org.apache.hadoop.util

类 LinuxResourceCalculatorPlugin

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.util.ResourceCalculatorPlugin

org.apache.hadoop.util.LinuxResourceCalculatorPlugin

所有已实现的接口:

Configurable

public class LinuxResourceCalculatorPlugin
extends ResourceCalculatorPlugin

Plugin to calculate resource information on Linux systems.

嵌套类概要

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

ResourceCalculatorPlugin.ProcResourceValues

构造器概要

构造器

构造器和说明
LinuxResourceCalculatorPlugin()
LinuxResourceCalculatorPlugin(String procfsMemFile, String procfsCpuFile, String procfsStatFile, long jiffyLengthInMillis) Constructor which allows assigning the /proc/ directories.

方法概要

方法

限定符和类型	方法和说明
long	getAvailablePhysicalMemorySize() Obtain the total size of the available physical memory present in the system.
long	getAvailableVirtualMemorySize() Obtain the total size of the available virtual memory present in the system.
long	getCpuFrequency() Obtain the CPU frequency of on the system.
float	getCpuUsage() Obtain the CPU usage % of the machine.
long	getCumulativeCpuTime() Obtain the cumulative CPU time since the system is on.
int	getNumProcessors() Obtain the total number of processors present on the system.
long	getPhysicalMemorySize() Obtain the total size of the physical memory present in the system.
ResourceCalculatorPlugin.ProcResourceValues	getProcResourceValues() Obtain resource status used by current process tree.
long	getVirtualMemorySize() Obtain the total size of the virtual memory present in the system.
static void	main(String[] args) Test the LinuxResourceCalculatorPlugin

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

getResourceCalculatorPlugin

从类继承的方法 org.apache.hadoop.conf.Configured

getConf, setConf

从类继承的方法 java.lang.Object

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

构造器详细资料

LinuxResourceCalculatorPlugin

public LinuxResourceCalculatorPlugin()

LinuxResourceCalculatorPlugin

public LinuxResourceCalculatorPlugin(String procfsMemFile,
                             String procfsCpuFile,
                             String procfsStatFile,
                             long jiffyLengthInMillis)

Constructor which allows assigning the /proc/ directories. This will be used only in unit tests

参数:

procfsMemFile - fake file for /proc/meminfo

procfsCpuFile - fake file for /proc/cpuinfo

procfsStatFile - fake file for /proc/stat

jiffyLengthInMillis - fake jiffy length value

方法详细资料

getPhysicalMemorySize

public long getPhysicalMemorySize()

Obtain the total size of the physical memory present in the system.

指定者:

getPhysicalMemorySize 在类中 ResourceCalculatorPlugin

返回:

physical memory size bytes.

getVirtualMemorySize

public long getVirtualMemorySize()

Obtain the total size of the virtual memory present in the system.

指定者:

getVirtualMemorySize 在类中 ResourceCalculatorPlugin

返回:

virtual memory size in bytes.

getAvailablePhysicalMemorySize

public long getAvailablePhysicalMemorySize()

Obtain the total size of the available physical memory present in the system.

指定者:

getAvailablePhysicalMemorySize 在类中 ResourceCalculatorPlugin

返回:

available physical memory size bytes.

getAvailableVirtualMemorySize

public long getAvailableVirtualMemorySize()

Obtain the total size of the available virtual memory present in the system.

指定者:

getAvailableVirtualMemorySize 在类中 ResourceCalculatorPlugin

返回:

available virtual memory size in bytes.

getNumProcessors

public int getNumProcessors()

Obtain the total number of processors present on the system.

指定者:

getNumProcessors 在类中 ResourceCalculatorPlugin

返回:

number of processors

getCpuFrequency

public long getCpuFrequency()

Obtain the CPU frequency of on the system.

指定者:

getCpuFrequency 在类中 ResourceCalculatorPlugin

返回:

CPU frequency in kHz

getCumulativeCpuTime

public long getCumulativeCpuTime()

Obtain the cumulative CPU time since the system is on.

指定者:

getCumulativeCpuTime 在类中 ResourceCalculatorPlugin

返回:

cumulative CPU time in milliseconds

getCpuUsage

public float getCpuUsage()

Obtain the CPU usage % of the machine. Return -1 if it is unavailable

指定者:

getCpuUsage 在类中 ResourceCalculatorPlugin

返回:

CPU usage in %

main

public static void main(String[] args)

Test the LinuxResourceCalculatorPlugin

参数:

args -

getProcResourceValues

public ResourceCalculatorPlugin.ProcResourceValues getProcResourceValues()

从类复制的说明: ResourceCalculatorPlugin

Obtain resource status used by current process tree.

指定者:

getProcResourceValues 在类中 ResourceCalculatorPlugin