Faculty Directory
Nikos Hardavellas

Associate Professor of Computer Science

Associate Professor of Electrical and Computer Engineering

Contact

2233 Tech Drive
Mudd Room 3517
Evanston, IL 60208-3109

847-491-2970Email Nikos Hardavellas

Website

Nikos Hardavellas' Homepage

Parallel Architecture Group at Northwestern (PARAG@N)

Departments

Computer Science

Electrical and Computer Engineering

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Education

Ph.D. Computer Science, Carnegie Mellon University, Pittsburgh, PA

M.S. Computer Science, Carnegie Mellon University, Pittsburgh, PA

M.S. Computer Science, University of Rochester, Rochester, NY

B.S. Computer Science, University of Crete, Heraklion, Crete, Greece


Research Interests

Prof. Hardavellas works on parallel systems and computer architecture, primarily on techniques to enable extreme-scale multicore processors and practical quantum systems. Such designs are elusive due to the technological limitations on yield, power and memory bandwidth of conventional systems, and the nascency of quantum and silicon-photonic technologies. His research aims to pave the way to energy-efficient computing by investigating ideas to combat dark silicon, and to speed up the execution of programs by several factors through parallelism extraction, novel architectures, blending of compilers, runtimes, operating systems and hardware, and the use of emerging technologies (quantum, photonic). More recently, his research focus is on accelerating the advent of practical quantum computing through innovation at the quantum system stack. Prof. Hardavellas' work extends across multiple computing layers: emerging devices (nanophotonics, quantum), circuit design, processor architecture, memory systems, interconnects, compilers, runtime environments, system software and parallel execution models.


