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Research / Projects

Journal Publications

  1. “High-Performance Biocomputing for Simulating the Spread of Contagion over Large Contact Networks”, Keith R. Bisset, Ashwin M. Aji, Madhav V. Marathe and Wu-chun Feng. BMC Genomics, 13 (Suppl 2): S3, April 2012.

Conference Publications

  1. [To Appear] “Online Performance Projection for Clusters with Heterogeneous GPUs.”, Ashwin M. Aji, Lokendra S. Panwar, Jiayuan Meng, Pavan Balaji, Wu-chun Feng. 19th IEEE International Conference on Parallel and Distributed Systems (ICPADS), Seoul, South Korea, December 2013 (Aji and Panwar have equal contributions).
  2. “On the Efficacy of GPU-Integrated MPI for Scientific Applications.”, Ashwin M. Aji, Lokendra S. Panwar, Feng Ji, Milind Chabbi, Karthik Murthy, Pavan Balaji, Keith R. Bisset, James Dinan, Wu-chun Feng, John Mellor-Crummy, Xiaosong Ma, Rajeev Thakur. In Proceedings of the ACM International Symposium on High-Performance Parallel and Distributed Computing (HPDC), New York, USA, June 2013.
  3. “pVOCL: Power-Aware Dynamic Placement and Migration in Virtualized GPU Environments”, Palden Lama, Yan Li, Ashwin M. Aji, Pavan Balaji, James Dinan, Shucai Xiao, Yunquan Zhang, Wu-chun Feng, Rajeev Thakur, Xiaobo Zhou. 33rd IEEE International Conference on Distributed Computing Systems (ICDCS 2013).
  4. “MPI-ACC: An Integrated and Extensible Approach to Data Movement in Accelerator-Based Systems”, Ashwin M. Aji, James Dinan, Darius Buntinas, Pavan Balaji, Wu-chun Feng, Keith R. Bisset, Rajeev Thakur. In Proceedings of the 14th IEEE International Conference on High Performance Computing and Communications (HPCC), Liverpool, UK, June 2012.
  5. “DMA-Assisted, Intranode Communication in GPU Accelerated Systems”, Feng Ji, Ashwin M. Aji, James Dinan, Darius Buntinas, Pavan Balaji, Rajeev Thakur, Wu-chun Feng, Xiaosong Ma. In Proceedings of the 14th IEEE International Conference on High Performance Computing and Communications (HPCC), Liverpool, UK, June 2012.
  6. “On the Efficacy of a Fused CPU+GPU Processor (or APU) for Parallel Computing”, Mayank Daga, Ashwin M. Aji and Wu-chun Feng. 2011 Symposium on Application Accelerators in High-Performance Computing (SAAHPC), Knoxville, Tennessee, USA, July 2011.
  7. “Bounding the Effect of Partition Camping in GPU Kernels”, Ashwin M. Aji, Mayank Daga and Wu-chun Feng. 2011 ACM International Conference on Computing Frontiers, Ischia, Italy, May 2011 (Aji and Daga have equal contributions).
  8. “High-Performance Biocomputing for Simulating the Spread of Contagion over Large Contact Networks”, Keith R. Bisset, Ashwin M. Aji, Madhav V. Marathe and Wu-chun Feng. Proc. of the 1st IEEE International Conference on Computational Advances in Bio and medical Sciences (ICCABS), Orlando, Florida, USA, February 2011.
  9. “GPU-RMAP: Accelerating Short Read Mapping on Graphics Processors”, Ashwin M. Aji, Liqing Zhang and Wu-chun Feng. Proc. of the 13th IEEE International Conference on Computational Science and Engineering (CSE-2010), Hong Kong SAR, China, December 2010.
  10. “On the Robust Mapping of Dynamic Programming onto a Graphics Processing Unit”, Shucai Xiao, Ashwin M. Aji, and Wu-chun Feng. Proc. of the 15th International Conference on Parallel and Distributed Systems, Shenzhen, China, December 2009. [bibTex]
  11. “Optimizing Performance, Cost, and Sensitivity in Pairwise Sequence Search on a Cluster of PlayStations”, Ashwin M. Aji and Wu-chun Feng. Proc. of the 8th IEEE International Conference on BioInformatics and BioEngineering (BIBE 2008), Athens, Greece, October 2008. [bibTeX]
  12. “Cell-Swat: Modeling and Scheduling Wavefront Computations on the Cell Broadband Engine”, Ashwin M. Aji, Wu-chun Feng, Filip Blagojevic and Dimitrios S. Nikolopoulos. Proc. of the 2008 ACM International Conference on Computing Frontiers, Ischia, Italy, May 2008. ACM Pres. [bibTeX]

Workshop Publications

  1. “Synchronization and Ordering Semantics in Hybrid MPI+GPU Programming”, Ashwin M. Aji, Pavan Balaji, James Dinan, Wu-chun Feng, and Rajeev Thakur In Proceedings of the 3rd IEEE International Workshop on Accelerators and Hybrid Exascale Systems (in conjunction with the 27th IEEE International Parallel and Distributed Processing Symposium), Boston, USA, May 2013.
  2. “Efficient Intranode Communication in GPU-Accelerated Systems”, Feng Ji, Ashwin M. Aji, James Dinan, Darius Buntinas, Pavan Balaji, Wu-chun Feng, and Xiaosong Ma. In Proceedings of the 2nd IEEE International Workshop on Accelerators and Hybrid Exascale Systems (in conjunction with the 26th IEEE International Parallel and Distributed Processing Symposium), Shanghai, China, May 2012.
  3. “Simulating the Spread of Infectious Disease over Large Realistic Social Networks using Charm++”, Keith Bisset, Ashwin M. Aji, Eric Bohm, Laxmikant V. Kale Tariq Kamal, Madhav Marathe, and Jae-Seung Yeom. 17th International Workshop on High-Level Parallel Programming Models and Supportive Environments (HIPS 2012), May 2012.

Theses/Dissertations

  1. [M.S. Thesis] “Exploiting Multigrain Parallelism in Pairwise Sequence Search on Emergent CMP Architectures”, Ashwin Mandayam Aji, Advisor: Dr. Wu-chun Feng. Computer Science and Applications, Virginia Tech, Blacksburg, Virginia, USA, June 2008.

Presentations

  1. [PhD Forum] “ Programming High Performance Heterogeneous Computing Systems: Paradigms, Models and Metrics ”, Doctoral dissertation research showcase, 2012 ACM/IEEE Supercomputing (SC), Salt Lake City, USA, November 2012.
  2. “Bounding the Effect of Partition Camping in GPU Kernels ”, 2011 ACM International Conference on Computing Frontiers, Ischia, Italy, May 2011.
  3. “On the Efficacy of a Fused CPU+GPU Processor for Parallel Computing ”, 2011 Symposium on Application Accelerators in High-Performance Computing (SAAHPC'11), Knoxville, Tennessee, July 2011.
  4. “Cell-Swat: Modeling and Scheduling Wavefront Computations on the Cell Broadband Engine”, ACM International Conference on Computing Frontiers, Ischia, Italy, May 2008.[pdf]
  5. “Application-to-Hardware Mapping for Advanced Architectures”, 2008 Mid-year Workshop, NSF Center for High-Performance Reconfigurable Computing (CHREC), Provo, Utah, USA, June 2008.[pdf]

Research Interests

  • High Performance Computing
  • Emerging Parallel Architectures: for example, GPGPUs, APUs, etc.
  • Parallel Programming Models
  • Parallel Algorithms