Due to a ransomware attack, the wiki was reverted to a July 2022 version. . We apologize for the lack of a more recent valid backup.
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Currently, the server device driver supports 4 programmability modes as follows:
- flow: Refers to the Flow Director (e.g., Intel's Flow Director) component of modern NICs. In this mode the server device driver can send explicit flow rules to a server's NIC(s) in order to perform traffic classification (e.g., match the values of a packet's header field), modification (e.g., drop a packet), and dispatching (e.g., place a packet into a specific hardware queue associated with a CPU core)
- mac: Refers to the Medium Access Control (MAC)-based Virtual Machine Device queues (VMDq) (e.g., Intel's VMDq) component of modern NICs. In this mode, a server associates a set of (virtual) MAC addresses with a set of CPU cores. Input packets' destination MAC address field is matched against these values and upon a successful match, the packet is redirected to the respective CPU core.
- vlan: Refers to the Virtual Local Area (VLAN) identifier (ID)-based VMDq (e.g., Intel's VMDq) component of modern NICs. In this mode, a server associates a set of VLAN IDs with a set of CPU cores. Input packets' VLAN ID field is matched against these values and upon a successful match, the packet is redirected to the respective CPU core.
- rss: Refers to the Receive-Side Scaling (RSS) (e.g., Intel's RSS) component of modern NICs. In this mode, the server's NIC applies a hash function to certain header field values of incoming packets, in order to identify the CPU core that is going to undertake the processing of each packet.
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