Selected Publications

  • Brian Suchy, Souradip Ghosh, Aaron Nelson, Zhen Huang, Drew Kersnar, Siyuan Chai, Michael Cuevas, Alex Bernat, Gaurav Chaudhary, Nikos Hardavellas, Simone Campanoni, and Peter Dinda. CARAT CAKE: Replacing Paging via Compiler/Kernel Cooperation. In Proceedings of the 2022 Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS), Lausanne, Switzerland, March 2022.
  • T. Tomesh, P. Gokhale, V. Omole, G. Ravi, K. Smith, J. Viszlai, X. Wu, N. Hardavellas, M. Martonosi, F. Chong. SupermarQ: A Scalable Quantum Benchmark Suite. In Proceedings of the 28th IEEE International Symposium on High-Performance Computer Architecture (HPCA), Seoul, South Korea, February 2022.
  • V. Kandiah, A.M. Gok, G. Tziantzioulis and N. Hardavellas. ST2 GPU: An Energy-Efficient GPU Design with Spatio-Temporal Shared-Thread Speculative Adders. In Proceedings of the 2021 Design Automation Conference (DAC), San Francisco, CA, December 2021.
  • V. Kandiah, S. Peverelle, M. Khairy, J. Pan, A. Manjunath, T. G. Rogers, T. M. Aamodt and N. Hardavellas. AccelWattch: A Power Modeling Framework for Modern GPUs. In Proceedings of the 54th IEEE/ACM International Symposium on Microarchitecture (MICRO), Athens, Greece, October 2021.
  • H. Han, T. Alexoudi, C. Vagionas, N. Pleros and N. Hardavellas. Pho$: A Case for Shared Optical Cache Hierarchies. In Proceedings of the ACM/IEEE International Symposium on Low Power Electronics and Design (ISLPED), July 2021. Best Paper Award Nomination.
  • M. Rainey, P. Dinda, K. Hale, R. Newton, U. A. Acar, N. Hardavellas, S. Campanoni. Task Parallel Assembly Language for Uncompromising Parallelism. In Proceedings of the 42nd ACM SIGPLAN Conference on Programming Language Design and Implementation (PLDI), June 2021
  • B. Suchy, S. Campanoni, N. Hardavellas and P. Dinda. CARAT: A Case for Virtual Memory through Compiler- and Runtime-based Address Translation. In Proceedings of the 41st ACM SIGPLAN Conference on Programming Language Design and Implementation (PLDI), London, UK, June 2020.
  • C. Hetland, G. Tziantzioulis, B. Suchy, M. Leonard, J. Han, J. Albers, N. Hardavellas and P. Dinda. Breaking Down Barriers: Paths to Fast Thread Synchronization on the Node. In Proceedings of the 28th International Symposium on High-Performance Parallel and Distributed Computing (HPDC), Phoenix, Arizona, June 2019.
  • E. A. Deiana, V. St-Amour, P. Dinda, N. Hardavellas and S. Campanoni. Unconventional Parallelization of Nondeterministic Applications. In Proceedings of the 23rd ACM International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS), Williamsburg, VA, March 2018.
  • Y. Demir and N. Hardavellas. Energy Proportional Photonic Flattened-Butterfly Networks. In Proceedings of the 22nd IEEE International Symposium on High Performance Computer Architecture (HPCA), Barcelona, Spain, March 2016.
  • Y. Demir and N. Hardavellas. EcoLaser: An Adaptive Laser Control for Energy-Efficient On-Chip Photonic Interconnects. In Proceedings of the International Symposium on Low Power Electronics and Design (ISLPED), La Jolla, CA, August 2014.
  • Y. Demir, Y. Pan, S. Song, N. Hardavellas, G. Memik and J. Kim. Galaxy: A High-Performance Energy-Efficient Multi-Chip Architecture Using Photonic Interconnects. In Proceedings of the ACM International Conference on Supercomputing (ICS), pp. 303--312, Munich, Germany, June 2014.
  • N. Hardavellas, M. Ferdman, B. Falsafi, and A. Ailamaki. Toward Dark Silicon in Servers. In IEEE Micro, Special Issue on Big Chips, Vol. 31(4), pp. 6-15, July/August 2011. IEEE Micro Spotlight Paper, February 2012.
  • N. Hardavellas, M. Ferdman, B. Falsafi and A. Ailamaki. Near-Optimal Cache Block Placement with Reactive Nonuniform Cache Architectures. IEEE Micro, Vol. 30(1), pp. 20-28, January/February 2010. IEEE Micro Top Picks from Computer Architecture Conferences.
  • I. Pandis, R. Johnson, N. Hardavellas and A. Ailamaki. Data-Oriented Transaction Execution. In Proceedings of the VLDB Endowment (PVLDB), Vol. 3(1), pp. 928-939, August 2010.
  • N. Hardavellas, M. Ferdman, B. Falsafi and A. Ailamaki. Reactive NUCA: Near-Optimal Block Placement and Replication in Distributed Caches. In Proceedings of the 36th ACM/IEEE Annual International Symposium on Computer Architecture (ISCA), pp. 184–195, Austin, TX, June 2009.
  • R. Johnson, I. Pandis, N. Hardavellas, A. Ailamaki, and B. Falsafi. Shore-MT: A Scalable Storage Manager for the Multicore Era. In Proceedings of the 12th International Conference on Extending Database Technology (EDBT), pp. 24–35, Saint-Petersburg, Russia, March 2009. Test of Time Award.
  • J. Kim, N. Hardavellas, K. Mai, B. Falsafi, and J. C. Hoe. Multi-bit Error Tolerant Caches Using Two-Dimensional Error Coding. In Proceedings of the 40th Annual IEEE/ACM International Symposium on Microarchitecture (MICRO), pp. 197–209, Chicago, IL, December 2007.
  • N. Hardavellas, I. Pandis, R. Johnson, N. Mancheril, A. Ailamaki, and B. Falsafi. Database Servers on Chip Multiprocessors: Limitations and Opportunities. In Proceedigs offf the 3rd Biennial Conference on Innovative Data Systems Research (CIDR), pp. 79–87, Asilomar, CA, January 2007.
  • T. F. Wenisch, S. Somogyi, N. Hardavellas, J. Kim, A. Ailamaki, and B. Falsafi. Temporal Streaming of Shared Memory. In Proceedings of the 32nd ACM/IEEE Annual International Symposium on Computer Architecture (ISCA), pp. 222–233, Madison, WI, June 2005.
  • R. J. Stets, S. Dwarkadas, N. Hardavellas, G. C. Hunt, L. Kontothanassis, S. Parthasarathy, and M. L. Scott. Cashmere-2L: Software Coherent Shared Memory on a Clustered Remote-Write Network. In Proceedings of the 16th ACM Symposium on Operating Systems Principles (SOSP), pp. 170–183, Saint Malo, France, October 1997.
  • L. Kontothanassis, G. C. Hunt, R. J. Stets, N. Hardavellas, M. Cierniak, S. Parthasarathy, W. Meira Jr., S. Dwarkadas, and M. L. Scott. VM-Based Shared Memory on Low-Latency, Remote-Memory-Access Networks. In Proceedings of the 24th ACM/IEEE Annual International Symposium on Computer Architecture (ISCA), pp. 157–169, Denver, CO, June 1997.