Tommaso Bonato

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I’m a fourth-year PhD student at the Scalable Parallel Computing Laboratory (SPCL) in the Department of Computer Science at ETH Zürich, advised by Prof. Torsten Hoefler. I’m also a student researcher at Microsoft, where I’ve been working with Abdul Kabbani for over three years.

My research focuses on datacenter networking, especially congestion control, load balancing, AI/HPC workloads, collective communication, and network topologies. I also contribute to the Ultra Ethernet Consortium (UEC) effort, including work on congestion-control and load-balancing proposals and related tooling (mostly HTSIM).

I received my BSc in Computer Science and Engineering from the University of Bologna and my MSc in Computer Science from ETH Zürich. During my studies, I interned at the European Space Agency (ESA) and Amazon.

Outside of research, I enjoy reading about space and space exploration, watching sci-fi movies, skiing, making (and cooking) pizza, and visiting theme parks.
ToR Switch ℹ️
Queue Size
0000000
Throughput
0000000
Packet Drops
0000000
50%
0.000%

Selected Publications

Below are some of my recent publications—feel free to reach out if you'd like to discuss any of them!

2026

  1. IEEE ToN
    Flowcut Switching: High-Performance Adaptive Routing with In-Order Delivery Guarantees
    Tommaso Bonato, Daniele De Sensi, Salvatore Di Girolamo, and 4 more authors
    IEEE/ACM Transactions on Networking, Jan 2026
    DOI arXiv
  2. EuroSys’26
    REPS: Recycled Entropy Packet Spraying for Adaptive Load Balancing and Failure Mitigation
    Tommaso Bonato, Abdul Kabbani, Ahmad Ghalayini, and 7 more authors
    In Proceedings of the European Conference on Computer Systems (EuroSys’26), Apr 2026
    DOI arXiv

2025

  1. SC’25
    ATLAHS: An Application-centric Network Simulator Toolchain for AI, HPC, and Distributed Storage
    Siyuan Shen*, Tommaso Bonato*, Zhiyi Hu, and 3 more authors
    In Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis (SC’25), Nov 2025
    Best Student Paper Finalist
    DOI arXiv
  2. SC’25
    Uno: A One-Stop Solution for Inter- and Intra-Datacenter Congestion Control and Reliable Connectivity
    Tommaso Bonato*, Sepehr Abdous*, Abdul Kabbani, and 11 more authors
    In Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis (SC’25), Nov 2025
    DOI arXiv

2024

  1. NSDI’24
    Swing: Short-cutting Rings for Higher Bandwidth Allreduce
    Daniele De Sensi, Tommaso Bonato, David Saam, and 1 more author
    In 21st USENIX Symposium on Networked Systems Design and Implementation (NSDI ’24), Apr 2024
    DOI arXiv Slides

2022

  1. SC’22
    HammingMesh: A Network Topology for Large-Scale Deep Learning
    Torsten Hoefler, Tommaso Bonato, Daniele De Sensi, and 7 more authors
    In Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis (SC’22), Nov 2022
    SC22 Reproducibility Advancement Award and invited as CACM Research Highlight
    DOI arXiv