About Me

I am an incoming Assistant Professor in the Department of Computer Science at University of Virginia (starting July 2025). Before that, I will be at Enfabrica.

My research interests broadly span across networking, operating systems, and hardware.

Bio: I obtained my Ph.D. (2024) from the Department of Computer Science at Cornell University, advised by Rachit Agarwal. Before joining Cornell, I got my Master of Science degree in the Department of Computer Science at Princeton University, advised by Jennifer Rexford. I got my Bachelor degree in Computer Science from the Department of EECS at University of Michigan.

I have multiple PhD openings for the upcoming Fall 2025 cycle at UVA. If you are interested in working with me, feel free to send me an email with your research interests and CV, and apply to the UVA Computer Science program, mentioning my name in your statement.

News

Publications

Fast & Safe IO Memory Protection

Benny Rubin, Saksham Agarwal, Qizhe Cai, Rachit Agarwal

In ACM SOSP 2024

[paper]

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, Saksham Agarwal, Jacob Adelmann, David Ahern, Carlo Contavalli, Michael Goldflam, Vitaly Mayatskikh, Raghu Raja, Daniel Walton, Rachit Agarwal, Shrijeet Mukherjee, Christos Kozyrakis

In USENIX OSDI 2024

[paper]

Harmony: A Congestion-free Datacenter Architecture

Saksham Agarwal, Qizhe Cai, Rachit Agarwal, David Shmoys, Amin Vahdat

In 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

In ACM SIGCOMM 2022

[paper] [github]

dcPIM: Near-Optimal Proactive Datacenter Transport

Qizhe Cai, Mina Tahmasbi Arashloo, Rachit Agarwal

In ACM SIGCOMM 2022

[paper] [github]

Understanding Host Network Stack Overheads

Qizhe Cai, Shubham Chaudhary, Midhul Vuppalapati, Jaehyun Hwang, Rachit Agarwal

In ACM SIGCOMM 2021

[paper] [github]

TCP ≈ RDMA: CPU-efficient Remote Storage Access with i10

Jaehyun Hwang, Qizhe Cai, Ao Tang, Rachit Agarwal

In 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

In ACM SOSR 2018

[paper]

Teaching

Cornell University

Princeton University

Service

Program Committee Member

  • SOSP SysDW Workshop (2024)

External Reviewer

  • IEEE Transactions on Network and Service Management
  • IEEE Transactions on Mobile Computing
  • Computer Networks
  • IEEE Transactions on Consumer Electronics
  • IEEE Network Magazine