To fetch the CPU Affinity of a Process

$ pidof sshd

$ taskset -p <PID_of_sshd>

To get the CPU range of a process

$ taskset -cp <PID_of_sshd>

To change the CPU affinity of a process by assigning the new value to the PID of the existing process 

$ taskset -p 0x7 <PID_of_sshd>

To Change CPU range

$ taskset -cp 0,2 <PID_of_sshd>

To set the CPU core

$ taskset -c 3,5 sshd

$ taskset -c 0-4 sshd