content/docs/r3.3.1/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/apidocs/org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html - hadoop-site - Git at Google

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 <h2 title="Interface CGroupsHandler" class="title">Interface CGroupsHandler</h2>
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 <pre>@InterfaceAudience.Private
  @InterfaceStability.Unstable
 public interface <span class="typeNameLabel">CGroupsHandler</span></pre>
 <div class="block">Provides CGroups functionality. Implementations are expected to be
  thread-safe</div>
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 <caption><span>Nested Classes</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Interface and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static class&nbsp;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a></span></code>
 <div class="block">List of supported cgroup subsystem types.</div>
 </td>
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 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Field and Description</th>
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 <tr class="altColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_CPU_PERIOD_US">CGROUP_CPU_PERIOD_US</a></span></code>&nbsp;</td>
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 <tr class="rowColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_CPU_QUOTA_US">CGROUP_CPU_QUOTA_US</a></span></code>&nbsp;</td>
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 <tr class="altColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_CPU_SHARES">CGROUP_CPU_SHARES</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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_NO_LIMIT">CGROUP_NO_LIMIT</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_PARAM_BLKIO_WEIGHT">CGROUP_PARAM_BLKIO_WEIGHT</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_PARAM_CLASSID">CGROUP_PARAM_CLASSID</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_PARAM_MEMORY_HARD_LIMIT_BYTES">CGROUP_PARAM_MEMORY_HARD_LIMIT_BYTES</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_PARAM_MEMORY_MEMSW_USAGE_BYTES">CGROUP_PARAM_MEMORY_MEMSW_USAGE_BYTES</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_PARAM_MEMORY_OOM_CONTROL">CGROUP_PARAM_MEMORY_OOM_CONTROL</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_PARAM_MEMORY_SOFT_LIMIT_BYTES">CGROUP_PARAM_MEMORY_SOFT_LIMIT_BYTES</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_PARAM_MEMORY_SWAP_HARD_LIMIT_BYTES">CGROUP_PARAM_MEMORY_SWAP_HARD_LIMIT_BYTES</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_PARAM_MEMORY_SWAPPINESS">CGROUP_PARAM_MEMORY_SWAPPINESS</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_PARAM_MEMORY_USAGE_BYTES">CGROUP_PARAM_MEMORY_USAGE_BYTES</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#CGROUP_PROCS_FILE">CGROUP_PROCS_FILE</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#UNDER_OOM">UNDER_OOM</a></span></code>&nbsp;</td>
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 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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 <th class="colLast" scope="col">Method and Description</th>
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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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#createCGroup-org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandler.CGroupController-java.lang.String-">createCGroup</a></span>(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
             <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;cGroupId)</code>
 <div class="block">Creates a cgroup for a given controller.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#deleteCGroup-org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandler.CGroupController-java.lang.String-">deleteCGroup</a></span>(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
             <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;cGroupId)</code>
 <div class="block">Deletes the specified cgroup.</div>
 </td>
 </tr>
 <tr id="i2" 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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#getCGroupMountPath--">getCGroupMountPath</a></span>()</code>
 <div class="block">Returns CGroup Mount Path.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#getCGroupParam-org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandler.CGroupController-java.lang.String-java.lang.String-">getCGroupParam</a></span>(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
               <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;cGroupId,
               <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;param)</code>
 <div class="block">reads a cgroup parameter value, given a controller, cgroup id, parameter.</div>
 </td>
 </tr>
 <tr id="i4" 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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#getControllerPath-org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandler.CGroupController-">getControllerPath</a></span>(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller)</code>
 <div class="block">Gets the absolute path to the specified cgroup controller.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#getPathForCGroup-org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandler.CGroupController-java.lang.String-">getPathForCGroup</a></span>(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
                 <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;cGroupId)</code>
 <div class="block">Gets the full path for the cgroup, given a controller and a cgroup id.</div>
 </td>
 </tr>
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#getPathForCGroupParam-org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandler.CGroupController-java.lang.String-java.lang.String-">getPathForCGroupParam</a></span>(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
                      <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;cGroupId,
                      <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;param)</code>
 <div class="block">Gets the full path for a cgroup parameter, given a controller,
  cgroup id and parameter name.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#getPathForCGroupTasks-org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandler.CGroupController-java.lang.String-">getPathForCGroupTasks</a></span>(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
                      <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;cGroupId)</code>
 <div class="block">Gets the full path for the cgroup's tasks file, given a controller and a
  cgroup id.</div>
 </td>
 </tr>
 <tr id="i8" 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/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#getRelativePathForCGroup-java.lang.String-">getRelativePathForCGroup</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;cGroupId)</code>
 <div class="block">Gets the relative path for the cgroup, independent of a controller, for a
  given cgroup id.</div>
 </td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#initializeCGroupController-org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandler.CGroupController-">initializeCGroupController</a></span>(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller)</code>
 <div class="block">Mounts or initializes a cgroup controller.</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.html#updateCGroupParam-org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandler.CGroupController-java.lang.String-java.lang.String-java.lang.String-">updateCGroupParam</a></span>(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
                  <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;cGroupId,
                  <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;param,
                  <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;value)</code>
 <div class="block">updates a cgroup parameter, given a controller, cgroup id, parameter name.</div>
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 <pre>void&nbsp;initializeCGroupController(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller)
                          throws <a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/ResourceHandlerException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">ResourceHandlerException</a></pre>
