get_nprocs (3) - Linux Manuals
get_nprocs: get number of processors
get_nprocs, get_nprocs_conf - get number of processors
DESCRIPTIONThe function get_nprocs_conf() returns the number of processors configured by the operating system.
The function get_nprocs() returns the number of processors currently available in the system. This may be less than the number returned by get_nprocs_conf() because processors may be offline (e.g., on hotpluggable systems).
RETURN VALUEAs given in DESCRIPTION.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
CONFORMING TOThese functions are GNU extensions.
NOTESThe current implementation of these functions is rather expensive, since they open and parse files in the /sys filesystem each time they are called.
The following sysconf(3) calls make use of the functions documented on this page to return the same information.
EXAMPLESThe following example shows how get_nprocs() and get_nprocs_conf() can be used.
#include <stdlib.h> #include <stdio.h> #include <sys/sysinfo.h>
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