Just recently I wanted to be able to lock a single process to a specific CPU for testing purposes. A bit of googling lead me to thisnice explanation of how it works.

Essentially you use the taskset command to run a new proc locked to a specific CPU:

% taskset -c 1 sleep 10

Will run ‘sleep 10’ locked to CPU #0.

% taskset -c -p 1<br /> pid 1's current affinity list: 0,1

Shows you what PID 1 has its affinity set to.