About Me
I am an Assistant Professor in the Department of Computer Science at the University of Virginia. Previously, I worked at Enfabrica.
My research spans networking, operating systems, and computer hardware.
Bio: I received my Ph.D. (2024) in Computer Science from Cornell University, where I was advised by Rachit Agarwal. I earned my M.S. from the Department of Computer Science at Princeton University, advised by Jennifer Rexford, and my B.S. in Computer Science from the University of Michigan.
I am recruiting Ph.D. students for Fall 2026 at UVA. If you're interested in working with me, please email caiqizhe@virginia.edu with your CV and research interests. Be sure to apply to the UVA Computer Science Ph.D. program and mention my name in your statement.
News
[July ’25] Co-chairing the SIGCOMM’25 Artifact Evaluation Committee.
[July ’25] Joining UVA as an Assistant Professor.
[March ’25] Serving on the NSDI’26 Program Committee.
Publications
Fast & Safe IO Memory Protection
Benny Rubin, Saksham Agarwal, Qizhe Cai, Rachit Agarwal
ACM SOSP 2024
[paper] [github]
Building Networked Systems for Terabit Ethernet (Ph.D. thesis)
Qizhe Cai, Cornell University, August 2024
[paper]
High-throughput and Flexible Host Networking for Accelerated Computing
Athinagoras Skiadopoulos, Zhiqiang Xie, Mark Zhao, Qizhe Cai, et al.
USENIX OSDI 2024
[paper]
Harmony: A Congestion-free Datacenter Architecture
Saksham Agarwal, Qizhe Cai, Rachit Agarwal, David Shmoys, Amin Vahdat
USENIX NSDI 2024
[paper] [github]
Towards µs Tail Latency and Terabit Ethernet: Disaggregating the Host Network Stack
Qizhe Cai, Midhul Vuppalapati, Jaehyun Hwang, Christos Kozyrakis, Rachit Agarwal
ACM SIGCOMM 2022
[paper] [github]
dcPIM: Near-Optimal Proactive Datacenter Transport
Qizhe Cai, Mina Tahmasbi Arashloo, Rachit Agarwal
ACM SIGCOMM 2022
[paper] [github]
Understanding Host Network Stack Overheads
Qizhe Cai, Shubham Chaudhary, Midhul Vuppalapati, Jaehyun Hwang, Rachit Agarwal
ACM SIGCOMM 2021
[paper] [github]
TCP ≈ RDMA: CPU-efficient Remote Storage Access with i10
Jaehyun Hwang, Qizhe Cai, Ao Tang, Rachit Agarwal
USENIX NSDI 2020
[paper] [github]
Network-Wide Heavy Hitter Detection for Real-Time Telemetry (Master’s Thesis)
Qizhe Cai, Princeton University, June 2018
[paper]
Network-Wide Heavy Hitter Detection with Commodity Switches
Rob Harrison, Qizhe Cai, Arpit Gupta, Jennifer Rexford
ACM SOSR 2018
[paper]
Service
Program Committee Member
External Reviewer
- IEEE Transactions on Network and Service Management
- IEEE Transactions on Mobile Computing
- Computer Networks
- IEEE Transactions on Consumer Electronics
- IEEE Network Magazine