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hostinfo(8)               BSD System Manager's Manual              hostinfo(8)

NAME
     hostinfo -- host information

SYNOPSIS
     hostinfo

DESCRIPTION
     The hostinfo command displays information about the host system on which the command is executing.  The
     output includes a  kernel version description, processor configuration data, available physical memory,
     and various scheduling statistics.

OPTIONS
     There are no options.

DISPLAY
           Mach kernel version:
           The version string compiled into the kernel executing on the host system.

           Processor Configuration:
           The maximum possible processors for which the kernel is configured, followed by the number of
           physical and logical processors available.

           Note: on Intel architectures, physical processors are referred to as cores, and logical proces-sors processors
           sors are referred to as hardware threads; there may be multiple logical processors per core and
           multiple cores per processor package.  This command does not report the number of processor pack-ages. packages.
           ages.

           Processor type:
           The host's processor type and subtype.

           Processor active:
           A list of active processors on the host system.  Active processors are members of a processor set
           and are ready to dispatch threads.  On a single processor system, the active processor, is pro-cessor processor
           cessor 0.

           Primary memory available:
           The amount of physical memory that is configured for use on the host system.

           Default processor set:
           Displays the number of tasks currently assigned to the host processor set, the number of threads
           currently assigned to the host processor set, and the number of processors included in the host
           processor set.

           Load average:
           Measures the average number of threads in the run queue.

           Mach factor:
           A variant of the load average which measures the processing resources available to a new thread.
           Mach factor is based on the number of CPUs divided by (1 + the number of runnablethreads) or the
           number of CPUs minus the number of runnable threads when the number of runnable threads is less
           than the number of CPUs.  The closer the Mach factor value is to zero, the higher the load.  On
           an idle system with a fixed number of active processors, the mach factor will be equal to the
           number of CPUs.

SEE ALSO
     sysctl(8)

Mac OS X                       October 30, 2003                       Mac OS X