 <div class="block">Mounts or initializes a cgroup controller.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>controller</code> - - the controller being initialized</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/ResourceHandlerException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">ResourceHandlerException</a></code> - the initialization failed due to the
  environment</dd>
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 <pre><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;createCGroup(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
                     <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;cGroupId)
              throws <a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/ResourceHandlerException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">ResourceHandlerException</a></pre>
 <div class="block">Creates a cgroup for a given controller.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>controller</code> - - controller type for which the cgroup is being created</dd>
 <dd><code>cGroupId</code> - - id of the cgroup being created</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>full path to created cgroup</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/ResourceHandlerException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">ResourceHandlerException</a></code> - creation failed</dd>
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 <pre>void&nbsp;deleteCGroup(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
                   <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;cGroupId)
            throws <a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/ResourceHandlerException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">ResourceHandlerException</a></pre>
 <div class="block">Deletes the specified cgroup.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>controller</code> - - controller type for the cgroup</dd>
 <dd><code>cGroupId</code> - - id of the cgroup being deleted</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/ResourceHandlerException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">ResourceHandlerException</a></code> - deletion failed</dd>
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 <pre><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;getControllerPath(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller)</pre>
 <div class="block">Gets the absolute path to the specified cgroup controller.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>controller</code> - - controller type for the cgroup</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the root of the controller.</dd>
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 <pre><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;getRelativePathForCGroup(<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;cGroupId)</pre>
 <div class="block">Gets the relative path for the cgroup, independent of a controller, for a
  given cgroup id.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>cGroupId</code> - - id of the cgroup</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>path for the cgroup relative to the root of (any) controller.</dd>
 </dl>
 </li>
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 <pre><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;getPathForCGroup(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
                         <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;cGroupId)</pre>
 <div class="block">Gets the full path for the cgroup, given a controller and a cgroup id.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>controller</code> - - controller type for the cgroup</dd>
 <dd><code>cGroupId</code> - - id of the cgroup</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>full path for the cgroup</dd>
 </dl>
 </li>
 </ul>
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 <pre><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;getPathForCGroupTasks(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
                              <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;cGroupId)</pre>
 <div class="block">Gets the full path for the cgroup's tasks file, given a controller and a
  cgroup id.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>controller</code> - - controller type for the cgroup</dd>
 <dd><code>cGroupId</code> - - id of the cgroup</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>full path for the cgroup's tasks file</dd>
 </dl>
 </li>
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 <pre><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;getPathForCGroupParam(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
                              <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;cGroupId,
                              <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;param)</pre>
 <div class="block">Gets the full path for a cgroup parameter, given a controller,
  cgroup id and parameter name.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>controller</code> - - controller type for the cgroup</dd>
 <dd><code>cGroupId</code> - - id of the cgroup</dd>
 <dd><code>param</code> - - cgroup parameter ( e.g classid )</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>full path for the cgroup parameter</dd>
 </dl>
 </li>
 </ul>
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 <pre>void&nbsp;updateCGroupParam(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
                        <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;cGroupId,
                        <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;param,
                        <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;value)
                 throws <a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/ResourceHandlerException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">ResourceHandlerException</a></pre>
 <div class="block">updates a cgroup parameter, given a controller, cgroup id, parameter name.
  and a parameter value</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>controller</code> - - controller type for the cgroup</dd>
 <dd><code>cGroupId</code> - - id of the cgroup</dd>
 <dd><code>param</code> - - cgroup parameter ( e.g classid )</dd>
 <dd><code>value</code> - - value to be written to the parameter file</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/ResourceHandlerException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">ResourceHandlerException</a></code> - the operation failed</dd>
 </dl>
 </li>
 </ul>
 <a name="getCGroupParam-org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandler.CGroupController-java.lang.String-java.lang.String-">
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 <h4>getCGroupParam</h4>
 <pre><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;getCGroupParam(<a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/CGroupsHandler.CGroupController.html" title="enum in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">CGroupsHandler.CGroupController</a>&nbsp;controller,
                       <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;cGroupId,
                       <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;param)
                throws <a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/ResourceHandlerException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">ResourceHandlerException</a></pre>
 <div class="block">reads a cgroup parameter value, given a controller, cgroup id, parameter.
  name</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>controller</code> - - controller type for the cgroup</dd>
 <dd><code>cGroupId</code> - - id of the cgroup</dd>
 <dd><code>param</code> - - cgroup parameter ( e.g classid )</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>parameter value as read from the parameter file</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/ResourceHandlerException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">ResourceHandlerException</a></code> - the operation failed</dd>
 </dl>
 </li>
 </ul>
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 <h4>getCGroupMountPath</h4>
 <pre><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;getCGroupMountPath()</pre>
 <div class="block">Returns CGroup Mount Path.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>parameter value as read from the parameter file</dd>
 </dl>
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