The Linux Kernel - TX QoS

• The devices queue is actually a tree structure of queues and classes to handle prioritized traffic and bandwidth control.
• The kernel enqueues the packet to the correct queue according to its priority.
• Dequeuing is intelligent and takes into account the bandwidth limit (dequeue is delayed when limit is reached).
• Priority queues combined with intelligent dequeue provide the desired outcome - real traffic control.
• Dequeued packets are passed to the network driver for physical transmission.