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Stratos Psomadakis

 [email protected]
National Technical University of Athens
psomas (AT) cslab.ece.ntua.gr

About | Research | News | Teaching
Talks | Service | Publications


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I am a systems engineer and systems researcher, based in Athens, Greece.

I currently work as a postdoctoral researcher at the Computing Systems Lab (CSLab) of the School of Electrical and Computer Engineering (ECE) at the National Technical University of Athens (NTUA), where I'm a member of the lab's systems group (ReSys).

I received my PhD from NTUA in December 2025. My doctoral dissertation, "Accelerating Virtual Memory with Hardware-Tailored Memory Management", was supervised by Prof. Georgios Goumas.

In a previous life, I worked as a cloud engineer and SRE, and was a Gentoo Linux developer, assisting with the maintenance of the Gentoo Linux kernel. I was also a founding member of FOSS NTUA, the university's free and open-source software community.

I'm at home in the Linux kernel, low-level systems code (C, Rust), userland tooling and scripting (Python, shell), and debugging across the whole software and system stack.

You can find more details in my CV.

Research Interests

My research interests lie in the fields of Operating Systems and Virtualization.

My main focus is on virtual memory — its overheads, and the OS-hardware interaction it entails — especially on the ARMv8-A and RISC-V ISAs.

I'm also interested in the efficient sandboxing of applications, mainly for serverless execution.

More recently, I've been working on systems for AI — LLM inference infrastructure and KV-cache management — memory management over CXL fabrics, and eBPF kernel extensions.

News

Older news…
  • [Feb. 2025] Our paper CXLfork: Fast Remote Fork over CXL Fabrics has been accepted@ASPLOS'25!
  • [Nov. 2024] Our work eBPF-mm: Userspace-guided memory management in Linux with eBPF has won 2nd place in the undergraduate category of the ACM Student Research Competition@MICRO'24!
  • [Jul. 2024] Our paper Elastic Translations: Fast virtual memory with multiple translation sizes has been accepted@MICRO'24!
  • [Apr. 2023] Our poster Transparent OS Support for Variable Translation Sizes has been accepted@EuroSys'23!

Teaching (TA)

Talks

Service

Artifact Evaluation Committees

Sub-reviewer

Publications

Conference Papers

  1. Squeezy: Rapid VM Memory Reclamation for Serverless Functions
    Orestis Lagkas Nikolos, Chloe Alverti, Stratos Psomadakis, Georgios Goumas, Nectarios Koziris
    EuroSys'26
  2. CXLfork: Fast Remote Fork over CXL Fabrics
    Chloe Alverti, Stratos Psomadakis, Burak Ocalan, Shashwat Jaiswal, Tianyin Xu, Josep Torrellas
    ASPLOS'25
    Won the Best Paper Award!
  3. Elastic Translations: Fast virtual memory with multiple translation sizes
    Stratos Psomadakis, Chloe Alverti, Vasileios Karakostas, Christos Katsakioris, Dimitrios Siakavaras, Konstantinos Nikas, Georgios Goumas, Nectarios Koziris
    MICRO'24
    PDF Code Poster Slides HiPEAC Paper Award!
  4. FaaSRail: Employing Real Workloads to Generate Representative Load for Serverless Research
    Christos Katsakioris, Chloe Alverti, Konstantinos Nikas, Dimitrios Siakavaras, Stratos Psomadakis, Nectarios Koziris
    HPDC'24
    Code
  5. DAPHNE: An Open and Extensible System Infrastructure for Integrated Data Analysis Pipelines
    Patrick Damme et al.
    CIDR'22
  6. Enhancing and Exploiting Contiguity for Fast Memory Virtualization
    Chloe Alverti, Stratos Psomadakis, Vasileios Karakostas, Jayneel Gandhi, Konstantinos Nikas, Georgios I. Goumas, Nectarios Koziris
    ISCA'20
    HiPEAC Paper Award!
  7. Efficient resource management for data centers: the ACTiCLOUD approach
    Vasileios Karakostas et al.
    SAMOS'18

Workshop Papers & Posters

  1. SnapBPF: Exploiting eBPF for Serverless Snapshot Prefetching
    Stratos Psomadakis, Dimitrios Siakavaras, Chloe Alverti, Symeon Porgiotis, Orestis Lagkas Nikolos, Christos Katsakioris, Konstantinos Nikas, Georgios Goumas, Nectarios Koziris
    HotStorage'25
    PDF Won the Futurewei Best Paper Award!
  2. Scaling Serverless Functions: Horizontal or Vertical? Both!
    Orestis Lagkas Nikolos, Chloe Alverti, Stratos Psomadakis, Georgios Goumas, Nectarios Koziris
    SESAME@EuroSys/ASPLOS'25
  3. eBPF-mm: Userspace-guided memory management in Linux with eBPF
    Konstantinos Mores, Stratos Psomadakis, Georgios Goumas
    ACM SRC@MICRO'24
    PDF Poster 2nd Place in the Undergraduate Category!
  4. Design, Implementation and Evaluation of the SVNAPOT Extension on a RISC-V Processor
    Nikolaos-Charalampos Papadopoulos, Stratos Psomadakis, Vasileios Karakostas, Nectarios Koziris, Dionisios N. Pnevmatikatos
    Posters@RISC-V Summit Europe'24
    Poster
  5. DAPHNE Runtime: Harnessing Parallelism for Integrated Data Analysis Pipelines
    Aristotelis Vontzalidis, Stratos Psomadakis, et al.
    Posters and Demos@Euro-Par'23
    PDF Poster
  6. Transparent OS Support for Variable Translation Sizes
    Stratos Psomadakis, Georgios Goumas
    Posters@EuroSys'23
    Poster
  7. FaaSCell: A Case for Intra-node Resource Management: Work-In-Progress
    Christos Katsakioris, Chloe Alverti, Konstantinos Nikas, Stratos Psomadakis, Vasileios Karakostas, Nectarios Koziris
    SESAME@EuroSys'23
  8. ACTiManager: An end-to-end interference-aware cloud resource manager
    Stratos Psomadakis, Stefanos Gerangelos, Dimitrios Siakavaras, Ioannis A. Papadakis, Marina Vemmou, Aspa Skalidi, Vasileios Karakostas, Konstantinos Nikas, Nectarios Koziris, Georgios I. Goumas
    Middleware Posters and Demos'19
  9. Extending storage support for unikernel containers
    Orestis Lagkas Nikolos, Konstantinos Papazafeiropoulos, Stratos Psomadakis, Anastassios Nanos, Nectarios Koziris
    WOSC@Middleware'19
  10. utmem: Towards Memory Elasticity in Cloud Workloads
    Aimilios Tsalapatis, Stefanos Gerangelos, Stratos Psomadakis, Konstantinos Papazafeiropoulos, Nectarios Koziris
    VHPC@ISC'18
  11. A Smart HPC Interconnect for Clusters of Virtual Machines
    Anastassios Nanos, Nikos Nikoleris, Stratos Psomadakis, Elisavet Kozyri, Nectarios Koziris
    VHPC@Euro-Par'11

Theses

  1. Accelerating Virtual Memory with Hardware-Tailored Memory Management
    Stratos Psomadakis
    PhD Dissertation, NTUA'25
    PDF
  2. High-Performance Interconnection Networks in Virtualized Environments
    Stratos Psomadakis
    Diploma (MEng) Thesis, NTUA'11

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