Welcome / يا مرحبا

I’m an SNSF Postdoctoral Fellow at the Scalable Parallel Computing Laboratory (SPCL), ETH Zürich, advised by Prof. Torsten Hoefler. I obtained my PhD degree in Computer Engineering from Bilkent University under the supervision of Prof. Cevdet Aykanat. In my reasearch, I design combinatorial algorithms and methods for reducing data movement overheads in parallel scientific and machine learning applications running on HPC systems. These algorithms can be applied in shared-memory setting, e.g., reducing memory accesses or improving data locality, or in distributed-memory setting, e.g., reduce volume of communication and number of exchanged messages.

Research Interests

I specialize in designing efficient parallel algorithms for machine learning and scientific computing applications that are difficult to parallelize.

Parallel & High-Performance Computing
Sparse Computations, Iterative Solvers
Sparse Tensor Decompositions
Graph/Hypergraph partitioning
Sparse matrix reordering methods
Machine Learning: Graph & Hypergraph Neural Networks, Parallelizing LLMs

News

[Jun. 2024] I will attend and speak at the CERFACS Sparse Days 2024 meeting in Toulouse, France.
[May 2024] I will be at the ISC24 conference in Hamburg, Germany!
[Apr. 2024] SpComm3D paper is out on arXiv!
[Feb. 2024] I’m co-organizing a Non-EU/EFTA Postdoc Career in Switzerland Information Event on 8th of February at ETH Alumni Pavillon.
[Jun. 2023] My proposal for the SNSF Swiss Postdoctoral Fellowship is accepted! (along with 70 others out of 500+ applications)
[May 2023] Moved to Switzerland and started a new position as a PostDoc at the Scalable Parallel Computing Laboratory (SPCL), Department of Computer Science, ETH Zürich.
[Jul. 2022] I have successfully defended my Ph.D. thesis titled “Novel Algorithms and Models for Scaling Parallel Sparse Tensor and Matrix Factorizations”. 🎉
[Feb. 2022] I’m presenting my work on “Sparse Tensor Partitioning for Scalable Distributed CPD-ALS” at SIAM PP22.

Publications

[Web of Science] [DBLP] [ORCID]

arXiv

SpComm3D: A Framework for Enabling Sparse Communication in 3D Sparse Kernels

Nabil Abubaker, Torsten Hoefler

arXiv preprint arXiv:2404.19638

PDF Code

PPoPP

Arrow Matrix Decomposition: A Novel Approach for Communication-Efficient Sparse Matrix Multiplication

Lukas Gianinazzi, Alexandros Nikolaos Ziogas, Langwen Huang, Piotr Luczynski, Saleh Ashkboosh, Florian Scheidl, Armon Carigiet, Chio Ge, Nabil Abubaker, Maciej Besta, Tal Ben-Nun, Torsten Hoefler

ACM SIGPLAN Annual Symposium on Principles and Practice of Parallel Programming (PPoPP), 2024.

PDF Code

TC

Minimizing Staleness and Communication Overhead in Distributed SGD for Collaborative Filtering

Nabil Abubaker, Orhun Caglayan, M Ozan Karsavuran, Cevdet Aykanat

IEEE Transactions on Computers, 2023.

PDF

TKDE

Scaling Stratified Stochastic Gradient Descent for Distributed Matrix Completion

Nabil Abubaker, M Ozan Karsavuran, Cevdet Aykanat

IEEE Transactions on Knowledge and Data Engineering, 2023.

PDF Code

TPDS

Scalable Unsupervised ML: Latency Hiding in Distributed Sparse Tensor Decomposition

Nabil Abubaker, M Ozan Karsavuran, Cevdet Aykanat

IEEE Transactions on Parallel and Distributed Systems, 2021.

PDF Code

TPDS

True Load Balancing for Matricized Tensor Times Khatri-Rao Product

Nabil Abubaker, Seher Acer, Cevdet Aykanat

IEEE Transactions on Parallel and Distributed Systems, 2021.

PDF

TPDS

Spatiotemporal graph and hypergraph partitioning models for sparse matrix-vector multiplication on many-core architectures

Nabil Abubaker, Kadir Akbudak, Cevdet Aykanat

IEEE Transactions on Parallel and Distributed Systems, 2018.

PDF

CNS

Privacy-preserving fog computing paradigm

Nabil Abubaker, Leonard Dervishi, Erman Ayday

IEEE Conference on Communications and Network Security (CNS), 2017.

PDF

Teaching

I was a teaching assistant for the following courses @Bilkent University:

[ Year/Semester code (XXZZ): XX as in year 20XX; YY: FAll, SPring, SuMmer (or is it the second M?) ]

CS473: Algorithms I. (16FA, 17SP, 17FA, 18FA, 19SP, 19FA, 20SP, 20FA, 21SP, 21FA)
CS458: Software Verification and Validation. (20SP, 20SM)
CS101/2: Algorithms and Programming I/II. (14FA, 15SP, 15FA, 17SM, 18SP).
CS201/2: Fundamental Structure of Computer Science I/II. (15SM, 16SP, 16SM)
CS114: Introduction to programming for Engineers ( used to be a Java-based course, now replaced with CS115 which is a Python-based course). (15SM, 16FA)
CS223: Digital Design. (15FA, 16SP)

I was an instructor for “Computer Architecture II” course remotely during the 2020-2021 Spring semester (pandemic times) @An-Najah National University.