• CLOSED
    December 10 12:00am
    Facility closed more »
  • JAGS Invite
    December 10 12:00am
    Swim meet more »
  • Al-Mutanabbi Street Starts Here
    December 10 10:00am
    A car bomb exploded in 2007 in the historic intellectual center of Baghdad, al-Mutanabbi Street. More than 130 people died or were wounded, but the place escaped geographic bounds to become a global movement for the free exchange of ideas. View selections from a rare collection of artist's books and broadsides that continue to be generated a more »
  • Undergraduate Student Exhibition
    December 10 10:00am
    The Undergraduate Student Exhibition is juried by Liz Garvey of Simon Garvey Art Access Gallery in New York. Works are typically selected from hundreds of submission across a wide variety of media. more »
  • CLOSED
    December 11 12:00am
    The competition lap pool for lap swim is closed. more »
Saturday, December 10, 2016
    IU Calendar




    • CLOSED
      December 10 12:00am
      Facility closed more »
    • JAGS Invite
      December 10 12:00am
      Swim meet more »
    • Al-Mutanabbi Street Starts Here
      December 10 10:00am
      A car bomb exploded in 2007 in the historic intellectual center of Baghdad, al-Mutanabbi Street. More than 130 people died or were wounded, but the place escaped geographic bounds to become a global movement for the free exchange of ideas. View selections from a rare collection of artist's books and broadsides that continue to be generated a more »
    • Undergraduate Student Exhibition
      December 10 10:00am
      The Undergraduate Student Exhibition is juried by Liz Garvey of Simon Garvey Art Access Gallery in New York. Works are typically selected from hundreds of submission across a wide variety of media. more »
    • CLOSED
      December 11 12:00am
      The competition lap pool for lap swim is closed. more »
    Saturday, December 10, 2016
      IU Calendar




      • CLOSED
        December 10 12:00am
        Facility closed more »
      • JAGS Invite
        December 10 12:00am
        Swim meet more »
      • Al-Mutanabbi Street Starts Here
        December 10 10:00am
        A car bomb exploded in 2007 in the historic intellectual center of Baghdad, al-Mutanabbi Street. More than 130 people died or were wounded, but the place escaped geographic bounds to become a global movement for the free exchange of ideas. View selections from a rare collection of artist's books and broadsides that continue to be generated a more »
      • Undergraduate Student Exhibition
        December 10 10:00am
        The Undergraduate Student Exhibition is juried by Liz Garvey of Simon Garvey Art Access Gallery in New York. Works are typically selected from hundreds of submission across a wide variety of media. more »
      • CLOSED
        December 11 12:00am
        The competition lap pool for lap swim is closed. more »
      Saturday, December 10, 2016
        IU Calendar




        • CLOSED
          December 10 12:00am
          Facility closed more »
        • JAGS Invite
          December 10 12:00am
          Swim meet more »
        • Al-Mutanabbi Street Starts Here
          December 10 10:00am
          A car bomb exploded in 2007 in the historic intellectual center of Baghdad, al-Mutanabbi Street. More than 130 people died or were wounded, but the place escaped geographic bounds to become a global movement for the free exchange of ideas. View selections from a rare collection of artist's books and broadsides that continue to be generated a more »
        • Undergraduate Student Exhibition
          December 10 10:00am
          The Undergraduate Student Exhibition is juried by Liz Garvey of Simon Garvey Art Access Gallery in New York. Works are typically selected from hundreds of submission across a wide variety of media. more »
        • CLOSED
          December 11 12:00am
          The competition lap pool for lap swim is closed. more »
        Saturday, December 10, 2016

          About This Event

          Summary

          Summary

          High end parallel and multi-core processors rely on compilers to perform the necessary optimizations and exploit concurrency in order to achieve higher performance. However, source code for high performance computers is extremely complex to analyze and optimize. In particular, program analysis techniques often do not take into account complex expressions during the data dependence analysis phase. Most data dependence tests are only able to analyze linear expressions, even though non-linear expressions occur very often in practice. Therefore, considerable amounts of potential parallelism remain unexploited. In this talk we propose new data dependence analysis techniques to handle such complex instances of the dependence problem and increase program parallelization. Our method is based on a set of polynomial time techniques that can prove or disprove dependences in source codes with non-linear and symbolic expressions, complex loop bounds, arrays with coupled subscripts, and if-statement constraints. In addition our algorithm can produce accurate and complete direction vector information, enabling the compiler to apply further transformations. To validate our method we performed an experimental evaluation and comparison against the I-Test, the Omega test and the Range test in the Perfect and SPEC benchmarks. The experimental results indicate that our dependence analysis tool is accurate, efficient and more effective in program parallelization than the other dependence tests. The improved parallelization results into higher speedups and better program execution performance in several benchmarks.

          Kleanthis Psarris is Professor and Chair of the Department of Computer Science at the University of Texas at San Antonio. He received his B.S. degree in Mathematics from the National University of Athens, Greece in 1984. He received his M.S. degree in Computer Science in 1987, his M.Eng. degree in Electrical Engineering in 1989 and his Ph.D. degree in Computer Science in 1991, all from Stevens Institute of Technology in Hoboken, New Jersey. His research interests are in the areas of Parallel and Distributed Systems, Programming Languages and Compilers, and High Performance Computing. He has designed and implemented state of the art program analysis and compiler optimization techniques and he developed compiler tools to increase program parallelization and improve execution performance on advanced computer architectures. He has published extensively in top journals and conferences in the field and his research has been funded by the National Science Foundation and Department of Defense agencies. He is an Editor of the Parallel Computing journal. He has served on the Program Committees of several international conferences including the ACM International Conference on Supercomputing (ICS) in 1995, 2000, 2006 and 2008, the IEEE International Conference on High Performance Computing and Communications (HPCC) in 2008, 2009, and 2010, and the ACM Symposium on Applied Computing (SAC) in 2003, 2004, 2005 and 2006.

          This seminar will be held on Thursday, January 27th at 11:15 am in SL 110

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          Contact Information

          DeeDee Whittaker
          whittakd@cs.iupui.edu

          Event Site --- None ---
          Registration --- None ---

          Event Schedule

          There are no upcoming dates for this event.

          IU Calendar




          • CLOSED
            December 10 12:00am
            Facility closed more »
          • JAGS Invite
            December 10 12:00am
            Swim meet more »
          • Al-Mutanabbi Street Starts Here
            December 10 10:00am
            A car bomb exploded in 2007 in the historic intellectual center of Baghdad, al-Mutanabbi Street. More than 130 people died or were wounded, but the place escaped geographic bounds to become a global movement for the free exchange of ideas. View selections from a rare collection of artist's books and broadsides that continue to be generated a more »
          • Undergraduate Student Exhibition
            December 10 10:00am
            The Undergraduate Student Exhibition is juried by Liz Garvey of Simon Garvey Art Access Gallery in New York. Works are typically selected from hundreds of submission across a wide variety of media. more »
          • CLOSED
            December 11 12:00am
            The competition lap pool for lap swim is closed. more »
          Saturday, December 10, 2016