With ubiquitous multicore processors and the increasing role of hardware accelerators, polyhedral compilation techniques have gained a lot of attention in both academia and industry. Polyhedral compilation provides a homogeneous framework to design effective optimizations for high performance computing, addressing coarse-grain and fine-grain parallelism, distributed- and shared-memory parallelism. IMPACT is a unique workshop focusing exclusively on polyhedral compilation technologies, bringing together researchers and practitioners for a high-quality one-day event including technical paper presentations and panel discussions. This is the fourth edition of IMPACT and is being organized in conjunction with with HiPEAC 2014 in Vienna, Austria as a full-day workshop.

We welcome both theoretical and experimental papers on all aspects of polyhedral compilation and optimization. We also welcome submissions describing preliminary results, crazy new ideas, position papers, experience reports, and available tools, with an aim to stimulate discussions, collaborations, and advances in the field. Topics of interest include, but are not limited to:

• program optimization (automatic parallelization, tiling, etc.)
• code generation
• data/communication management on GPUs, accelerators and distributed systems
• hardware/high-level synthesis for affine programs
• static analysis
• program verification
• model checking
• theoretical foundations of the polyhedral model
• extensions of the polyhedral model
• scalability and robustness of polyhedral compilation techniques
• tool demonstration

Submissions

Submissions should not exceed 8 pages (recommended 6 pages) formatted as per ACM proceedings format. When preparing your manuscript, please use the "Tighter Alternate style" available from http://www.acm.org/sigs/publications/proceedings-templates .
Submissions should be in PDF format and printable on US letter or A4 sized paper. Please send your submission by the (extended) deadline to:
impact-chairs@lists.gforge.inria.fr
Please indicate in your email if you wish to submit as a:

• regular paper
• position paper
• wild and crazy idea
• tool demonstration

Proceedings will be published online. If the final version of an accepted paper does not sufficiently address the comments of the reviewers, then it may be accompanied by a note from the program committee. Publication at IMPACT will not prevent later publication in conferences or journals of the presented work.

Important Dates

Submission deadline:	October 18October 25, 2013 AoE
Notification of decision:	November 25, 2013
Final version due:	December 09, 2013
Workshop:	January 20, 2014

Program

Session I: Scheduling (10:00 - 11:00)

Session Chair: Alain Darte



• Schedule Trees
  Sven Verdoolaege, Serge Guelton, Tobias Grosser, Albert Cohen
  [paper] [slides] [bib]
  


• Throughput Optimization for High-Level Synthesis Using Resource Constraints
  Peng Li, Louis-Noel Pouchet, Jason Cong
  [slides] [bib] (no final version of the paper was received)
  



Break (11:00 - 11:30)



Session II: Measurements and Applications (11:30 - 13:00)

Session Chair: Alexandra Jimborean



• Energy Auto-tuning using the Polyhedral Approach
  Wei Wang, John Cavazos, Allan Porterfield
  [paper] [slides] [bib]
  


• On the Variety of Static Control Parts in Real-World Programs:
  from Affine via Multi-dimensional to Polynomial and Just-in-Time
  Andreas Simbürger, Armin Größlinger
  [paper] [slides] [bib]
  


• Polyhedral Methods for Improving Parallel Update-in-Place
  Jing Guo, Robert Bernecky, Jeyarajan Thiyagalingam, Sven-Bodo Scholz
  (presented by Clemens Grelck)
  [paper] [slides] [bib]
  



Lunch (13:00 - 14:00)



Session III: Tiling (15:00 - 16:30)

Session Chair: Saday Sadayappan



• Constant Aspect Ratio Tiling
  Guillaume Iooss, Sanjay Rajopadhye, Christophe Alias, Yun Zou
  [paper] [slides] [bib]
  


• Parametric Tiling with Inter-Tile Data Reuse
  Alain Darte, Alexandre Isoard
  [paper] [slides] [bib]
  


• Tiling for Dynamic Scheduling
  Ravi Teja Mullapudi, Uday Bondhugula
  [paper] [slides] [bib]
  



Break (16:30 - 17:00)



Session IV: Discussion (17:00 - )

Session Chair: Sanjay Rajopadhye



• Understanding PolyBench/C 3.2 Kernels (position paper)
  Tomofumi Yuki
  [paper] [slides] [bib]
  


• Domain-specific languages and optimizers
  (short presentation by Uday R Bondhugula) [slides]


• Dissemination
  (short presentation by Tobias Grosser) [slides]

Location

The workshop is organized in conjunction with HiPEAC 2014 and will take place in room Saloon IV-VI.

Contact us

Please send any questions or comments to Sanjay Rajopadhye and Sven Verdoolaege: impact-chairs@lists.gforge.inria.fr.