The Palo Alto Networks QoS implementation now supports a new QoS mode called lockless QoS for PA-3410, PA-3420, PA-3430, PA-3440, PA-5410, PA-5420, PA-5430, PA-5440, and PA-5445 firewalls. For firewalls with higher bandwidth QoS requirements, the lockless QoS dedicates CPU cores to the QoS function that improves QoS performance, resulting in improved throughput and latency.