About me

I'm an Assistant Professor (Lecturer in the UK system) in the Department of Computing at Imperial College London and a visiting researcher in the Confidential Computing Group at Microsoft Research Cambridge. I work at the intersection of operating systems, networking, and distributed systems and build systems that can provide tail-tolerance, fault-tolerance, and confidentiality guarantees leveraging emerging datacenter hardware.

Before joining imperial was a researcher at Microsoft Research Cambridge. I obtained my PhD in 2020 from EPFL under the supervision of Ed Bugnion. My thesis was awarded the 2021 Dennis M. Ritchie Award and the 2021 Honourable Mention for the Eurosys Roger Needham PhD Award. My PhD was supported by an IBM Fellowship and the Microsoft Swiss JRC. I did my undergrad in Electrical and Computer Engineering at NTUA.

I'm always looking for motivated PhD students and interns! If you are an Imperial student don't hesitate to reach out to me if you are interested in working on a project beyond the ones listed in the projects portal.

Teaching

• Networked Systems (COM 70041) (Winter 2023)
• Computer Networks and Distributed Systems (COM 70041) (Spring 2023, Spring 2024)
• Object Oriented Design & Programming (COM 70036) (Winter 2022)

Students

• Scofield Liu
• Konstantinos Prasopoulos (co-advised with Ed Bugnion)

Publications

Achieving Microsecond-Scale Tail Latency Efficiently with Approximate Optimal Scheduling

Rishabh Iyer, Musa Unal, Marios Kogias, George Candea

in SOSP 2023 Paper

When Concurrency Matters: Behaviour-Oriented Concurrency

Luke Cheeseman, Matthew J. Parkinson, Sylvan Clebsch, Marios Kogias, Sophia Drossopoulou, David Chisnall, Tobias Wrigstad, Paul Liétar

in OOPSLA 2023 Paper

HEELS: A Host-Enabled eBPF-Based Load Balancing Scheme

Rui Yang, Marios Kogias

in eBPF'23@SIGCOMM Paper

Creating Trust by Abolishing Hierarchies

Charly Castes, Adrien Ghosn, Neelu S. Kalani, Yuchen Qian, Marios Kogias, Mathias Payer, Edouard Bugnion

in HotOS 2023 Paper

Towards (Really) Safe and Fast Confidential I/O

Hugo Lefeuvre, David Chisnall, Marios Kogias, Pierre Olivie

in HotOS 2023 Paper

When Idling is Ideal: Optimizing Tail-Latency for Heavy-Tailed Datacenter Workloads with Perséphone

Henri Maxime Demoulin, Joshua Fried, Isaac Pedisich, Marios Kogias, Boon Thau Loo, Linh Thi Xuan Phan, Irene Zhang

in SOSP 2021 Paper

Harvesting Idle CPUs Safely and Efficiently in the Cloud

Yawen Wang, Kapil Arya, Marios Kogias, Manohar Vanga, Aditya Bhandari, Neeraja J. Yadwadkar, Siddhartha Sen, Sameh Elnikety, Christos Kozyrakis, and Ricardo Bianchini

in Eurosys 2021 Paper

Enclosure: language-based restriction of untrusted libraries

Adrien Ghosn, Marios Kogias, James Larus, Ed Bugnion

in ASPLOS 2021 Paper

Benchmarking, analysis, and optimization of serverless function snapshots

Dmitrii Ustiugov, Plamen Petrov, Marios Kogias, Ed Bugnion, Boris Grot

in ASPLOS 2021 Distinguished Artifact! Paper

Operating System and Network Co-Design for Latency-Critical Datacenter Applications

PhD Thesis link

Bypassing the Load Balancer without Regrets

Marios Kogias, Rishabh Iyer, Ed Bugnion

in SoCC 2020 Paper

Tail-Tolerance as a Systems Principle not a Metric

Marios Kogias, Ed Bugnion

in APNet2020 Paper

HovercRaft: Achieving Scalability and Fault-tolerance for microsecond-scale Datacenter Services

Marios Kogias, Ed Bugnion

in Eurosys 2020 Best Student Paper Award! Paper

R2P2: Making RPCs first-class datacenter citizens

Marios Kogias, George Prekas, Adrien Ghosn, Jonas Fietz, Ed Bugnion

in Usenix ATC 2019 Paper

Lancet: A self-correcting Latency Measuring Tool

Marios Kogias, Stephen Mallon, Ed Bugnion

in Usenix ATC 2019 Paper

Flow Control for Latency-Critical RPCs

Marios Kogias, Ed Bugnion

in KBNets@SIGCOMM2018 Paper

ZygOS: Achieving Low Tail Latency for Microsecond-scale Networked Tasks

George Prekas*, Marios Kogias*, Ed Bugnion (*equal co-authors)

in SOSP 2017 Paper