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Enrich your NIC's capabilities with DPDK Soft NIC

Enrich your NIC's capabilities with DPDK Soft NIC. Cristian Dumitrescu, Jasvinder Singh, Reshma Pattan & Kevin Laatz Intel FOSDEM 2019. Why Soft NIC?. In DPDK, we have: Many ethdev APIs. Lots of NIC vendors. Not all NICs support the same features.

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Enrich your NIC's capabilities with DPDK Soft NIC

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  1. Enrich your NIC's capabilities with DPDK Soft NIC Cristian Dumitrescu, Jasvinder Singh, Reshma Pattan & Kevin Laatz Intel FOSDEM 2019

  2. Why Soft NIC? • In DPDK, we have: • Many ethdev APIs. • Lots of NIC vendors. • Not all NICs support the same features. • Soft NIC provides a solution for this by providing a software fallback for physical NICs by augmenting missing features! • Benefits • Usability: Allows consumption of advanced DPDK features without application redesign. • Performance: Allows performance boost of DPDK consumers apps. 1

  3. Soft NIC Overview 2

  4. Soft NIC Internals • Configuration Script • Provision resources. • Create and configure pipelines. • Application Thread / Service Cores • Configure Soft NIC. • Read packets from/write packets to Soft NIC queues. • Update Soft NIC: Flow, QoS, Security. • Soft NIC Threads • Call the Soft NIC run API to execute the pipelines assigned to current thread. 3

  5. Soft NIC Use Cases - Available feature • L2 Fwd (Switching). • L3 Fwd (Routing). • Flow classification (Firewall, encap, NAT). • Traffic management (Metering and Policing, QoS Scheduler). • Packet processing pipelines of complex work loads (vBNG/vBRAS). - Missing feature - Application ACL Routing Packet TX Packet RX HQoS Flow Classification Metering/ Policing Routing APP (CPU) Physical NIC only ACL Routing Packet TX Packet RX HQoS With Soft NIC Flow Classification Metering/ Policing Routing APP (CPU) Uplink Processing Blocks Downlink Processing Blocks 4

  6. Recap & References • Key take aways • Soft NIC provides a software fallback for physical NICs. • Consume advanced DPDK features without application redesign. • Potential performance improvement for consumer applications. • Many use cases – From simple forwarding to complex work loads. • DPDK Soft NIC documentation https://doc.dpdk.org/guides/nics/softnic.html 5

  7. Cristian Dumitrescu cristian.dumitrescu@intel.com Jasvinder Singh jasvinder.singh@intel.com Reshma Pattan reshma.pattan@intel.com Kevin Laatz kevin.laatz@intel.com Thank you!Questions? 6

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