Package oshi.hardware.platform.linux

Class LinuxCentralProcessor

java.lang.Object

oshi.hardware.common.AbstractCentralProcessor

oshi.hardware.platform.linux.LinuxCentralProcessor

All Implemented Interfaces:

CentralProcessor

public class LinuxCentralProcessor
extends AbstractCentralProcessor

A CPU as defined in Linux /proc.

Nested Class Summary

Nested classes/interfaces inherited from interface oshi.hardware.CentralProcessor

CentralProcessor.LogicalProcessor, CentralProcessor.ProcessorIdentifier, CentralProcessor.TickType

Constructor Summary

Constructors

Constructor	Description
LinuxCentralProcessor()

Method Summary

Modifier and Type	Method	Description
double[]	getSystemLoadAverage(int nelem)	Returns the system load average for the number of elements specified, up to 3, representing 1, 5, and 15 minutes.
protected CentralProcessor.LogicalProcessor[]	initProcessorCounts()	Updates logical and physical processor counts and arrays
long	queryContextSwitches()	Get number of context switches
long[]	queryCurrentFreq()	Get processor current frequency.
long	queryInterrupts()	Get number of interrupts
long	queryMaxFreq()	Get processor max frequency.
long[][]	queryProcessorCpuLoadTicks()	Get the processor CPU load ticks
protected CentralProcessor.ProcessorIdentifier	queryProcessorId()	Updates logical and physical processor counts and arrays
long[]	querySystemCpuLoadTicks()	Get the system CPU load ticks

Methods inherited from class oshi.hardware.common.AbstractCentralProcessor

createProcessorID, getContextSwitches, getCurrentFreq, getFamily, getIdentifier, getInterrupts, getLogicalProcessorCount, getLogicalProcessors, getMaxFreq, getModel, getName, getPhysicalPackageCount, getPhysicalProcessorCount, getProcessorCpuLoadBetweenTicks, getProcessorCpuLoadTicks, getProcessorID, getProcessorIdentifier, getStepping, getSystemCpuLoadBetweenTicks, getSystemCpuLoadTicks, getVendor, getVendorFreq, isCpu64bit, toString

Methods inherited from class java.lang.Object

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

Constructor Details

LinuxCentralProcessor

public LinuxCentralProcessor()

Method Details

queryProcessorId

protected final CentralProcessor.ProcessorIdentifier queryProcessorId()

Description copied from class: AbstractCentralProcessor

Updates logical and physical processor counts and arrays

Specified by:

queryProcessorId in class AbstractCentralProcessor

Returns:

An array of initialized Logical Processors

initProcessorCounts

protected CentralProcessor.LogicalProcessor[] initProcessorCounts()

Description copied from class: AbstractCentralProcessor

Updates logical and physical processor counts and arrays

Specified by:

initProcessorCounts in class AbstractCentralProcessor

Returns:

An array of initialized Logical Processors

querySystemCpuLoadTicks

public long[] querySystemCpuLoadTicks()

Description copied from class: AbstractCentralProcessor

Get the system CPU load ticks

Specified by:

querySystemCpuLoadTicks in class AbstractCentralProcessor

Returns:

The system CPU load ticks

queryCurrentFreq

public long[] queryCurrentFreq()

Description copied from class: AbstractCentralProcessor

Get processor current frequency.

Specified by:

queryCurrentFreq in class AbstractCentralProcessor

Returns:

The current frequency.

queryMaxFreq

public long queryMaxFreq()

Description copied from class: AbstractCentralProcessor

Get processor max frequency.

Specified by:

queryMaxFreq in class AbstractCentralProcessor

Returns:

The max frequency.

getSystemLoadAverage

public double[] getSystemLoadAverage(int nelem)

Description copied from interface: CentralProcessor

Returns the system load average for the number of elements specified, up to 3, representing 1, 5, and 15 minutes. The system load average is the sum of the number of runnable entities queued to the available processors and the number of runnable entities running on the available processors averaged over a period of time. The way in which the load average is calculated is operating system specific but is typically a damped time-dependent average. If the load average is not available, a negative value is returned. This method is designed to provide a hint about the system load and may be queried frequently.

The load average may be unavailable on some platforms (e.g., Windows) where it is expensive to implement this method.

Parameters:

nelem - Number of elements to return.

Returns:

an array of the system load averages for 1, 5, and 15 minutes with the size of the array specified by nelem; or negative values if not available.

queryProcessorCpuLoadTicks

public long[][] queryProcessorCpuLoadTicks()

Description copied from class: AbstractCentralProcessor

Get the processor CPU load ticks

Specified by:

queryProcessorCpuLoadTicks in class AbstractCentralProcessor

Returns:

The processor CPU load ticks

queryContextSwitches

public long queryContextSwitches()

Description copied from class: AbstractCentralProcessor

Get number of context switches

Specified by:

queryContextSwitches in class AbstractCentralProcessor

Returns:

The context switches

queryInterrupts

public long queryInterrupts()

Description copied from class: AbstractCentralProcessor

Get number of interrupts

Specified by:

queryInterrupts in class AbstractCentralProcessor

Returns:

The interrupts