Disable IRQ Balance
You should turn off IRQ Balance to make sure you do not get hardware interrupts in your threads. Turning off IRQ Balance, will optimize the balance between power savings and performance through distribution of hardware interrupts across multiple processors.Warning: Disabling irqbalance will ruin network performance for a server which handles a lot ot traffic from many sources. For example, disabling irqbalance is probably one of the worst things you could do for a busy webserver, database server, or storage server.
To disable IRQ Balance, edit
sudo vi /etc/default/irqbalance
And Change the ENABLED value to 0: