Using taskset to set processor affinity I have the following code in a bash script: echo "bash pid => $$"; echo "processor affinity before => $(taskset -p $$)" taskset -cp ${AN_INTEGER} $$ echo "processor affinity after => $(taskset -p $$)" I get this output: processor affinity before => pid 5047's current affinity mask: ff pid 5047's current affinity list: 0-7 pid 5047's new affinity list: 1 processor affinity after => pid 5047's current affinity mask: 2 does anyone know what this means? The reason I started messing with processor affinity is because I would launch multiple bash child processes, and all the bash child process affinities had the value "ff" so it seemed like they were all targeting the same CPU.

`taskset` uses a mask to specify which CPUs a process can run on. Each bit maps to one CPU; if a bit is set to 1, the process can run on that CPU, if it’s set to 0, it can’t. Thus a mask of FF means any CPU from 0 to 7 (not one specific CPU), and a mask of 2 means only CPU 1.