org.apache.hadoop.util

类 ProcfsBasedProcessTree

java.lang.Object

org.apache.hadoop.util.ProcessTree

org.apache.hadoop.util.ProcfsBasedProcessTree

public class ProcfsBasedProcessTree
extends ProcessTree

A Proc file-system based ProcessTree. Works only on Linux.

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.util.ProcessTree

ProcessTree.Signal

字段概要

字段

限定符和类型	字段和说明
static long	JIFFY_LENGTH_IN_MILLIS
static long	PAGE_SIZE

从类继承的字段 org.apache.hadoop.util.ProcessTree

isSetsidAvailable

构造器概要

构造器

构造器和说明
ProcfsBasedProcessTree(String pid)
ProcfsBasedProcessTree(String pid, boolean setsidUsed)
ProcfsBasedProcessTree(String pid, String procfsDir)

方法概要

方法

限定符和类型	方法和说明
long	getCumulativeCpuTime() Get the CPU time in millisecond used by all the processes in the process-tree since the process-tree created
long	getCumulativeRssmem() Get the cumulative resident set size (rss) memory used by all the processes in the process-tree.
long	getCumulativeRssmem(int olderThanAge) Get the cumulative resident set size (rss) memory used by all the processes in the process-tree that are older than the passed in age.
long	getCumulativeVmem() Get the cumulative virtual memory used by all the processes in the process-tree.
long	getCumulativeVmem(int olderThanAge) Get the cumulative virtual memory used by all the processes in the process-tree that are older than the passed in age.
ProcfsBasedProcessTree	getProcessTree() Get the process-tree with latest state.
String	getProcessTreeDump() Get a dump of the process-tree.
boolean	isAlive() Is the root-process alive?
boolean	isAnyProcessInTreeAlive() Is any of the subprocesses in the process-tree alive?
static boolean	isAvailable() Checks if the ProcfsBasedProcessTree is available on this system.
String	toString() Returns a string printing PIDs of process present in the ProcfsBasedProcessTree.

从类继承的方法 org.apache.hadoop.util.ProcessTree

isAlive, isProcessGroupAlive, killProcess, killProcessGroup

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

字段详细资料

PAGE_SIZE

public static final long PAGE_SIZE

JIFFY_LENGTH_IN_MILLIS

public static final long JIFFY_LENGTH_IN_MILLIS

构造器详细资料

ProcfsBasedProcessTree

public ProcfsBasedProcessTree(String pid)

ProcfsBasedProcessTree

public ProcfsBasedProcessTree(String pid,
                      boolean setsidUsed)

ProcfsBasedProcessTree

public ProcfsBasedProcessTree(String pid,
                      String procfsDir)

方法详细资料

isAvailable

public static boolean isAvailable()

Checks if the ProcfsBasedProcessTree is available on this system.

返回:

true if ProcfsBasedProcessTree is available. False otherwise.

getProcessTree

public ProcfsBasedProcessTree getProcessTree()

Get the process-tree with latest state. If the root-process is not alive, an empty tree will be returned.

返回:

the process-tree with latest state.

isAlive

public boolean isAlive()

Is the root-process alive?

返回:

true if the root-process is alive, false otherwise.

isAnyProcessInTreeAlive

public boolean isAnyProcessInTreeAlive()

Is any of the subprocesses in the process-tree alive?

返回:

true if any of the processes in the process-tree is alive, false otherwise.

getProcessTreeDump

public String getProcessTreeDump()

Get a dump of the process-tree.

返回:

a string concatenating the dump of information of all the processes in the process-tree

getCumulativeVmem

public long getCumulativeVmem()

Get the cumulative virtual memory used by all the processes in the process-tree.

返回:

cumulative virtual memory used by the process-tree in bytes.

getCumulativeRssmem

public long getCumulativeRssmem()

Get the cumulative resident set size (rss) memory used by all the processes in the process-tree.

返回:

cumulative rss memory used by the process-tree in bytes. return 0 if it cannot be calculated

getCumulativeVmem

public long getCumulativeVmem(int olderThanAge)

Get the cumulative virtual memory used by all the processes in the process-tree that are older than the passed in age.

参数:

olderThanAge - processes above this age are included in the memory addition

返回:

cumulative virtual memory used by the process-tree in bytes, for processes older than this age.

getCumulativeRssmem

public long getCumulativeRssmem(int olderThanAge)

Get the cumulative resident set size (rss) memory used by all the processes in the process-tree that are older than the passed in age.

参数:

olderThanAge - processes above this age are included in the memory addition

返回:

cumulative rss memory used by the process-tree in bytes, for processes older than this age. return 0 if it cannot be calculated

getCumulativeCpuTime

public long getCumulativeCpuTime()

Get the CPU time in millisecond used by all the processes in the process-tree since the process-tree created

返回:

cumulative CPU time in millisecond since the process-tree created return 0 if it cannot be calculated

toString

public String toString()

Returns a string printing PIDs of process present in the ProcfsBasedProcessTree. Output format : [pid pid ..]

覆盖:

toString 在类中 Object