Package org.apache.hadoop.util

Class SysInfoWindows

java.lang.Object

org.apache.hadoop.util.SysInfo

org.apache.hadoop.util.SysInfoWindows

@Private
@Evolving
public class SysInfoWindows
extends SysInfo

Plugin to calculate resource information on Windows systems.

Constructor Summary

Constructors

Constructor	Description
SysInfoWindows()

Method Summary

Modifier and Type	Method	Description
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	getCpuUsagePercentage()	Obtain the CPU usage % of the machine.
long	getCumulativeCpuTime()	Obtain the cumulative CPU time since the system is on.
long	getNetworkBytesRead()	Obtain the aggregated number of bytes read over the network.
long	getNetworkBytesWritten()	Obtain the aggregated number of bytes written to the network.
int	getNumCores()	Obtain total number of physical cores present on the system.
int	getNumProcessors()	Obtain the total number of logical processors present on the system.
float	getNumVCoresUsed()	Obtain the number of VCores used.
long	getPhysicalMemorySize()	Obtain the total size of the physical memory present in the system.
long	getStorageBytesRead()	Obtain the aggregated number of bytes read from disks.
long	getStorageBytesWritten()	Obtain the aggregated number of bytes written to disks.
long	getVirtualMemorySize()	Obtain the total size of the virtual memory present in the system.

Methods inherited from class org.apache.hadoop.util.SysInfo

newInstance

Methods inherited from class java.lang.Object

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

Constructor Detail

SysInfoWindows

public SysInfoWindows()

Method Detail

getVirtualMemorySize

public long getVirtualMemorySize()

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

Specified by:

getVirtualMemorySize in class SysInfo

Returns:

virtual memory size in bytes.

getPhysicalMemorySize

public long getPhysicalMemorySize()

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

Specified by:

getPhysicalMemorySize in class SysInfo

Returns:

physical memory size bytes.

getAvailableVirtualMemorySize

public long getAvailableVirtualMemorySize()

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

Specified by:

getAvailableVirtualMemorySize in class SysInfo

Returns:

available virtual memory size in bytes.

getAvailablePhysicalMemorySize

public long getAvailablePhysicalMemorySize()

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

Specified by:

getAvailablePhysicalMemorySize in class SysInfo

Returns:

available physical memory size bytes.

getNumProcessors

public int getNumProcessors()

Obtain the total number of logical processors present on the system.

Specified by:

getNumProcessors in class SysInfo

Returns:

number of logical processors

getNumCores

public int getNumCores()

Obtain total number of physical cores present on the system.

Specified by:

getNumCores in class SysInfo

Returns:

number of physical cores

getCpuFrequency

public long getCpuFrequency()

Obtain the CPU frequency of on the system.

Specified by:

getCpuFrequency in class SysInfo

Returns:

CPU frequency in kHz

getCumulativeCpuTime

public long getCumulativeCpuTime()

Obtain the cumulative CPU time since the system is on.

Specified by:

getCumulativeCpuTime in class SysInfo

Returns:

cumulative CPU time in milliseconds

getCpuUsagePercentage

public float getCpuUsagePercentage()

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

Specified by:

getCpuUsagePercentage in class SysInfo

Returns:

CPU usage as a percentage (from 0 to 100) of available cycles.

getNumVCoresUsed

public float getNumVCoresUsed()

Obtain the number of VCores used. Return -1 if it is unavailable

Specified by:

getNumVCoresUsed in class SysInfo

Returns:

Number of VCores used a percentage (from 0 to #VCores).

getNetworkBytesRead

public long getNetworkBytesRead()

Obtain the aggregated number of bytes read over the network.

Specified by:

getNetworkBytesRead in class SysInfo

Returns:

total number of bytes read.

getNetworkBytesWritten

public long getNetworkBytesWritten()

Obtain the aggregated number of bytes written to the network.

Specified by:

getNetworkBytesWritten in class SysInfo

Returns:

total number of bytes written.

getStorageBytesRead

public long getStorageBytesRead()

Description copied from class: SysInfo

Obtain the aggregated number of bytes read from disks.

Specified by:

getStorageBytesRead in class SysInfo

Returns:

total number of bytes read.

getStorageBytesWritten

public long getStorageBytesWritten()

Description copied from class: SysInfo

Obtain the aggregated number of bytes written to disks.

Specified by:

getStorageBytesWritten in class SysInfo

Returns:

total number of bytes written.