Fourth International Workshop onParallel Programming Models and

Systems Software for High-End Computing(P2S2 ‘11)

Pavan Balaji, Argonne National Laboratory P2S2 Opening Remarks (09/13/2011)

Organizing Committee

• Steering Committee

William GroppUniversity of Illinois,Urbana Champaign

• Program Co-chairs

Pavan BalajiArgonne National Laboratory

Abhinav VishnuPacific Northwest National Laboratory

Vijay SaraswatIBM Research

Yong ChenTexas Tech University

Pavan Balaji, Argonne National Laboratory P2S2 Opening Remarks (09/13/2011)

Workshop Goals

Primary Goal: Consolidating ideas for programming and managing high-end computing systems

Large machines almost always mean complex architectures– Sometimes it means a larger count of existing machines– Oftentimes it means disruptive changes to our current understanding

of system architectures

We hope to serve as a venue for researchers to exchange ideas in how the community can build and use the world’s largest systems!

Pavan Balaji, Argonne National Laboratory P2S2 Opening Remarks (09/13/2011)

Ready or Not, Here it Comes!

10 PFlops in 2011

100 PFlops in 2015

Expected to have an Exaflop system in 2018-2019 !

Pavan Balaji, Argonne National Laboratory P2S2 Opening Remarks (09/13/2011)

Systems Are Already Very Complex

Need to ConvertSystem Capacity

toSystem Capability

Pavan Balaji, Argonne National Laboratory P2S2 Opening Remarks (09/13/2011)

Challenges for Massive Systems

Scalability– Systems with hundreds of thousands of cores exist

• We will have a million cores soon

– Small performance problems can get brutal at scale !

Ease of Use (The “Wizard Gap”)– Not everyone is a parallel programming expert– … and yet, everyone wants the best performance

We live in a heterogeneous jungle– Multicore processors, Integrated Accelerator cores, GPUs, FPGAs

Reliability and Maintainability– Failure detection and transparency– Ease of administration

Pavan Balaji, Argonne National Laboratory P2S2 Opening Remarks (09/13/2011)

Workshop Areas of Interest

Parallel Programming Models and their associated Runtime Systems and other Systems Software as applicable to high-end computing systems

Questions that we are pursuing:– How should the largest machines in the world be programmed?– What runtime systems and other system software is necessary to

program and manage these massive systems efficiently and productively?

Pavan Balaji, Argonne National Laboratory P2S2 Opening Remarks (09/13/2011)

Program Committee: 23 members

Ahmad Afsahi, Queen's University George Almasi, IBM Research Taisuke Boku, Tsukuba University Ron Brightwell, Sandia National Laboratory Surendra Byna, Lawrence Berkeley National Lab Zhihui Du, Tsinghua University Rahul Garg, IBM Research, India Torsten Hoefler, Indiana University Zhiyi Huang, University of Otago, New Zealand Hai Jin, Huazhong University of Science and Tech. Darren Kerbyson, Pacific Northwest National Lab Zhiling Lan, Illinois Institute of Technology Doug Lea, State University of New York at Oswego Heshan Lin, Virginia Tech Sonia Sachs, Department of Energy Bronis de Supinski, Lawrence Livermore National

Laboratory

Guangming Tan, Chinese Academy of Sciences Rajeev Thakur, Argonne National Laboratory Vinod Tipparaju, Oak Ridge National Laboratory Jesper Traeff, University of Vienna, Europe Bharadwaj Veeravalli, National Univ. of Singapore Weikuan Yu, Auburn University Yunquan Zhang, Chinese Academy of Sciences

Pavan Balaji, Argonne National Laboratory P2S2 Opening Remarks (09/13/2011)

Paper Reviews

Totally 27 papers were considered for the workshop– 5 reviews per paper– Program Committee telemeeting to finalize accepted papers– 11 papers were accepted

Some of the accepted papers have been invited to submit to a special issue of the International Journal of Supercomputing (JoS)

Pavan Balaji, Argonne National Laboratory P2S2 Opening Remarks (09/13/2011)

Logistics

Four sessions:– Three sessions for regular technical paper presentations– One session for an invited keynote talk

If you are a presenter:– Please meet your session chair before your session starts– Bios for each presenter needed– Session chairs might require presentations to be copied to a common

presentation laptop before the session (please check with your session chair!)

