Class LinuxCentralProcessorFFM
java.lang.Object
oshi.hardware.common.AbstractCentralProcessor
oshi.hardware.platform.linux.LinuxCentralProcessorFFM
- All Implemented Interfaces:
CentralProcessor
FFM-based Linux central processor implementation. Extends
LinuxCentralProcessor, overriding udev-dependent
methods with FFM implementations via UdevFunctions.-
Nested Class Summary
Nested classes/interfaces inherited from interface CentralProcessor
CentralProcessor.LogicalProcessor, CentralProcessor.PhysicalProcessor, CentralProcessor.ProcessorCache, CentralProcessor.ProcessorIdentifier, CentralProcessor.TickType -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprotected static CentralProcessor.LogicalProcessorgetLogicalProcessorFromSyspath(String syspath, Set<CentralProcessor.ProcessorCache> caches, String modAlias, Map<Integer, Integer> coreEfficiencyMap, Map<Integer, String> modAliasMap) 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 Quartet<List<CentralProcessor.LogicalProcessor>, List<CentralProcessor.PhysicalProcessor>, List<CentralProcessor.ProcessorCache>, List<String>> Initializes logical and physical processor lists and feature flags.longGet number of context switcheslong[]Get processor current frequency.protected static booleanqueryCurrentFreqFromSysfs(long[] freqs) protected booleanqueryCurrentFreqFromUdev(long[] freqs) Fills the freqs array from udev cpu-freq source.longGet number of interruptslongGet processor max frequency.protected static longqueryMaxFreqFromCpuFreqPath(String cpuFreqPath) protected static longprotected longQueries the max CPU frequency from udev.long[][]Get the processor CPU load ticksprotected CentralProcessor.ProcessorIdentifierUpdates logical and physical processor counts and arrayslong[]Get the system CPU load ticksprotected static Quartet<List<CentralProcessor.LogicalProcessor>, List<CentralProcessor.ProcessorCache>, Map<Integer, Integer>, Map<Integer, String>> protected Quartet<List<CentralProcessor.LogicalProcessor>, List<CentralProcessor.ProcessorCache>, Map<Integer, Integer>, Map<Integer, String>> Reads CPU topology using udev.Methods inherited from class AbstractCentralProcessor
createProcessorID, createProcListFromDmesg, getContextSwitches, getCurrentFreq, getFeatureFlags, getInterrupts, getLogicalProcessorCount, getLogicalProcessors, getMaxFreq, getPhysicalPackageCount, getPhysicalProcessorCount, getPhysicalProcessors, getProcessorCaches, getProcessorCpuLoadBetweenTicks, getProcessorCpuLoadBetweenTicks, getProcessorCpuLoadTicks, getProcessorIdentifier, getSystemCpuLoadBetweenTicks, getSystemCpuLoadBetweenTicks, getSystemCpuLoadTicks, orderedProcCaches, toStringMethods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitMethods inherited from interface CentralProcessor
getProcessorCpuLoad, getSystemCpuLoad
-
Constructor Details
-
LinuxCentralProcessorFFM
public LinuxCentralProcessorFFM()
-
-
Method Details
-
getSystemLoadAverage
public double[] getSystemLoadAverage(int nelem) Description copied from interface:CentralProcessorReturns 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.This method is designed to provide a hint about the system load and may be queried frequently.
The way in which the load average is calculated is operating system specific but is typically a damped time-dependent average. Linux includes processes waiting for system resources such as disks, while macOS and Unix consider only processes waiting for CPU.
Windows does not provide a load average. Users may set the configuration property
oshi.os.windows.loadaveragetotrueto start a daemon thread which will provide a similar metric.The load average may be unavailable on some platforms (e.g., Windows without the above configuration). If the load average is not available, a negative value is returned.
- Specified by:
getSystemLoadAveragein interfaceCentralProcessor- 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.
-
readTopologyWithUdev
protected Quartet<List<CentralProcessor.LogicalProcessor>, List<CentralProcessor.ProcessorCache>, Map<Integer,Integer>, Map<Integer, readTopologyWithUdev()String>> Reads CPU topology using udev. Subclasses provide the implementation.- Returns:
- topology quartet of logical processors, caches, core efficiency map, and mod alias map
-
queryCurrentFreqFromUdev
protected boolean queryCurrentFreqFromUdev(long[] freqs) Fills the freqs array from udev cpu-freq source. Returns true if successful (max > 0). Subclasses provide the implementation.- Parameters:
freqs- array to fill with per-logical-processor frequencies in Hz- Returns:
- true if frequencies were successfully read
-
queryMaxFreqFromUdev
protected long queryMaxFreqFromUdev()Queries the max CPU frequency from udev. Subclasses provide the implementation.- Returns:
- max frequency in Hz, or -1 if unavailable
-
queryProcessorId
Description copied from class:AbstractCentralProcessorUpdates logical and physical processor counts and arrays- Specified by:
queryProcessorIdin classAbstractCentralProcessor- Returns:
- An array of initialized Logical Processors
-
initProcessorCounts
protected Quartet<List<CentralProcessor.LogicalProcessor>, List<CentralProcessor.PhysicalProcessor>, List<CentralProcessor.ProcessorCache>, List<String>> initProcessorCounts()Description copied from class:AbstractCentralProcessorInitializes logical and physical processor lists and feature flags.- Specified by:
initProcessorCountsin classAbstractCentralProcessor- Returns:
- Lists of initialized Logical Processors, Physical Processors, Processor Caches, and Feature Flags.
-
readTopologyFromSysfs
-
getLogicalProcessorFromSyspath
-
querySystemCpuLoadTicks
public long[] querySystemCpuLoadTicks()Description copied from class:AbstractCentralProcessorGet the system CPU load ticks- Specified by:
querySystemCpuLoadTicksin classAbstractCentralProcessor- Returns:
- The system CPU load ticks
-
queryCurrentFreq
public long[] queryCurrentFreq()Description copied from class:AbstractCentralProcessorGet processor current frequency.- Specified by:
queryCurrentFreqin classAbstractCentralProcessor- Returns:
- The current frequency.
-
queryCurrentFreqFromSysfs
protected static boolean queryCurrentFreqFromSysfs(long[] freqs) -
queryMaxFreq
public long queryMaxFreq()Description copied from class:AbstractCentralProcessorGet processor max frequency.- Overrides:
queryMaxFreqin classAbstractCentralProcessor- Returns:
- The max frequency.
-
queryMaxFreqFromSysfs
protected static long queryMaxFreqFromSysfs() -
queryMaxFreqFromCpuFreqPath
-
queryProcessorCpuLoadTicks
public long[][] queryProcessorCpuLoadTicks()Description copied from class:AbstractCentralProcessorGet the processor CPU load ticks- Specified by:
queryProcessorCpuLoadTicksin classAbstractCentralProcessor- Returns:
- The processor CPU load ticks
-
queryContextSwitches
public long queryContextSwitches()Description copied from class:AbstractCentralProcessorGet number of context switches- Specified by:
queryContextSwitchesin classAbstractCentralProcessor- Returns:
- The context switches
-
queryInterrupts
public long queryInterrupts()Description copied from class:AbstractCentralProcessorGet number of interrupts- Specified by:
queryInterruptsin classAbstractCentralProcessor- Returns:
- The interrupts
-