Huai-En Tseng

I am familiar with data plane network function virtualization programming, high performance data plane system in data center, OpenFlow protocol, OpenvSwitch, RDMA programming, SR-I/OV, system programming optimization, eBPF/XDP, DPDK, Linux kernel packet processing, Ryu SDN controller, Kubernetes CNI and device plugin for RDMA. 

Senior Software engineer
City，Singapore/Taipei
[email protected]

Work experience

Shopee Singapore, Senior Software engineer , Sep 2021 ~ Now

1. Self-developed RDMA SR-I/OV cluster implementation for distributed machine learning system with lots nodes and 10 thousands pods. Including developing
 -  CNI and agent for RDMA.
 -  RDMA SRIOV Device plugin, supporting virtualized NIC resource management.
 -  RDMA cluster monitoring.
 -  Cluster E2E auto test framework and self-developed RDMA bandwidth test tool based on libibverbs.
 -  K8s pod management tool based on containerd for RDMA cluster.
 -  RDMA perf-test package contributor.
2. P4 networks in virtual gateway
In 2023, I start focusing on developing P4 gateway. Including: 
 - P4 switch kernel module
 - P4 switch functionality including protocol parsing, switch bring up and SDN based DC network.
 - Support 100G*16 ethernet ports and 500K port routes in one P4 gateway for crossing AZ/VPC traffic.
 - Deploy dozens to hundreds P4 gateway
3. eBFP/XDP data center gateway, supporting cross AZ/VPC traffic.
 - Migrate and optimize eBPF/XDP based gateway to various NIC. Such us Intel and Mellanox NIC. The optimization makes performance increases most 10% to 15% in bandwidth, most 50% less in latency.
 - eBPF based packet capturing tool for online XDP based gateway issue troubleshooting.

Chunghwa Telecom Lab., Associate Researcher , Sep 2018 ~ Sep 2021

Broadband Network Laboratory, Access networks
1. vOLT(virtual Optical Line Terminal) and SEBA project
 - OLT function
 - OMCI protocol
2. vRG(virtual Residential Gateway) project
 - Deploy self-developed DPDK based vRG system with BRAS(Broadband Remote Access Server) and for high performance broadband networks
 - Support 10Gbps and 6Mpps PPPoE network throughput and max to 2000 subscriptors. without hardware offload
 - Support PPPoE/DHCP/IGMP snooping/SNAT
 - Support single tag and double tag VLAN 
3. Fixed edge computing project
 - Led an edge computing project by using DPDK to make subscriptor can game on cloud and build cloud service in the local end, it supports several features like mac learning, ARP proxy,  and the features in vRG too.


Skills

  • RDMA programming/RoCE
  • DPDK
  • eBPF/XDP
  • Linux network stack
  • C, Golang, Python programming 
  • System software programming
  • Network protocol implementation, such as OpenFlow, PPPoE, DHCP
  • SDN/NFV and OpenvSwitch
  • Linux device driver
  • Kubernetes CNI related components implementation
  • Containerd
  • P4 swtich

Education

National Taiwan University of Science and Technology, Master Degree, Software Defined Networking and Network Function Virtualization, 2016 ~ 2018

Thesis: The Low Latency Service Function Chain with SR-I/OV in Software Defined Network

Teaching

I had been SDN/NFV tutor for half year after work. I teach SDN controller application development, OpenFlow protocol, OpenvSwitch, virtualization, and programming language.

Open source project

virtual Residential Gateway

Projects 00 00@2x

vRG

A virtualized Residential Gateway implementation using DPDK
Github Link
The virtual Residential gateway is used in Chunghwa Telecom Labs.

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