Class MacCentralProcessor

    • Field Detail

      • LOG

        private static final org.slf4j.Logger LOG
      • ARM_P_CORES

        private static final java.util.Set<java.lang.String> ARM_P_CORES
      • CPU_N

        private static final java.util.regex.Pattern CPU_N
      • vendor

        private final java.util.function.Supplier<java.lang.String> vendor
      • isArmCpu

        private final boolean isArmCpu
      • performanceCoreFrequency

        private long performanceCoreFrequency
      • efficiencyCoreFrequency

        private long efficiencyCoreFrequency
    • Constructor Detail

      • MacCentralProcessor

        MacCentralProcessor()
    • Method Detail

      • getFeatureFlagsFromSysctl

        private java.util.List<java.lang.String> getFeatureFlagsFromSysctl()
      • 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.

        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.loadaverage to true to 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.

        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.
      • platformExpert

        private static java.lang.String platformExpert()
      • queryCompatibleStrings

        private static java.util.Map<java.lang.Integer,​java.lang.String> queryCompatibleStrings()
      • isArmCpu

        private boolean isArmCpu()
      • calculateNominalFrequencies

        private void calculateNominalFrequencies()
      • getMaxFreqFromByteArray

        private long getMaxFreqFromByteArray​(byte[] data)