case when CPU usage is not
available. It is NOT advised to return any other error code.</div>
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<a href="../../../../../org/apache/hadoop/yarn/util/ResourceCalculatorProcessTree.html#UNAVAILABLE"><code>ResourceCalculatorProcessTree.UNAVAILABLE</code></a> if CPU usage cannot be calculated or not available.</dd>
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<div class="block">Returns a string printing PIDs of process present in the
ProcfsBasedProcessTree. Output format : [pid pid ..]</div>
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<pre>public&nbsp;boolean&nbsp;contains(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;pid)</pre>
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<div class="block">Test the <a href="../../../../../org/apache/hadoop/yarn/util/ProcfsBasedProcessTree.html" title="class in org.apache.hadoop.yarn.util"><code>ProcfsBasedProcessTree</code></a></div>
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