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From rmetzger <...@git.apache.org>
Subject [GitHub] flink pull request: [FLINK-1792] TM Monitoring: CPU utilization, h...
Date Fri, 10 Apr 2015 13:02:46 GMT
Github user rmetzger commented on a diff in the pull request:

    https://github.com/apache/flink/pull/553#discussion_r28142224
  
    --- Diff: flink-runtime/src/main/scala/org/apache/flink/runtime/taskmanager/TaskManager.scala
---
    @@ -759,6 +778,24 @@ class TaskManager(val connectionInfo: InstanceConnectionInfo,
     
         task.unregisterMemoryManager(memoryManager)
       }
    +
    +  /**
    +   * Returns CPU Load if getProcessCpuLoad method is present
    +   * in the implementation of OperatingSystemMXBean
    +   * else returns -1
    +   *
    +   * @param obj
    +   * @return
    +   */
    +  private def fetchCPULoad(obj: Any): Any = {
    +    val methodsList = classOf[com.sun.management.OperatingSystemMXBean].getMethods()
    --- End diff --
    
    This reflection call is made on every heartbeat report (all 5 secs by default).
    it is actually only required to get the method once and invoke it each time we want to
get the CPU load.


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