Wireless Connectivity

Pavan Balaji, Argonne National Laboratory P2S2 Opening Remarks (09/13/2011)

P2S2 Sessions Session1: Invited Keynote Talk

[Time: 9:00 am to 10:00 am] Session Chair: Pavan Balaji

– “Exascale: Why is it Different?”, Prof. Barbara Chapman

Session 2: Programming Models and Runtime Systems

[Time: 10:30 am to 12:20 pm] Moderator: Martin Schulz

– "Recomposing An Irregular Algorithm Using a Novel Low-Level PGAS Model", Megan Vance and Peter Kogge

– "A Middleware for Concurrent Programming in MPI Applications", Tobias Berka, Helge Hagenauer and Marian Vajtersic

– "Kangaroo: Reliable execution of scientific applications with DAG programming model", Kai Zhang, Kang Chen, Wei Xue

– "JETS: Language and System Support for Many Parallel Task Computing", Justin Wozniak and Michael Wilde

Pavan Balaji, Argonne National Laboratory P2S2 Opening Remarks (09/13/2011)

P2S2 Sessions (contd.) Session3: Scheduling and Workflows [Time: 1:30 pm to 3:20 pm] Session Chair: Vinod Tipparaju, AMD

– "Energy-Constrained Dynamic Resource Allocation in a Heterogeneous Computing Environment", B. Dalton Young, Jonathan Apodaca, Luis Diego Briceno, Jay Smith, Sudeep Pasricha, Anthony A. Maciejewski, Howard Jay Siegel, Bhavesh Khemka, Shirish Bahirat, Adrian Ramirez, and Yong Zou

– "Job Co-Scheduling on Coupled High-End Computing Systems", Wei Tang, Narayan Desai, Venkatram Vishwanath, Daniel Buettner, Zhiling Lan

– "Integrating Scientific Workflows and Large Tiled Display Walls: Bridging the Visualization Divide", Hoang Nguyen, David Abramson, Blair Bethwaite, Minh Ngoc Dinh, Colin Enticott, Stephen Firth, Slavisa Garic, Ian Harper, Martin Lackmann, A.B.M. Russel, Stefan Schek, Mary Vail

– "Restricted Admission Control in View-Oriented Transactional Memory", K. Leung and Z. Huang

Session 4: Communication and I/O [Time: 3:40 pm to 5:00 pm] Moderator: Brice Goglin, INRIA

– "CellPilot: A Seamless Communication Solution for Hybrid Cell Clusters", Natalie Girard, William Gardner, John Carter and Gary Grewal

– "Interval Based I/O: A New Approach to Providing High Performance Parallel I/O", Jeremy Logan and Phillip Dickens

– "Improving Performance of the Irregular Data Intensive Application with Small Computation Workload for CMPs", Zhimin Gu

Pavan Balaji, Argonne National Laboratory P2S2 Opening Remarks (09/13/2011)

Plans for P2S2 2012

Steering Committee:– William Gropp (University of Illinois, Urbana Champaign)– Vijay Saraswat (IBM Research)

Program Co-chairs:– Pavan Balaji (Argonne National Laboratory)– Abhinav Vishnu (Pacific Northwest National Laboratory)– Yong Chen (Oak Ridge National Laboratory)

Will continue to be associated with ICPP 2012 Like this year, we again plan to have special issue with a journal

– Possibly the Journal of Supercomputing, again

Get Involved !– Paper submissions– Workshop attendance– Advertizing