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June 25 - 27 - Beijing, China
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Tuesday, June 26 • 13:30 - 14:10
Zero-Copy Optimization for DPDK vhost-user Receiving - Jing Chen, Alibaba Cloud (slides attached)

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Virtio-net, a para-virtualized technology and De-Facto standard network interface today, is not officially supported by NIC vendors. vSwitch plus virtio-net is a golden combination considering its popularity, while performance is an important consideration.

This tutorial will introduce the solution that offloads the vSwitch function into smart NICs and discuss the data transformation issue between vendor-specific interface and virtio-net. To fix the issue, a light-weight application based on DPDK is introduced to perform simple packet forwarding. To ensure high-performance and low latency, a zero-copy receiving approach is developed. NIC DMA packets received from the network are transmitted into guest memory directly. Th approach re-constructs the memory pool to make the zero-copy process transparent to both NIC and virtio-net drivers without modifying any NIC or virtio-net driver.


Jing Chen

Staff engineer, Aliyun
Jing is a veteran in driver development and system optimization with more than a decade of experience. As a technical lead at Apsara Networking product team, Jing is leading the network product optimization work and smart NIC development. Before Joining Alibaba Cloud, Jing worked... Read More →

Tuesday June 26, 2018 13:30 - 14:10 CST