me shubho

[ contact ]

[ presently at ]

I am a graduate student at Department of Computer Science, University of California Davis. I work with Prof. John Owens on parallel algorithms on current and upcoming graphics processors. I am also affliated with Institute of Data Analysis and Visualization (IDAV).

My current research focuses on parallel-prefix scan and its variants and their efficient implementations on graphics hardware. The goal is to use it as a primitive in developing fast parallel sort and sparse solvers. I am also developing algorithms to build data structures which can store sparse data. The two avenues that I have explored are using a fast parallel sort to build Bounding Volume Hierarchies and develop a very fast algorithm which builds a perfect hash table on data parallel hardware. I am releasing all my work as a part of the data parallel primitives library CUDPP.

I have also worked with Aaron Lefohn on rendering techniques and parallel algorithms on graphics processors (GPUs) which currently enable interactive film preview and will enable high-quality graphics for games in the near future. During 2005 and 2006, I worked on generating high-quality shadows for dynamic scenes at interactive rates on GPUs. This work has also highlighted the importance of basic parallel algorithms in doing high-quality rendering. We have developed the fastest known implementation of the parallel scan algorithm on the GPU and have identified the need for fast implementations of other key algorithms . I also worked with Aaron on Glift, which provides the multi-dimensional hierarchical data structure needed to generate high-quality shadows.

[ past life ]

In my past life, I was working in the SunONE Application Server group at Sun Microsystems. I was there for four years and through two generations of the product, before the call of graphics proved irresistible. My non-graphics work also involves working on StorageTek's (now part of Sun Microsystems) REELs tape library management software. I also did a short stint in Tokyo, designing a large-scale online system.

Prior to starting my professional life, I did my Masters and Bachelors from Indian Institute of Technology(IIT), Kharagpur (India) in Mathematics.

[ publications ]

  • Real-time Parallel Hashing on the GPU D. Alcantara, A. Sharf, F. Abbasinejad, S. Sengupta, M. Mitzenmacher, J. D. Owens, N. Amenta ACM Transactions on Graphics (Proceedings of ACM SIGGRAPH Asia 2009)
  • Fast BVH Construction for GPUs C. Lauterbach, M. Garland, S. Sengupta, D. Manocha Proc. Eurographics 2009, March 2009
  • Efficient parallel scan algorithms for GPUs S. Sengupta, M. Harris, M. Garland NVIDIA Technical Report NVR-2008-003, Decemter 2008
  • Scan Primitives for GPU computing S. Sengupta, Mark Harris, Yao Zhang, J. D. Owens Graphics Hardware 2007, pages 97-106, August 2007, Best paper award
  • Parallel Prefix Sum (Scan) with CUDA Mark Harris, S. Sengupta, J. D. Owens GPU Gems 3, Hubert Nguyen, editor, chapter 39, Addison Wesley, August 2007
  • Resolution Matched Shadow Maps A Lefohn, S. Sengupta, J. D. Owens ACM Transactions on Graphics 2007
  • A Work-Efficient Step-Efficient Prefix Sum Algorithm. S. Sengupta, A. Lefohn, J. Owens. Proceedings of the 2006 Workshop on Edge Computing using New Commodity Architectures
  • Dynamic Adaptive Shadow Maps on Graphics Hardware. A Lefohn, S. Sengupta, J. Kniss, R. Strzodka, J. Owens SIGGRAPH 2005 Technical Sketch
  • Octree Textures on Graphics Hardware. J. Kniss, A. Lefohn, R. Strzodka, S. Sengupta, J. Owens. SIGGRAPH 2005 Technical Sketch
  • Glift: Generic, Effiicient, Random-Access GPU data structure. A. Lefohn, J. Kniss, R. Strzodka, S. Sengupta, J. Owens. ACM Transactions on Graphics, 25(1), Jan 2006 (accepted to SIGGRAPH 2005 with major revisions)
  • Assessment of Graphics Processing Units (GPUs) for Department of Defense (DOD) Digital Signal Processing (DSP) Applications. J. Owens, S. Sengupta, D. Horn. Technical Report ECE-CE-2005-3, Computer Engineering Research Laboratory, University of California, Davis
  • [ fellowships and awards ]

  • Best paper award at Graphics Hardware 2007
  • NVIDIA Fellowship 2007-2008
  • NVIDIA Fellowship 2008-2009
  • Best Graduate Researcher Award: Dept of Computer Science
  • [ resume ]

    My resume in PDF format