Goal

In TX path we copy significant part of some TX packets (depending on exact classification). For such a packets we can prefer to copy the entire packet and avoid mapping of them at all. Mapping involves heavy asynchronous PCI/HAL operations to create temporary/secure hardware addresses for specific packets. HW address for copied part of the packet already exists (obtained at initialization stage).

Acceptance criteria

Improvement of some TX throughput cases (probably short packets, UDP packets, non-IP packets etc) and no regression in other performance indicators.