cpu.

$cat /proc/1119/cpuset
/
$
lightweight objects in the linux kernel that enable users
to partition their multiprocessor machine.

Knowledge

Multiprocessing  is  the  use  of  two  or  more  central
processing units (CPUs) within a single computer system
source : http://en.wikipedia.org/wiki/Multiprocessing

Compiler

GNU Make
 -j [jobs], --jobs[=jobs]
Specifies   the  number   of  jobs   (commands)   to  run
simultaneously.  If there is more than one -j option, the
last one is effective.  If the -j option is given without
an argument, make will not  limit the number of jobs that
can run simultaneously.