From taskset(1):

taskset  is  used  to  set  or  retrieve  the CPU affinity of a running
process given its PID or to launch a  new  COMMAND  with  a  given  CPU
affinity.   CPU affinity is a scheduler property that "bonds" a process
to a given set of CPUs on the system.  The Linux scheduler  will  honor
the  given CPU affinity and the process will not run on any other CPUs.

• Linux Setting processor affinity for a certain task or process (using taskset)
• CPU Affinity (on Linux Journal)
• Take charge of processor affinity (IBM doc)
• Improved Linux* SMP Scaling: User-directed Processor Affinity (Intel doc)
• Using Linux sched_setaffinity(2) To Bind Oracle Processes To CPUs
• Using Linux Processor Affinity To Beat The Oracle Licensing Police