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CORSE Research team

compiler optimization and run-time systems

Team presentation

CORSE is a joint research group in the LIG laboratory that regroups the expertise on compiler optimization and run-time systems. Our research objectives are toward the optimization of performance and the reduction of energy consumption both for HPC and embedded processors. Existing targeted applications are in the domain of geophysics, nano materials, signal-processing, etc.

Languages, compilers, and run-time systems are some of the most important components to bridge the gap between applications and hardware. With the continuously increasing power of computers, expectations are evolving, with more and more ambitious, computational intensive and complex applications. As desktop PCs are becoming a niche and servers mainstream, three categories of computing impose themselves for the next decade: mobile, cloud, and super-computing. Thus diversity, heterogeneity (even on a single chip) and thus also hardware virtualization is putting more and more pressure both on compilers and run-time systems. However, because of the energy wall, architectures are becoming more and more complex and parallelism ubiquitous at every level. Unfortunately, the memory-CPU gap continues to increase and energy consumption remains an important issue for future platforms. To address the challenge of performance and energy consumption raised by silicon companies, compilers and run-time systems must evolve and, in particular, interact, taking into account the complexity of the target architecture. The overall objective of Corse is to address this challenge by combining static and dynamic compilation techniques, with more interactive embedding of programs and compiler environment in the runtime system.  

Research themes

CORSE project is structured along two main directions.The first direction belongs to the area of runtime systems with the objective of developing strong relations with compilers. This direction breaks down into:

  1. Memory management, data locality, dynamic load balancing
  2. Usage of program semantics derived from domain specific languages/compiler analysis
  3. Unified performance/functional debugging

The second direction belongs to the area of compiler analysis and optimization with the objective of combining dynamic analysis and optimization with static techniques. This direction breaks down into:

  1. Hybrid and extensible byte-code (parallelism/low-level)
  2. Hybrid compilation. Trace/static analysis
  3. Instruction scheduling and I/O complexity

The aim of CORSE is to ground those two research activities on the development of the end-to-end optimization of some specific domain applications such as computational mechanics, material physics (BigDFT), geophysics, wave propagation (SPECFEM3D, Ondes3D).

Keywords: Compiler optimization Run-time systems Memory management High-performance computing Energy consumption Instruction level parallelism Thread level parallelism Debugging Monitoring